/mandos/release : revision 237.7.751

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#!/usr/bin/python

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

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#

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#!/usr/bin/python3 -bI

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# -*- mode: python; after-save-hook: (lambda () (let ((command (if (fboundp 'file-local-name) (file-local-name (buffer-file-name)) (or (file-remote-p (buffer-file-name) 'localname) (buffer-file-name))))) (if (= (progn (if (get-buffer "*Test*") (kill-buffer "*Test*")) (process-file-shell-command (format "%s --check" (shell-quote-argument command)) nil "*Test*")) 0) (let ((w (get-buffer-window "*Test*"))) (if w (delete-window w))) (progn (with-current-buffer "*Test*" (compilation-mode)) (display-buffer "*Test*" '(display-buffer-in-side-window)))))); coding: utf-8 -*-

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#

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

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#

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#

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

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# service publisher, downloaded from

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

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

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

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

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#

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#

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# Everything else is

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#

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

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

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#

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# This file is part of Mandos.

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#

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

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

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

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# (at your option) any later version.

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#

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

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

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

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# WITHOUT ANY WARRANTY; without even the implied warranty of

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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

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# GNU General Public License for more details.

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#

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#

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

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# along with this program. If not, see

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

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#

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

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#

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

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#

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#

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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import SocketServer as socketserver

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try:

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from future_builtins import *

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except ImportError:

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pass

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try:

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import SocketServer as socketserver

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except ImportError:

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import socketserver

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import socket

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import argparse

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import datetime

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import errno

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import gnutls.crypto

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import gnutls.connection

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import gnutls.errors

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import gnutls.library.functions

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import gnutls.library.constants

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import gnutls.library.types

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import ConfigParser as configparser

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try:

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import ConfigParser as configparser

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except ImportError:

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import configparser

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import sys

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import re

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import os

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import struct

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import fcntl

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import functools

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import cPickle as pickle

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try:

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import cPickle as pickle

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except ImportError:

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import pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import collections

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import codecs

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import unittest

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import random

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import dbus

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import dbus.service

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import gobject

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import avahi

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import gi

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from gi.repository import GLib

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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import ctypes.util

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import xml.dom.minidom

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import inspect

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import GnuPGInterface

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try:

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if sys.version_info.major == 2:

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__metaclass__ = type

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str = unicode

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# Add collections.abc.Callable if it does not exist

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try:

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collections.abc.Callable

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except AttributeError:

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class abc:

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Callable = collections.Callable

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collections.abc = abc

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del abc

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# Show warnings by default

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if not sys.warnoptions:

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import warnings

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warnings.simplefilter("default")

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# Try to find the value of SO_BINDTODEVICE:

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try:

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

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

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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except AttributeError:

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try:

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# This is where SO_BINDTODEVICE was up to and including Python

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# 2.6, and also 3.2:

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from IN import SO_BINDTODEVICE

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except ImportError:

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SO_BINDTODEVICE = None

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version = "1.5.2"

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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 < (3, 2):

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configparser.Configparser = configparser.SafeConfigParser

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version = "1.8.9"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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logging.captureWarnings(True) # Show warnings via the logging system

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syslogger = None

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try:

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.if_nametoindex)

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if_nametoindex = ctypes.cdll.LoadLibrary(

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

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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interface))

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

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ifreq[16:20])[0]

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

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

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return interface_index

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def copy_function(func):

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

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if sys.version_info.major == 2:

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return types.FunctionType(func.func_code,

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func.func_globals,

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func.func_name,

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func.func_defaults,

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func.func_closure)

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else:

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return types.FunctionType(func.__code__,

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func.__globals__,

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func.__name__,

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func.__defaults__,

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func.__closure__)

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

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"""init logger and add loglevel"""

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global syslogger

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syslogger = (logging.handlers.SysLogHandler(

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facility=logging.handlers.SysLogHandler.LOG_DAEMON,

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address="/dev/log"))

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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

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pass

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class PGPEngine(object):

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class PGPEngine:

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

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def __init__(self):

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self.gnupg = GnuPGInterface.GnuPG()

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

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self.gnupg = GnuPGInterface.GnuPG()

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self.gnupg.options.meta_interactive = False

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self.gnupg.options.homedir = self.tempdir

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

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'--quiet',

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'--no-use-agent'])

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self.gpg = "gpg"

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try:

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

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for line in output.splitlines():

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

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if name == b"gpg":

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self.gpg = path

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break

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except OSError as e:

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if e.errno != errno.ENOENT:

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raise

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self.gnupgargs = ['--batch',

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'--homedir', self.tempdir,

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'--force-mdc',

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'--quiet']

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

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

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

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def __enter__(self):

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return self

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

230

231

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

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self._cleanup()

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return False

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234

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def __del__(self):

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self._cleanup()

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237

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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):

163

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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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250

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def password_encode(self, password):

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

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

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

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

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if len(encoded) > 2048:

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

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

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

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

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return encoded

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def encrypt(self, data, password):

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

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with open(os.devnull) as devnull:

179

try:

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

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

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attach_fhs={'stderr': devnull})

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

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f.write(data)

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

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ciphertext = f.read()

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proc.wait()

188

except IOError as e:

189

raise PGPError(e)

190

self.gnupg.passphrase = None

263

passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE,

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stderr=subprocess.PIPE)

275

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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278

return ciphertext

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279

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def decrypt(self, data, password):

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

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with open(os.devnull) as devnull:

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try:

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

198

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

199

attach_fhs={'stderr': devnull})

200

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

201

f.write(data)

202

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

203

decrypted_plaintext = f.read()

204

proc.wait()

205

except IOError as e:

206

raise PGPError(e)

207

self.gnupg.passphrase = None

281

passphrase = self.password_encode(password)

282

with tempfile.NamedTemporaryFile(

283

dir=self.tempdir) as passfile:

284

passfile.write(passphrase)

285

passfile.flush()

286

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

287

'--passphrase-file',

288

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)

293

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

294

if proc.returncode != 0:

295

raise PGPError(err)

208

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return decrypted_plaintext

209

297

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299

# Pretend that we have an Avahi module

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class avahi:

301

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

302

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

303

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"

307

DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"

308

DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

309

DBUS_PATH_SERVER = "/"

310

311

@staticmethod

312

def string_array_to_txt_array(t):

313

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

314

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

315

ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h

316

ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h

317

ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h

318

SERVER_INVALID = 0 # avahi-common/defs.h

319

SERVER_REGISTERING = 1 # avahi-common/defs.h

320

SERVER_RUNNING = 2 # avahi-common/defs.h

321

SERVER_COLLISION = 3 # avahi-common/defs.h

322

SERVER_FAILURE = 4 # avahi-common/defs.h

323

211

324

212

325

class AvahiError(Exception):

213

326

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

214

327

self.value = value

215

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

216

def __unicode__(self):

217

return unicode(repr(self.value))

328

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

329

**kwargs)

330

218

331

219

332

class AvahiServiceError(AvahiError):

220

333

pass

221

334

335

222

336

class AvahiGroupError(AvahiError):

223

337

pass

224

338

225

339

226

class AvahiService(object):

340

class AvahiService:

227

341

"""An Avahi (Zeroconf) service.

228

342

229

343

Attributes:

230

344

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

231

345

Used to optionally bind to the specified interface.

232

346

name: string; Example: 'Mandos'

233

347

type: string; Example: '_mandos._tcp'.

234

See <http://www.dns-sd.org/ServiceTypes.html>

348

See <https://www.iana.org/assignments/service-names-port-numbers>

235

349

port: integer; what port to announce

236

350

TXT: list of strings; TXT record for the service

237

351

domain: string; Domain to publish on, default to .local if empty.

243

357

server: D-Bus Server

244

358

bus: dbus.SystemBus()

245

359

"""

246

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

247

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

248

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

249

protocol = avahi.PROTO_UNSPEC, bus = None):

360

361

def __init__(self,

362

interface=avahi.IF_UNSPEC,

363

name=None,

364

servicetype=None,

365

port=None,

366

TXT=None,

367

domain="",

368

host="",

369

max_renames=32768,

370

protocol=avahi.PROTO_UNSPEC,

371

bus=None):

250

372

self.interface = interface

251

373

self.name = name

252

374

self.type = servicetype

261

383

self.server = None

262

384

self.bus = bus

263

385

self.entry_group_state_changed_match = None

264

def rename(self):

386

387

def rename(self, remove=True):

265

388

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

266

389

if self.rename_count >= self.max_renames:

267

390

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

268

391

" after %i retries, exiting.",

269

392

self.rename_count)

270

393

raise AvahiServiceError("Too many renames")

271

self.name = unicode(self.server

272

.GetAlternativeServiceName(self.name))

394

self.name = str(

395

self.server.GetAlternativeServiceName(self.name))

396

self.rename_count += 1

273

397

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

274

398

self.name)

275

self.remove()

399

if remove:

400

self.remove()

276

401

try:

277

402

self.add()

278

403

except dbus.exceptions.DBusException as error:

279

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

280

self.cleanup()

281

os._exit(1)

282

self.rename_count += 1

404

if (error.get_dbus_name()

405

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

406

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

407

return self.rename(remove=False)

408

else:

409

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

410

self.cleanup()

411

os._exit(1)

412

283

413

def remove(self):

284

414

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

285

415

if self.entry_group_state_changed_match is not None:

287

417

self.entry_group_state_changed_match = None

288

418

if self.group is not None:

289

419

self.group.Reset()

420

290

421

def add(self):

291

422

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

292

423

self.remove()

309

440

dbus.UInt16(self.port),

310

441

avahi.string_array_to_txt_array(self.TXT))

311

442

self.group.Commit()

443

312

444

def entry_group_state_changed(self, state, error):

313

445

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

314

446

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

315

447

316

448

if state == avahi.ENTRY_GROUP_ESTABLISHED:

317

449

logger.debug("Zeroconf service established.")

318

450

elif state == avahi.ENTRY_GROUP_COLLISION:

320

452

self.rename()

321

453

elif state == avahi.ENTRY_GROUP_FAILURE:

322

454

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

323

unicode(error))

324

raise AvahiGroupError("State changed: %s"

325

% unicode(error))

455

str(error))

456

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

457

326

458

def cleanup(self):

327

459

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

328

460

if self.group is not None:

333

465

pass

334

466

self.group = None

335

467

self.remove()

468

336

469

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

337

470

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

338

471

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

339

bad_states = { avahi.SERVER_INVALID:

340

"Zeroconf server invalid",

341

avahi.SERVER_REGISTERING: None,

342

avahi.SERVER_COLLISION:

343

"Zeroconf server name collision",

344

avahi.SERVER_FAILURE:

345

"Zeroconf server failure" }

472

bad_states = {

473

avahi.SERVER_INVALID: "Zeroconf server invalid",

474

avahi.SERVER_REGISTERING: None,

475

avahi.SERVER_COLLISION: "Zeroconf server name collision",

476

avahi.SERVER_FAILURE: "Zeroconf server failure",

477

}

346

478

if state in bad_states:

347

479

if bad_states[state] is not None:

348

480

if error is None:

351

483

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

352

484

self.cleanup()

353

485

elif state == avahi.SERVER_RUNNING:

354

self.add()

486

try:

487

self.add()

488

except dbus.exceptions.DBusException as error:

489

if (error.get_dbus_name()

490

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

491

logger.info("Local Zeroconf service name"

492

" collision.")

493

return self.rename(remove=False)

494

else:

495

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

496

self.cleanup()

497

os._exit(1)

355

498

else:

356

499

if error is None:

357

500

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

358

501

else:

359

502

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

503

360

504

def activate(self):

361

505

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

362

506

if self.server is None:

366

510

follow_name_owner_changes=True),

367

511

avahi.DBUS_INTERFACE_SERVER)

368

512

self.server.connect_to_signal("StateChanged",

369

self.server_state_changed)

513

self.server_state_changed)

370

514

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

371

515

516

372

517

class AvahiServiceToSyslog(AvahiService):

373

def rename(self):

518

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

374

519

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

375

ret = AvahiService.rename(self)

376

syslogger.setFormatter(logging.Formatter

377

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

378

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

379

% self.name))

520

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

521

syslogger.setFormatter(logging.Formatter(

522

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

523

.format(self.name)))

380

524

return ret

381

525

382

def timedelta_to_milliseconds(td):

383

"Convert a datetime.timedelta() to milliseconds"

384

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

385

+ (td.seconds * 1000)

386

+ (td.microseconds // 1000))

387

388

class Client(object):

526

527

# Pretend that we have a GnuTLS module

528

class gnutls:

529

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

530

531

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

532

if library is None:

533

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

534

_library = ctypes.cdll.LoadLibrary(library)

535

del library

536

537

# Unless otherwise indicated, the constants and types below are

538

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

539

540

# Constants

541

E_SUCCESS = 0

542

E_INTERRUPTED = -52

543

E_AGAIN = -28

544

CRT_OPENPGP = 2

545

CRT_RAWPK = 3

546

CLIENT = 2

547

SHUT_RDWR = 0

548

CRD_CERTIFICATE = 1

549

E_NO_CERTIFICATE_FOUND = -49

550

X509_FMT_DER = 0

551

NO_TICKETS = 1<<10

552

ENABLE_RAWPK = 1<<18

553

CTYPE_PEERS = 3

554

KEYID_USE_SHA256 = 1 # gnutls/x509.h

555

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

556

557

# Types

558

class session_int(ctypes.Structure):

559

_fields_ = []

560

session_t = ctypes.POINTER(session_int)

561

562

class certificate_credentials_st(ctypes.Structure):

563

_fields_ = []

564

certificate_credentials_t = ctypes.POINTER(

565

certificate_credentials_st)

566

certificate_type_t = ctypes.c_int

567

568

class datum_t(ctypes.Structure):

569

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

570

('size', ctypes.c_uint)]

571

572

class openpgp_crt_int(ctypes.Structure):

573

_fields_ = []

574

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

575

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

576

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

577

credentials_type_t = ctypes.c_int

578

transport_ptr_t = ctypes.c_void_p

579

close_request_t = ctypes.c_int

580

581

# Exceptions

582

class Error(Exception):

583

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

584

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

585

# code is passed, convert it to a string with

586

# gnutls.strerror()

587

self.code = code

588

if message is None and code is not None:

589

message = gnutls.strerror(code)

590

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

591

message, *args)

592

593

class CertificateSecurityError(Error):

594

pass

595

596

# Classes

597

class Credentials:

598

def __init__(self):

599

self._c_object = gnutls.certificate_credentials_t()

600

gnutls.certificate_allocate_credentials(

601

ctypes.byref(self._c_object))

602

self.type = gnutls.CRD_CERTIFICATE

603

604

def __del__(self):

605

gnutls.certificate_free_credentials(self._c_object)

606

607

class ClientSession:

608

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

609

self._c_object = gnutls.session_t()

610

gnutls_flags = gnutls.CLIENT

611

if gnutls.check_version(b"3.5.6"):

612

gnutls_flags |= gnutls.NO_TICKETS

613

if gnutls.has_rawpk:

614

gnutls_flags |= gnutls.ENABLE_RAWPK

615

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

616

del gnutls_flags

617

gnutls.set_default_priority(self._c_object)

618

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

619

gnutls.handshake_set_private_extensions(self._c_object,

620

True)

621

self.socket = socket

622

if credentials is None:

623

credentials = gnutls.Credentials()

624

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

625

ctypes.cast(credentials._c_object,

626

ctypes.c_void_p))

627

self.credentials = credentials

628

629

def __del__(self):

630

gnutls.deinit(self._c_object)

631

632

def handshake(self):

633

return gnutls.handshake(self._c_object)

634

635

def send(self, data):

636

data = bytes(data)

637

data_len = len(data)

638

while data_len > 0:

639

data_len -= gnutls.record_send(self._c_object,

640

data[-data_len:],

641

data_len)

642

643

def bye(self):

644

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

645

646

# Error handling functions

647

def _error_code(result):

648

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

649

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

650

if result >= 0:

651

return result

652

if result == gnutls.E_NO_CERTIFICATE_FOUND:

653

raise gnutls.CertificateSecurityError(code=result)

654

raise gnutls.Error(code=result)

