/mandos/trunk : revision 1218

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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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from future_builtins import *

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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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import SocketServer as socketserver

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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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66

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 shlex

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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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# Add shlex.quote if it does not exist

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try:

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shlex.quote

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except AttributeError:

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shlex.quote = re.escape

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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 = "1.5.4"

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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 = "1.8.11"

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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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183

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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"])

219

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):

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self._cleanup()

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return False

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def __del__(self):

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self._cleanup()

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244

161

245

def _cleanup(self):

162

246

if self.tempdir is not None:

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# Delete contents of tempdir

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

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topdown = False):

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topdown=False):

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for filename in files:

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

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for dirname in dirs:

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# Remove tempdir

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os.rmdir(self.tempdir)

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self.tempdir = None

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257

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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, "w") as devnull:

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try:

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

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

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attach_fhs={'stderr': devnull})

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

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f.write(data)

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

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ciphertext = f.read()

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proc.wait()

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except IOError as e:

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raise PGPError(e)

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self.gnupg.passphrase = None

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE,

281

stderr=subprocess.PIPE)

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

283

if proc.returncode != 0:

284

raise PGPError(err)

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return ciphertext

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286

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def decrypt(self, data, password):

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

198

with open(os.devnull, "w") as devnull:

199

try:

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

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

202

attach_fhs={'stderr': devnull})

203

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

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f.write(data)

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

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decrypted_plaintext = f.read()

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proc.wait()

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except IOError as e:

209

raise PGPError(e)

210

self.gnupg.passphrase = None

288

passphrase = self.password_encode(password)

289

with tempfile.NamedTemporaryFile(

290

dir=self.tempdir) as passfile:

291

passfile.write(passphrase)

292

passfile.flush()

293

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

294

'--passphrase-file',

295

passfile.name]

296

+ self.gnupgargs,

297

stdin=subprocess.PIPE,

298

stdout=subprocess.PIPE,

299

stderr=subprocess.PIPE)

300

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

301

if proc.returncode != 0:

302

raise PGPError(err)

211

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return decrypted_plaintext

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304

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305

306

# Pretend that we have an Avahi module

307

class avahi:

308

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

309

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

310

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

311

PROTO_INET = 0 # avahi-common/address.h

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PROTO_INET6 = 1 # avahi-common/address.h

313

DBUS_NAME = "org.freedesktop.Avahi"

314

DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"

315

DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

316

DBUS_PATH_SERVER = "/"

317

318

@staticmethod

319

def string_array_to_txt_array(t):

320

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

321

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

322

ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h

323

ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h

324

ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h

325

SERVER_INVALID = 0 # avahi-common/defs.h

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SERVER_REGISTERING = 1 # avahi-common/defs.h

327

SERVER_RUNNING = 2 # avahi-common/defs.h

328

SERVER_COLLISION = 3 # avahi-common/defs.h

329

SERVER_FAILURE = 4 # avahi-common/defs.h

330

331

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332

class AvahiError(Exception):

215

333

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

216

334

self.value = value

217

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

218

def __unicode__(self):

219

return unicode(repr(self.value))

335

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

336

**kwargs)

337

220

338

221

339

class AvahiServiceError(AvahiError):

222

340

pass

223

341

342

224

343

class AvahiGroupError(AvahiError):

225

344

pass

226

345

227

346

228

class AvahiService(object):

347

class AvahiService:

229

348

"""An Avahi (Zeroconf) service.

230

349

231

350

Attributes:

232

351

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

233

352

Used to optionally bind to the specified interface.

234

353

name: string; Example: 'Mandos'

235

354

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

236

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

355

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

237

356

port: integer; what port to announce

238

357

TXT: list of strings; TXT record for the service

239

358

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

245

364

server: D-Bus Server

246

365

bus: dbus.SystemBus()

247

366

"""

248

249

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

250

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

251

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

252

protocol = avahi.PROTO_UNSPEC, bus = None):

367

368

def __init__(self,

369

interface=avahi.IF_UNSPEC,

370

name=None,

371

servicetype=None,

372

port=None,

373

TXT=None,

374

domain="",

375

host="",

376

max_renames=32768,

377

protocol=avahi.PROTO_UNSPEC,

378

bus=None):

253

379

self.interface = interface

254

380

self.name = name

255

381

self.type = servicetype

264

390

self.server = None

265

391

self.bus = bus

266

392

self.entry_group_state_changed_match = None

267

268

def rename(self):

393

394

def rename(self, remove=True):

269

395

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

270

396

if self.rename_count >= self.max_renames:

271

397

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

272

398

" after %i retries, exiting.",

273

399

self.rename_count)

274

400

raise AvahiServiceError("Too many renames")

275

self.name = unicode(self.server

276

.GetAlternativeServiceName(self.name))

401

self.name = str(

402

self.server.GetAlternativeServiceName(self.name))

403

self.rename_count += 1

277

404

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

278

405

self.name)

279

self.remove()

406

if remove:

407

self.remove()

280

408

try:

281

409

self.add()

282

410

except dbus.exceptions.DBusException as error:

283

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

284

self.cleanup()

285

os._exit(1)

286

self.rename_count += 1

287

411

if (error.get_dbus_name()

412

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

413

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

414

return self.rename(remove=False)

415

else:

416

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

417

self.cleanup()

418

os._exit(1)

419

288

420

def remove(self):

289

421

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

290

422

if self.entry_group_state_changed_match is not None:

292

424

self.entry_group_state_changed_match = None

293

425

if self.group is not None:

294

426

self.group.Reset()

295

427

296

428

def add(self):

297

429

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

298

430

self.remove()

315

447

dbus.UInt16(self.port),

316

448

avahi.string_array_to_txt_array(self.TXT))

317

449

self.group.Commit()

318

450

319

451

def entry_group_state_changed(self, state, error):

320

452

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

321

453

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

322

454

323

455

if state == avahi.ENTRY_GROUP_ESTABLISHED:

324

456

logger.debug("Zeroconf service established.")

325

457

elif state == avahi.ENTRY_GROUP_COLLISION:

327

459

self.rename()

328

460

elif state == avahi.ENTRY_GROUP_FAILURE:

329

461

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

330

unicode(error))

331

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

332

.format(error))

333

462

str(error))

463

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

464

334

465

def cleanup(self):

335

466

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

336

467

if self.group is not None:

341

472

pass

342

473

self.group = None

343

474

self.remove()

344

475

345

476

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

346

477

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

347

478

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

348

bad_states = { avahi.SERVER_INVALID:

349

"Zeroconf server invalid",

350

avahi.SERVER_REGISTERING: None,

351

avahi.SERVER_COLLISION:

352

"Zeroconf server name collision",

353

avahi.SERVER_FAILURE:

354

"Zeroconf server failure" }

479

bad_states = {

480

avahi.SERVER_INVALID: "Zeroconf server invalid",

481

avahi.SERVER_REGISTERING: None,

482

avahi.SERVER_COLLISION: "Zeroconf server name collision",

483

avahi.SERVER_FAILURE: "Zeroconf server failure",

484

}

355

485

if state in bad_states:

356

486

if bad_states[state] is not None:

357

487

if error is None:

360

490

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

361

491

self.cleanup()

362

492

elif state == avahi.SERVER_RUNNING:

363

self.add()

493

try:

494

self.add()

495

except dbus.exceptions.DBusException as error:

496

if (error.get_dbus_name()

497

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

498

logger.info("Local Zeroconf service name"

499

" collision.")

500

return self.rename(remove=False)

501

else:

502

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

503

self.cleanup()

504

os._exit(1)

364

505

else:

365

506

if error is None:

366

507

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

367

508

else:

368

509

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

369

510

370

511

def activate(self):

371

512

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

372

513

if self.server is None:

376

517

follow_name_owner_changes=True),

377

518

avahi.DBUS_INTERFACE_SERVER)

378

519

self.server.connect_to_signal("StateChanged",

379

self.server_state_changed)

520

self.server_state_changed)

380

521

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

381

522

382

523

383

524

class AvahiServiceToSyslog(AvahiService):

384

def rename(self):

525

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

385

526

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

386

ret = AvahiService.rename(self)

387

syslogger.setFormatter(logging.Formatter

388

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

389

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

390

.format(self.name)))

527

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

528

syslogger.setFormatter(logging.Formatter(

529

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

530

.format(self.name)))

391

531

return ret

392

532

393

533

394

def timedelta_to_milliseconds(td):

395

"Convert a datetime.timedelta() to milliseconds"

396

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

397

+ (td.seconds * 1000)

398

+ (td.microseconds // 1000))

399

400

401

class Client(object):

534

# Pretend that we have a GnuTLS module

535

class gnutls:

536

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

537

538

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

539

if library is None:

540

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

541

_library = ctypes.cdll.LoadLibrary(library)

542

del library

543

544

# Unless otherwise indicated, the constants and types below are

545

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

546

547

# Constants

548

E_SUCCESS = 0

549

E_INTERRUPTED = -52

550

E_AGAIN = -28

551

CRT_OPENPGP = 2

552

CRT_RAWPK = 3

553

CLIENT = 2

554

SHUT_RDWR = 0

555

CRD_CERTIFICATE = 1

556

E_NO_CERTIFICATE_FOUND = -49

557

X509_FMT_DER = 0

558

NO_TICKETS = 1<<10

559

ENABLE_RAWPK = 1<<18

560

CTYPE_PEERS = 3

561

KEYID_USE_SHA256 = 1 # gnutls/x509.h

562

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

563

564

# Types

565

class session_int(ctypes.Structure):

566

_fields_ = []

567

session_t = ctypes.POINTER(session_int)

568

569

class certificate_credentials_st(ctypes.Structure):

570

_fields_ = []

571

certificate_credentials_t = ctypes.POINTER(

572

certificate_credentials_st)

573

certificate_type_t = ctypes.c_int

574

575

class datum_t(ctypes.Structure):

576

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

577

('size', ctypes.c_uint)]

578

579

class openpgp_crt_int(ctypes.Structure):

580

_fields_ = []

581

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

582

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

583

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

584

credentials_type_t = ctypes.c_int

585

transport_ptr_t = ctypes.c_void_p

586

close_request_t = ctypes.c_int

587

588

# Exceptions

589

class Error(Exception):

590

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

591

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

592

# code is passed, convert it to a string with

593

# gnutls.strerror()

594

self.code = code

595

if message is None and code is not None:

596

message = gnutls.strerror(code)

597

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

598

message, *args)

599

600

class CertificateSecurityError(Error):

601

pass

602

603

# Classes

604

class Credentials:

605

def __init__(self):

606

self._c_object = gnutls.certificate_credentials_t()

607

gnutls.certificate_allocate_credentials(

608

ctypes.byref(self._c_object))

609

self.type = gnutls.CRD_CERTIFICATE

610

611

def __del__(self):

612

gnutls.certificate_free_credentials(self._c_object)

613

614

class ClientSession:

615

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

616

self._c_object = gnutls.session_t()

617

gnutls_flags = gnutls.CLIENT

618

if gnutls.check_version(b"3.5.6"):

619

gnutls_flags |= gnutls.NO_TICKETS

620

if gnutls.has_rawpk:

621

gnutls_flags |= gnutls.ENABLE_RAWPK

622

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

623

del gnutls_flags

624

gnutls.set_default_priority(self._c_object)

625

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

626

gnutls.handshake_set_private_extensions(self._c_object,

627

True)

628

self.socket = socket

629

if credentials is None:

630

credentials = gnutls.Credentials()

631

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

632

ctypes.cast(credentials._c_object,

633

ctypes.c_void_p))

634

self.credentials = credentials

635

636

def __del__(self):

637

gnutls.deinit(self._c_object)

638

639

def handshake(self):

640

return gnutls.handshake(self._c_object)

641

642

def send(self, data):

643

data = bytes(data)

644

data_len = len(data)

645

while data_len > 0:

646

data_len -= gnutls.record_send(self._c_object,

647

data[-data_len:],

648

data_len)

649

650

def bye(self):

651

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

652

653

# Error handling functions

654

def _error_code(result):

655

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

656

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

657

if result >= 0:

658

return result

659

if result == gnutls.E_NO_CERTIFICATE_FOUND:

660

raise gnutls.CertificateSecurityError(code=result)

661

raise gnutls.Error(code=result)

662

663

def _retry_on_error(result, func, arguments):

664

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

665

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

666

while result < 0:

667

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

668

return _error_code(result)

669

result = func(*arguments)

670

return result

671

672

# Unless otherwise indicated, the function declarations below are

673

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

674

675

# Functions

676

priority_set_direct = _library.gnutls_priority_set_direct

677

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

678

ctypes.POINTER(ctypes.c_char_p)]