655

656

def _retry_on_error(result, func, arguments):

657

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

658

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

659

while result < 0:

660

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

661

return _error_code(result)

662

result = func(*arguments)

663

return result

664

665

# Unless otherwise indicated, the function declarations below are

666

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

667

668

# Functions

669

priority_set_direct = _library.gnutls_priority_set_direct

670

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

671

ctypes.POINTER(ctypes.c_char_p)]

672

priority_set_direct.restype = _error_code

673

674

init = _library.gnutls_init

675

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

676

init.restype = _error_code

677

678

set_default_priority = _library.gnutls_set_default_priority

679

set_default_priority.argtypes = [session_t]

680

set_default_priority.restype = _error_code

681

682

record_send = _library.gnutls_record_send

683

record_send.argtypes = [session_t, ctypes.c_void_p,

684

ctypes.c_size_t]

685

record_send.restype = ctypes.c_ssize_t

686

record_send.errcheck = _retry_on_error

687

688

certificate_allocate_credentials = (

689

_library.gnutls_certificate_allocate_credentials)

690

certificate_allocate_credentials.argtypes = [

691

ctypes.POINTER(certificate_credentials_t)]

692

certificate_allocate_credentials.restype = _error_code

693

694

certificate_free_credentials = (

695

_library.gnutls_certificate_free_credentials)

696

certificate_free_credentials.argtypes = [

697

certificate_credentials_t]

698

certificate_free_credentials.restype = None

699

700

handshake_set_private_extensions = (

701

_library.gnutls_handshake_set_private_extensions)

702

handshake_set_private_extensions.argtypes = [session_t,

703

ctypes.c_int]

704

handshake_set_private_extensions.restype = None

705

706

credentials_set = _library.gnutls_credentials_set

707

credentials_set.argtypes = [session_t, credentials_type_t,

708

ctypes.c_void_p]

709

credentials_set.restype = _error_code

710

711

strerror = _library.gnutls_strerror

712

strerror.argtypes = [ctypes.c_int]

713

strerror.restype = ctypes.c_char_p

714

715

certificate_type_get = _library.gnutls_certificate_type_get

716

certificate_type_get.argtypes = [session_t]

717

certificate_type_get.restype = _error_code

718

719

certificate_get_peers = _library.gnutls_certificate_get_peers

720

certificate_get_peers.argtypes = [session_t,

721

ctypes.POINTER(ctypes.c_uint)]

722

certificate_get_peers.restype = ctypes.POINTER(datum_t)

723

724

global_set_log_level = _library.gnutls_global_set_log_level

725

global_set_log_level.argtypes = [ctypes.c_int]

726

global_set_log_level.restype = None

727

728

global_set_log_function = _library.gnutls_global_set_log_function

729

global_set_log_function.argtypes = [log_func]

730

global_set_log_function.restype = None

731

732

deinit = _library.gnutls_deinit

733

deinit.argtypes = [session_t]

734

deinit.restype = None

735

736

handshake = _library.gnutls_handshake

737

handshake.argtypes = [session_t]

738

handshake.restype = _error_code

739

handshake.errcheck = _retry_on_error

740

741

transport_set_ptr = _library.gnutls_transport_set_ptr

742

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

743

transport_set_ptr.restype = None

744

745

bye = _library.gnutls_bye

746

bye.argtypes = [session_t, close_request_t]

747

bye.restype = _error_code

748

bye.errcheck = _retry_on_error

749

750

check_version = _library.gnutls_check_version

751

check_version.argtypes = [ctypes.c_char_p]

752

check_version.restype = ctypes.c_char_p

753

754

_need_version = b"3.3.0"

755

if check_version(_need_version) is None:

756

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

757

.format(_need_version))

758

759

_tls_rawpk_version = b"3.6.6"

760

has_rawpk = bool(check_version(_tls_rawpk_version))

761

762

if has_rawpk:

763

# Types

764

class pubkey_st(ctypes.Structure):

765

_fields = []

766

pubkey_t = ctypes.POINTER(pubkey_st)

767

768

x509_crt_fmt_t = ctypes.c_int

769

770

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

771

pubkey_init = _library.gnutls_pubkey_init

772

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

773

pubkey_init.restype = _error_code

774

775

pubkey_import = _library.gnutls_pubkey_import

776

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

777

x509_crt_fmt_t]

778

pubkey_import.restype = _error_code

779

780

pubkey_get_key_id = _library.gnutls_pubkey_get_key_id

781

pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,

782

ctypes.POINTER(ctypes.c_ubyte),

783

ctypes.POINTER(ctypes.c_size_t)]

784

pubkey_get_key_id.restype = _error_code

785

786

pubkey_deinit = _library.gnutls_pubkey_deinit

787

pubkey_deinit.argtypes = [pubkey_t]

788

pubkey_deinit.restype = None

789

else:

790

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

791

792

openpgp_crt_init = _library.gnutls_openpgp_crt_init

793

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

794

openpgp_crt_init.restype = _error_code

795

796

openpgp_crt_import = _library.gnutls_openpgp_crt_import

797

openpgp_crt_import.argtypes = [openpgp_crt_t,

798

ctypes.POINTER(datum_t),

799

openpgp_crt_fmt_t]

800

openpgp_crt_import.restype = _error_code

801

802

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

803

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

804

ctypes.POINTER(ctypes.c_uint)]

805

openpgp_crt_verify_self.restype = _error_code

806

807

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

808

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

809

openpgp_crt_deinit.restype = None

810

811

openpgp_crt_get_fingerprint = (

812

_library.gnutls_openpgp_crt_get_fingerprint)

813

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

814

ctypes.c_void_p,

815

ctypes.POINTER(

816

ctypes.c_size_t)]

817

openpgp_crt_get_fingerprint.restype = _error_code

818

819

if check_version(b"3.6.4"):

820

certificate_type_get2 = _library.gnutls_certificate_type_get2

821

certificate_type_get2.argtypes = [session_t, ctypes.c_int]

822

certificate_type_get2.restype = _error_code

823

824

# Remove non-public functions

825

del _error_code, _retry_on_error

826

827

828

def call_pipe(connection, # : multiprocessing.Connection

829

func, *args, **kwargs):

830

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

831

832

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

833

return value on the provided multiprocessing.Connection.

834

"""

835

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

836

connection.close()

837

838

839

class Client:

389

840

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

390

841

391

842

Attributes:

392

843

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

393

844

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

394

845

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

395

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

396

to see if the client lives.

397

'None' if no process is running.

398

checker_callback_tag: a gobject event source tag, or None

846

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

847

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

848

running.

849

checker_callback_tag: a GLib event source tag, or None

399

850

checker_command: string; External command which is run to check

400

851

if client lives. %() expansions are done at

401

852

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

402

853

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

403

checker_initiator_tag: a gobject event source tag, or None

854

checker_initiator_tag: a GLib event source tag, or None

404

855

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

405

856

client_structure: Object describing what attributes a client has

406

857

and is used for storing the client at exit

407

858

current_checker_command: string; current running checker_command

408

disable_initiator_tag: a gobject event source tag, or None

859

disable_initiator_tag: a GLib event source tag, or None

409

860

enabled: bool()

410

861

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

411

uniquely identify the client

862

uniquely identify an OpenPGP client

863

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

864

a client using raw public keys

412

865

host: string; available for use by the checker command

413

866

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

414

867

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

415

868

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

416

869

last_checker_status: integer between 0 and 255 reflecting exit

417

870

status of last checker. -1 reflects crashed

418

checker, or None.

871

checker, -2 means no checker completed yet.

872

last_checker_signal: The signal which killed the last checker, if

873

last_checker_status is -1

419

874

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

420

875

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

421

876

D-Bus identifiers

426

881

runtime_expansions: Allowed attributes for runtime expansion.

427

882

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

428

883

disabled, or None

884

server_settings: The server_settings dict from main()

429

885

"""

430

886

431

887

runtime_expansions = ("approval_delay", "approval_duration",

432

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

433

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

888

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

889

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

890

"last_approval_request", "last_checked_ok",

434

891

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

435

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

436

"extended_timeout": "15m",

437

"interval": "2m",

438

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

439

"host": "",

440

"approval_delay": "0s",

441

"approval_duration": "1s",

442

"approved_by_default": "True",

443

"enabled": "True",

444

}

445

446

def timeout_milliseconds(self):

447

"Return the 'timeout' attribute in milliseconds"

448

return timedelta_to_milliseconds(self.timeout)

449

450

def extended_timeout_milliseconds(self):

451

"Return the 'extended_timeout' attribute in milliseconds"

452

return timedelta_to_milliseconds(self.extended_timeout)

453

454

def interval_milliseconds(self):

455

"Return the 'interval' attribute in milliseconds"

456

return timedelta_to_milliseconds(self.interval)

457

458

def approval_delay_milliseconds(self):

459

return timedelta_to_milliseconds(self.approval_delay)

892

client_defaults = {

893

"timeout": "PT5M",

894

"extended_timeout": "PT15M",

895

"interval": "PT2M",

896

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

897

"host": "",

898

"approval_delay": "PT0S",

899

"approval_duration": "PT1S",

900

"approved_by_default": "True",

901

"enabled": "True",

902

}

460

903

461

904

@staticmethod

462

905

def config_parser(config):

470

913

for client_name in config.sections():

471

914

section = dict(config.items(client_name))

472

915

client = settings[client_name] = {}

473

916

474

917

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

475

918

# Reformat values from string types to Python types

476

919

client["approved_by_default"] = config.getboolean(

477

920

client_name, "approved_by_default")

478

921

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

479

922

"enabled")

480

923

924

# Uppercase and remove spaces from key_id and fingerprint

925

# for later comparison purposes with return value from the

926

# key_id() and fingerprint() functions

927

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

928

.replace(" ", ""))

481

929

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

482

930

.replace(" ", ""))

483

931

if "secret" in section:

484

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

932

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

933

.encode("utf-8"),

934

"base64")

485

935

elif "secfile" in section:

486

936

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

487

937

(section["secfile"])),

488

938

"rb") as secfile:

489

939

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

490

940

else:

491

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

492

% section)

941

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

942

.format(section))

493

943

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

494

944

client["extended_timeout"] = string_to_delta(

495

945

section["extended_timeout"])

501

951

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

502

952

client["last_approval_request"] = None

503

953

client["last_checked_ok"] = None

504

client["last_checker_status"] = None

505

954

client["last_checker_status"] = -2

955

506

956

return settings

507

508

509

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

510

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

511

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

512

attribute."""

957

958

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

513

959

self.name = name

960

if server_settings is None:

961

server_settings = {}

962

self.server_settings = server_settings

514

963

# adding all client settings

515

for setting, value in settings.iteritems():

964

for setting, value in settings.items():

516

965

setattr(self, setting, value)

517

966

518

967

if self.enabled:

519

968

if not hasattr(self, "last_enabled"):

520

969

self.last_enabled = datetime.datetime.utcnow()

524

973

else:

525

974

self.last_enabled = None

526

975

self.expires = None

527

976

528

977

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

529

# Uppercase and remove spaces from fingerprint for later

530

# comparison purposes with return value from the fingerprint()

531

# function

978

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

532

979

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

533

980

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

534

981

datetime.datetime.utcnow())

541

988

self.current_checker_command = None

542

989

self.approved = None

543

990

self.approvals_pending = 0

544

self.changedstate = (multiprocessing_manager

545

.Condition(multiprocessing_manager

546

.Lock()))

547

self.client_structure = [attr for attr in

548

self.__dict__.iterkeys()

991

self.changedstate = multiprocessing_manager.Condition(

992

multiprocessing_manager.Lock())

993

self.client_structure = [attr

994

for attr in self.__dict__.keys()

549

995

if not attr.startswith("_")]

550

996

self.client_structure.append("client_structure")

551

552

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

553

lambda obj:

554

isinstance(obj,

555

property)):

997

998

for name, t in inspect.getmembers(

999

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

556

1000

if not name.startswith("_"):

557

1001

self.client_structure.append(name)

558

1002

559

1003

# Send notice to process children that client state has changed

560

1004

def send_changedstate(self):

561

1005

with self.changedstate:

562

1006

self.changedstate.notify_all()

563

1007

564

1008

def enable(self):

565

1009

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

566

1010

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

567

1011

# Already enabled

568

1012

return

569

self.send_changedstate()

570

1013

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

571

1014

self.enabled = True

572

1015

self.last_enabled = datetime.datetime.utcnow()

573

1016

self.init_checker()

574

1017

self.send_changedstate()

1018

575

1019

def disable(self, quiet=True):

576

1020

"""Disable this client."""

577

1021

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

578

1022

return False

579

1023

if not quiet:

580

self.send_changedstate()

581

if not quiet:

582

1024

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

583

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

584

gobject.source_remove(self.disable_initiator_tag)

1025

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

1026

GLib.source_remove(self.disable_initiator_tag)

585

1027

self.disable_initiator_tag = None

586

1028

self.expires = None

587

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

588

gobject.source_remove(self.checker_initiator_tag)

1029

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

1030

GLib.source_remove(self.checker_initiator_tag)

589

1031

self.checker_initiator_tag = None

590

1032

self.stop_checker()

591

1033

self.enabled = False

592

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

1034

if not quiet:

1035

self.send_changedstate()

1036

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

593

1037

return False

594

1038

595

1039

def __del__(self):

596

1040

self.disable()

597

1041

598

1042

def init_checker(self):

599

1043

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

600

1044

# and every interval from then on.

601

self.checker_initiator_tag = (gobject.timeout_add

602

(self.interval_milliseconds(),

603

self.start_checker))

1045

if self.checker_initiator_tag is not None:

1046

GLib.source_remove(self.checker_initiator_tag)

1047

self.checker_initiator_tag = GLib.timeout_add(

1048

random.randrange(int(self.interval.total_seconds() * 1000

1049

+ 1)),

1050

self.start_checker)

604

1051

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

605

self.disable_initiator_tag = (gobject.timeout_add

606

(self.timeout_milliseconds(),

607

self.disable))

1052

if self.disable_initiator_tag is not None:

1053

GLib.source_remove(self.disable_initiator_tag)

1054

self.disable_initiator_tag = GLib.timeout_add(

1055

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

608

1056

# Also start a new checker *right now*.

609

1057

self.start_checker()

610

611

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

1058

1059

def checker_callback(self, source, condition, connection,

1060

command):

612

1061

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

1062

# Read return code from connection (see call_pipe)

1063

returncode = connection.recv()

1064

connection.close()

1065

if self.checker is not None:

1066

self.checker.join()

613

1067

self.checker_callback_tag = None

614

1068

self.checker = None

615

if os.WIFEXITED(condition):

616

self.last_checker_status = os.WEXITSTATUS(condition)

1069

1070

if returncode >= 0:

1071

self.last_checker_status = returncode

1072

self.last_checker_signal = None

617

1073

if self.last_checker_status == 0:

618

1074

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

619

1075

vars(self))

620

1076

self.checked_ok()

621

1077

else:

622

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

623

vars(self))

1078

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

624

1079

else:

625

1080

self.last_checker_status = -1

1081

self.last_checker_signal = -returncode

626

1082

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

627

1083

vars(self))

628

629

def checked_ok(self, timeout=None):

630

"""Bump up the timeout for this client.

631

632

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

633

alive and well.

634

"""

1084

return False

1085

1086

def checked_ok(self):

1087

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

1088

self.last_checked_ok = datetime.datetime.utcnow()

1089

self.last_checker_status = 0

1090

self.last_checker_signal = None

1091

self.bump_timeout()

1092

1093

def bump_timeout(self, timeout=None):

1094

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

635

1095

if timeout is None:

636

1096

timeout = self.timeout

637

self.last_checked_ok = datetime.datetime.utcnow()

638

1097

if self.disable_initiator_tag is not None:

639

gobject.source_remove(self.disable_initiator_tag)

1098

GLib.source_remove(self.disable_initiator_tag)

1099

self.disable_initiator_tag = None

640

1100

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

641

self.disable_initiator_tag = (gobject.timeout_add

642

(timedelta_to_milliseconds

643

(timeout), self.disable))

1101

self.disable_initiator_tag = GLib.timeout_add(

1102

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

644

1103

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

645

1104

646

1105

def need_approval(self):

647

1106

self.last_approval_request = datetime.datetime.utcnow()

648

1107

649

1108

def start_checker(self):

650

1109

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

651

1110

652

1111

If a checker already exists, leave it running and do

653

1112

nothing."""