679

priority_set_direct.restype = _error_code

680

681

init = _library.gnutls_init

682

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

683

init.restype = _error_code

684

685

set_default_priority = _library.gnutls_set_default_priority

686

set_default_priority.argtypes = [session_t]

687

set_default_priority.restype = _error_code

688

689

record_send = _library.gnutls_record_send

690

record_send.argtypes = [session_t, ctypes.c_void_p,

691

ctypes.c_size_t]

692

record_send.restype = ctypes.c_ssize_t

693

record_send.errcheck = _retry_on_error

694

695

certificate_allocate_credentials = (

696

_library.gnutls_certificate_allocate_credentials)

697

certificate_allocate_credentials.argtypes = [

698

ctypes.POINTER(certificate_credentials_t)]

699

certificate_allocate_credentials.restype = _error_code

700

701

certificate_free_credentials = (

702

_library.gnutls_certificate_free_credentials)

703

certificate_free_credentials.argtypes = [

704

certificate_credentials_t]

705

certificate_free_credentials.restype = None

706

707

handshake_set_private_extensions = (

708

_library.gnutls_handshake_set_private_extensions)

709

handshake_set_private_extensions.argtypes = [session_t,

710

ctypes.c_int]

711

handshake_set_private_extensions.restype = None

712

713

credentials_set = _library.gnutls_credentials_set

714

credentials_set.argtypes = [session_t, credentials_type_t,

715

ctypes.c_void_p]

716

credentials_set.restype = _error_code

717

718

strerror = _library.gnutls_strerror

719

strerror.argtypes = [ctypes.c_int]

720

strerror.restype = ctypes.c_char_p

721

722

certificate_type_get = _library.gnutls_certificate_type_get

723

certificate_type_get.argtypes = [session_t]

724

certificate_type_get.restype = _error_code

725

726

certificate_get_peers = _library.gnutls_certificate_get_peers

727

certificate_get_peers.argtypes = [session_t,

728

ctypes.POINTER(ctypes.c_uint)]

729

certificate_get_peers.restype = ctypes.POINTER(datum_t)

730

731

global_set_log_level = _library.gnutls_global_set_log_level

732

global_set_log_level.argtypes = [ctypes.c_int]

733

global_set_log_level.restype = None

734

735

global_set_log_function = _library.gnutls_global_set_log_function

736

global_set_log_function.argtypes = [log_func]

737

global_set_log_function.restype = None

738

739

deinit = _library.gnutls_deinit

740

deinit.argtypes = [session_t]

741

deinit.restype = None

742

743

handshake = _library.gnutls_handshake

744

handshake.argtypes = [session_t]

745

handshake.restype = _error_code

746

handshake.errcheck = _retry_on_error

747

748

transport_set_ptr = _library.gnutls_transport_set_ptr

749

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

750

transport_set_ptr.restype = None

751

752

bye = _library.gnutls_bye

753

bye.argtypes = [session_t, close_request_t]

754

bye.restype = _error_code

755

bye.errcheck = _retry_on_error

756

757

check_version = _library.gnutls_check_version

758

check_version.argtypes = [ctypes.c_char_p]

759

check_version.restype = ctypes.c_char_p

760

761

_need_version = b"3.3.0"

762

if check_version(_need_version) is None:

763

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

764

.format(_need_version))

765

766

_tls_rawpk_version = b"3.6.6"

767

has_rawpk = bool(check_version(_tls_rawpk_version))

768

769

if has_rawpk:

770

# Types

771

class pubkey_st(ctypes.Structure):

772

_fields = []

773

pubkey_t = ctypes.POINTER(pubkey_st)

774

775

x509_crt_fmt_t = ctypes.c_int

776

777

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

778

pubkey_init = _library.gnutls_pubkey_init

779

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

780

pubkey_init.restype = _error_code

781

782

pubkey_import = _library.gnutls_pubkey_import

783

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

784

x509_crt_fmt_t]

785

pubkey_import.restype = _error_code

786

787

pubkey_get_key_id = _library.gnutls_pubkey_get_key_id

788

pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,

789

ctypes.POINTER(ctypes.c_ubyte),

790

ctypes.POINTER(ctypes.c_size_t)]

791

pubkey_get_key_id.restype = _error_code

792

793

pubkey_deinit = _library.gnutls_pubkey_deinit

794

pubkey_deinit.argtypes = [pubkey_t]

795

pubkey_deinit.restype = None

796

else:

797

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

798

799

openpgp_crt_init = _library.gnutls_openpgp_crt_init

800

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

801

openpgp_crt_init.restype = _error_code

802

803

openpgp_crt_import = _library.gnutls_openpgp_crt_import

804

openpgp_crt_import.argtypes = [openpgp_crt_t,

805

ctypes.POINTER(datum_t),

806

openpgp_crt_fmt_t]

807

openpgp_crt_import.restype = _error_code

808

809

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

810

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

811

ctypes.POINTER(ctypes.c_uint)]

812

openpgp_crt_verify_self.restype = _error_code

813

814

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

815

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

816

openpgp_crt_deinit.restype = None

817

818

openpgp_crt_get_fingerprint = (

819

_library.gnutls_openpgp_crt_get_fingerprint)

820

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

821

ctypes.c_void_p,

822

ctypes.POINTER(

823

ctypes.c_size_t)]

824

openpgp_crt_get_fingerprint.restype = _error_code

825

826

if check_version(b"3.6.4"):

827

certificate_type_get2 = _library.gnutls_certificate_type_get2

828

certificate_type_get2.argtypes = [session_t, ctypes.c_int]

829

certificate_type_get2.restype = _error_code

830

831

# Remove non-public functions

832

del _error_code, _retry_on_error

833

834

835

def call_pipe(connection, # : multiprocessing.Connection

836

func, *args, **kwargs):

837

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

838

839

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

840

return value on the provided multiprocessing.Connection.

841

"""

842

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

843

connection.close()

844

845

846

class Client:

402

847

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

403

848

404

849

Attributes:

405

850

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

406

851

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

407

852

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

408

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

409

to see if the client lives.

410

'None' if no process is running.

411

checker_callback_tag: a gobject event source tag, or None

853

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

854

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

855

running.

856

checker_callback_tag: a GLib event source tag, or None

412

857

checker_command: string; External command which is run to check

413

858

if client lives. %() expansions are done at

414

859

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

415

860

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

416

checker_initiator_tag: a gobject event source tag, or None

861

checker_initiator_tag: a GLib event source tag, or None

417

862

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

418

863

client_structure: Object describing what attributes a client has

419

864

and is used for storing the client at exit

420

865

current_checker_command: string; current running checker_command

421

disable_initiator_tag: a gobject event source tag, or None

866

disable_initiator_tag: a GLib event source tag, or None

422

867

enabled: bool()

423

868

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

424

uniquely identify the client

869

uniquely identify an OpenPGP client

870

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

871

a client using raw public keys

425

872

host: string; available for use by the checker command

426

873

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

427

874

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

429

876

last_checker_status: integer between 0 and 255 reflecting exit

430

877

status of last checker. -1 reflects crashed

431

878

checker, -2 means no checker completed yet.

879

last_checker_signal: The signal which killed the last checker, if

880

last_checker_status is -1

432

881

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

433

882

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

434

883

D-Bus identifiers

439

888

runtime_expansions: Allowed attributes for runtime expansion.

440

889

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

441

890

disabled, or None

891

server_settings: The server_settings dict from main()

442

892

"""

443

893

444

894

runtime_expansions = ("approval_delay", "approval_duration",

445

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

895

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

446

896

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

447

897

"last_approval_request", "last_checked_ok",

448

898

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

449

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

450

"extended_timeout": "15m",

451

"interval": "2m",

452

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

453

"host": "",

454

"approval_delay": "0s",

455

"approval_duration": "1s",

456

"approved_by_default": "True",

457

"enabled": "True",

458

}

459

460

def timeout_milliseconds(self):

461

"Return the 'timeout' attribute in milliseconds"

462

return timedelta_to_milliseconds(self.timeout)

463

464

def extended_timeout_milliseconds(self):

465

"Return the 'extended_timeout' attribute in milliseconds"

466

return timedelta_to_milliseconds(self.extended_timeout)

467

468

def interval_milliseconds(self):

469

"Return the 'interval' attribute in milliseconds"

470

return timedelta_to_milliseconds(self.interval)

471

472

def approval_delay_milliseconds(self):

473

return timedelta_to_milliseconds(self.approval_delay)

474

899

client_defaults = {

900

"timeout": "PT5M",

901

"extended_timeout": "PT15M",

902

"interval": "PT2M",

903

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

904

"host": "",

905

"approval_delay": "PT0S",

906

"approval_duration": "PT1S",

907

"approved_by_default": "True",

908

"enabled": "True",

909

}

910

475

911

@staticmethod

476

912

def config_parser(config):

477

913

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

484

920

for client_name in config.sections():

485

921

section = dict(config.items(client_name))

486

922

client = settings[client_name] = {}

487

923

488

924

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

489

925

# Reformat values from string types to Python types

490

926

client["approved_by_default"] = config.getboolean(

491

927

client_name, "approved_by_default")

492

928

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

493

929

"enabled")

494

930

931

# Uppercase and remove spaces from key_id and fingerprint

932

# for later comparison purposes with return value from the

933

# key_id() and fingerprint() functions

934

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

935

.replace(" ", ""))

495

936

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

496

937

.replace(" ", ""))

497

938

if "secret" in section:

498

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

939

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

940

.encode("utf-8"),

941

"base64")

499

942

elif "secfile" in section:

500

943

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

501

944

(section["secfile"])),

502

945

"rb") as secfile:

503

946

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

504

947

else:

505

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

948

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

506

949

.format(section))

507

950

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

508

951

client["extended_timeout"] = string_to_delta(

516

959

client["last_approval_request"] = None

517

960

client["last_checked_ok"] = None

518

961

client["last_checker_status"] = -2

519

962

520

963

return settings

521

522

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

964

965

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

523

966

self.name = name

967

if server_settings is None:

968

server_settings = {}

969

self.server_settings = server_settings

524

970

# adding all client settings

525

for setting, value in settings.iteritems():

971

for setting, value in settings.items():

526

972

setattr(self, setting, value)

527

973

528

974

if self.enabled:

529

975

if not hasattr(self, "last_enabled"):

530

976

self.last_enabled = datetime.datetime.utcnow()

534

980

else:

535

981

self.last_enabled = None

536

982

self.expires = None

537

983

538

984

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

539

# Uppercase and remove spaces from fingerprint for later

540

# comparison purposes with return value from the fingerprint()

541

# function

985

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

542

986

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

543

987

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

544

988

datetime.datetime.utcnow())

545

989

546

990

# attributes specific for this server instance

547

991

self.checker = None

548

992

self.checker_initiator_tag = None

551

995

self.current_checker_command = None

552

996

self.approved = None

553

997

self.approvals_pending = 0

554

self.changedstate = (multiprocessing_manager

555

.Condition(multiprocessing_manager

556

.Lock()))

557

self.client_structure = [attr for attr in

558

self.__dict__.iterkeys()

998

self.changedstate = multiprocessing_manager.Condition(

999

multiprocessing_manager.Lock())

1000

self.client_structure = [attr

1001

for attr in self.__dict__.keys()

559

1002

if not attr.startswith("_")]

560

1003

self.client_structure.append("client_structure")

561

562

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

563

lambda obj:

564

isinstance(obj,

565

property)):

1004

1005

for name, t in inspect.getmembers(

1006

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

566

1007

if not name.startswith("_"):

567

1008

self.client_structure.append(name)

568

1009

569

1010

# Send notice to process children that client state has changed

570

1011

def send_changedstate(self):

571

1012

with self.changedstate:

572

1013

self.changedstate.notify_all()

573

1014

574

1015

def enable(self):

575

1016

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

576

1017

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

581

1022

self.last_enabled = datetime.datetime.utcnow()

582

1023

self.init_checker()

583

1024

self.send_changedstate()

584

1025

585

1026

def disable(self, quiet=True):

586

1027

"""Disable this client."""