654

1113

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

655

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

656

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

657

# client would inevitably timeout, since no checker would get

658

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

1114

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

1115

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

1116

# would inevitably timeout, since no checker would get a

1117

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

659

1118

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

660

1119

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

661

1120

# should be.

662

663

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

664

try:

665

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

666

except (AttributeError, OSError) as error:

667

if (isinstance(error, OSError)

668

and error.errno != errno.ECHILD):

669

raise error

670

else:

671

if pid:

672

logger.warning("Checker was a zombie")

673

gobject.source_remove(self.checker_callback_tag)

674

self.checker_callback(pid, status,

675

self.current_checker_command)

1121

1122

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

1123

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

1124

self.checker.join()

1125

self.checker = None

676

1126

# Start a new checker if needed

677

1127

if self.checker is None:

1128

# Escape attributes for the shell

1129

escaped_attrs = {

1130

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

1131

for attr in self.runtime_expansions}

678

1132

try:

679

# In case checker_command has exactly one % operator

680

command = self.checker_command % self.host

681

except TypeError:

682

# Escape attributes for the shell

683

escaped_attrs = dict(

684

(attr,

685

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

686

errors=

687

'replace')))

688

for attr in

689

self.runtime_expansions)

690

691

try:

692

command = self.checker_command % escaped_attrs

693

except TypeError as error:

694

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

695

' %s', self.checker_command, error)

696

return True # Try again later

1133

command = self.checker_command % escaped_attrs

1134

except TypeError as error:

1135

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

1136

self.checker_command,

1137

exc_info=error)

1138

return True # Try again later

697

1139

self.current_checker_command = command

698

try:

699

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

700

command, self.name)

701

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

702

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

703

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

704

# always replaced by /dev/null.)

705

self.checker = subprocess.Popen(command,

706

close_fds=True,

707

shell=True, cwd="/")

708

self.checker_callback_tag = (gobject.child_watch_add

709

(self.checker.pid,

710

self.checker_callback,

711

data=command))

712

# The checker may have completed before the gobject

713

# watch was added. Check for this.

714

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

715

if pid:

716

gobject.source_remove(self.checker_callback_tag)

717

self.checker_callback(pid, status, command)

718

except OSError as error:

719

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

720

error)

721

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

1140

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

1141

self.name)

1142

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

1143

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

1144

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

1145

# always replaced by /dev/null.)

1146

# The exception is when not debugging but nevertheless

1147

# running in the foreground; use the previously

1148

# created wnull.

1149

popen_args = {"close_fds": True,

1150

"shell": True,

1151

"cwd": "/"}

1152

if (not self.server_settings["debug"]

1153

and self.server_settings["foreground"]):

1154

popen_args.update({"stdout": wnull,

1155

"stderr": wnull})

1156

pipe = multiprocessing.Pipe(duplex=False)

1157

self.checker = multiprocessing.Process(

1158

target=call_pipe,

1159

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

1160

kwargs=popen_args)

1161

self.checker.start()

1162

self.checker_callback_tag = GLib.io_add_watch(

1163

GLib.IOChannel.unix_new(pipe[0].fileno()),

1164

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

1165

self.checker_callback, pipe[0], command)

1166

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

722

1167

return True

723

1168

724

1169

def stop_checker(self):

725

1170

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

726

1171

if self.checker_callback_tag:

727

gobject.source_remove(self.checker_callback_tag)

1172

GLib.source_remove(self.checker_callback_tag)

728

1173

self.checker_callback_tag = None

729

1174

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

730

1175

return

731

1176

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

732

try:

733

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

734

#time.sleep(0.5)

735

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

736

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

737

except OSError as error:

738

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

739

raise

1177

self.checker.terminate()

740

1178

self.checker = None

741

1179

742

1180

743

def dbus_service_property(dbus_interface, signature="v",

744

access="readwrite", byte_arrays=False):

1181

def dbus_service_property(dbus_interface,

1182

signature="v",

1183

access="readwrite",

1184

byte_arrays=False):

745

1185

"""Decorators for marking methods of a DBusObjectWithProperties to

746

1186

become properties on the D-Bus.

747

1187

748

1188

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

749

1189

and with one argument by "Set".

750

1190

751

1191

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

752

1192

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

753

1193

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

756

1196

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

757

1197

if byte_arrays and signature != "ay":

758

1198

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

759

" signature %r" % signature)

1199

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

1200

760

1201

def decorator(func):

761

1202

func._dbus_is_property = True

762

1203

func._dbus_interface = dbus_interface

765

1206

func._dbus_name = func.__name__

766

1207

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

767

1208

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

768

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

769

return func

1209

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

1210

return func

1211

1212

return decorator

1213

1214

1215

def dbus_interface_annotations(dbus_interface):

1216

"""Decorator for marking functions returning interface annotations

1217

1218

Usage:

1219

1220

@dbus_interface_annotations("org.example.Interface")

1221

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

1222

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

1223

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

1224

"false"}

1225

"""

1226

1227

def decorator(func):

1228

func._dbus_is_interface = True

1229

func._dbus_interface = dbus_interface

1230

func._dbus_name = dbus_interface

1231

return func

1232

1233

return decorator

1234

1235

1236

def dbus_annotations(annotations):

1237

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

1238

Usage:

1239

1240

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

1241

"org.freedesktop.DBus.Property."

1242

"EmitsChangedSignal": "false"})

1243

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

1244

access="r")

1245

def Property_dbus_property(self):

1246

return dbus.Boolean(False)

1247

1248

See also the DBusObjectWithAnnotations class.

1249

"""

1250

1251

def decorator(func):

1252

func._dbus_annotations = annotations

1253

return func

1254

770

1255

return decorator

771

1256

772

1257

773

1258

class DBusPropertyException(dbus.exceptions.DBusException):

774

1259

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

775

1260

"""

776

def __unicode__(self):

777

return unicode(str(self))

1261

pass

778

1262

779

1263

780

1264

class DBusPropertyAccessException(DBusPropertyException):

789

1273

pass

790

1274

791

1275

792

class DBusObjectWithProperties(dbus.service.Object):

1276

class DBusObjectWithAnnotations(dbus.service.Object):

1277

"""A D-Bus object with annotations.

1278

1279

Classes inheriting from this can use the dbus_annotations

1280

decorator to add annotations to methods or signals.

1281

"""

1282

1283

@staticmethod

1284

def _is_dbus_thing(thing):

1285

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

1286

1287

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

1288

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

1289

"""

1290

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

1291

False)

1292

1293

def _get_all_dbus_things(self, thing):

1294

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

1295

"""

1296

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

1297

athing.__get__(self))

1298

for cls in self.__class__.__mro__

1299

for name, athing in

1300

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

1301

1302

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1303

out_signature="s",

1304

path_keyword='object_path',

1305

connection_keyword='connection')

1306

def Introspect(self, object_path, connection):

1307

"""Overloading of standard D-Bus method.

1308

1309

Inserts annotation tags on methods and signals.

1310

"""

1311

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

1312

connection)

1313

try:

1314

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

1315

1316

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

1317

# Add annotation tags

1318

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

1319

for tag in if_tag.getElementsByTagName(typ):

1320

annots = dict()

1321

for name, prop in (self.

1322

_get_all_dbus_things(typ)):

1323

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

1324

and prop._dbus_interface

1325

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

1326

annots.update(getattr(

1327

prop, "_dbus_annotations", {}))

1328

for name, value in annots.items():

1329

ann_tag = document.createElement(

1330

"annotation")

1331

ann_tag.setAttribute("name", name)

1332

ann_tag.setAttribute("value", value)

1333

tag.appendChild(ann_tag)

1334

# Add interface annotation tags

1335

for annotation, value in dict(

1336

itertools.chain.from_iterable(

1337

annotations().items()

1338

for name, annotations

1339

in self._get_all_dbus_things("interface")

1340

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

1341

)).items():

1342

ann_tag = document.createElement("annotation")

1343

ann_tag.setAttribute("name", annotation)

1344

ann_tag.setAttribute("value", value)

1345

if_tag.appendChild(ann_tag)

1346

# Fix argument name for the Introspect method itself

1347

if (if_tag.getAttribute("name")

1348

== dbus.INTROSPECTABLE_IFACE):

1349

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

1350

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

1351

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

1352

if (arg.getAttribute("direction")

1353

== "out"):

1354

arg.setAttribute("name",

1355

"xml_data")

1356

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

1357

document.unlink()

1358

except (AttributeError, xml.dom.DOMException,

1359

xml.parsers.expat.ExpatError) as error:

1360

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

1361

exc_info=error)

1362

return xmlstring

1363

1364

1365

class DBusObjectWithProperties(DBusObjectWithAnnotations):

793

1366

"""A D-Bus object with properties.

794

1367

795

1368

Classes inheriting from this can use the dbus_service_property

796

1369

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

797

1370

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

798

1371

"""

799

800

@staticmethod

801

def _is_dbus_property(obj):

802

return getattr(obj, "_dbus_is_property", False)

803

804

def _get_all_dbus_properties(self):

805

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

806

"""

807

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

808

for cls in self.__class__.__mro__

809

for name, prop in

810

inspect.getmembers(cls, self._is_dbus_property))

811

1372

812

1373

def _get_dbus_property(self, interface_name, property_name):

813

1374

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

814

1375

property with the specified name and interface.

815

1376

"""

816

for cls in self.__class__.__mro__:

817

for name, value in (inspect.getmembers

818

(cls, self._is_dbus_property)):

1377

for cls in self.__class__.__mro__:

1378

for name, value in inspect.getmembers(

1379

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

819

1380

if (value._dbus_name == property_name

820

1381

and value._dbus_interface == interface_name):

821

1382

return value.__get__(self)

822

1383

823

1384

# No such property

824

raise DBusPropertyNotFound(self.dbus_object_path + ":"

825

+ interface_name + "."

826

+ property_name)

827

828

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

1385

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

1386

self.dbus_object_path, interface_name, property_name))

1387

1388

@classmethod

1389

def _get_all_interface_names(cls):

1390

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

1391

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

1392

"_dbus_interface", None)

1393

for x in (inspect.getmro(cls))

1394

for attr in dir(x))

1395

if name is not None)

1396

1397

@dbus.service.method(dbus.PROPERTIES_IFACE,

1398

in_signature="ss",

829

1399

out_signature="v")

830

1400

def Get(self, interface_name, property_name):

831

1401

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

837

1407

if not hasattr(value, "variant_level"):

838

1408

return value

839

1409

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

840

1410

841

1411

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

842

1412

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

843

1413

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

849

1419

# The byte_arrays option is not supported yet on

850

1420

# signatures other than "ay".

851

1421

if prop._dbus_signature != "ay":

852

raise ValueError

853

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

854

for byte in value))

1422

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

1423

"'ay' signature {!r}"

1424

.format(prop._dbus_signature))

1425

value = dbus.ByteArray(bytes(value))

855

1426

prop(value)

856

857

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

1427

1428

@dbus.service.method(dbus.PROPERTIES_IFACE,

1429

in_signature="s",

858

1430

out_signature="a{sv}")

859

1431

def GetAll(self, interface_name):

860

1432

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

861

1433

standard.

862

1434

863

1435

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

864

1436

"""

865

1437

properties = {}

866

for name, prop in self._get_all_dbus_properties():

1438

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

867

1439

if (interface_name

868

1440

and interface_name != prop._dbus_interface):

869

1441

# Interface non-empty but did not match

875

1447

if not hasattr(value, "variant_level"):

876

1448

properties[name] = value

877

1449

continue

878

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

879

value.variant_level+1)

1450

properties[name] = type(value)(

1451

value, variant_level=value.variant_level + 1)

880

1452

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

881

1453

1454

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

1455

def PropertiesChanged(self, interface_name, changed_properties,

1456

invalidated_properties):

1457

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

1458

standard.

1459

"""

1460

pass

1461

882

1462

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

883

1463

out_signature="s",

884

1464

path_keyword='object_path',

885

1465

connection_keyword='connection')

886

1466

def Introspect(self, object_path, connection):

887

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

1467

"""Overloading of standard D-Bus method.

1468

1469

Inserts property tags and interface annotation tags.

888

1470

"""

889

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

890

connection)

1471

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1472

object_path,

1473

connection)

891

1474

try:

892

1475

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

1476

893

1477

def make_tag(document, name, prop):

894

1478

e = document.createElement("property")

895

1479

e.setAttribute("name", name)

896

1480

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

897

1481

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

898

1482

return e

1483

899

1484

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

1485

# Add property tags

900

1486

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

901

1487

for name, prop

902

in self._get_all_dbus_properties()

1488

in self._get_all_dbus_things("property")

903

1489

if prop._dbus_interface

904

1490

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

905

1491

if_tag.appendChild(tag)

1492

# Add annotation tags for properties

1493

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

1494

annots = dict()

1495

for name, prop in self._get_all_dbus_things(

1496

"property"):

1497

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

1498

and prop._dbus_interface

1499

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

1500

annots.update(getattr(

1501

prop, "_dbus_annotations", {}))

1502

for name, value in annots.items():

1503

ann_tag = document.createElement(

1504

"annotation")

1505

ann_tag.setAttribute("name", name)

1506

ann_tag.setAttribute("value", value)

1507

tag.appendChild(ann_tag)

906

1508

# Add the names to the return values for the

907

1509

# "org.freedesktop.DBus.Properties" methods

908

1510

if (if_tag.getAttribute("name")

923

1525

except (AttributeError, xml.dom.DOMException,

924

1526

xml.parsers.expat.ExpatError) as error:

925

1527

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

926

error)

927

return xmlstring

928

929

930

def datetime_to_dbus (dt, variant_level=0):

1528

exc_info=error)

1529

return xmlstring

1530

1531

1532

try:

1533

dbus.OBJECT_MANAGER_IFACE

1534

except AttributeError:

1535

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

1536

1537

1538

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1539

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

1540

1541

Classes inheriting from this exposes the standard

1542

GetManagedObjects call and the InterfacesAdded and

1543

InterfacesRemoved signals on the standard

1544

"org.freedesktop.DBus.ObjectManager" interface.

1545

1546

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

1547

manually.

1548

"""

1549

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1550

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

1551

def GetManagedObjects(self):

1552

"""This function must be overridden"""

1553

raise NotImplementedError()

1554

1555

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1556

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

1557

def InterfacesAdded(self, object_path, interfaces_and_properties):

1558

pass

1559

1560

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

1561

def InterfacesRemoved(self, object_path, interfaces):

1562

pass

1563

1564

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1565

out_signature="s",

1566

path_keyword='object_path',

1567

connection_keyword='connection')

1568

def Introspect(self, object_path, connection):

1569

"""Overloading of standard D-Bus method.

1570

1571

Override return argument name of GetManagedObjects to be

1572

"objpath_interfaces_and_properties"

1573

"""

1574

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1575

object_path,

1576

connection)

1577

try:

1578

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

1579

1580

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

1581

# Fix argument name for the GetManagedObjects method

1582

if (if_tag.getAttribute("name")

1583

== dbus.OBJECT_MANAGER_IFACE):

1584

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

1585

if (cn.getAttribute("name")

1586

== "GetManagedObjects"):

1587

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

1588

if (arg.getAttribute("direction")

1589

== "out"):

1590

arg.setAttribute(

1591

"name",

1592

"objpath_interfaces"

1593

"_and_properties")

1594

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

1595

document.unlink()

1596

except (AttributeError, xml.dom.DOMException,

1597

xml.parsers.expat.ExpatError) as error:

1598

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

1599

exc_info=error)

1600

return xmlstring

1601

1602

1603

def datetime_to_dbus(dt, variant_level=0):

931

1604

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

932

1605

if dt is None:

933

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

934

return dbus.String(dt.isoformat(),

935

variant_level=variant_level)

936

937

938

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

939

.__metaclass__):

940

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

941

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

1606

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

1607

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

1608

1609

1610

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1611

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

1612

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

1613

interface names according to the "alt_interface_names" mapping.