587

1028

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

589

1030

if not quiet:

590

1031

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

591

1032

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

592

gobject.source_remove(self.disable_initiator_tag)

1033

GLib.source_remove(self.disable_initiator_tag)

593

1034

self.disable_initiator_tag = None

594

1035

self.expires = None

595

1036

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

596

gobject.source_remove(self.checker_initiator_tag)

1037

GLib.source_remove(self.checker_initiator_tag)

597

1038

self.checker_initiator_tag = None

598

1039

self.stop_checker()

599

1040

self.enabled = False

600

1041

if not quiet:

601

1042

self.send_changedstate()

602

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

1043

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

603

1044

return False

604

1045

605

1046

def __del__(self):

606

1047

self.disable()

607

1048

608

1049

def init_checker(self):

609

1050

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

610

1051

# and every interval from then on.

611

1052

if self.checker_initiator_tag is not None:

612

gobject.source_remove(self.checker_initiator_tag)

613

self.checker_initiator_tag = (gobject.timeout_add

614

(self.interval_milliseconds(),

615

self.start_checker))

1053

GLib.source_remove(self.checker_initiator_tag)

1054

self.checker_initiator_tag = GLib.timeout_add(

1055

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

1056

+ 1)),

1057

self.start_checker)

616

1058

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

617

1059

if self.disable_initiator_tag is not None:

618

gobject.source_remove(self.disable_initiator_tag)

619

self.disable_initiator_tag = (gobject.timeout_add

620

(self.timeout_milliseconds(),

621

self.disable))

1060

GLib.source_remove(self.disable_initiator_tag)

1061

self.disable_initiator_tag = GLib.timeout_add(

1062

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

622

1063

# Also start a new checker *right now*.

623

1064

self.start_checker()

624

625

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

1065

1066

def checker_callback(self, source, condition, connection,

1067

command):

626

1068

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

1069

# Read return code from connection (see call_pipe)

1070

returncode = connection.recv()

1071

connection.close()

1072

if self.checker is not None:

1073

self.checker.join()

627

1074

self.checker_callback_tag = None

628

1075

self.checker = None

629

if os.WIFEXITED(condition):

630

self.last_checker_status = os.WEXITSTATUS(condition)

1076

1077

if returncode >= 0:

1078

self.last_checker_status = returncode

1079

self.last_checker_signal = None

631

1080

if self.last_checker_status == 0:

632

1081

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

633

1082

vars(self))

634

1083

self.checked_ok()

635

1084

else:

636

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

637

vars(self))

1085

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

638

1086

else:

639

1087

self.last_checker_status = -1

1088

self.last_checker_signal = -returncode

640

1089

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

641

1090

vars(self))

642

1091

return False

1092

643

1093

def checked_ok(self):

644

1094

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

645

1095

self.last_checked_ok = datetime.datetime.utcnow()

646

1096

self.last_checker_status = 0

1097

self.last_checker_signal = None

647

1098

self.bump_timeout()

648

1099

649

1100

def bump_timeout(self, timeout=None):

650

1101

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

651

1102

if timeout is None:

652

1103

timeout = self.timeout

653

1104

if self.disable_initiator_tag is not None:

654

gobject.source_remove(self.disable_initiator_tag)

1105

GLib.source_remove(self.disable_initiator_tag)

655

1106

self.disable_initiator_tag = None

656

1107

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

657

self.disable_initiator_tag = (gobject.timeout_add

658

(timedelta_to_milliseconds

659

(timeout), self.disable))

1108

self.disable_initiator_tag = GLib.timeout_add(

1109

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

660

1110

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

661

1111

662

1112

def need_approval(self):

663

1113

self.last_approval_request = datetime.datetime.utcnow()

664

1114

665

1115

def start_checker(self):

666

1116

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

667

1117

668

1118

If a checker already exists, leave it running and do

669

1119

nothing."""

670

1120

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

675

1125

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

676

1126

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

677

1127

# should be.

678

679

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

680

try:

681

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

682

except (AttributeError, OSError) as error:

683

if (isinstance(error, OSError)

684

and error.errno != errno.ECHILD):

685

raise error

686

else:

687

if pid:

688

logger.warning("Checker was a zombie")

689

gobject.source_remove(self.checker_callback_tag)

690

self.checker_callback(pid, status,

691

self.current_checker_command)

1128

1129

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

1130

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

1131

self.checker.join()

1132

self.checker = None

692

1133

# Start a new checker if needed

693

1134

if self.checker is None:

694

1135

# Escape attributes for the shell

695

escaped_attrs = dict(

696

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

697

for attr in

698

self.runtime_expansions)

1136

escaped_attrs = {

1137

attr: shlex.quote(str(getattr(self, attr)))

1138

for attr in self.runtime_expansions}

699

1139

try:

700

1140

command = self.checker_command % escaped_attrs

701

1141

except TypeError as error:

702

1142

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

703

self.checker_command, exc_info=error)

704

return True # Try again later

1143

self.checker_command,

1144

exc_info=error)

1145

return True # Try again later

705

1146

self.current_checker_command = command

706

try:

707

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

708

command, self.name)

709

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

710

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

711

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

712

# always replaced by /dev/null.)

713

self.checker = subprocess.Popen(command,

714

close_fds=True,

715

shell=True, cwd="/")

716

except OSError as error:

717

logger.error("Failed to start subprocess",

718

exc_info=error)

719

self.checker_callback_tag = (gobject.child_watch_add

720

(self.checker.pid,

721

self.checker_callback,

722

data=command))

723

# The checker may have completed before the gobject

724

# watch was added. Check for this.

725

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

726

if pid:

727

gobject.source_remove(self.checker_callback_tag)

728

self.checker_callback(pid, status, command)

729

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

1147

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

1148

self.name)

1149

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

1150

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

1151

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

1152

# always replaced by /dev/null.)

1153

# The exception is when not debugging but nevertheless

1154

# running in the foreground; use the previously

1155

# created wnull.

1156

popen_args = {"close_fds": True,

1157

"shell": True,

1158

"cwd": "/"}

1159

if (not self.server_settings["debug"]

1160

and self.server_settings["foreground"]):

1161

popen_args.update({"stdout": wnull,

1162

"stderr": wnull})

1163

pipe = multiprocessing.Pipe(duplex=False)

1164

self.checker = multiprocessing.Process(

1165

target=call_pipe,

1166

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

1167

kwargs=popen_args)

1168

self.checker.start()

1169

self.checker_callback_tag = GLib.io_add_watch(

1170

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

1171

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

1172

self.checker_callback, pipe[0], command)

1173

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

730

1174

return True

731

1175

732

1176

def stop_checker(self):

733

1177

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

734

1178

if self.checker_callback_tag:

735

gobject.source_remove(self.checker_callback_tag)

1179

GLib.source_remove(self.checker_callback_tag)

736

1180

self.checker_callback_tag = None

737

1181

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

738

1182

return

739

1183

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

740

try:

741

self.checker.terminate()

742

#time.sleep(0.5)

743

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

744

# self.checker.kill()

745

except OSError as error:

746

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

747

raise

1184

self.checker.terminate()

748

1185

self.checker = None

749

1186

750

1187

751

def dbus_service_property(dbus_interface, signature="v",

752

access="readwrite", byte_arrays=False):

1188

def dbus_service_property(dbus_interface,

1189

signature="v",

1190

access="readwrite",

1191

byte_arrays=False):

753

1192

"""Decorators for marking methods of a DBusObjectWithProperties to

754

1193

become properties on the D-Bus.

755

1194

756

1195

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

757

1196

and with one argument by "Set".

758

1197

759

1198

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

760

1199

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

761

1200

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

764

1203

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

765

1204

if byte_arrays and signature != "ay":

766

1205

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

767

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

1206

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

1207

768

1208

def decorator(func):

769

1209

func._dbus_is_property = True

770

1210

func._dbus_interface = dbus_interface

773

1213

func._dbus_name = func.__name__

774

1214

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

775

1215

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

776

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1216

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

777

1217

return func

1218

778

1219

return decorator

779

1220

780

1221

781

1222

def dbus_interface_annotations(dbus_interface):

782

1223

"""Decorator for marking functions returning interface annotations

783

1224

784

1225

Usage:

785

1226

786

1227

@dbus_interface_annotations("org.example.Interface")

787

1228

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

788

1229

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

789

1230

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

790

1231

"false"}

791

1232

"""

1233

792

1234

def decorator(func):

793

1235

func._dbus_is_interface = True

794

1236

func._dbus_interface = dbus_interface

795

1237

func._dbus_name = dbus_interface

796

1238

return func

1239

797

1240

return decorator

798

1241

799

1242

800

1243

def dbus_annotations(annotations):

801

1244

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

802

1245

Usage:

803

1246

1247

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

1248

"org.freedesktop.DBus.Property."

1249

"EmitsChangedSignal": "false"})

804

1250

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

805

1251

access="r")

806

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

807

"org.freedesktop.DBus.Property."

808

"EmitsChangedSignal": "false"})

809

1252

def Property_dbus_property(self):

810

1253

return dbus.Boolean(False)

1254

1255

See also the DBusObjectWithAnnotations class.

811

1256

"""

1257

812

1258

def decorator(func):

813

1259

func._dbus_annotations = annotations

814

1260

return func

1261

815

1262

return decorator

816

1263

817

1264

818

1265

class DBusPropertyException(dbus.exceptions.DBusException):

819

1266

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

820

1267

"""

821

def __unicode__(self):

822

return unicode(str(self))

1268

pass

823

1269

824

1270

825

1271

class DBusPropertyAccessException(DBusPropertyException):

834

1280

pass

835

1281

836

1282

837

class DBusObjectWithProperties(dbus.service.Object):

838

"""A D-Bus object with properties.

839

840

Classes inheriting from this can use the dbus_service_property

841

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

842

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

1283

class DBusObjectWithAnnotations(dbus.service.Object):

1284

"""A D-Bus object with annotations.

1285

1286

Classes inheriting from this can use the dbus_annotations

1287

decorator to add annotations to methods or signals.

843

1288

"""

844

1289

845

1290

@staticmethod

846

1291

def _is_dbus_thing(thing):

847

1292

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

848

1293

849

1294

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

850

1295

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

851

1296

"""

852

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

1297

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

853

1298

False)

854

1299

855

1300

def _get_all_dbus_things(self, thing):

856

1301

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

857

1302

"""

858

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

859

name),

1303

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

860

1304

athing.__get__(self))

861

1305

for cls in self.__class__.__mro__

862

1306

for name, athing in

863

inspect.getmembers(cls,

864

self._is_dbus_thing(thing)))

865

1307

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

1308

1309

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1310

out_signature="s",

1311

path_keyword='object_path',

1312

connection_keyword='connection')

1313

def Introspect(self, object_path, connection):

1314

"""Overloading of standard D-Bus method.

1315

1316

Inserts annotation tags on methods and signals.

1317

"""

1318

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

1319

connection)

1320

try:

1321

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

1322

1323

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

1324

# Add annotation tags

1325

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

1326

for tag in if_tag.getElementsByTagName(typ):

1327

annots = dict()

1328

for name, prop in (self.

1329

_get_all_dbus_things(typ)):

1330

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

1331

and prop._dbus_interface

1332

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

1333

annots.update(getattr(

1334

prop, "_dbus_annotations", {}))

1335

for name, value in annots.items():

1336

ann_tag = document.createElement(

1337

"annotation")

1338

ann_tag.setAttribute("name", name)

1339

ann_tag.setAttribute("value", value)

1340

tag.appendChild(ann_tag)

1341

# Add interface annotation tags

1342

for annotation, value in dict(

1343

itertools.chain.from_iterable(

1344

annotations().items()

1345

for name, annotations

1346

in self._get_all_dbus_things("interface")

1347

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

1348

)).items():

1349

ann_tag = document.createElement("annotation")

1350

ann_tag.setAttribute("name", annotation)

1351

ann_tag.setAttribute("value", value)

1352

if_tag.appendChild(ann_tag)

1353

# Fix argument name for the Introspect method itself

1354

if (if_tag.getAttribute("name")

1355

== dbus.INTROSPECTABLE_IFACE):

1356

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

1357

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

1358

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

1359

if (arg.getAttribute("direction")

1360

== "out"):

1361

arg.setAttribute("name",

1362

"xml_data")

1363

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

1364

document.unlink()

1365

except (AttributeError, xml.dom.DOMException,

1366

xml.parsers.expat.ExpatError) as error:

1367

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

1368

exc_info=error)

1369

return xmlstring

1370

1371

1372

class DBusObjectWithProperties(DBusObjectWithAnnotations):

1373

"""A D-Bus object with properties.

1374

1375

Classes inheriting from this can use the dbus_service_property

1376

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

1377

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

1378

"""

1379

866

1380

def _get_dbus_property(self, interface_name, property_name):

867

1381

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

868

1382

property with the specified name and interface.

869

1383

"""

870

for cls in self.__class__.__mro__:

871

for name, value in (inspect.getmembers

872

(cls,

873

self._is_dbus_thing("property"))):

1384

for cls in self.__class__.__mro__:

1385

for name, value in inspect.getmembers(

1386

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

874

1387

if (value._dbus_name == property_name

875

1388

and value._dbus_interface == interface_name):

876

1389

return value.__get__(self)

877

1390

878

1391

# No such property

879

raise DBusPropertyNotFound(self.dbus_object_path + ":"

880

+ interface_name + "."

881

+ property_name)

882

883

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

1392

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

1393

self.dbus_object_path, interface_name, property_name))

1394

1395

@classmethod

1396

def _get_all_interface_names(cls):

1397

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

1398

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

1399

"_dbus_interface", None)

1400

for x in (inspect.getmro(cls))

1401

for attr in dir(x))

1402

if name is not None)

1403

1404

@dbus.service.method(dbus.PROPERTIES_IFACE,

1405

in_signature="ss",

884

1406

out_signature="v")

885

1407

def Get(self, interface_name, property_name):

886

1408

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

892

1414

if not hasattr(value, "variant_level"):

893

1415

return value

894

1416

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

895

1417

896

1418

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

897

1419

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

898

1420

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

904

1426

# The byte_arrays option is not supported yet on

905

1427

# signatures other than "ay".

906

1428

if prop._dbus_signature != "ay":

907

raise ValueError

908

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

909

for byte in value))

1429

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

1430

"'ay' signature {!r}"

1431

.format(prop._dbus_signature))

1432

value = dbus.ByteArray(bytes(value))

910

1433

prop(value)

911

912

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

1434

1435

@dbus.service.method(dbus.PROPERTIES_IFACE,

1436

in_signature="s",

913

1437

out_signature="a{sv}")

914

1438

def GetAll(self, interface_name):

915

1439

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

916

1440

standard.

917

1441

918

1442

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

919

1443

"""

920

1444

properties = {}

930

1454

if not hasattr(value, "variant_level"):

931

1455

properties[name] = value

932

1456

continue

933

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

934

value.variant_level+1)

1457

properties[name] = type(value)(

1458

value, variant_level=value.variant_level + 1)

935

1459

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

936

1460

1461

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

1462

def PropertiesChanged(self, interface_name, changed_properties,

1463

invalidated_properties):

1464

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

1465

standard.

1466

"""

1467

pass

1468

937

1469

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

938

1470

out_signature="s",

939

1471

path_keyword='object_path',

940

1472

connection_keyword='connection')

941

1473

def Introspect(self, object_path, connection):

942

1474

"""Overloading of standard D-Bus method.

943

1475

944

1476

Inserts property tags and interface annotation tags.

945

1477

"""

946

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

947

connection)

1478

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1479

object_path,

1480

connection)

948

1481

try:

949

1482

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

1483

950

1484

def make_tag(document, name, prop):

951

1485

e = document.createElement("property")

952

1486

e.setAttribute("name", name)

953

1487

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

954

1488

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

955

1489

return e

1490

956

1491

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

957

1492

# Add property tags

958

1493

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

961

1496

if prop._dbus_interface

962

1497

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

963

1498

if_tag.appendChild(tag)

964

# Add annotation tags

965

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

966

for tag in if_tag.getElementsByTagName(typ):

967

annots = dict()

968

for name, prop in (self.

969

_get_all_dbus_things(typ)):

970

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

971

and prop._dbus_interface

972

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

973

annots.update(getattr

974

(prop,

975

"_dbus_annotations",

976

{}))

977

for name, value in annots.iteritems():

978

ann_tag = document.createElement(

979

"annotation")

980

ann_tag.setAttribute("name", name)

981

ann_tag.setAttribute("value", value)

982

tag.appendChild(ann_tag)

983

# Add interface annotation tags

984

for annotation, value in dict(

985

itertools.chain.from_iterable(

986

annotations().iteritems()

987

for name, annotations in

988

self._get_all_dbus_things("interface")

989

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

990

)).iteritems():

991

ann_tag = document.createElement("annotation")

992

ann_tag.setAttribute("name", annotation)

993

ann_tag.setAttribute("value", value)

994

if_tag.appendChild(ann_tag)

1499

# Add annotation tags for properties

1500

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

1501

annots = dict()

1502

for name, prop in self._get_all_dbus_things(

1503

"property"):

1504

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

1505

and prop._dbus_interface

1506

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

1507

annots.update(getattr(

1508

prop, "_dbus_annotations", {}))

1509

for name, value in annots.items():

1510

ann_tag = document.createElement(

1511

"annotation")

1512

ann_tag.setAttribute("name", name)

1513

ann_tag.setAttribute("value", value)

1514

tag.appendChild(ann_tag)

995

1515

# Add the names to the return values for the

996

1516

# "org.freedesktop.DBus.Properties" methods

997

1517

if (if_tag.getAttribute("name")

1016

1536

return xmlstring

1017

1537

1018

1538

1539

try:

1540

dbus.OBJECT_MANAGER_IFACE

1541

except AttributeError:

1542

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

1543

1544

1545

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1546

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

1547

1548

Classes inheriting from this exposes the standard

1549

GetManagedObjects call and the InterfacesAdded and

1550

InterfacesRemoved signals on the standard

1551

"org.freedesktop.DBus.ObjectManager" interface.

1552

1553

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

1554

manually.

1555

"""

1556

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1557

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

1558

def GetManagedObjects(self):

1559

"""This function must be overridden"""

1560

raise NotImplementedError()

1561

1562

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1563

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

1564

def InterfacesAdded(self, object_path, interfaces_and_properties):

1565

pass

1566

1567

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

1568

def InterfacesRemoved(self, object_path, interfaces):

1569

pass

1570

1571

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1572

out_signature="s",

1573

path_keyword='object_path',

1574

connection_keyword='connection')

1575

def Introspect(self, object_path, connection):

1576

"""Overloading of standard D-Bus method.

1577

1578

Override return argument name of GetManagedObjects to be

1579

"objpath_interfaces_and_properties"

1580

"""

1581

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1582

object_path,

1583

connection)

1584

try:

1585

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

1586

1587

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

1588

# Fix argument name for the GetManagedObjects method

1589

if (if_tag.getAttribute("name")

1590

== dbus.OBJECT_MANAGER_IFACE):

1591

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

1592

if (cn.getAttribute("name")

1593

== "GetManagedObjects"):

1594

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

1595

if (arg.getAttribute("direction")

1596

== "out"):

1597

arg.setAttribute(

1598

"name",

1599

"objpath_interfaces"

1600

"_and_properties")

1601

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

1602

document.unlink()

1603

except (AttributeError, xml.dom.DOMException,

1604

xml.parsers.expat.ExpatError) as error:

1605

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

1606

exc_info=error)

1607

return xmlstring

1608

1609

1019

1610

def datetime_to_dbus(dt, variant_level=0):

1020

1611

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

1021

1612

if dt is None:

1022

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

1023

return dbus.String(dt.isoformat(),

1024

variant_level=variant_level)

1613

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

1614

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

1025

1615

1026

1616

1027

1617

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1029

1619

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

1030

1620

interface names according to the "alt_interface_names" mapping.

1031

1621

Usage:

1032

1622

1033

1623

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

1034

1624

"net.example.AlternateInterface"})

1035

1625

class SampleDBusObject(dbus.service.Object):

1036

1626

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

1037

1627

def SampleDBusMethod():

1038

1628

pass

1039

1629

1040

1630

The above "SampleDBusMethod" on "SampleDBusObject" will be

1041

1631

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

1042

1632

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

1043

1633

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

1044

1634

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

1045

1635

1046

1636

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

1047

1637

(from DBusObjectWithProperties) and interfaces (from the

1048

1638

dbus_interface_annotations decorator).

1049

1639

"""

1640

1050

1641

def wrapper(cls):

1051

1642

for orig_interface_name, alt_interface_name in (

1052

alt_interface_names.iteritems()):

1643

alt_interface_names.items()):

1053

1644

attr = {}

1054

1645

interface_names = set()

1055

1646

# Go though all attributes of the class

1057

1648

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

1058

1649

# with the wrong interface name

1059

1650

if (not hasattr(attribute, "_dbus_interface")

1060

or not attribute._dbus_interface

1061

.startswith(orig_interface_name)):

1651

or not attribute._dbus_interface.startswith(

1652

orig_interface_name)):

1062

1653

continue

1063

1654

# Create an alternate D-Bus interface name based on

1064

1655

# the current name

1065

alt_interface = (attribute._dbus_interface

1066

.replace(orig_interface_name,

1067

alt_interface_name))

1656

alt_interface = attribute._dbus_interface.replace(

1657

orig_interface_name, alt_interface_name)

1068

1658

interface_names.add(alt_interface)

1069

1659

# Is this a D-Bus signal?

1070

1660

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

1071

# Extract the original non-method function by

1072

# black magic

1073

nonmethod_func = (dict(

1661

# Extract the original non-method undecorated

1662

# function by black magic

1663

if sys.version_info.major == 2:

1664

nonmethod_func = (dict(

1074

1665

zip(attribute.func_code.co_freevars,

1075

attribute.__closure__))["func"]

1076

.cell_contents)

1666

attribute.__closure__))

1667

["func"].cell_contents)

1668

else:

1669

nonmethod_func = (dict(

1670

zip(attribute.__code__.co_freevars,

1671

attribute.__closure__))

1672

["func"].cell_contents)

1077

1673

# Create a new, but exactly alike, function

1078

1674

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

1079

1675

# with the alternate D-Bus interface name

1080

new_function = (dbus.service.signal

1081

(alt_interface,

1082

attribute._dbus_signature)

1083

(types.FunctionType(

1084

nonmethod_func.func_code,

1085

nonmethod_func.func_globals,

1086

nonmethod_func.func_name,

1087

nonmethod_func.func_defaults,

1088

nonmethod_func.func_closure)))

1676

new_function = copy_function(nonmethod_func)

1677

new_function = (dbus.service.signal(

1678

alt_interface,

1679

attribute._dbus_signature)(new_function))

1089

1680

# Copy annotations, if any

1090

1681

try:

1091

new_function._dbus_annotations = (

1092

dict(attribute._dbus_annotations))

1682

new_function._dbus_annotations = dict(

1683

attribute._dbus_annotations)

1093

1684

except AttributeError:

1094

1685

pass

1686

1095

1687

# Define a creator of a function to call both the

1096

1688

# original and alternate functions, so both the

1097

1689

# original and alternate signals gets sent when

1100

1692

"""This function is a scope container to pass

1101

1693

func1 and func2 to the "call_both" function

1102

1694

outside of its arguments"""

1695

1696

@functools.wraps(func2)

1103

1697

def call_both(*args, **kwargs):

1104

1698

"""This function will emit two D-Bus

1105

1699

signals by calling func1 and func2"""

1106

1700

func1(*args, **kwargs)

1107

1701

func2(*args, **kwargs)

1702

# Make wrapper function look like a D-Bus

1703

# signal

1704

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

1705

if name.startswith("_dbus_"):

1706

setattr(call_both, name, attr)

1707

1108

1708

return call_both

1109

1709

# Create the "call_both" function and add it to

1110

1710

# the class

1115

1715

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

1116

1716

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

1117

1717

# to the class.

1118

attr[attrname] = (dbus.service.method

1119

(alt_interface,

1120

attribute._dbus_in_signature,

1121

attribute._dbus_out_signature)

1122

(types.FunctionType

1123

(attribute.func_code,

1124

attribute.func_globals,

1125

attribute.func_name,

1126

attribute.func_defaults,

1127

attribute.func_closure)))

1718

attr[attrname] = (

1719

dbus.service.method(

1720

alt_interface,

1721

attribute._dbus_in_signature,

1722

attribute._dbus_out_signature)

1723

(copy_function(attribute)))

1128

1724

# Copy annotations, if any

1129

1725

try:

1130

attr[attrname]._dbus_annotations = (

1131

dict(attribute._dbus_annotations))

1726

attr[attrname]._dbus_annotations = dict(

1727

attribute._dbus_annotations)

1132

1728

except AttributeError:

1133

1729

pass

1134

1730

# Is this a D-Bus property?

1137

1733

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

1138

1734

# property with the alternate D-Bus interface

1139

1735

# name. Add it to the class.

1140

attr[attrname] = (dbus_service_property

1141

(alt_interface,

1142

attribute._dbus_signature,

1143

attribute._dbus_access,

1144

attribute

1145

._dbus_get_args_options

1146

["byte_arrays"])

1147

(types.FunctionType

1148

(attribute.func_code,

1149

attribute.func_globals,

1150

attribute.func_name,

1151

attribute.func_defaults,

1152

attribute.func_closure)))

1736

attr[attrname] = (dbus_service_property(

1737

alt_interface, attribute._dbus_signature,

1738

attribute._dbus_access,

1739

attribute._dbus_get_args_options

1740

["byte_arrays"])

1741

(copy_function(attribute)))

1153

1742

# Copy annotations, if any

1154

1743

try:

1155

attr[attrname]._dbus_annotations = (

1156

dict(attribute._dbus_annotations))

1744

attr[attrname]._dbus_annotations = dict(

1745

attribute._dbus_annotations)