1614

Usage:

1615

1616

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

1617

"net.example.AlternateInterface"})

1618

class SampleDBusObject(dbus.service.Object):

1619

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

1620

def SampleDBusMethod():

1621

pass

1622

1623

The above "SampleDBusMethod" on "SampleDBusObject" will be

1624

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

1625

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

1626

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

1627

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

1628

1629

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

1630

(from DBusObjectWithProperties) and interfaces (from the

1631

dbus_interface_annotations decorator).

942

1632

"""

943

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

944

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

945

# methods, signals, or properties in them

946

for base in (b for b in bases

947

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

948

# Go though all attributes of the base class

949

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

1633

1634

def wrapper(cls):

1635

for orig_interface_name, alt_interface_name in (

1636

alt_interface_names.items()):

1637

attr = {}

1638

interface_names = set()

1639

# Go though all attributes of the class

1640

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

950

1641

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

951

1642

# with the wrong interface name

952

1643

if (not hasattr(attribute, "_dbus_interface")

953

or not attribute._dbus_interface

954

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

1644

or not attribute._dbus_interface.startswith(

1645

orig_interface_name)):

955

1646

continue

956

1647

# Create an alternate D-Bus interface name based on

957

1648

# the current name

958

alt_interface = (attribute._dbus_interface

959

.replace("se.recompile.Mandos",

960

"se.bsnet.fukt.Mandos"))

1649

alt_interface = attribute._dbus_interface.replace(

1650

orig_interface_name, alt_interface_name)

1651

interface_names.add(alt_interface)

961

1652

# Is this a D-Bus signal?

962

1653

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

963

# Extract the original non-method function by

964

# black magic

965

nonmethod_func = (dict(

1654

# Extract the original non-method undecorated

1655

# function by black magic

1656

if sys.version_info.major == 2:

1657

nonmethod_func = (dict(

966

1658

zip(attribute.func_code.co_freevars,

967

attribute.__closure__))["func"]

968

.cell_contents)

1659

attribute.__closure__))

1660

["func"].cell_contents)

1661

else:

1662

nonmethod_func = (dict(

1663

zip(attribute.__code__.co_freevars,

1664

attribute.__closure__))

1665

["func"].cell_contents)

969

1666

# Create a new, but exactly alike, function

970

1667

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

971

1668

# with the alternate D-Bus interface name

972

new_function = (dbus.service.signal

973

(alt_interface,

974

attribute._dbus_signature)

975

(types.FunctionType(

976

nonmethod_func.func_code,

977

nonmethod_func.func_globals,

978

nonmethod_func.func_name,

979

nonmethod_func.func_defaults,

980

nonmethod_func.func_closure)))

1669

new_function = copy_function(nonmethod_func)

1670

new_function = (dbus.service.signal(

1671

alt_interface,

1672

attribute._dbus_signature)(new_function))

1673

# Copy annotations, if any

1674

try:

1675

new_function._dbus_annotations = dict(

1676

attribute._dbus_annotations)

1677

except AttributeError:

1678

pass

1679

981

1680

# Define a creator of a function to call both the

982

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

983

# signals gets sent when the function is called

1681

# original and alternate functions, so both the

1682

# original and alternate signals gets sent when

1683

# the function is called

984

1684

def fixscope(func1, func2):

985

1685

"""This function is a scope container to pass

986

1686

func1 and func2 to the "call_both" function

987

1687

outside of its arguments"""

1688

1689

@functools.wraps(func2)

988

1690

def call_both(*args, **kwargs):

989

1691

"""This function will emit two D-Bus

990

1692

signals by calling func1 and func2"""

991

1693

func1(*args, **kwargs)

992

1694

func2(*args, **kwargs)

1695

# Make wrapper function look like a D-Bus

1696

# signal

1697

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

1698

if name.startswith("_dbus_"):

1699

setattr(call_both, name, attr)

1700

993

1701

return call_both

994

1702

# Create the "call_both" function and add it to

995

1703

# the class

996

attr[attrname] = fixscope(attribute,

997

new_function)

1704

attr[attrname] = fixscope(attribute, new_function)

998

1705

# Is this a D-Bus method?

999

1706

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

1000

1707

# Create a new, but exactly alike, function

1001

1708

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

1002

1709

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

1003

1710

# to the class.

1004

attr[attrname] = (dbus.service.method

1005

(alt_interface,

1006

attribute._dbus_in_signature,

1007

attribute._dbus_out_signature)

1008

(types.FunctionType

1009

(attribute.func_code,

1010

attribute.func_globals,

1011

attribute.func_name,

1012

attribute.func_defaults,

1013

attribute.func_closure)))

1711

attr[attrname] = (

1712

dbus.service.method(

1713

alt_interface,

1714

attribute._dbus_in_signature,

1715

attribute._dbus_out_signature)

1716

(copy_function(attribute)))

1717

# Copy annotations, if any

1718

try:

1719

attr[attrname]._dbus_annotations = dict(

1720

attribute._dbus_annotations)

1721

except AttributeError:

1722

pass

1014

1723

# Is this a D-Bus property?

1015

1724

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

1016

1725

# Create a new, but exactly alike, function

1017

1726

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

1018

1727

# property with the alternate D-Bus interface

1019

1728

# name. Add it to the class.

1020

attr[attrname] = (dbus_service_property

1021

(alt_interface,

1022

attribute._dbus_signature,

1023

attribute._dbus_access,

1024

attribute

1025

._dbus_get_args_options

1026

["byte_arrays"])

1027

(types.FunctionType

1028

(attribute.func_code,

1029

attribute.func_globals,

1030

attribute.func_name,

1031

attribute.func_defaults,

1032

attribute.func_closure)))

1033

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

1034

1035

1729

attr[attrname] = (dbus_service_property(

1730

alt_interface, attribute._dbus_signature,

1731

attribute._dbus_access,

1732

attribute._dbus_get_args_options

1733

["byte_arrays"])

1734

(copy_function(attribute)))

1735

# Copy annotations, if any

1736

try:

1737

attr[attrname]._dbus_annotations = dict(

1738

attribute._dbus_annotations)

1739

except AttributeError:

1740

pass

1741

# Is this a D-Bus interface?

1742

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

1743

# Create a new, but exactly alike, function

1744

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

1745

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

1746

# to the class.

1747

attr[attrname] = (

1748

dbus_interface_annotations(alt_interface)

1749

(copy_function(attribute)))

1750

if deprecate:

1751

# Deprecate all alternate interfaces

1752

iname = "_AlternateDBusNames_interface_annotation{}"

1753

for interface_name in interface_names:

1754

1755

@dbus_interface_annotations(interface_name)

1756

def func(self):

1757

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

1758

"true"}

1759

# Find an unused name

1760

for aname in (iname.format(i)

1761

for i in itertools.count()):

1762

if aname not in attr:

1763

attr[aname] = func

1764

break

1765

if interface_names:

1766

# Replace the class with a new subclass of it with

1767

# methods, signals, etc. as created above.

1768

if sys.version_info.major == 2:

1769

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

1770

(cls, ), attr)

1771

else:

1772

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

1773

(cls, ), attr)

1774

return cls

1775

1776

return wrapper

1777

1778

1779

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

1780

"se.bsnet.fukt.Mandos"})

1036

1781

class ClientDBus(Client, DBusObjectWithProperties):

1037

1782

"""A Client class using D-Bus

1038

1783

1039

1784

Attributes:

1040

1785

dbus_object_path: dbus.ObjectPath

1041

1786

bus: dbus.SystemBus()

1042

1787

"""

1043

1788

1044

1789

runtime_expansions = (Client.runtime_expansions

1045

+ ("dbus_object_path",))

1046

1790

+ ("dbus_object_path", ))

1791

1792

_interface = "se.recompile.Mandos.Client"

1793

1047

1794

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

1048

1049

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

1795

1796

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

1050

1797

self.bus = bus

1051

1798

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

1052

1799

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

1053

1800

# the D-Bus

1054

client_object_name = unicode(self.name).translate(

1801

client_object_name = str(self.name).translate(

1055

1802

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

1056

1803

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

1057

self.dbus_object_path = (dbus.ObjectPath

1058

("/clients/" + client_object_name))

1804

self.dbus_object_path = dbus.ObjectPath(

1805

"/clients/" + client_object_name)

1059

1806

DBusObjectWithProperties.__init__(self, self.bus,

1060

1807

self.dbus_object_path)

1061

1062

def notifychangeproperty(transform_func,

1063

dbus_name, type_func=lambda x: x,

1064

variant_level=1):

1808

1809

def notifychangeproperty(transform_func, dbus_name,

1810

type_func=lambda x: x,

1811

variant_level=1,

1812

invalidate_only=False,

1813

_interface=_interface):

1065

1814

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

1066

1815

its changes to DBus.

1067

1816

1068

1817

transform_fun: Function that takes a value and a variant_level

1069

1818

and transforms it to a D-Bus type.

1070

1819

dbus_name: D-Bus name of the variable

1072

1821

to the D-Bus. Default: no transform

1073

1822

variant_level: D-Bus variant level. Default: 1

1074

1823

"""

1075

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

1824

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

1825

1076

1826

def setter(self, value):

1077

1827

if hasattr(self, "dbus_object_path"):

1078

1828

if (not hasattr(self, attrname) or

1079

1829

type_func(getattr(self, attrname, None))

1080

1830

!= type_func(value)):

1081

dbus_value = transform_func(type_func(value),

1082

variant_level

1083

=variant_level)

1084

self.PropertyChanged(dbus.String(dbus_name),

1085

dbus_value)

1831

if invalidate_only:

1832

self.PropertiesChanged(

1833

_interface, dbus.Dictionary(),

1834

dbus.Array((dbus_name, )))

1835

else:

1836

dbus_value = transform_func(

1837

type_func(value),

1838

variant_level=variant_level)

1839

self.PropertyChanged(dbus.String(dbus_name),

1840

dbus_value)

1841

self.PropertiesChanged(

1842

_interface,

1843

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

1844

dbus_value}),

1845

dbus.Array())

1086

1846

setattr(self, attrname, value)

1087

1847

1088

1848

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

1089

1090

1849

1091

1850

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1092

1851

approvals_pending = notifychangeproperty(dbus.Boolean,

1093

1852

"ApprovalPending",

1094

type_func = bool)

1853

type_func=bool)

1095

1854

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

1096

1855

last_enabled = notifychangeproperty(datetime_to_dbus,

1097

1856

"LastEnabled")

1098

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

1099

type_func = lambda checker:

1100

checker is not None)

1857

checker = notifychangeproperty(

1858

dbus.Boolean, "CheckerRunning",

1859

type_func=lambda checker: checker is not None)

1101

1860

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1102

1861

"LastCheckedOK")

1862

last_checker_status = notifychangeproperty(dbus.Int16,

1863

"LastCheckerStatus")

1103

1864

last_approval_request = notifychangeproperty(

1104

1865

datetime_to_dbus, "LastApprovalRequest")

1105

1866

approved_by_default = notifychangeproperty(dbus.Boolean,

1106

1867

"ApprovedByDefault")

1107

approval_delay = notifychangeproperty(dbus.UInt64,

1108

"ApprovalDelay",

1109

type_func =

1110

timedelta_to_milliseconds)

1868

approval_delay = notifychangeproperty(

1869

dbus.UInt64, "ApprovalDelay",

1870

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

1111

1871

approval_duration = notifychangeproperty(

1112

1872

dbus.UInt64, "ApprovalDuration",

1113

type_func = timedelta_to_milliseconds)

1873

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

1114

1874

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

1115

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

1116

type_func =

1117

timedelta_to_milliseconds)

1875

timeout = notifychangeproperty(

1876

dbus.UInt64, "Timeout",

1877

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

1118

1878

extended_timeout = notifychangeproperty(

1119

1879

dbus.UInt64, "ExtendedTimeout",

1120

type_func = timedelta_to_milliseconds)

1121

interval = notifychangeproperty(dbus.UInt64,

1122

"Interval",

1123

type_func =

1124

timedelta_to_milliseconds)

1880

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

1881

interval = notifychangeproperty(

1882

dbus.UInt64, "Interval",

1883

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

1125

1884

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

1126

1885

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

1886

invalidate_only=True)

1887

1127

1888

del notifychangeproperty

1128

1889

1129

1890

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

1130

1891

try:

1131

1892

self.remove_from_connection()

1134

1895

if hasattr(DBusObjectWithProperties, "__del__"):

1135

1896

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

1136

1897

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

1137

1138

def checker_callback(self, pid, condition, command,

1139

*args, **kwargs):

1140

self.checker_callback_tag = None

1141

self.checker = None

1142

if os.WIFEXITED(condition):

1143

exitstatus = os.WEXITSTATUS(condition)

1898

1899

def checker_callback(self, source, condition,

1900

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

1901

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

1902

connection, command, *args,

1903

**kwargs)

1904

exitstatus = self.last_checker_status

1905

if exitstatus >= 0:

1144

1906

# Emit D-Bus signal

1145

1907

self.CheckerCompleted(dbus.Int16(exitstatus),

1146

dbus.Int64(condition),

1908

# This is specific to GNU libC

1909

dbus.Int64(exitstatus << 8),

1147

1910

dbus.String(command))

1148

1911

else:

1149

1912

# Emit D-Bus signal

1150

1913

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

1151

dbus.Int64(condition),

1914

dbus.Int64(

1915

# This is specific to GNU libC

1916

(exitstatus << 8)

1917

| self.last_checker_signal),

1152

1918

dbus.String(command))

1153

1154

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

1155

*args, **kwargs)

1156

1919

return ret

1920

1157

1921

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

1158

old_checker = self.checker

1159

if self.checker is not None:

1160

old_checker_pid = self.checker.pid

1161

else:

1162

old_checker_pid = None

1922

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

1163

1923

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

1164

1924

# Only if new checker process was started

1165

1925

if (self.checker is not None

1167

1927

# Emit D-Bus signal

1168

1928

self.CheckerStarted(self.current_checker_command)

1169

1929

return r

1170

1930

1171

1931

def _reset_approved(self):

1172

1932

self.approved = None

1173

1933

return False

1174

1934

1175

1935

def approve(self, value=True):

1176

self.send_changedstate()

1177

1936

self.approved = value

1178

gobject.timeout_add(timedelta_to_milliseconds

1179

(self.approval_duration),

1180

self._reset_approved)

1181

1182

1183

## D-Bus methods, signals & properties

1184

_interface = "se.recompile.Mandos.Client"

1185

1186

## Signals

1187

1937

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

1938

* 1000), self._reset_approved)

1939

self.send_changedstate()

1940

1941

# D-Bus methods, signals & properties

1942

1943

# Interfaces

1944

1945

# Signals

1946

1188

1947

# CheckerCompleted - signal

1189

1948

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

1190

1949

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

1191

1950

"D-Bus signal"

1192

1951

pass

1193

1952

1194

1953

# CheckerStarted - signal

1195

1954

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

1196

1955

def CheckerStarted(self, command):

1197

1956

"D-Bus signal"

1198

1957

pass

1199

1958

1200

1959

# PropertyChanged - signal

1960

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

1201

1961

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

1202

1962

def PropertyChanged(self, property, value):

1203

1963

"D-Bus signal"

1204

1964

pass

1205

1965

1206

1966

# GotSecret - signal

1207

1967

@dbus.service.signal(_interface)

1208

1968

def GotSecret(self):

1211

1971

server to mandos-client

1212

1972

"""

1213

1973

pass

1214

1974

1215

1975

# Rejected - signal

1216

1976

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

1217

1977

def Rejected(self, reason):

1218

1978

"D-Bus signal"

1219

1979

pass

1220

1980

1221

1981

# NeedApproval - signal

1222

1982

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

1223

1983

def NeedApproval(self, timeout, default):

1224

1984

"D-Bus signal"

1225

1985

return self.need_approval()

1226

1227

## Methods

1228

1986

1987

# Methods

1988

1229

1989

# Approve - method

1230

1990

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

1231

1991

def Approve(self, value):

1232

1992

self.approve(value)

1233

1993

1234

1994

# CheckedOK - method

1235

1995

@dbus.service.method(_interface)

1236

1996

def CheckedOK(self):

1237

1997

self.checked_ok()

1238

1998

1239

1999

# Enable - method

2000

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

1240

2001

@dbus.service.method(_interface)

1241

2002

def Enable(self):

1242

2003

"D-Bus method"

1243

2004

self.enable()

1244

2005

1245

2006

# StartChecker - method

2007

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

1246

2008

@dbus.service.method(_interface)

1247

2009

def StartChecker(self):

1248

2010

"D-Bus method"

1249

2011

self.start_checker()

1250

2012

1251

2013

# Disable - method

2014

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

1252

2015

@dbus.service.method(_interface)

1253

2016

def Disable(self):

1254

2017

"D-Bus method"

1255

2018

self.disable()

1256

2019

1257

2020

# StopChecker - method

2021

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

1258

2022

@dbus.service.method(_interface)

1259

2023

def StopChecker(self):

1260

2024

self.stop_checker()

1261

1262

## Properties

1263

2025

2026

# Properties

2027

1264

2028

# ApprovalPending - property

1265

2029

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

1266

2030

def ApprovalPending_dbus_property(self):

1267

2031

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

1268

2032

1269

2033

# ApprovedByDefault - property

1270

@dbus_service_property(_interface, signature="b",

2034

@dbus_service_property(_interface,

2035

signature="b",

1271

2036

access="readwrite")

1272

2037

def ApprovedByDefault_dbus_property(self, value=None):

1273

2038

if value is None: # get

1274

2039

return dbus.Boolean(self.approved_by_default)

1275

2040

self.approved_by_default = bool(value)

1276

2041

1277

2042

# ApprovalDelay - property

1278

@dbus_service_property(_interface, signature="t",

2043

@dbus_service_property(_interface,

2044

signature="t",

1279

2045

access="readwrite")

1280

2046

def ApprovalDelay_dbus_property(self, value=None):

1281

2047

if value is None: # get

1282

return dbus.UInt64(self.approval_delay_milliseconds())

2048

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

2049

* 1000)

1283

2050

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

1284

2051

1285

2052

# ApprovalDuration - property

1286

@dbus_service_property(_interface, signature="t",

2053

@dbus_service_property(_interface,

2054

signature="t",

1287

2055

access="readwrite")

1288

2056

def ApprovalDuration_dbus_property(self, value=None):

1289

2057

if value is None: # get

1290

return dbus.UInt64(timedelta_to_milliseconds(

1291

self.approval_duration))

2058

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

2059

* 1000)

1292

2060

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

1293

2061

1294

2062

# Name - property

2063

@dbus_annotations(

2064

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

1295

2065

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

1296

2066

def Name_dbus_property(self):

1297

2067

return dbus.String(self.name)

1298

2068

2069

# KeyID - property

2070

@dbus_annotations(

2071

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

2072

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

2073

def KeyID_dbus_property(self):

2074

return dbus.String(self.key_id)

2075

1299

2076

# Fingerprint - property

2077

@dbus_annotations(

2078

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

1300

2079

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

1301

2080

def Fingerprint_dbus_property(self):

1302

2081

return dbus.String(self.fingerprint)

1303

2082

1304

2083

# Host - property

1305

@dbus_service_property(_interface, signature="s",

2084

@dbus_service_property(_interface,

2085

signature="s",

1306

2086

access="readwrite")

1307

2087

def Host_dbus_property(self, value=None):

1308

2088

if value is None: # get

1309

2089

return dbus.String(self.host)

1310

self.host = unicode(value)

1311

2090

self.host = str(value)

2091

1312

2092

# Created - property

2093

@dbus_annotations(

2094

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

1313

2095

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

1314

2096

def Created_dbus_property(self):

1315

2097

return datetime_to_dbus(self.created)

1316

2098

1317

2099

# LastEnabled - property

1318

2100

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

1319

2101

def LastEnabled_dbus_property(self):

1320

2102

return datetime_to_dbus(self.last_enabled)

1321

2103

1322

2104

# Enabled - property

1323

@dbus_service_property(_interface, signature="b",

2105

@dbus_service_property(_interface,

2106

signature="b",

1324

2107

access="readwrite")

1325

2108

def Enabled_dbus_property(self, value=None):

1326

2109

if value is None: # get

1329

2112

self.enable()

1330

2113

else:

1331

2114

self.disable()

1332

2115

1333

2116

# LastCheckedOK - property

1334

@dbus_service_property(_interface, signature="s",

2117

@dbus_service_property(_interface,

2118

signature="s",

1335

2119

access="readwrite")

1336

2120

def LastCheckedOK_dbus_property(self, value=None):

1337

2121

if value is not None:

1338

2122

self.checked_ok()

1339

2123

return

1340

2124

return datetime_to_dbus(self.last_checked_ok)

1341

2125

2126

# LastCheckerStatus - property

2127

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

2128

def LastCheckerStatus_dbus_property(self):

2129

return dbus.Int16(self.last_checker_status)

2130

1342

2131

# Expires - property

1343

2132

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

1344

2133

def Expires_dbus_property(self):

1345

2134

return datetime_to_dbus(self.expires)

1346

2135

1347

2136

# LastApprovalRequest - property

1348

2137

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

1349

2138

def LastApprovalRequest_dbus_property(self):

1350

2139

return datetime_to_dbus(self.last_approval_request)

1351

2140

1352

2141

# Timeout - property

1353

@dbus_service_property(_interface, signature="t",

2142

@dbus_service_property(_interface,

2143

signature="t",

1354

2144

access="readwrite")

1355

2145

def Timeout_dbus_property(self, value=None):

1356

2146

if value is None: # get

1357

return dbus.UInt64(self.timeout_milliseconds())

2147

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

2148

old_timeout = self.timeout

1358

2149

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

1359

# Reschedule timeout

2150

# Reschedule disabling

1360

2151

if self.enabled:

1361

2152

now = datetime.datetime.utcnow()

1362

time_to_die = timedelta_to_milliseconds(

1363

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

1364

if time_to_die <= 0:

2153

self.expires += self.timeout - old_timeout

2154

if self.expires <= now:

1365

2155

# The timeout has passed

1366

2156

self.disable()

1367

2157

else:

1368

self.expires = (now +

1369

datetime.timedelta(milliseconds =

1370

time_to_die))

1371

2158

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

1372

2159

is None):

1373

2160

return

1374

gobject.source_remove(self.disable_initiator_tag)

1375

self.disable_initiator_tag = (gobject.timeout_add

1376

(time_to_die,

1377

self.disable))

1378

2161

GLib.source_remove(self.disable_initiator_tag)

2162

self.disable_initiator_tag = GLib.timeout_add(

2163

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

2164

self.disable)

2165

1379

2166

# ExtendedTimeout - property

1380

@dbus_service_property(_interface, signature="t",

2167

@dbus_service_property(_interface,

2168

signature="t",

1381

2169

access="readwrite")

1382

2170

def ExtendedTimeout_dbus_property(self, value=None):

1383

2171

if value is None: # get

1384

return dbus.UInt64(self.extended_timeout_milliseconds())

2172

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

2173

* 1000)

1385

2174

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

1386

2175

1387

2176

# Interval - property

1388

@dbus_service_property(_interface, signature="t",

2177

@dbus_service_property(_interface,

2178

signature="t",

1389

2179

access="readwrite")

1390

2180

def Interval_dbus_property(self, value=None):

1391

2181

if value is None: # get

1392

return dbus.UInt64(self.interval_milliseconds())

2182

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

1393

2183

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

1394

2184

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

1395

2185

return

1396

2186

if self.enabled:

1397

2187

# Reschedule checker run

1398

gobject.source_remove(self.checker_initiator_tag)

1399

self.checker_initiator_tag = (gobject.timeout_add

1400

(value, self.start_checker))

1401

self.start_checker() # Start one now, too

1402

2188

GLib.source_remove(self.checker_initiator_tag)

2189

self.checker_initiator_tag = GLib.timeout_add(

2190

value, self.start_checker)

2191

self.start_checker() # Start one now, too

2192

1403

2193

# Checker - property

1404

@dbus_service_property(_interface, signature="s",

2194

@dbus_service_property(_interface,

2195

signature="s",

1405

2196

access="readwrite")

1406

2197

def Checker_dbus_property(self, value=None):

1407

2198

if value is None: # get

1408

2199

return dbus.String(self.checker_command)

1409

self.checker_command = unicode(value)

1410

2200

self.checker_command = str(value)

2201

1411

2202

# CheckerRunning - property

1412

@dbus_service_property(_interface, signature="b",

2203

@dbus_service_property(_interface,

2204

signature="b",

1413

2205

access="readwrite")

1414

2206

def CheckerRunning_dbus_property(self, value=None):

1415

2207

if value is None: # get

1418

2210

self.start_checker()

1419

2211

else:

1420

2212

self.stop_checker()

1421

2213

1422

2214

# ObjectPath - property

2215

@dbus_annotations(

2216

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

2217

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

1423

2218

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

1424

2219

def ObjectPath_dbus_property(self):

1425

return self.dbus_object_path # is already a dbus.ObjectPath

1426

2220

return self.dbus_object_path # is already a dbus.ObjectPath

2221

1427

2222

# Secret = property

1428

@dbus_service_property(_interface, signature="ay",

1429

access="write", byte_arrays=True)

2223

@dbus_annotations(

2224

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

2225

"invalidates"})

2226

@dbus_service_property(_interface,

2227

signature="ay",

2228

access="write",

2229

byte_arrays=True)

1430

2230

def Secret_dbus_property(self, value):

1431

self.secret = str(value)

1432

2231

self.secret = bytes(value)

2232

1433

2233

del _interface

1434

2234

1435

2235

1436

class ProxyClient(object):

1437

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

2236

class ProxyClient:

2237

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

1438

2238

self._pipe = child_pipe

1439

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

2239

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

1440

2240

if not self._pipe.recv():

1441

raise KeyError()

1442

2241

raise KeyError(key_id or fpr)

2242

1443

2243

def __getattribute__(self, name):

1444

2244

if name == '_pipe':

1445

2245

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

1448

2248

if data[0] == 'data':

1449

2249

return data[1]

1450

2250

if data[0] == 'function':

2251

1451

2252

def func(*args, **kwargs):

1452

2253

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

1453

2254

return self._pipe.recv()[1]

2255

1454

2256

return func

1455

2257

1456

2258

def __setattr__(self, name, value):

1457

2259

if name == '_pipe':

1458

2260

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

1459

2261

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

1460

2262

1461

2263

1462

class ClientDBusTransitional(ClientDBus):

1463

__metaclass__ = AlternateDBusNamesMetaclass

1464

1465

1466

2264

class ClientHandler(socketserver.BaseRequestHandler, object):

1467

2265

"""A class to handle client connections.

1468

2266

1469

2267

Instantiated once for each connection to handle it.

1470

2268

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

1471

2269

1472

2270

def handle(self):

1473

2271

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

1474

2272

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

1475

unicode(self.client_address))

2273

str(self.client_address))

1476

2274

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

1477

2275

self.server.child_pipe.fileno())

1478

1479

session = (gnutls.connection

1480

.ClientSession(self.request,

1481

gnutls.connection

1482

.X509Credentials()))

1483

1484

# Note: gnutls.connection.X509Credentials is really a

1485

# generic GnuTLS certificate credentials object so long as

1486

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

1487

# here despite using OpenPGP certificates.

1488

1489

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

1490

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

1491

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

1492

# "+DHE-DSS"))

2276

2277

session = gnutls.ClientSession(self.request)

2278

2279

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

2280

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

2281

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

2282

# "+DHE-DSS"))

1493

2283

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

1494

2284

priority = self.server.gnutls_priority

1495

2285

if priority is None:

1496

2286

priority = "NORMAL"

1497

(gnutls.library.functions

1498

.gnutls_priority_set_direct(session._c_object,

1499

priority, None))

1500

2287

gnutls.priority_set_direct(session._c_object,

2288

priority.encode("utf-8"),

2289

None)

2290

1501

2291

# Start communication using the Mandos protocol

1502

2292

# Get protocol number

1503

2293

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

1504

2294

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

1505

2295

try:

1506

2296

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

1507

raise RuntimeError

2297

raise RuntimeError(line)

1508

2298

except (ValueError, IndexError, RuntimeError) as error:

1509

2299

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

1510

2300

return

1511

2301

1512

2302

# Start GnuTLS connection

1513

2303

try:

1514

2304

session.handshake()

1515

except gnutls.errors.GNUTLSError as error:

2305

except gnutls.Error as error:

1516

2306

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

1517

2307

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

1518

2308

# established. Just abandon the request.

1519

2309

return

1520

2310

logger.debug("Handshake succeeded")

1521

2311

1522

2312

approval_required = False

1523

2313

try:

1524

try:

1525

fpr = self.fingerprint(self.peer_certificate

1526

(session))

1527

except (TypeError,

1528

gnutls.errors.GNUTLSError) as error:

1529

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

1530

return

1531

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

1532

1533

try:

1534

client = ProxyClient(child_pipe, fpr,

2314

if gnutls.has_rawpk:

2315

fpr = b""

2316

try:

2317

key_id = self.key_id(

2318

self.peer_certificate(session))

2319

except (TypeError, gnutls.Error) as error:

2320

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

2321

return

2322

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

2323

2324

else:

2325

key_id = b""

2326

try:

2327

fpr = self.fingerprint(

2328

self.peer_certificate(session))

2329

except (TypeError, gnutls.Error) as error:

2330

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

2331

return

2332

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

2333

2334

try:

2335

client = ProxyClient(child_pipe, key_id, fpr,

1535

2336

self.client_address)

1536

2337

except KeyError:

1537

2338

return

1538

2339

1539

2340

if client.approval_delay:

1540

2341

delay = client.approval_delay

1541

2342

client.approvals_pending += 1

1542

2343

approval_required = True

1543

2344

1544

2345

while True:

1545

2346

if not client.enabled:

1546

2347

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

1547

client.name)

2348

client.name)

1548

2349

if self.server.use_dbus:

1549

2350

# Emit D-Bus signal

1550

2351

client.Rejected("Disabled")

1551

2352

return

1552

2353

1553

2354

if client.approved or not client.approval_delay:

1554

#We are approved or approval is disabled

2355

# We are approved or approval is disabled

1555

2356

break

1556

2357

elif client.approved is None:

1557

2358

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

1559

2360

if self.server.use_dbus:

1560

2361

# Emit D-Bus signal

1561

2362

client.NeedApproval(

1562

client.approval_delay_milliseconds(),

1563

client.approved_by_default)

2363

client.approval_delay.total_seconds()

2364

* 1000, client.approved_by_default)

1564

2365

else:

1565

2366

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

1566

2367

client.name)

1568

2369

# Emit D-Bus signal

1569

2370

client.Rejected("Denied")

1570

2371

return

1571

1572

#wait until timeout or approved

2372

2373

# wait until timeout or approved

1573

2374

time = datetime.datetime.now()

1574

2375

client.changedstate.acquire()

1575

(client.changedstate.wait

1576

(float(client.timedelta_to_milliseconds(delay)

1577

/ 1000)))

2376

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

1578

2377

client.changedstate.release()

1579

2378

time2 = datetime.datetime.now()

1580

2379

if (time2 - time) >= delay:

1590

2389

break

1591

2390

else:

1592

2391

delay -= time2 - time

1593

1594

sent_size = 0

1595

while sent_size < len(client.secret):

1596

try:

1597

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

1598

except gnutls.errors.GNUTLSError as error:

1599

logger.warning("gnutls send failed")

1600

return

1601

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

1602

sent, len(client.secret)

1603

- (sent_size + sent))

1604

sent_size += sent

1605

2392

2393

try:

2394

session.send(client.secret)

2395

except gnutls.Error as error:

2396

logger.warning("gnutls send failed",

2397

exc_info=error)

2398

return

2399

1606

2400

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

1607

2401

# bump the timeout using extended_timeout

1608

client.checked_ok(client.extended_timeout)

2402

client.bump_timeout(client.extended_timeout)

1609

2403

if self.server.use_dbus:

1610

2404

# Emit D-Bus signal

1611

2405

client.GotSecret()

1612

2406

1613

2407

finally:

1614

2408

if approval_required:

1615

2409

client.approvals_pending -= 1

1616

2410

try:

1617

2411

session.bye()

1618

except gnutls.errors.GNUTLSError as error:

1619

logger.warning("GnuTLS bye failed")

1620

2412

except gnutls.Error as error:

2413

logger.warning("GnuTLS bye failed",

2414

exc_info=error)

2415

1621

2416

@staticmethod

1622

2417

def peer_certificate(session):

1623

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

1624

# If not an OpenPGP certificate...

1625

if (gnutls.library.functions

1626

.gnutls_certificate_type_get(session._c_object)

1627

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1628

# ...do the normal thing

1629

return session.peer_certificate

2418

"Return the peer's certificate as a bytestring"

2419

try:

2420

cert_type = gnutls.certificate_type_get2(session._c_object,

2421

gnutls.CTYPE_PEERS)

2422

except AttributeError:

2423

cert_type = gnutls.certificate_type_get(session._c_object)

2424

if gnutls.has_rawpk:

2425

valid_cert_types = frozenset((gnutls.CRT_RAWPK,))

2426

else:

2427

valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))

2428

# If not a valid certificate type...

2429

if cert_type not in valid_cert_types:

2430

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

2431

valid_cert_types)

2432

# ...return invalid data

2433

return b""

1630

2434

list_size = ctypes.c_uint(1)

1631

cert_list = (gnutls.library.functions

1632

.gnutls_certificate_get_peers

2435

cert_list = (gnutls.certificate_get_peers

1633

2436

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

1634

2437

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

1635

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

1636

" certificate")

2438

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

1637

2439

if list_size.value == 0:

1638

2440

return None

1639

2441

cert = cert_list[0]

1640

2442

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

1641

2443

2444

@staticmethod

2445

def key_id(certificate):

2446

"Convert a certificate bytestring to a hexdigit key ID"

2447

# New GnuTLS "datum" with the public key

2448

datum = gnutls.datum_t(

2449

ctypes.cast(ctypes.c_char_p(certificate),

2450

ctypes.POINTER(ctypes.c_ubyte)),

2451

ctypes.c_uint(len(certificate)))

2452

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

2453

# New empty GnuTLS certificate

2454

pubkey = gnutls.pubkey_t()

2455

gnutls.pubkey_init(ctypes.byref(pubkey))

2456

# Import the raw public key into the certificate

2457

gnutls.pubkey_import(pubkey,

2458

ctypes.byref(datum),

2459

gnutls.X509_FMT_DER)

2460

# New buffer for the key ID

2461

buf = ctypes.create_string_buffer(32)

2462

buf_len = ctypes.c_size_t(len(buf))

2463

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

2464

gnutls.pubkey_get_key_id(pubkey,

2465

gnutls.KEYID_USE_SHA256,

2466

ctypes.cast(ctypes.byref(buf),

2467

ctypes.POINTER(ctypes.c_ubyte)),

2468

ctypes.byref(buf_len))

2469

# Deinit the certificate

2470

gnutls.pubkey_deinit(pubkey)

2471

2472

# Convert the buffer to a Python bytestring

2473

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

2474

# Convert the bytestring to hexadecimal notation

2475

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

2476

return hex_key_id

2477

1642

2478

@staticmethod

1643

2479

def fingerprint(openpgp):

1644

2480

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1645

2481

# New GnuTLS "datum" with the OpenPGP public key

1646

datum = (gnutls.library.types

1647

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

1648

ctypes.POINTER

1649

(ctypes.c_ubyte)),

1650

ctypes.c_uint(len(openpgp))))

2482

datum = gnutls.datum_t(

2483

ctypes.cast(ctypes.c_char_p(openpgp),

2484

ctypes.POINTER(ctypes.c_ubyte)),

2485

ctypes.c_uint(len(openpgp)))

1651

2486

# New empty GnuTLS certificate

1652

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1653

(gnutls.library.functions

1654

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2487

crt = gnutls.openpgp_crt_t()

2488

gnutls.openpgp_crt_init(ctypes.byref(crt))

1655

2489

# Import the OpenPGP public key into the certificate

1656

(gnutls.library.functions

1657

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

1658

gnutls.library.constants

1659

.GNUTLS_OPENPGP_FMT_RAW))

2490

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

2491

gnutls.OPENPGP_FMT_RAW)

1660

2492

# Verify the self signature in the key

1661

2493

crtverify = ctypes.c_uint()

1662

(gnutls.library.functions

1663

.gnutls_openpgp_crt_verify_self(crt, 0,

1664

ctypes.byref(crtverify)))

2494

gnutls.openpgp_crt_verify_self(crt, 0,

2495

ctypes.byref(crtverify))

1665

2496

if crtverify.value != 0:

1666

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1667

raise (gnutls.errors.CertificateSecurityError

1668

("Verify failed"))

2497

gnutls.openpgp_crt_deinit(crt)

2498

raise gnutls.CertificateSecurityError(code

2499

=crtverify.value)

1669

2500

# New buffer for the fingerprint

1670

2501

buf = ctypes.create_string_buffer(20)

1671

2502

buf_len = ctypes.c_size_t()

1672

2503

# Get the fingerprint from the certificate into the buffer

1673

(gnutls.library.functions

1674

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

1675

ctypes.byref(buf_len)))

2504

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

2505

ctypes.byref(buf_len))

1676

2506

# Deinit the certificate

1677

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2507

gnutls.openpgp_crt_deinit(crt)

1678

2508

# Convert the buffer to a Python bytestring

1679

2509

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

1680

2510

# Convert the bytestring to hexadecimal notation

1682

2512

return hex_fpr

1683

2513

1684

2514

1685

class MultiprocessingMixIn(object):

2515

class MultiprocessingMixIn:

1686

2516

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

2517

1687

2518

def sub_process_main(self, request, address):

1688

2519

try:

1689

2520

self.finish_request(request, address)

1690

2521

except Exception:

1691

2522

self.handle_error(request, address)

1692

2523

self.close_request(request)

1693

2524

1694

2525

def process_request(self, request, address):

1695

2526

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

1696

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

1697

args = (request,

1698

address))

2527

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

2528

args=(request, address))

1699

2529

proc.start()

1700

2530

return proc

1701

2531

1702

2532

1703

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2533

class MultiprocessingMixInWithPipe(MultiprocessingMixIn):

1704

2534

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

2535

1705

2536

def process_request(self, request, client_address):

1706

2537

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

1707

2538

1708

2539

This function creates a new pipe in self.pipe

1709

2540

"""

1710

2541

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1711

2542

1712

2543

proc = MultiprocessingMixIn.process_request(self, request,

1713

2544

client_address)

1714

2545

self.child_pipe.close()

1715

2546

self.add_pipe(parent_pipe, proc)

1716

2547

1717

2548

def add_pipe(self, parent_pipe, proc):

1718

2549

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

1719

raise NotImplementedError

2550

raise NotImplementedError()

1720

2551

1721

2552

1722

2553

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1723

socketserver.TCPServer, object):

2554

socketserver.TCPServer):

1724

2555

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

1725

2556

1726

2557

Attributes:

1727

2558

enabled: Boolean; whether this server is activated yet

1728

2559

interface: None or a network interface name (string)

1729

2560

use_ipv6: Boolean; to use IPv6 or not

1730

2561

"""

2562

1731

2563

def __init__(self, server_address, RequestHandlerClass,

1732

interface=None, use_ipv6=True):

2564

interface=None,

2565

use_ipv6=True,

2566

socketfd=None):

2567

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

2568

creating a new one with socket.socket().

2569

"""

1733

2570

self.interface = interface

1734

2571

if use_ipv6:

1735

2572

self.address_family = socket.AF_INET6

2573

if socketfd is not None:

2574

# Save the file descriptor

2575

self.socketfd = socketfd

2576

# Save the original socket.socket() function

2577

self.socket_socket = socket.socket

2578

2579

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

2580

#

2581

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

2582

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

2583

# patching socket.socket.)

2584

#

2585

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

2586

@functools.wraps(socket.socket)

2587

def socket_wrapper(*args, **kwargs):

2588

# Restore original function so subsequent calls are

2589

# not affected.

2590

socket.socket = self.socket_socket

2591

del self.socket_socket

2592

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

2593

# saved file descriptor.

2594

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

2595

# Replace socket.socket() function with wrapper

2596

socket.socket = socket_wrapper

2597

# The socketserver.TCPServer.__init__ will call

2598

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

2599

# socket_wrapper(), if socketfd was set.

1736

2600

socketserver.TCPServer.__init__(self, server_address,

1737

2601

RequestHandlerClass)

2602

1738

2603

def server_bind(self):

1739

2604

"""This overrides the normal server_bind() function

1740

2605

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

1741

2606

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

2607

global SO_BINDTODEVICE

1742

2608

if self.interface is not None:

1743

2609

if SO_BINDTODEVICE is None:

1744

logger.error("SO_BINDTODEVICE does not exist;"

1745

" cannot bind to interface %s",

1746

self.interface)

1747

else:

1748

try:

1749

self.socket.setsockopt(socket.SOL_SOCKET,

1750

SO_BINDTODEVICE,

1751

str(self.interface

1752

+ '\0'))

1753

except socket.error as error:

1754

if error[0] == errno.EPERM:

1755

logger.error("No permission to"

1756

" bind to interface %s",

1757

self.interface)

1758

elif error[0] == errno.ENOPROTOOPT:

1759

logger.error("SO_BINDTODEVICE not available;"

1760

" cannot bind to interface %s",

1761

self.interface)

1762

else:

1763

raise

2610

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

2611

# common enough.

2612

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

2613

SO_BINDTODEVICE = 25

2614

try:

2615

self.socket.setsockopt(

2616

socket.SOL_SOCKET, SO_BINDTODEVICE,

2617

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

2618

except socket.error as error:

2619

if error.errno == errno.EPERM:

2620

logger.error("No permission to bind to"

2621

" interface %s", self.interface)

2622

elif error.errno == errno.ENOPROTOOPT:

2623

logger.error("SO_BINDTODEVICE not available;"

2624

" cannot bind to interface %s",

2625

self.interface)

2626

elif error.errno == errno.ENODEV:

2627

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

2628

" cannot bind", self.interface)

2629

else:

2630

raise

1764

2631

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

1765

2632

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

2633

if self.server_address[1]:

2634

self.allow_reuse_address = True

1766

2635

if not self.server_address[0]:

1767

2636

if self.address_family == socket.AF_INET6:

1768

any_address = "::" # in6addr_any

2637

any_address = "::" # in6addr_any

1769

2638

else:

1770

any_address = socket.INADDR_ANY

2639

any_address = "0.0.0.0" # INADDR_ANY

1771

2640

self.server_address = (any_address,

1772

2641

self.server_address[1])

1773

2642

elif not self.server_address[1]:

1774

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

1775

0)

2643

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

1776

2644

# if self.interface:

1777

2645

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

1778

2646

# 0, # port

1784

2652

1785

2653

class MandosServer(IPv6_TCPServer):

1786

2654

"""Mandos server.

1787

2655

1788

2656

Attributes:

1789

2657

clients: set of Client objects

1790

2658

gnutls_priority GnuTLS priority string

1791

2659

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

1792

1793

Assumes a gobject.MainLoop event loop.

2660

2661

Assumes a GLib.MainLoop event loop.

1794

2662

"""

2663

1795

2664

def __init__(self, server_address, RequestHandlerClass,

1796

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

1797

gnutls_priority=None, use_dbus=True):

2665

interface=None,

2666

use_ipv6=True,

2667

clients=None,

2668

gnutls_priority=None,

2669

use_dbus=True,

2670

socketfd=None):

1798

2671

self.enabled = False

1799

2672

self.clients = clients

1800

2673

if self.clients is None:

1803

2676

self.gnutls_priority = gnutls_priority

1804

2677

IPv6_TCPServer.__init__(self, server_address,

1805

2678

RequestHandlerClass,

1806

interface = interface,

1807

use_ipv6 = use_ipv6)

2679

interface=interface,

2680

use_ipv6=use_ipv6,

2681

socketfd=socketfd)

2682

1808

2683

def server_activate(self):

1809

2684

if self.enabled:

1810

2685

return socketserver.TCPServer.server_activate(self)

1811

2686

1812

2687

def enable(self):

1813

2688

self.enabled = True

1814

2689

1815

2690

def add_pipe(self, parent_pipe, proc):

1816

2691

# Call "handle_ipc" for both data and EOF events

1817

gobject.io_add_watch(parent_pipe.fileno(),

1818

gobject.IO_IN | gobject.IO_HUP,

1819

functools.partial(self.handle_ipc,

1820

parent_pipe =

1821

parent_pipe,

1822

proc = proc))

1823

1824

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

1825

proc = None, client_object=None):

1826

condition_names = {

1827

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

1828

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

1829

# blocking).

1830

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

1831

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

1832

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

1833

# broken, usually for pipes and

1834

# sockets).

1835

}

1836

conditions_string = ' | '.join(name

1837

for cond, name in

1838

condition_names.iteritems()

1839

if cond & condition)

2692

GLib.io_add_watch(

2693

GLib.IOChannel.unix_new(parent_pipe.fileno()),

2694

GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,

2695

functools.partial(self.handle_ipc,

2696

parent_pipe=parent_pipe,

2697

proc=proc))

2698

2699

def handle_ipc(self, source, condition,

2700

parent_pipe=None,

2701

proc=None,

2702

client_object=None):

1840

2703

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

1841

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

2704

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

1842

2705

# Wait for other process to exit

1843

2706

proc.join()

1844

2707

return False

1845

2708

1846

2709

# Read a request from the child

1847

2710

request = parent_pipe.recv()

1848

2711

command = request[0]

1849

2712

1850

2713

if command == 'init':

1851

fpr = request[1]

1852

address = request[2]

1853

1854

for c in self.clients.itervalues():

1855

if c.fingerprint == fpr:

2714

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

2715

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

2716

address = request[3]

2717

2718

for c in self.clients.values():

2719

if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":

2720

continue

2721

if key_id and c.key_id == key_id:

2722

client = c

2723

break

2724

if fpr and c.fingerprint == fpr:

1856

2725

client = c

1857

2726

break

1858

2727

else:

1859

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

1860

"dress: %s", fpr, address)

2728

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

2729

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

1861

2730

if self.use_dbus:

1862

2731

# Emit D-Bus signal

1863

mandos_dbus_service.ClientNotFound(fpr,

2732

mandos_dbus_service.ClientNotFound(key_id or fpr,

1864

2733

address[0])

1865

2734

parent_pipe.send(False)

1866

2735

return False

1867

1868

gobject.io_add_watch(parent_pipe.fileno(),

1869

gobject.IO_IN | gobject.IO_HUP,

1870

functools.partial(self.handle_ipc,

1871

parent_pipe =

1872

parent_pipe,

1873

proc = proc,

1874

client_object =

1875

client))

2736

2737

GLib.io_add_watch(

2738

GLib.IOChannel.unix_new(parent_pipe.fileno()),

2739

GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,

2740

functools.partial(self.handle_ipc,

2741

parent_pipe=parent_pipe,

2742

proc=proc,

2743

client_object=client))

1876

2744

parent_pipe.send(True)

1877

2745

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

1878

2746

# same fileno

1881

2749

funcname = request[1]

1882

2750

args = request[2]

1883

2751

kwargs = request[3]

1884

2752

1885

2753

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

1886

2754

funcname)(*args,

1887

**kwargs)))

1888

2755

**kwargs)))

2756

1889

2757

if command == 'getattr':

1890

2758

attrname = request[1]

1891

if callable(client_object.__getattribute__(attrname)):

1892

parent_pipe.send(('function',))

2759

if isinstance(client_object.__getattribute__(attrname),

2760

collections.abc.Callable):

2761

parent_pipe.send(('function', ))

1893

2762

else:

1894

parent_pipe.send(('data', client_object

1895

.__getattribute__(attrname)))

1896

2763

parent_pipe.send((

2764

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

2765

1897

2766

if command == 'setattr':

1898

2767

attrname = request[1]

1899

2768

value = request[2]

1900

2769

setattr(client_object, attrname, value)