1157

1746

except AttributeError:

1158

1747

pass

1159

1748

# Is this a D-Bus interface?

1162

1751

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

1163

1752

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

1164

1753

# to the class.

1165

attr[attrname] = (dbus_interface_annotations

1166

(alt_interface)

1167

(types.FunctionType

1168

(attribute.func_code,

1169

attribute.func_globals,

1170

attribute.func_name,

1171

attribute.func_defaults,

1172

attribute.func_closure)))

1754

attr[attrname] = (

1755

dbus_interface_annotations(alt_interface)

1756

(copy_function(attribute)))

1173

1757

if deprecate:

1174

1758

# Deprecate all alternate interfaces

1175

iname="_AlternateDBusNames_interface_annotation{0}"

1759

iname = "_AlternateDBusNames_interface_annotation{}"

1176

1760

for interface_name in interface_names:

1761

1177

1762

@dbus_interface_annotations(interface_name)

1178

1763

def func(self):

1179

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

1180

"true" }

1764

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

1765

"true"}

1181

1766

# Find an unused name

1182

1767

for aname in (iname.format(i)

1183

1768

for i in itertools.count()):

1187

1772

if interface_names:

1188

1773

# Replace the class with a new subclass of it with

1189

1774

# methods, signals, etc. as created above.

1190

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

1191

(cls,), attr)

1775

if sys.version_info.major == 2:

1776

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

1777

(cls, ), attr)

1778

else:

1779

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

1780

(cls, ), attr)

1192

1781

return cls

1782

1193

1783

return wrapper

1194

1784

1195

1785

1196

1786

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

1197

"se.bsnet.fukt.Mandos"})

1787

"se.bsnet.fukt.Mandos"})

1198

1788

class ClientDBus(Client, DBusObjectWithProperties):

1199

1789

"""A Client class using D-Bus

1200

1790

1201

1791

Attributes:

1202

1792

dbus_object_path: dbus.ObjectPath

1203

1793

bus: dbus.SystemBus()

1204

1794

"""

1205

1795

1206

1796

runtime_expansions = (Client.runtime_expansions

1207

+ ("dbus_object_path",))

1208

1797

+ ("dbus_object_path", ))

1798

1799

_interface = "se.recompile.Mandos.Client"

1800

1209

1801

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

1210

1211

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

1802

1803

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

1212

1804

self.bus = bus

1213

1805

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

1214

1806

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

1215

1807

# the D-Bus

1216

client_object_name = unicode(self.name).translate(

1808

client_object_name = str(self.name).translate(

1217

1809

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

1218

1810

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

1219

self.dbus_object_path = (dbus.ObjectPath

1220

("/clients/" + client_object_name))

1811

self.dbus_object_path = dbus.ObjectPath(

1812

"/clients/" + client_object_name)

1221

1813

DBusObjectWithProperties.__init__(self, self.bus,

1222

1814

self.dbus_object_path)

1223

1224

def notifychangeproperty(transform_func,

1225

dbus_name, type_func=lambda x: x,

1226

variant_level=1):

1815

1816

def notifychangeproperty(transform_func, dbus_name,

1817

type_func=lambda x: x,

1818

variant_level=1,

1819

invalidate_only=False,

1820

_interface=_interface):

1227

1821

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

1228

1822

its changes to DBus.

1229

1823

1230

1824

transform_fun: Function that takes a value and a variant_level

1231

1825

and transforms it to a D-Bus type.

1232

1826

dbus_name: D-Bus name of the variable

1234

1828

to the D-Bus. Default: no transform

1235

1829

variant_level: D-Bus variant level. Default: 1

1236

1830

"""

1237

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

1831

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

1832

1238

1833

def setter(self, value):

1239

1834

if hasattr(self, "dbus_object_path"):

1240

1835

if (not hasattr(self, attrname) or

1241

1836

type_func(getattr(self, attrname, None))

1242

1837

!= type_func(value)):

1243

dbus_value = transform_func(type_func(value),

1244

variant_level

1245

=variant_level)

1246

self.PropertyChanged(dbus.String(dbus_name),

1247

dbus_value)

1838

if invalidate_only:

1839

self.PropertiesChanged(

1840

_interface, dbus.Dictionary(),

1841

dbus.Array((dbus_name, )))

1842

else:

1843

dbus_value = transform_func(

1844

type_func(value),

1845

variant_level=variant_level)

1846

self.PropertyChanged(dbus.String(dbus_name),

1847

dbus_value)

1848

self.PropertiesChanged(

1849

_interface,

1850

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

1851

dbus_value}),

1852

dbus.Array())

1248

1853

setattr(self, attrname, value)

1249

1854

1250

1855

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

1251

1856

1252

1857

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1253

1858

approvals_pending = notifychangeproperty(dbus.Boolean,

1254

1859

"ApprovalPending",

1255

type_func = bool)

1860

type_func=bool)

1256

1861

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

1257

1862

last_enabled = notifychangeproperty(datetime_to_dbus,

1258

1863

"LastEnabled")

1259

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

1260

type_func = lambda checker:

1261

checker is not None)

1864

checker = notifychangeproperty(

1865

dbus.Boolean, "CheckerRunning",

1866

type_func=lambda checker: checker is not None)

1262

1867

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1263

1868

"LastCheckedOK")

1264

1869

last_checker_status = notifychangeproperty(dbus.Int16,

1267

1872

datetime_to_dbus, "LastApprovalRequest")

1268

1873

approved_by_default = notifychangeproperty(dbus.Boolean,

1269

1874

"ApprovedByDefault")

1270

approval_delay = notifychangeproperty(dbus.UInt64,

1271

"ApprovalDelay",

1272

type_func =

1273

timedelta_to_milliseconds)

1875

approval_delay = notifychangeproperty(

1876

dbus.UInt64, "ApprovalDelay",

1877

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

1274

1878

approval_duration = notifychangeproperty(

1275

1879

dbus.UInt64, "ApprovalDuration",

1276

type_func = timedelta_to_milliseconds)

1880

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

1277

1881

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

1278

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

1279

type_func =

1280

timedelta_to_milliseconds)

1882

timeout = notifychangeproperty(

1883

dbus.UInt64, "Timeout",

1884

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

1281

1885

extended_timeout = notifychangeproperty(

1282

1886

dbus.UInt64, "ExtendedTimeout",

1283

type_func = timedelta_to_milliseconds)

1284

interval = notifychangeproperty(dbus.UInt64,

1285

"Interval",

1286

type_func =

1287

timedelta_to_milliseconds)

1887

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

1888

interval = notifychangeproperty(

1889

dbus.UInt64, "Interval",

1890

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

1288

1891

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

1289

1892

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

1893

invalidate_only=True)

1894

1290

1895

del notifychangeproperty

1291

1896

1292

1897

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

1293

1898

try:

1294

1899

self.remove_from_connection()

1297

1902

if hasattr(DBusObjectWithProperties, "__del__"):

1298

1903

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

1299

1904

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

1300

1301

def checker_callback(self, pid, condition, command,

1302

*args, **kwargs):

1303

self.checker_callback_tag = None

1304

self.checker = None

1305

if os.WIFEXITED(condition):

1306

exitstatus = os.WEXITSTATUS(condition)

1905

1906

def checker_callback(self, source, condition,

1907

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

1908

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

1909

connection, command, *args,

1910

**kwargs)

1911

exitstatus = self.last_checker_status

1912

if exitstatus >= 0:

1307

1913

# Emit D-Bus signal

1308

1914

self.CheckerCompleted(dbus.Int16(exitstatus),

1309

dbus.Int64(condition),

1915

# This is specific to GNU libC

1916

dbus.Int64(exitstatus << 8),

1310

1917

dbus.String(command))

1311

1918

else:

1312

1919

# Emit D-Bus signal

1313

1920

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

1314

dbus.Int64(condition),

1921

dbus.Int64(

1922

# This is specific to GNU libC

1923

(exitstatus << 8)

1924

| self.last_checker_signal),

1315

1925

dbus.String(command))

1316

1317

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

1318

*args, **kwargs)

1319

1926

return ret

1927

1320

1928

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

1321

old_checker = self.checker

1322

if self.checker is not None:

1323

old_checker_pid = self.checker.pid

1324

else:

1325

old_checker_pid = None

1929

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

1326

1930

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

1327

1931

# Only if new checker process was started

1328

1932

if (self.checker is not None

1330

1934

# Emit D-Bus signal

1331

1935

self.CheckerStarted(self.current_checker_command)

1332

1936

return r

1333

1937

1334

1938

def _reset_approved(self):

1335

1939

self.approved = None

1336

1940

return False

1337

1941

1338

1942

def approve(self, value=True):

1339

1943

self.approved = value

1340

gobject.timeout_add(timedelta_to_milliseconds

1341

(self.approval_duration),

1342

self._reset_approved)

1944

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

1945

* 1000), self._reset_approved)

1343

1946

self.send_changedstate()

1344

1345

## D-Bus methods, signals & properties

1346

_interface = "se.recompile.Mandos.Client"

1347

1348

## Interfaces

1349

1350

@dbus_interface_annotations(_interface)

1351

def _foo(self):

1352

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

1353

"false"}

1354

1355

## Signals

1356

1947

1948

# D-Bus methods, signals & properties

1949

1950

# Interfaces

1951

1952

# Signals

1953

1357

1954

# CheckerCompleted - signal

1358

1955

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

1359

1956

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

1360

1957

"D-Bus signal"

1361

1958

pass

1362

1959

1363

1960

# CheckerStarted - signal

1364

1961

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

1365

1962

def CheckerStarted(self, command):

1366

1963

"D-Bus signal"

1367

1964

pass

1368

1965

1369

1966

# PropertyChanged - signal

1967

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

1370

1968

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

1371

1969

def PropertyChanged(self, property, value):

1372

1970

"D-Bus signal"

1373

1971

pass

1374

1972

1375

1973

# GotSecret - signal

1376

1974

@dbus.service.signal(_interface)

1377

1975

def GotSecret(self):

1380

1978

server to mandos-client

1381

1979

"""

1382

1980

pass

1383

1981

1384

1982

# Rejected - signal

1385

1983

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

1386

1984

def Rejected(self, reason):

1387

1985

"D-Bus signal"

1388

1986

pass

1389

1987

1390

1988

# NeedApproval - signal

1391

1989

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

1392

1990

def NeedApproval(self, timeout, default):

1393

1991

"D-Bus signal"

1394

1992

return self.need_approval()

1395

1396

## Methods

1397

1993

1994

# Methods

1995

1398

1996

# Approve - method

1399

1997

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

1400

1998

def Approve(self, value):

1401

1999

self.approve(value)

1402

2000

1403

2001

# CheckedOK - method

1404

2002

@dbus.service.method(_interface)

1405

2003

def CheckedOK(self):

1406

2004

self.checked_ok()

1407

2005

1408

2006

# Enable - method

2007

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

1409

2008

@dbus.service.method(_interface)

1410

2009

def Enable(self):

1411

2010

"D-Bus method"

1412

2011

self.enable()

1413

2012

1414

2013

# StartChecker - method

2014

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

1415

2015

@dbus.service.method(_interface)

1416

2016

def StartChecker(self):

1417

2017

"D-Bus method"

1418

2018

self.start_checker()

1419

2019

1420

2020

# Disable - method

2021

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

1421

2022

@dbus.service.method(_interface)

1422

2023

def Disable(self):

1423

2024

"D-Bus method"

1424

2025

self.disable()

1425

2026

1426

2027

# StopChecker - method

2028

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

1427

2029

@dbus.service.method(_interface)

1428

2030

def StopChecker(self):

1429

2031

self.stop_checker()

1430

1431

## Properties

1432

2032

2033

# Properties

2034

1433

2035

# ApprovalPending - property

1434

2036

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

1435

2037

def ApprovalPending_dbus_property(self):

1436

2038

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

1437

2039

1438

2040

# ApprovedByDefault - property

1439

@dbus_service_property(_interface, signature="b",

2041

@dbus_service_property(_interface,

2042

signature="b",

1440

2043

access="readwrite")

1441

2044

def ApprovedByDefault_dbus_property(self, value=None):

1442

2045

if value is None: # get

1443

2046

return dbus.Boolean(self.approved_by_default)

1444

2047

self.approved_by_default = bool(value)

1445

2048

1446

2049

# ApprovalDelay - property

1447

@dbus_service_property(_interface, signature="t",

2050

@dbus_service_property(_interface,

2051

signature="t",

1448

2052

access="readwrite")

1449

2053

def ApprovalDelay_dbus_property(self, value=None):

1450

2054

if value is None: # get

1451

return dbus.UInt64(self.approval_delay_milliseconds())

2055

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

2056

* 1000)