1901

2770

1902

2771

return True

1903

2772

1904

2773

2774

def rfc3339_duration_to_delta(duration):

2775

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

2776

2777

>>> rfc3339_duration_to_delta("P7D") == datetime.timedelta(7)

2778

True

2779

>>> rfc3339_duration_to_delta("PT60S") == datetime.timedelta(0, 60)

2780

True

2781

>>> rfc3339_duration_to_delta("PT60M") == datetime.timedelta(0, 3600)

2782

True

2783

>>> rfc3339_duration_to_delta("PT24H") == datetime.timedelta(1)

2784

True

2785

>>> rfc3339_duration_to_delta("P1W") == datetime.timedelta(7)

2786

True

2787

>>> rfc3339_duration_to_delta("PT5M30S") == datetime.timedelta(0, 330)

2788

True

2789

>>> rfc3339_duration_to_delta("P1DT3M20S") == datetime.timedelta(1, 200)

2790

True

2791

"""

2792

2793

# Parsing an RFC 3339 duration with regular expressions is not

2794

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

2795

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

2796

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

2797

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

2798

# avoid excessive use of external libraries.

2799

2800

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

2801

Token = collections.namedtuple("Token", (

2802

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

2803

# a "group" containing digits

2804

"value", # datetime.timedelta or None

2805

"followers")) # Tokens valid after this token

2806

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

2807

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

2808

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

2809

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

2810

datetime.timedelta(seconds=1),

2811

frozenset((token_end, )))

2812

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

2813

datetime.timedelta(minutes=1),

2814

frozenset((token_second, token_end)))

2815

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

2816

datetime.timedelta(hours=1),

2817

frozenset((token_minute, token_end)))

2818

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

2819

None,

2820

frozenset((token_hour, token_minute,

2821

token_second)))

2822

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

2823

datetime.timedelta(days=1),

2824

frozenset((token_time, token_end)))

2825

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

2826

datetime.timedelta(weeks=4),

2827

frozenset((token_day, token_end)))

2828

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

2829

datetime.timedelta(weeks=52),

2830

frozenset((token_month, token_end)))

2831

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

2832

datetime.timedelta(weeks=1),

2833

frozenset((token_end, )))

2834

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

2835

frozenset((token_year, token_month,

2836

token_day, token_time,

2837

token_week)))

2838

# Define starting values:

2839

# Value so far

2840

value = datetime.timedelta()

2841

found_token = None

2842

# Following valid tokens

2843

followers = frozenset((token_duration, ))

2844

# String left to parse

2845

s = duration

2846

# Loop until end token is found

2847

while found_token is not token_end:

2848

# Search for any currently valid tokens

2849

for token in followers:

2850

match = token.regexp.match(s)

2851

if match is not None:

2852

# Token found

2853

if token.value is not None:

2854

# Value found, parse digits

2855

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

2856

# Add to value so far

2857

value += factor * token.value

2858

# Strip token from string

2859

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

2860

# Go to found token

2861

found_token = token

2862

# Set valid next tokens

2863

followers = found_token.followers

2864

break

2865

else:

2866

# No currently valid tokens were found

2867

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

2868

.format(duration))

2869

# End token found

2870

return value

2871

2872

1905

2873

def string_to_delta(interval):

1906

2874

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

1907

1908

>>> string_to_delta('7d')

1909

datetime.timedelta(7)

1910

>>> string_to_delta('60s')

1911

datetime.timedelta(0, 60)

1912

>>> string_to_delta('60m')

1913

datetime.timedelta(0, 3600)

1914

>>> string_to_delta('24h')

1915

datetime.timedelta(1)

1916

>>> string_to_delta('1w')

1917

datetime.timedelta(7)

1918

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

1919

datetime.timedelta(0, 330)

2875

2876

>>> string_to_delta('7d') == datetime.timedelta(7)

2877

True

2878

>>> string_to_delta('60s') == datetime.timedelta(0, 60)

2879

True

2880

>>> string_to_delta('60m') == datetime.timedelta(0, 3600)

2881

True

2882

>>> string_to_delta('24h') == datetime.timedelta(1)

2883

True

2884

>>> string_to_delta('1w') == datetime.timedelta(7)

2885

True

2886

>>> string_to_delta('5m 30s') == datetime.timedelta(0, 330)

2887

True

1920

2888

"""

2889

2890

try:

2891

return rfc3339_duration_to_delta(interval)

2892

except ValueError:

2893

pass

2894

1921

2895

timevalue = datetime.timedelta(0)

1922

2896

for s in interval.split():

1923

2897

try:

1924

suffix = unicode(s[-1])

2898

suffix = s[-1]

1925

2899

value = int(s[:-1])

1926

2900

if suffix == "d":

1927

2901

delta = datetime.timedelta(value)

1934

2908

elif suffix == "w":

1935

2909

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

1936

2910

else:

1937

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

1938

except (ValueError, IndexError) as e:

2911

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

2912

except IndexError as e:

1939

2913

raise ValueError(*(e.args))

1940

2914

timevalue += delta

1941

2915

return timevalue

1942

2916

1943

2917

1944

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

2918

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

1945

2919

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

1946

2920

1947

2921

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

1948

2922

if os.fork():

1949

2923

sys.exit()

1954

2928

sys.exit()

1955

2929

if not noclose:

1956

2930

# Close all standard open file descriptors

1957

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

2931

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

1958

2932

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

1959

2933

raise OSError(errno.ENODEV,

1960

"%s not a character device"

1961

% os.path.devnull)

2934

"{} not a character device"

2935

.format(os.devnull))

1962

2936

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

1963

2937

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

1964

2938

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

1967

2941

1968

2942

1969

2943

def main():

1970

2944

1971

2945

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

1972

2946

# Parsing of options, both command line and config file

1973

2947

1974

2948

parser = argparse.ArgumentParser()

1975

2949

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

1976

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

2950

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

1977

2951

help="show version number and exit")

1978

2952

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

1979

2953

help="Bind to interface IF")

1985

2959

help="Run self-test")

1986

2960

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

1987

2961

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

1988

" to terminal")

2962

" to terminal", default=None)

1989

2963

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

1990

2964

help="Debug level for stdout output")

1991

2965

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

1998

2972

" files")

1999

2973

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

2000

2974

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

2001

" system bus interface")

2975

" system bus interface", default=None)

2002

2976

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

2003

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

2977

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

2978

default=None)

2004

2979

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

2005

2980

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

2006

" state")

2981

" state", default=None)

2982

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

2983

help="Specify a file descriptor to a network"

2984

" socket to use instead of creating one")

2007

2985

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

2008

2986

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

2009

2987

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

2988

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

2989

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

2990

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

2991

default=None)

2992

2010

2993

options = parser.parse_args()

2011

2012

if options.check:

2013

import doctest

2014

doctest.testmod()

2015

sys.exit()

2016

2994

2017

2995

# Default values for config file for server-global settings

2018

server_defaults = { "interface": "",

2019

"address": "",

2020

"port": "",

2021

"debug": "False",

2022

"priority":

2023

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

2024

"servicename": "Mandos",

2025

"use_dbus": "True",

2026

"use_ipv6": "True",

2027

"debuglevel": "",

2028

"restore": "True",

2029

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

2030

}

2031

2996

if gnutls.has_rawpk:

2997

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

2998

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

2999

else:

3000

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

3001

":+SIGN-DSA-SHA256")

3002

server_defaults = {"interface": "",

3003

"address": "",

3004

"port": "",

3005

"debug": "False",

3006

"priority": priority,

3007

"servicename": "Mandos",

3008

"use_dbus": "True",

3009

"use_ipv6": "True",

3010

"debuglevel": "",

3011

"restore": "True",

3012

"socket": "",

3013

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

3014

"foreground": "False",

3015

"zeroconf": "True",

3016

}

3017

del priority

3018

2032

3019

# Parse config file for server-global settings

2033

server_config = configparser.SafeConfigParser(server_defaults)

3020

server_config = configparser.ConfigParser(server_defaults)

2034

3021

del server_defaults

2035

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

2036

"mandos.conf"))

2037

# Convert the SafeConfigParser object to a dict

3022

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

3023

# Convert the ConfigParser object to a dict

2038

3024

server_settings = server_config.defaults()

2039

3025

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

2040

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

3026

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

3027

"foreground", "zeroconf"):

2041

3028

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

2042

3029

option)

2043

3030

if server_settings["port"]:

2044

3031

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

2045

3032

"port")

3033

if server_settings["socket"]:

3034

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

3035

"socket")

3036

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

3037

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

3038

# happen with a supplied network socket.

3039

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

3040

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

3041

["socket"])

2046

3042

del server_config

2047

3043

2048

3044

# Override the settings from the config file with command line

2049

3045

# options, if set.

2050

3046

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

2051

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

2052

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

2053

"statedir"):

3047

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

3048

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

3049

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

2054

3050

value = getattr(options, option)

2055

3051

if value is not None:

2056

3052

server_settings[option] = value

2057

3053

del options

2058

3054

# Force all strings to be unicode

2059

3055

for option in server_settings.keys():

2060

if type(server_settings[option]) is str:

2061

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

3056

if isinstance(server_settings[option], bytes):

3057

server_settings[option] = (server_settings[option]

3058

.decode("utf-8"))

3059

# Force all boolean options to be boolean

3060

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

3061

"foreground", "zeroconf"):

3062

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

3063

# Debug implies foreground

3064

if server_settings["debug"]:

3065

server_settings["foreground"] = True

2062

3066

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

2063

3067

2064

3068

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

2065

3069

3070

if (not server_settings["zeroconf"]

3071

and not (server_settings["port"]

3072

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

3073

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

3074

2066

3075

# For convenience

2067

3076

debug = server_settings["debug"]

2068

3077

debuglevel = server_settings["debuglevel"]

2070

3079

use_ipv6 = server_settings["use_ipv6"]

2071

3080

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

2072

3081

stored_state_file)

2073

3082

foreground = server_settings["foreground"]

3083

zeroconf = server_settings["zeroconf"]

3084

2074

3085

if debug:

2075

3086

initlogger(debug, logging.DEBUG)

2076

3087

else:

2079

3090

else:

2080

3091

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

2081

3092

initlogger(debug, level)

2082

3093

2083

3094

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

2084

syslogger.setFormatter(logging.Formatter

2085

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

2086

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

2087

% server_settings["servicename"]))

2088

3095

syslogger.setFormatter(

3096

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

3097

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

3098

server_settings["servicename"])))

3099

2089

3100

# Parse config file with clients

2090

client_config = configparser.SafeConfigParser(Client

2091

.client_defaults)

3101

client_config = configparser.ConfigParser(Client.client_defaults)

2092

3102

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

2093

3103

"clients.conf"))

2094

3104

2095

3105

global mandos_dbus_service

2096

3106

mandos_dbus_service = None

2097

2098

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

2099

server_settings["port"]),

2100

ClientHandler,

2101

interface=(server_settings["interface"]

2102

or None),

2103

use_ipv6=use_ipv6,

2104

gnutls_priority=

2105

server_settings["priority"],

2106

use_dbus=use_dbus)

2107

if not debug:

2108

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

2109

try:

2110

pidfile = open(pidfilename, "w")

2111

except IOError:

2112

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

2113

2114

try:

2115

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

2116

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

2117

except KeyError:

2118

try:

2119

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

2120

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

3107

3108

socketfd = None

3109

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

3110

socketfd = server_settings["socket"]

3111

tcp_server = MandosServer(

3112

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

3113

ClientHandler,

3114

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

3115

use_ipv6=use_ipv6,

3116

gnutls_priority=server_settings["priority"],

3117

use_dbus=use_dbus,

3118

socketfd=socketfd)

3119

if not foreground:

3120

pidfilename = "/run/mandos.pid"

3121

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

3122

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

3123

pidfile = None

3124

try:

3125

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

3126

except IOError as e:

3127

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

3128

exc_info=e)

3129

3130

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

3131

("mandos", "mandos"),

3132

("nobody", "nogroup")):

3133

try:

3134

uid = pwd.getpwnam(name).pw_uid

3135

gid = pwd.getpwnam(group).pw_gid

3136

break

2121

3137

except KeyError:

2122

try:

2123

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

2124

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

2125

except KeyError:

2126

uid = 65534

2127

gid = 65534

3138

continue

3139

else:

3140

uid = 65534

3141

gid = 65534

2128

3142

try:

2129

3143

os.setgid(gid)

2130

3144

os.setuid(uid)

3145

if debug:

3146

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

3147

gid))

2131

3148

except OSError as error:

2132

if error[0] != errno.EPERM:

2133

raise error

2134

3149

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

3150

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

3151

if error.errno != errno.EPERM:

3152

raise

3153

2135

3154

if debug:

2136

3155

# Enable all possible GnuTLS debugging

2137

3156

2138

3157

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

2139

3158

# - GnuTLS manual

2140

gnutls.library.functions.gnutls_global_set_log_level(11)

2141

2142

@gnutls.library.types.gnutls_log_func

3159

gnutls.global_set_log_level(11)

3160

3161

@gnutls.log_func

2143

3162

def debug_gnutls(level, string):

2144

3163

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

2145

2146

(gnutls.library.functions

2147

.gnutls_global_set_log_function(debug_gnutls))

2148

3164

3165

gnutls.global_set_log_function(debug_gnutls)

3166

2149

3167

# Redirect stdin so all checkers get /dev/null

2150

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

3168

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

2151

3169

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

2152

3170

if null > 2:

2153

3171

os.close(null)

2154

3172

2155

3173

# Need to fork before connecting to D-Bus

2156

if not debug:

3174

if not foreground:

2157

3175

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

2158

3176

daemon()

2159

2160

gobject.threads_init()

2161

3177

3178

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

3179

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

3180

# need to inform GLib that threads will be used.

3181

GLib.threads_init()

3182

2162

3183

global main_loop

2163

3184

# From the Avahi example code

2164

DBusGMainLoop(set_as_default=True )

2165

main_loop = gobject.MainLoop()

3185

DBusGMainLoop(set_as_default=True)

3186

main_loop = GLib.MainLoop()

2166

3187

bus = dbus.SystemBus()

2167

3188

# End of Avahi example code

2168

3189

if use_dbus:

2169

3190

try:

2170

3191

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

2171

bus, do_not_queue=True)

2172

old_bus_name = (dbus.service.BusName

2173

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

2174

do_not_queue=True))

2175

except dbus.exceptions.NameExistsException as e:

2176

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

3192

bus,

3193

do_not_queue=True)

3194

old_bus_name = dbus.service.BusName(

3195

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

3196

do_not_queue=True)

3197

except dbus.exceptions.DBusException as e:

3198

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

2177

3199

use_dbus = False

2178

3200

server_settings["use_dbus"] = False

2179

3201

tcp_server.use_dbus = False

2180

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2181

service = AvahiServiceToSyslog(name =

2182

server_settings["servicename"],

2183

servicetype = "_mandos._tcp",

2184

protocol = protocol, bus = bus)

2185

if server_settings["interface"]:

2186

service.interface = (if_nametoindex

2187

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

2188

3202

if zeroconf:

3203

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

3204

service = AvahiServiceToSyslog(

3205

name=server_settings["servicename"],

3206

servicetype="_mandos._tcp",

3207

protocol=protocol,

3208

bus=bus)

3209

if server_settings["interface"]:

3210

service.interface = if_nametoindex(

3211

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

3212

2189

3213

global multiprocessing_manager

2190

3214

multiprocessing_manager = multiprocessing.Manager()

2191

3215

2192

3216

client_class = Client

2193

3217

if use_dbus:

2194

client_class = functools.partial(ClientDBusTransitional,

2195

bus = bus)

2196

3218

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

3219

2197

3220

client_settings = Client.config_parser(client_config)

2198

3221

old_client_settings = {}

2199

3222

clients_data = {}

2200

3223

3224

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

3225

global wnull

3226

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

3227

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

3228

# mode

3229

if debug or not foreground:

3230

wnull.close()

3231

2201

3232

# Get client data and settings from last running state.

2202

3233

if server_settings["restore"]:

2203

3234

try:

2204

3235

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

2205

clients_data, old_client_settings = (pickle.load

2206

(stored_state))