1452

2057

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

1453

2058

1454

2059

# ApprovalDuration - property

1455

@dbus_service_property(_interface, signature="t",

2060

@dbus_service_property(_interface,

2061

signature="t",

1456

2062

access="readwrite")

1457

2063

def ApprovalDuration_dbus_property(self, value=None):

1458

2064

if value is None: # get

1459

return dbus.UInt64(timedelta_to_milliseconds(

1460

self.approval_duration))

2065

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

2066

* 1000)

1461

2067

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

1462

2068

1463

2069

# Name - property

2070

@dbus_annotations(

2071

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

1464

2072

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

1465

2073

def Name_dbus_property(self):

1466

2074

return dbus.String(self.name)

1467

2075

2076

# KeyID - property

2077

@dbus_annotations(

2078

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

2079

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

2080

def KeyID_dbus_property(self):

2081

return dbus.String(self.key_id)

2082

1468

2083

# Fingerprint - property

2084

@dbus_annotations(

2085

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

1469

2086

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

1470

2087

def Fingerprint_dbus_property(self):

1471

2088

return dbus.String(self.fingerprint)

1472

2089

1473

2090

# Host - property

1474

@dbus_service_property(_interface, signature="s",

2091

@dbus_service_property(_interface,

2092

signature="s",

1475

2093

access="readwrite")

1476

2094

def Host_dbus_property(self, value=None):

1477

2095

if value is None: # get

1478

2096

return dbus.String(self.host)

1479

self.host = unicode(value)

1480

2097

self.host = str(value)

2098

1481

2099

# Created - property

2100

@dbus_annotations(

2101

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

1482

2102

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

1483

2103

def Created_dbus_property(self):

1484

2104

return datetime_to_dbus(self.created)

1485

2105

1486

2106

# LastEnabled - property

1487

2107

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

1488

2108

def LastEnabled_dbus_property(self):

1489

2109

return datetime_to_dbus(self.last_enabled)

1490

2110

1491

2111

# Enabled - property

1492

@dbus_service_property(_interface, signature="b",

2112

@dbus_service_property(_interface,

2113

signature="b",

1493

2114

access="readwrite")

1494

2115

def Enabled_dbus_property(self, value=None):

1495

2116

if value is None: # get

1498

2119

self.enable()

1499

2120

else:

1500

2121

self.disable()

1501

2122

1502

2123

# LastCheckedOK - property

1503

@dbus_service_property(_interface, signature="s",

2124

@dbus_service_property(_interface,

2125

signature="s",

1504

2126

access="readwrite")

1505

2127

def LastCheckedOK_dbus_property(self, value=None):

1506

2128

if value is not None:

1507

2129

self.checked_ok()

1508

2130

return

1509

2131

return datetime_to_dbus(self.last_checked_ok)

1510

2132

1511

2133

# LastCheckerStatus - property

1512

@dbus_service_property(_interface, signature="n",

1513

access="read")

2134

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

1514

2135

def LastCheckerStatus_dbus_property(self):

1515

2136

return dbus.Int16(self.last_checker_status)

1516

2137

1517

2138

# Expires - property

1518

2139

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

1519

2140

def Expires_dbus_property(self):

1520

2141

return datetime_to_dbus(self.expires)

1521

2142

1522

2143

# LastApprovalRequest - property

1523

2144

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

1524

2145

def LastApprovalRequest_dbus_property(self):

1525

2146

return datetime_to_dbus(self.last_approval_request)

1526

2147

1527

2148

# Timeout - property

1528

@dbus_service_property(_interface, signature="t",

2149

@dbus_service_property(_interface,

2150

signature="t",

1529

2151

access="readwrite")

1530

2152

def Timeout_dbus_property(self, value=None):

1531

2153

if value is None: # get

1532

return dbus.UInt64(self.timeout_milliseconds())

2154

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

1533

2155

old_timeout = self.timeout

1534

2156

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

1535

2157

# Reschedule disabling

1543

2165

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

1544

2166

is None):

1545

2167

return

1546

gobject.source_remove(self.disable_initiator_tag)

1547

self.disable_initiator_tag = (

1548

gobject.timeout_add(

1549

timedelta_to_milliseconds(self.expires - now),

1550

self.disable))

1551

2168

GLib.source_remove(self.disable_initiator_tag)

2169

self.disable_initiator_tag = GLib.timeout_add(

2170

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

2171

self.disable)

2172

1552

2173

# ExtendedTimeout - property

1553

@dbus_service_property(_interface, signature="t",

2174

@dbus_service_property(_interface,

2175

signature="t",

1554

2176

access="readwrite")

1555

2177

def ExtendedTimeout_dbus_property(self, value=None):

1556

2178

if value is None: # get

1557

return dbus.UInt64(self.extended_timeout_milliseconds())

2179

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

2180

* 1000)

1558

2181

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

1559

2182

1560

2183

# Interval - property

1561

@dbus_service_property(_interface, signature="t",

2184

@dbus_service_property(_interface,

2185

signature="t",

1562

2186

access="readwrite")

1563

2187

def Interval_dbus_property(self, value=None):

1564

2188

if value is None: # get

1565

return dbus.UInt64(self.interval_milliseconds())

2189

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

1566

2190

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

1567

2191

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

1568

2192

return

1569

2193

if self.enabled:

1570

2194

# Reschedule checker run

1571

gobject.source_remove(self.checker_initiator_tag)

1572

self.checker_initiator_tag = (gobject.timeout_add

1573

(value, self.start_checker))

1574

self.start_checker() # Start one now, too

1575

2195

GLib.source_remove(self.checker_initiator_tag)

2196

self.checker_initiator_tag = GLib.timeout_add(

2197

value, self.start_checker)

2198

self.start_checker() # Start one now, too

2199

1576

2200

# Checker - property

1577

@dbus_service_property(_interface, signature="s",

2201

@dbus_service_property(_interface,

2202

signature="s",

1578

2203

access="readwrite")

1579

2204

def Checker_dbus_property(self, value=None):

1580

2205

if value is None: # get

1581

2206

return dbus.String(self.checker_command)

1582

self.checker_command = unicode(value)

1583

2207

self.checker_command = str(value)

2208

1584

2209

# CheckerRunning - property

1585

@dbus_service_property(_interface, signature="b",

2210

@dbus_service_property(_interface,

2211

signature="b",

1586

2212

access="readwrite")

1587

2213

def CheckerRunning_dbus_property(self, value=None):

1588

2214

if value is None: # get

1591

2217

self.start_checker()

1592

2218

else:

1593

2219

self.stop_checker()

1594

2220

1595

2221

# ObjectPath - property

2222

@dbus_annotations(

2223

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

2224

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

1596

2225

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

1597

2226

def ObjectPath_dbus_property(self):

1598

return self.dbus_object_path # is already a dbus.ObjectPath

1599

2227

return self.dbus_object_path # is already a dbus.ObjectPath

2228

1600

2229

# Secret = property

1601

@dbus_service_property(_interface, signature="ay",

1602

access="write", byte_arrays=True)

2230

@dbus_annotations(

2231

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

2232

"invalidates"})

2233

@dbus_service_property(_interface,

2234

signature="ay",

2235

access="write",

2236

byte_arrays=True)

1603

2237

def Secret_dbus_property(self, value):

1604

self.secret = str(value)

1605

2238

self.secret = bytes(value)

2239

1606

2240

del _interface

1607

2241

1608

2242

1609

class ProxyClient(object):

1610

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

2243

class ProxyClient:

2244

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

1611

2245

self._pipe = child_pipe

1612

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

2246

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

1613

2247

if not self._pipe.recv():

1614

raise KeyError()

1615

2248

raise KeyError(key_id or fpr)

2249

1616

2250

def __getattribute__(self, name):

1617

2251

if name == '_pipe':

1618

2252

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

1621

2255

if data[0] == 'data':

1622

2256

return data[1]

1623

2257

if data[0] == 'function':

2258

1624

2259

def func(*args, **kwargs):

1625

2260

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

1626

2261

return self._pipe.recv()[1]

2262

1627

2263

return func

1628

2264

1629

2265

def __setattr__(self, name, value):

1630

2266

if name == '_pipe':

1631

2267

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

1634

2270

1635

2271

class ClientHandler(socketserver.BaseRequestHandler, object):

1636

2272

"""A class to handle client connections.

1637

2273

1638

2274

Instantiated once for each connection to handle it.

1639

2275

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

1640

2276

1641

2277

def handle(self):

1642

2278

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

1643

2279

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

1644

unicode(self.client_address))

2280

str(self.client_address))

1645

2281

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

1646

2282

self.server.child_pipe.fileno())

1647

1648

session = (gnutls.connection

1649

.ClientSession(self.request,

1650

gnutls.connection

1651

.X509Credentials()))

1652

1653

# Note: gnutls.connection.X509Credentials is really a

1654

# generic GnuTLS certificate credentials object so long as

1655

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

1656

# here despite using OpenPGP certificates.

1657

1658

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

1659

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

1660

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

1661

# "+DHE-DSS"))

2283

2284

session = gnutls.ClientSession(self.request)

2285

2286

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

2287

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

2288

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

2289

# "+DHE-DSS"))

1662

2290

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

1663

2291

priority = self.server.gnutls_priority

1664

2292

if priority is None:

1665

2293

priority = "NORMAL"

1666

(gnutls.library.functions

1667

.gnutls_priority_set_direct(session._c_object,

1668

priority, None))

1669

2294

gnutls.priority_set_direct(session._c_object,

2295

priority.encode("utf-8"),

2296

None)

2297

1670

2298

# Start communication using the Mandos protocol

1671

2299

# Get protocol number

1672

2300

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

1673

2301

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

1674

2302

try:

1675

2303

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

1676

raise RuntimeError

2304

raise RuntimeError(line)

1677

2305

except (ValueError, IndexError, RuntimeError) as error:

1678

2306

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

1679

2307

return

1680

2308

1681

2309

# Start GnuTLS connection

1682

2310

try:

1683

2311

session.handshake()

1684

except gnutls.errors.GNUTLSError as error:

2312

except gnutls.Error as error:

1685

2313

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

1686

2314

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

1687

2315

# established. Just abandon the request.

1688

2316

return

1689

2317

logger.debug("Handshake succeeded")

1690

2318

1691

2319

approval_required = False

1692

2320

try:

1693

try:

1694

fpr = self.fingerprint(self.peer_certificate

1695

(session))

1696

except (TypeError,

1697

gnutls.errors.GNUTLSError) as error:

1698

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

1699

return

1700

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

1701

1702

try:

1703

client = ProxyClient(child_pipe, fpr,

2321

if gnutls.has_rawpk:

2322

fpr = b""

2323

try:

2324

key_id = self.key_id(

2325

self.peer_certificate(session))

2326

except (TypeError, gnutls.Error) as error:

2327

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

2328

return

2329

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

2330

2331

else:

2332

key_id = b""

2333

try:

2334

fpr = self.fingerprint(

2335

self.peer_certificate(session))

2336

except (TypeError, gnutls.Error) as error:

2337

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

2338

return

2339

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

2340

2341

try:

2342

client = ProxyClient(child_pipe, key_id, fpr,

1704

2343

self.client_address)

1705

2344

except KeyError:

1706

2345

return

1707

2346

1708

2347

if client.approval_delay:

1709

2348

delay = client.approval_delay

1710

2349

client.approvals_pending += 1

1711

2350

approval_required = True

1712

2351

1713

2352

while True:

1714

2353

if not client.enabled:

1715

2354

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

1716

client.name)

2355

client.name)

1717

2356

if self.server.use_dbus:

1718

2357

# Emit D-Bus signal

1719

2358

client.Rejected("Disabled")

1720

2359

return

1721

2360

1722

2361

if client.approved or not client.approval_delay:

1723

#We are approved or approval is disabled

2362

# We are approved or approval is disabled

1724

2363

break

1725

2364

elif client.approved is None:

1726

2365

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

1728

2367

if self.server.use_dbus:

1729

2368

# Emit D-Bus signal

1730

2369

client.NeedApproval(

1731

client.approval_delay_milliseconds(),

1732

client.approved_by_default)

2370

client.approval_delay.total_seconds()

2371

* 1000, client.approved_by_default)

1733

2372

else:

1734

2373

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

1735

2374

client.name)

1737

2376

# Emit D-Bus signal

1738

2377

client.Rejected("Denied")

1739

2378

return

1740

1741

#wait until timeout or approved

2379

2380

# wait until timeout or approved

1742

2381

time = datetime.datetime.now()

1743

2382

client.changedstate.acquire()

1744

client.changedstate.wait(

1745

float(timedelta_to_milliseconds(delay)

1746

/ 1000))

2383

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

1747

2384

client.changedstate.release()

1748

2385

time2 = datetime.datetime.now()