3236

if sys.version_info.major == 2:

3237

clients_data, old_client_settings = pickle.load(

3238

stored_state)

3239

else:

3240

bytes_clients_data, bytes_old_client_settings = (

3241

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

3242

# Fix bytes to strings

3243

# clients_data

3244

# .keys()

3245

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

3246

if isinstance(key, bytes)

3247

else key): value

3248

for key, value in

3249

bytes_clients_data.items()}

3250

del bytes_clients_data

3251

for key in clients_data:

3252

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

3253

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

3254

for k, v in

3255

clients_data[key].items()}

3256

clients_data[key] = value

3257

# .client_structure

3258

value["client_structure"] = [

3259

(s.decode("utf-8")

3260

if isinstance(s, bytes)

3261

else s) for s in

3262

value["client_structure"]]

3263

# .name, .host, and .checker_command

3264

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

3265

if isinstance(value[k], bytes):

3266

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

3267

if "key_id" not in value:

3268

value["key_id"] = ""

3269

elif "fingerprint" not in value:

3270

value["fingerprint"] = ""

3271

# old_client_settings

3272

# .keys()

3273

old_client_settings = {

3274

(key.decode("utf-8")

3275

if isinstance(key, bytes)

3276

else key): value

3277

for key, value in

3278

bytes_old_client_settings.items()}

3279

del bytes_old_client_settings

3280

# .host and .checker_command

3281

for value in old_client_settings.values():

3282

for attribute in ("host", "checker_command"):

3283

if isinstance(value[attribute], bytes):

3284

value[attribute] = (value[attribute]

3285

.decode("utf-8"))

2207

3286

os.remove(stored_state_path)

2208

3287

except IOError as e:

2209

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

2210

.format(e))

2211

if e.errno != errno.ENOENT:

3288

if e.errno == errno.ENOENT:

3289

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

3290

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

3291

else:

3292

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

3293

exc_info=e)

2212

3294

raise

2213

3295

except EOFError as e:

2214

3296

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

2215

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

2216

3297

"EOFError:",

3298

exc_info=e)

3299

2217

3300

with PGPEngine() as pgp:

2218

for client_name, client in clients_data.iteritems():

3301

for client_name, client in clients_data.items():

3302

# Skip removed clients

3303

if client_name not in client_settings:

3304

continue

3305

2219

3306

# Decide which value to use after restoring saved state.

2220

3307

# We have three different values: Old config file,

2221

3308

# new config file, and saved state.

2226

3313

# For each value in new config, check if it

2227

3314

# differs from the old config value (Except for

2228

3315

# the "secret" attribute)

2229

if (name != "secret" and

2230

value != old_client_settings[client_name]

2231

[name]):

3316

if (name != "secret"

3317

and (value !=

3318

old_client_settings[client_name][name])):

2232

3319

client[name] = value

2233

3320

except KeyError:

2234

3321

pass

2235

3322

2236

3323

# Clients who has passed its expire date can still be

2237

# enabled if its last checker was successful. Clients

3324

# enabled if its last checker was successful. A Client

2238

3325

# whose checker succeeded before we stored its state is

2239

3326

# assumed to have successfully run all checkers during

2240

3327

# downtime.

2242

3329

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

2243

3330

if not client["last_checked_ok"]:

2244

3331

logger.warning(

2245

"disabling client {0} - Client never "

2246

"performed a successful checker"

2247

.format(client_name))

3332

"disabling client {} - Client never "

3333

"performed a successful checker".format(

3334

client_name))

2248

3335

client["enabled"] = False

2249

3336

elif client["last_checker_status"] != 0:

2250

3337

logger.warning(

2251

"disabling client {0} - Client "

2252

"last checker failed with error code {1}"

2253

.format(client_name,

2254

client["last_checker_status"]))

3338

"disabling client {} - Client last"

3339

" checker failed with error code"

3340

" {}".format(

3341

client_name,

3342

client["last_checker_status"]))

2255

3343

client["enabled"] = False

2256

3344

else:

2257

client["expires"] = (datetime.datetime

2258

.utcnow()

2259

+ client["timeout"])

3345

client["expires"] = (

3346

datetime.datetime.utcnow()

3347

+ client["timeout"])

2260

3348

logger.debug("Last checker succeeded,"

2261

" keeping {0} enabled"

2262

.format(client_name))

3349

" keeping {} enabled".format(

3350

client_name))

2263

3351

try:

2264

client["secret"] = (

2265

pgp.decrypt(client["encrypted_secret"],

2266

client_settings[client_name]

2267

["secret"]))

3352

client["secret"] = pgp.decrypt(

3353

client["encrypted_secret"],

3354

client_settings[client_name]["secret"])

2268

3355

except PGPError:

2269

3356

# If decryption fails, we use secret from new settings

2270

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

2271

.format(client_name))

2272

client["secret"] = (

2273

client_settings[client_name]["secret"])

3357

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

3358

client_name))

3359

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

3360

["secret"])

2274

3361

2275

2276

3362

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

2277

3363

for client_name in (set(old_client_settings)

2278

3364

- set(client_settings)):

2282

3368

clients_data[client_name] = client_settings[client_name]

2283

3369

2284

3370

# Create all client objects

2285

for client_name, client in clients_data.iteritems():

3371

for client_name, client in clients_data.items():

2286

3372

tcp_server.clients[client_name] = client_class(

2287

name = client_name, settings = client)

2288

3373

name=client_name,

3374

settings=client,

3375

server_settings=server_settings)

3376

2289

3377

if not tcp_server.clients:

2290

3378

logger.warning("No clients defined")

2291

2292

if not debug:

2293

try:

2294

with pidfile:

2295

pid = os.getpid()

2296

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

2297

del pidfile

2298

except IOError:

2299

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

2300

pidfilename, pid)

2301

except NameError:

2302

# "pidfile" was never created

2303

pass

3379

3380

if not foreground:

3381

if pidfile is not None:

3382

pid = os.getpid()

3383

try:

3384

with pidfile:

3385

print(pid, file=pidfile)

3386

except IOError:

3387

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

3388

pidfilename, pid)

3389

del pidfile

2304

3390

del pidfilename

2305

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

2306

2307

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

2308

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

2309

3391

3392

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

3393

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3394

lambda: main_loop.quit() and False)

3395

2310

3396

if use_dbus:

2311

class MandosDBusService(dbus.service.Object):

3397

3398

@alternate_dbus_interfaces(

3399

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

3400

class MandosDBusService(DBusObjectWithObjectManager):

2312

3401

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

3402

2313

3403

def __init__(self):

2314

3404

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

3405

2315

3406

_interface = "se.recompile.Mandos"

2316

3407

2317

3408

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

2318

3409

def ClientAdded(self, objpath):

2319

3410

"D-Bus signal"

2320

3411

pass

2321

3412

2322

3413

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

2323

def ClientNotFound(self, fingerprint, address):

3414

def ClientNotFound(self, key_id, address):

2324

3415

"D-Bus signal"

2325

3416

pass

2326

3417

3418

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

3419

"true"})

2327

3420

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

2328

3421

def ClientRemoved(self, objpath, name):

2329

3422

"D-Bus signal"

2330

3423

pass

2331

3424

3425

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

3426

"true"})

2332

3427

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

2333

3428

def GetAllClients(self):

2334

3429

"D-Bus method"

2335

return dbus.Array(c.dbus_object_path

2336

for c in

2337

tcp_server.clients.itervalues())

2338

3430

return dbus.Array(c.dbus_object_path for c in

3431

tcp_server.clients.values())

3432

3433

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

3434

"true"})

2339

3435

@dbus.service.method(_interface,

2340

3436

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

2341

3437

def GetAllClientsWithProperties(self):

2342

3438

"D-Bus method"

2343

3439

return dbus.Dictionary(

2344

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

2345

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

3440

{c.dbus_object_path: c.GetAll(

3441

"se.recompile.Mandos.Client")

3442

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

2346

3443

signature="oa{sv}")

2347

3444

2348

3445

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

2349

3446

def RemoveClient(self, object_path):

2350

3447

"D-Bus method"

2351

for c in tcp_server.clients.itervalues():

3448

for c in tcp_server.clients.values():

2352

3449

if c.dbus_object_path == object_path:

2353

3450

del tcp_server.clients[c.name]

2354

3451

c.remove_from_connection()

2355

# Don't signal anything except ClientRemoved

3452

# Don't signal the disabling

2356

3453

c.disable(quiet=True)

2357

# Emit D-Bus signal

2358

self.ClientRemoved(object_path, c.name)

3454

# Emit D-Bus signal for removal

3455

self.client_removed_signal(c)

2359

3456

return

2360

3457

raise KeyError(object_path)

2361

3458

2362

3459

del _interface

2363

2364

class MandosDBusServiceTransitional(MandosDBusService):

2365

__metaclass__ = AlternateDBusNamesMetaclass

2366

mandos_dbus_service = MandosDBusServiceTransitional()

2367

3460

3461

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3462

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

3463

def GetManagedObjects(self):

3464

"""D-Bus method"""

3465

return dbus.Dictionary(

3466

{client.dbus_object_path:

3467

dbus.Dictionary(

3468

{interface: client.GetAll(interface)

3469

for interface in

3470

client._get_all_interface_names()})

3471

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

3472

3473

def client_added_signal(self, client):

3474

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

3475

if use_dbus:

3476

# New standard signal

3477

self.InterfacesAdded(

3478

client.dbus_object_path,

3479

dbus.Dictionary(

3480

{interface: client.GetAll(interface)

3481

for interface in

3482

client._get_all_interface_names()}))

3483

# Old signal

3484

self.ClientAdded(client.dbus_object_path)

3485

3486

def client_removed_signal(self, client):

3487

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

3488

if use_dbus:

3489

# New standard signal

3490

self.InterfacesRemoved(

3491

client.dbus_object_path,

3492

client._get_all_interface_names())

3493

# Old signal

3494

self.ClientRemoved(client.dbus_object_path,

3495

client.name)

3496

3497

mandos_dbus_service = MandosDBusService()

3498

3499

# Save modules to variables to exempt the modules from being

3500

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

3501

mp = multiprocessing

3502

wn = wnull

3503

2368

3504

def cleanup():

2369

3505

"Cleanup function; run on exit"

2370

service.cleanup()

2371

2372

multiprocessing.active_children()

3506

if zeroconf:

3507

service.cleanup()

3508

3509

mp.active_children()

3510

wn.close()

2373

3511

if not (tcp_server.clients or client_settings):

2374

3512

return

2375

3513

2376

3514

# Store client before exiting. Secrets are encrypted with key

2377

3515

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

2378

3516

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

2379

3517

clients = {}

2380

3518

with PGPEngine() as pgp:

2381

for client in tcp_server.clients.itervalues():

3519

for client in tcp_server.clients.values():

2382

3520

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

2383

3521

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

2384

3522

key)

2385

3523

client_dict = {}

2386

3524

2387

3525

# A list of attributes that can not be pickled

2388

3526

# + secret.

2389

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

2390

"checker"))

2391

for name, typ in (inspect.getmembers

2392

(dbus.service.Object)):

3527

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

3528

"checker", "server_settings"}

3529

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

3530

.Object):

2393

3531

exclude.add(name)

2394

3532

2395

3533

client_dict["encrypted_secret"] = (client

2396

3534

.encrypted_secret)

2397

3535

for attr in client.client_structure:

2398

3536

if attr not in exclude:

2399

3537

client_dict[attr] = getattr(client, attr)

2400

3538

2401

3539

clients[client.name] = client_dict

2402

3540

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

2403

3541

2404

3542

try:

2405

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

2406

prefix="clients-",

2407

dir=os.path.dirname

2408

(stored_state_path))

2409

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

2410

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

3543

with tempfile.NamedTemporaryFile(

3544

mode='wb',

3545

suffix=".pickle",

3546

prefix='clients-',

3547

dir=os.path.dirname(stored_state_path),

3548

delete=False) as stored_state:

3549

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

3550

protocol=2)

3551

tempname = stored_state.name

2411

3552

os.rename(tempname, stored_state_path)

2412

3553

except (IOError, OSError) as e:

2413

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

2414

.format(e))

2415

3554

if not debug:

2416

3555

try:

2417

3556

os.remove(tempname)

2418

3557

except NameError:

2419

3558

pass

2420

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

2421

errno.EEXIST)):

2422

raise e

2423

3559

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

3560

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

3561

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

3562

else:

3563

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

3564

exc_info=e)

3565

raise

3566

2424

3567

# Delete all clients, and settings from config

2425

3568

while tcp_server.clients:

2426

3569

name, client = tcp_server.clients.popitem()

2427

3570

if use_dbus:

2428

3571

client.remove_from_connection()

2429

# Don't signal anything except ClientRemoved

3572

# Don't signal the disabling

2430

3573

client.disable(quiet=True)

3574

# Emit D-Bus signal for removal

2431

3575

if use_dbus:

2432

# Emit D-Bus signal

2433

mandos_dbus_service.ClientRemoved(client

2434

.dbus_object_path,

2435

client.name)

3576

mandos_dbus_service.client_removed_signal(client)

2436

3577

client_settings.clear()

2437

3578

2438

3579

atexit.register(cleanup)

2439

2440

for client in tcp_server.clients.itervalues():

3580

3581

for client in tcp_server.clients.values():

2441

3582

if use_dbus:

2442

# Emit D-Bus signal

2443

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3583

# Emit D-Bus signal for adding

3584

mandos_dbus_service.client_added_signal(client)

2444

3585

# Need to initiate checking of clients

2445

3586

if client.enabled:

2446

3587

client.init_checker()

2447

3588

2448

3589

tcp_server.enable()

2449

3590

tcp_server.server_activate()

2450

3591

2451

3592

# Find out what port we got

2452

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

3593

if zeroconf:

3594

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

2453

3595

if use_ipv6:

2454

3596

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

2455

" flowinfo %d, scope_id %d"

2456

% tcp_server.socket.getsockname())

3597

" flowinfo %d, scope_id %d",

3598

*tcp_server.socket.getsockname())

2457

3599

else: # IPv4

2458

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

2459

% tcp_server.socket.getsockname())

2460

2461

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

2462

3600

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

3601

*tcp_server.socket.getsockname())

3602

3603

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

3604

2463

3605

try:

2464

# From the Avahi example code

2465

try:

2466

service.activate()

2467

except dbus.exceptions.DBusException as error:

2468

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

2469

cleanup()

2470

sys.exit(1)

2471

# End of Avahi example code

2472

2473

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

2474

lambda *args, **kwargs:

2475

(tcp_server.handle_request

2476

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

2477

3606

if zeroconf:

3607

# From the Avahi example code

3608

try:

3609

service.activate()

3610

except dbus.exceptions.DBusException as error:

3611

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

3612

cleanup()

3613

sys.exit(1)

3614

# End of Avahi example code

3615

3616

GLib.io_add_watch(

3617

GLib.IOChannel.unix_new(tcp_server.fileno()),

3618

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

3619

lambda *args, **kwargs: (tcp_server.handle_request

3620

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

3621

2478

3622

logger.debug("Starting main loop")

2479

3623

main_loop.run()

2480

3624

except AvahiError as error:

2481

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

3625

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

2482

3626

cleanup()

2483

3627

sys.exit(1)

2484

3628

except KeyboardInterrupt:

2489

3633

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

2490

3634

cleanup()

2491

3635

3636

3637

def should_only_run_tests():

3638

parser = argparse.ArgumentParser(add_help=False)

3639

parser.add_argument("--check", action='store_true')

3640

args, unknown_args = parser.parse_known_args()

3641

run_tests = args.check

3642

if run_tests:

3643

# Remove --check argument from sys.argv

3644

sys.argv[1:] = unknown_args

3645

return run_tests

3646

3647

# Add all tests from doctest strings

3648

def load_tests(loader, tests, none):

3649

import doctest

3650

tests.addTests(doctest.DocTestSuite())

3651

return tests

3652

2492

3653

if __name__ == '__main__':

2493

main()

3654

try:

3655

if should_only_run_tests():

3656

# Call using ./mandos --check [--verbose]

3657

unittest.main()

3658

else:

3659

main()

3660

finally:

3661

logging.shutdown()