1749

2386

if (time2 - time) >= delay:

1759

2396

break

1760

2397

else:

1761

2398

delay -= time2 - time

1762

1763

sent_size = 0

1764

while sent_size < len(client.secret):

1765

try:

1766

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

1767

except gnutls.errors.GNUTLSError as error:

1768

logger.warning("gnutls send failed",

1769

exc_info=error)

1770

return

1771

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

1772

sent, len(client.secret)

1773

- (sent_size + sent))

1774

sent_size += sent

1775

2399

2400

try:

2401

session.send(client.secret)

2402

except gnutls.Error as error:

2403

logger.warning("gnutls send failed",

2404

exc_info=error)

2405

return

2406

1776

2407

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

1777

2408

# bump the timeout using extended_timeout

1778

2409

client.bump_timeout(client.extended_timeout)

1779

2410

if self.server.use_dbus:

1780

2411

# Emit D-Bus signal

1781

2412

client.GotSecret()

1782

2413

1783

2414

finally:

1784

2415

if approval_required:

1785

2416

client.approvals_pending -= 1

1786

2417

try:

1787

2418

session.bye()

1788

except gnutls.errors.GNUTLSError as error:

2419

except gnutls.Error as error:

1789

2420

logger.warning("GnuTLS bye failed",

1790

2421

exc_info=error)

1791

2422

1792

2423

@staticmethod

1793

2424

def peer_certificate(session):

1794

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

1795

# If not an OpenPGP certificate...

1796

if (gnutls.library.functions

1797

.gnutls_certificate_type_get(session._c_object)

1798

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1799

# ...do the normal thing

1800

return session.peer_certificate

2425

"Return the peer's certificate as a bytestring"

2426

try:

2427

cert_type = gnutls.certificate_type_get2(session._c_object,

2428

gnutls.CTYPE_PEERS)

2429

except AttributeError:

2430

cert_type = gnutls.certificate_type_get(session._c_object)

2431

if gnutls.has_rawpk:

2432

valid_cert_types = frozenset((gnutls.CRT_RAWPK,))

2433

else:

2434

valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))

2435

# If not a valid certificate type...

2436

if cert_type not in valid_cert_types:

2437

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

2438

valid_cert_types)

2439

# ...return invalid data

2440

return b""

1801

2441

list_size = ctypes.c_uint(1)

1802

cert_list = (gnutls.library.functions

1803

.gnutls_certificate_get_peers

2442

cert_list = (gnutls.certificate_get_peers

1804

2443

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

1805

2444

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

1806

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

1807

" certificate")

2445

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

1808

2446

if list_size.value == 0:

1809

2447

return None

1810

2448

cert = cert_list[0]

1811

2449

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

1812

2450

2451

@staticmethod

2452

def key_id(certificate):

2453

"Convert a certificate bytestring to a hexdigit key ID"

2454

# New GnuTLS "datum" with the public key

2455

datum = gnutls.datum_t(

2456

ctypes.cast(ctypes.c_char_p(certificate),

2457

ctypes.POINTER(ctypes.c_ubyte)),

2458

ctypes.c_uint(len(certificate)))

2459

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

2460

# New empty GnuTLS certificate

2461

pubkey = gnutls.pubkey_t()

2462

gnutls.pubkey_init(ctypes.byref(pubkey))

2463

# Import the raw public key into the certificate

2464

gnutls.pubkey_import(pubkey,

2465

ctypes.byref(datum),

2466

gnutls.X509_FMT_DER)

2467

# New buffer for the key ID

2468

buf = ctypes.create_string_buffer(32)

2469

buf_len = ctypes.c_size_t(len(buf))

2470

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

2471

gnutls.pubkey_get_key_id(pubkey,

2472

gnutls.KEYID_USE_SHA256,

2473

ctypes.cast(ctypes.byref(buf),

2474

ctypes.POINTER(ctypes.c_ubyte)),

2475

ctypes.byref(buf_len))

2476

# Deinit the certificate

2477

gnutls.pubkey_deinit(pubkey)

2478

2479

# Convert the buffer to a Python bytestring

2480

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

2481

# Convert the bytestring to hexadecimal notation

2482

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

2483

return hex_key_id

2484

1813

2485

@staticmethod

1814

2486

def fingerprint(openpgp):

1815

2487

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1816

2488

# New GnuTLS "datum" with the OpenPGP public key

1817

datum = (gnutls.library.types

1818

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

1819

ctypes.POINTER

1820

(ctypes.c_ubyte)),

1821

ctypes.c_uint(len(openpgp))))

2489

datum = gnutls.datum_t(

2490

ctypes.cast(ctypes.c_char_p(openpgp),

2491

ctypes.POINTER(ctypes.c_ubyte)),

2492

ctypes.c_uint(len(openpgp)))

1822

2493

# New empty GnuTLS certificate

1823

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1824

(gnutls.library.functions

1825

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2494

crt = gnutls.openpgp_crt_t()

2495

gnutls.openpgp_crt_init(ctypes.byref(crt))

1826

2496

# Import the OpenPGP public key into the certificate

1827

(gnutls.library.functions

1828

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

1829

gnutls.library.constants

1830

.GNUTLS_OPENPGP_FMT_RAW))

2497

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

2498

gnutls.OPENPGP_FMT_RAW)

1831

2499

# Verify the self signature in the key

1832

2500

crtverify = ctypes.c_uint()

1833

(gnutls.library.functions

1834

.gnutls_openpgp_crt_verify_self(crt, 0,

1835

ctypes.byref(crtverify)))

2501

gnutls.openpgp_crt_verify_self(crt, 0,

2502

ctypes.byref(crtverify))

1836

2503

if crtverify.value != 0:

1837

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1838

raise (gnutls.errors.CertificateSecurityError

1839

("Verify failed"))

2504

gnutls.openpgp_crt_deinit(crt)

2505

raise gnutls.CertificateSecurityError(code

2506

=crtverify.value)

1840

2507

# New buffer for the fingerprint

1841

2508

buf = ctypes.create_string_buffer(20)

1842

2509

buf_len = ctypes.c_size_t()

1843

2510

# Get the fingerprint from the certificate into the buffer

1844

(gnutls.library.functions

1845

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

1846

ctypes.byref(buf_len)))

2511

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

2512

ctypes.byref(buf_len))

1847

2513

# Deinit the certificate

1848

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2514

gnutls.openpgp_crt_deinit(crt)

1849

2515

# Convert the buffer to a Python bytestring

1850

2516

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

1851

2517

# Convert the bytestring to hexadecimal notation

1853

2519

return hex_fpr

1854

2520

1855

2521

1856

class MultiprocessingMixIn(object):

2522

class MultiprocessingMixIn:

1857

2523

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

2524

1858

2525

def sub_process_main(self, request, address):

1859

2526

try:

1860

2527

self.finish_request(request, address)

1861

2528

except Exception:

1862

2529

self.handle_error(request, address)

1863

2530

self.close_request(request)

1864

2531

1865

2532

def process_request(self, request, address):

1866

2533

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

1867

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

1868

args = (request, address))

2534

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

2535

args=(request, address))

1869

2536

proc.start()

1870

2537

return proc

1871

2538

1872

2539

1873

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2540

class MultiprocessingMixInWithPipe(MultiprocessingMixIn):

1874

2541

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

2542

1875

2543

def process_request(self, request, client_address):

1876

2544

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

1877

2545

1878

2546

This function creates a new pipe in self.pipe

1879

2547

"""

1880

2548

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1881

2549

1882

2550

proc = MultiprocessingMixIn.process_request(self, request,

1883

2551

client_address)

1884

2552

self.child_pipe.close()

1885

2553

self.add_pipe(parent_pipe, proc)

1886

2554

1887

2555

def add_pipe(self, parent_pipe, proc):

1888

2556

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

1889

raise NotImplementedError

2557

raise NotImplementedError()

1890

2558

1891

2559

1892

2560

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1893

socketserver.TCPServer, object):

2561

socketserver.TCPServer):

1894

2562

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

1895

2563

1896

2564

Attributes:

1897

2565

enabled: Boolean; whether this server is activated yet

1898

2566

interface: None or a network interface name (string)

1899

2567

use_ipv6: Boolean; to use IPv6 or not

1900

2568

"""

2569

1901

2570

def __init__(self, server_address, RequestHandlerClass,

1902

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

2571

interface=None,

2572

use_ipv6=True,

2573

socketfd=None):

1903

2574

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

1904

2575

creating a new one with socket.socket().

1905

2576

"""

1911

2582

self.socketfd = socketfd

1912

2583

# Save the original socket.socket() function

1913

2584

self.socket_socket = socket.socket

2585

1914

2586

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

1915

#

2587

#

1916

2588

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

1917

2589

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

1918

2590

# patching socket.socket.)

1919

#

2591

#

1920

2592

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

1921

2593

@functools.wraps(socket.socket)

1922

2594

def socket_wrapper(*args, **kwargs):

1934

2606

# socket_wrapper(), if socketfd was set.

1935

2607

socketserver.TCPServer.__init__(self, server_address,

1936

2608

RequestHandlerClass)

1937

2609

1938

2610

def server_bind(self):

1939

2611

"""This overrides the normal server_bind() function

1940

2612

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

1941

2613

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

2614

global SO_BINDTODEVICE

1942

2615

if self.interface is not None:

1943

2616

if SO_BINDTODEVICE is None:

1944

logger.error("SO_BINDTODEVICE does not exist;"

1945

" cannot bind to interface %s",

1946

self.interface)

1947

else:

1948

try:

1949

self.socket.setsockopt(socket.SOL_SOCKET,

1950

SO_BINDTODEVICE,

1951

str(self.interface

1952

+ '\0'))

1953

except socket.error as error:

1954

if error.errno == errno.EPERM:

1955

logger.error("No permission to"

1956

" bind to interface %s",

1957

self.interface)

1958

elif error.errno == errno.ENOPROTOOPT:

1959

logger.error("SO_BINDTODEVICE not available;"

1960

" cannot bind to interface %s",

1961

self.interface)

1962

elif error.errno == errno.ENODEV:

1963

logger.error("Interface %s does not"

1964

" exist, cannot bind",

1965

self.interface)

1966

else:

1967

raise

2617

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

2618

# common enough.

2619

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

2620

SO_BINDTODEVICE = 25

2621

try:

2622

self.socket.setsockopt(

2623

socket.SOL_SOCKET, SO_BINDTODEVICE,

2624

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

2625

except socket.error as error:

2626

if error.errno == errno.EPERM:

2627

logger.error("No permission to bind to"

2628

" interface %s", self.interface)

2629

elif error.errno == errno.ENOPROTOOPT:

2630

logger.error("SO_BINDTODEVICE not available;"

2631

" cannot bind to interface %s",

2632

self.interface)

2633

elif error.errno == errno.ENODEV:

2634

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

2635

" cannot bind", self.interface)

2636

else:

2637

raise

1968

2638

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

1969

2639

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

2640

if self.server_address[1]:

2641

self.allow_reuse_address = True

1970

2642

if not self.server_address[0]:

1971

2643

if self.address_family == socket.AF_INET6:

1972

any_address = "::" # in6addr_any

2644

any_address = "::" # in6addr_any

1973

2645

else:

1974

any_address = socket.INADDR_ANY

2646

any_address = "0.0.0.0" # INADDR_ANY

1975

2647

self.server_address = (any_address,

1976

2648

self.server_address[1])

1977

2649

elif not self.server_address[1]:

1978

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

1979

0)

2650

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

1980

2651

# if self.interface:

1981

2652

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

1982

2653

# 0, # port

1988

2659

1989

2660

class MandosServer(IPv6_TCPServer):

1990

2661

"""Mandos server.

1991

2662

1992

2663

Attributes:

1993

2664

clients: set of Client objects

1994

2665

gnutls_priority GnuTLS priority string

1995

2666

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

1996

1997

Assumes a gobject.MainLoop event loop.

2667

2668

Assumes a GLib.MainLoop event loop.

1998

2669

"""

2670

1999

2671

def __init__(self, server_address, RequestHandlerClass,

2000

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

2001

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

2672

interface=None,

2673

use_ipv6=True,

2674

clients=None,

2675

gnutls_priority=None,

2676

use_dbus=True,

2677

socketfd=None):

2002

2678

self.enabled = False

2003

2679

self.clients = clients

2004

2680

if self.clients is None:

2007

2683

self.gnutls_priority = gnutls_priority

2008

2684

IPv6_TCPServer.__init__(self, server_address,

2009

2685

RequestHandlerClass,

2010

interface = interface,

2011

use_ipv6 = use_ipv6,

2012

socketfd = socketfd)

2686

interface=interface,

2687

use_ipv6=use_ipv6,

2688

socketfd=socketfd)

2689

2013

2690

def server_activate(self):

2014

2691

if self.enabled:

2015

2692

return socketserver.TCPServer.server_activate(self)

2016

2693

2017

2694

def enable(self):

2018

2695

self.enabled = True

2019

2696

2020

2697

def add_pipe(self, parent_pipe, proc):

2021

2698

# Call "handle_ipc" for both data and EOF events

2022

gobject.io_add_watch(parent_pipe.fileno(),

2023

gobject.IO_IN | gobject.IO_HUP,

2024

functools.partial(self.handle_ipc,

2025

parent_pipe =

2026

parent_pipe,

2027

proc = proc))

2028

2029

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

2030

proc = None, client_object=None):

2699

GLib.io_add_watch(

2700

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

2701

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

2702

functools.partial(self.handle_ipc,

2703

parent_pipe=parent_pipe,

2704

proc=proc))

2705

2706

def handle_ipc(self, source, condition,

2707

parent_pipe=None,

2708

proc=None,

2709

client_object=None):

2031

2710

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

2032

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

2711

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

2033

2712

# Wait for other process to exit

2034

2713

proc.join()

2035

2714

return False

2036

2715

2037

2716

# Read a request from the child

2038

2717

request = parent_pipe.recv()

2039

2718

command = request[0]

2040

2719

2041

2720

if command == 'init':

2042

fpr = request[1]

2043

address = request[2]

2044

2045

for c in self.clients.itervalues():

2046

if c.fingerprint == fpr:

2721

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

2722

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

2723

address = request[3]

2724

2725

for c in self.clients.values():

2726

if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":

2727

continue

2728

if key_id and c.key_id == key_id:

2729

client = c

2730

break

2731

if fpr and c.fingerprint == fpr:

2047

2732

client = c

2048

2733

break

2049

2734

else:

2050

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

2051

"dress: %s", fpr, address)

2735

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

2736

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

2052

2737

if self.use_dbus:

2053

2738

# Emit D-Bus signal

2054

mandos_dbus_service.ClientNotFound(fpr,

2739

mandos_dbus_service.ClientNotFound(key_id or fpr,

2055

2740

address[0])

2056

2741

parent_pipe.send(False)

2057

2742

return False

2058

2059

gobject.io_add_watch(parent_pipe.fileno(),

2060

gobject.IO_IN | gobject.IO_HUP,

2061

functools.partial(self.handle_ipc,

2062

parent_pipe =

2063

parent_pipe,

2064

proc = proc,

2065

client_object =

2066

client))

2743

2744

GLib.io_add_watch(

2745

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

2746

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

2747

functools.partial(self.handle_ipc,

2748

parent_pipe=parent_pipe,

2749

proc=proc,

2750

client_object=client))

2067

2751

parent_pipe.send(True)

2068

2752

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

2069

2753

# same fileno

2072

2756

funcname = request[1]

2073

2757

args = request[2]

2074

2758

kwargs = request[3]

2075

2759

2076

2760

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

2077

2761

funcname)(*args,

2078

**kwargs)))

2079

2762

**kwargs)))

2763

2080

2764

if command == 'getattr':

2081

2765

attrname = request[1]

2082

if callable(client_object.__getattribute__(attrname)):

2083

parent_pipe.send(('function',))

2766

if isinstance(client_object.__getattribute__(attrname),

2767

collections.abc.Callable):

2768

parent_pipe.send(('function', ))

2084

2769

else:

2085

parent_pipe.send(('data', client_object

2086

.__getattribute__(attrname)))

2087

2770

parent_pipe.send((

2771

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

2772

2088

2773

if command == 'setattr':

2089

2774

attrname = request[1]

2090

2775

value = request[2]

2091

2776

setattr(client_object, attrname, value)

2092

2777

2093

2778

return True

2094

2779

2095

2780

2781

def rfc3339_duration_to_delta(duration):

2782

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

2783

2784

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

2785

True

2786

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

2787

True

2788

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

2789

True

2790

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

2791

True

2792

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

2793

True

2794

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

2795

True

2796

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

2797

True

2798

"""

2799

2800

# Parsing an RFC 3339 duration with regular expressions is not

2801

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

2802

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

2803

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

2804

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

2805

# avoid excessive use of external libraries.

2806

2807

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

2808

Token = collections.namedtuple("Token", (

2809

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

2810

# a "group" containing digits

2811

"value", # datetime.timedelta or None

2812

"followers")) # Tokens valid after this token

2813

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

2814

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

2815

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

2816

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

2817

datetime.timedelta(seconds=1),

2818

frozenset((token_end, )))

2819

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

2820

datetime.timedelta(minutes=1),

2821

frozenset((token_second, token_end)))

2822

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

2823

datetime.timedelta(hours=1),

2824

frozenset((token_minute, token_end)))

2825

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

2826

None,

2827

frozenset((token_hour, token_minute,

2828

token_second)))

2829

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

2830

datetime.timedelta(days=1),

2831

frozenset((token_time, token_end)))

2832

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

2833

datetime.timedelta(weeks=4),

2834

frozenset((token_day, token_end)))

2835

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

2836

datetime.timedelta(weeks=52),

2837

frozenset((token_month, token_end)))

2838

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

2839

datetime.timedelta(weeks=1),

2840

frozenset((token_end, )))

2841

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

2842

frozenset((token_year, token_month,

2843

token_day, token_time,

2844

token_week)))

2845

# Define starting values:

2846

# Value so far

2847

value = datetime.timedelta()

2848

found_token = None

2849

# Following valid tokens

2850

followers = frozenset((token_duration, ))

2851

# String left to parse

2852

s = duration

2853

# Loop until end token is found

2854

while found_token is not token_end:

2855

# Search for any currently valid tokens

2856

for token in followers:

2857

match = token.regexp.match(s)

2858

if match is not None:

2859

# Token found

2860

if token.value is not None:

2861

# Value found, parse digits

2862

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

2863

# Add to value so far

2864

value += factor * token.value

2865

# Strip token from string

2866

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

2867

# Go to found token

2868

found_token = token

2869

# Set valid next tokens

2870

followers = found_token.followers

2871

break

2872

else:

2873

# No currently valid tokens were found

2874

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

2875

.format(duration))

2876

# End token found

2877

return value

2878

2879

2096

2880

def string_to_delta(interval):

2097

2881

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

2098

2099

>>> string_to_delta('7d')

2100

datetime.timedelta(7)

2101

>>> string_to_delta('60s')

2102

datetime.timedelta(0, 60)

2103

>>> string_to_delta('60m')

2104

datetime.timedelta(0, 3600)

2105

>>> string_to_delta('24h')

2106

datetime.timedelta(1)

2107

>>> string_to_delta('1w')

2108

datetime.timedelta(7)

2109

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

2110

datetime.timedelta(0, 330)

2882

2883

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

2884

True

2885

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

2886

True

2887

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

2888

True

2889

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

2890

True

2891

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

2892

True

2893

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

2894

True

2111

2895

"""

2896

2897

try:

2898

return rfc3339_duration_to_delta(interval)

2899

except ValueError:

2900

pass

2901

2112

2902

timevalue = datetime.timedelta(0)

2113

2903

for s in interval.split():

2114

2904

try:

2115

suffix = unicode(s[-1])

2905

suffix = s[-1]

2116

2906

value = int(s[:-1])

2117

2907

if suffix == "d":

2118

2908

delta = datetime.timedelta(value)

2125

2915

elif suffix == "w":

2126

2916

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

2127

2917

else:

2128

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

2129

.format(suffix))

2130

except (ValueError, IndexError) as e:

2918

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

2919

except IndexError as e:

2131

2920

raise ValueError(*(e.args))

2132

2921

timevalue += delta

2133

2922

return timevalue

2134

2923

2135

2924

2136

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

2925

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

2137

2926

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

2138

2927

2139

2928

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

2140

2929

if os.fork():

2141

2930

sys.exit()

2149

2938

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

2150

2939

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

2151

2940

raise OSError(errno.ENODEV,

2152

"{0} not a character device"

2941

"{} not a character device"

2153

2942

.format(os.devnull))

2154

2943

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

2155

2944

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

2159

2948

2160

2949

2161

2950

def main():

2162

2951

2163

2952

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

2164

2953

# Parsing of options, both command line and config file

2165

2954

2166

2955

parser = argparse.ArgumentParser()

2167

2956

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

2168

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

2957

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

2169

2958

help="show version number and exit")

2170

2959

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

2171

2960

help="Bind to interface IF")

2177

2966

help="Run self-test")

2178

2967

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

2179

2968

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

2180

" to terminal")

2969

" to terminal", default=None)

2181

2970

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

2182

2971

help="Debug level for stdout output")

2183

2972

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

2190

2979

" files")

2191

2980

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

2192

2981

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

2193

" system bus interface")

2982

" system bus interface", default=None)

2194

2983

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

2195

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

2984

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

2985

default=None)

2196

2986

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

2197

2987

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

2198

" state")

2988

" state", default=None)

2199

2989

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

2200

2990

help="Specify a file descriptor to a network"

2201

2991

" socket to use instead of creating one")

2202

2992

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

2203

2993

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

2204

2994

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

2995

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

2996

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

2997

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

2998

default=None)

2999

2205

3000

options = parser.parse_args()

2206

2207

if options.check:

2208

import doctest

2209

doctest.testmod()

2210

sys.exit()

2211

3001

2212

3002

# Default values for config file for server-global settings

2213

server_defaults = { "interface": "",

2214

"address": "",

2215

"port": "",

2216

"debug": "False",

2217

"priority":

2218

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

2219

"servicename": "Mandos",

2220

"use_dbus": "True",

2221

"use_ipv6": "True",

2222

"debuglevel": "",

2223

"restore": "True",

2224

"socket": "",

2225

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

2226

}

2227

3003

if gnutls.has_rawpk:

3004

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

3005

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

3006

else:

3007

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

3008

":+SIGN-DSA-SHA256")

3009

server_defaults = {"interface": "",

3010

"address": "",

3011

"port": "",

3012

"debug": "False",

3013

"priority": priority,

3014

"servicename": "Mandos",

3015

"use_dbus": "True",

3016

"use_ipv6": "True",

3017

"debuglevel": "",

3018

"restore": "True",

3019

"socket": "",

3020

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

3021

"foreground": "False",

3022

"zeroconf": "True",

3023

}

3024

del priority

3025

2228

3026

# Parse config file for server-global settings

2229

server_config = configparser.SafeConfigParser(server_defaults)

3027

server_config = configparser.ConfigParser(server_defaults)

2230

3028

del server_defaults

2231

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

2232

"mandos.conf"))

2233

# Convert the SafeConfigParser object to a dict

3029

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

3030

# Convert the ConfigParser object to a dict

2234

3031

server_settings = server_config.defaults()

2235

3032

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

2236

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

3033

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

3034

"foreground", "zeroconf"):

2237

3035

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

2238

3036

option)

2239

3037

if server_settings["port"]:

2249

3047

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

2250

3048

["socket"])

2251

3049

del server_config

2252

3050

2253

3051

# Override the settings from the config file with command line

2254

3052

# options, if set.

2255

3053

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

2256

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

2257

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

2258

"statedir", "socket"):

3054

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

3055

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

3056

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

2259

3057

value = getattr(options, option)

2260

3058

if value is not None:

2261

3059

server_settings[option] = value

2262

3060

del options

2263

3061

# Force all strings to be unicode

2264

3062

for option in server_settings.keys():

2265

if type(server_settings[option]) is str:

2266

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

3063

if isinstance(server_settings[option], bytes):

3064

server_settings[option] = (server_settings[option]

3065

.decode("utf-8"))

3066

# Force all boolean options to be boolean

3067

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

3068

"foreground", "zeroconf"):

3069

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

3070

# Debug implies foreground

3071

if server_settings["debug"]:

3072

server_settings["foreground"] = True

2267

3073

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

2268

3074

2269

3075

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

2270

3076

3077

if (not server_settings["zeroconf"]

3078

and not (server_settings["port"]

3079

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

3080

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

3081

2271

3082

# For convenience

2272

3083

debug = server_settings["debug"]

2273

3084

debuglevel = server_settings["debuglevel"]

2275

3086

use_ipv6 = server_settings["use_ipv6"]

2276

3087

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

2277

3088

stored_state_file)

2278

3089

foreground = server_settings["foreground"]

3090

zeroconf = server_settings["zeroconf"]

3091

2279

3092

if debug:

2280

3093

initlogger(debug, logging.DEBUG)

2281

3094

else:

2284

3097

else:

2285

3098

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

2286

3099

initlogger(debug, level)

2287

3100

2288

3101

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

2289

syslogger.setFormatter(logging.Formatter

2290

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

2291

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

2292

.format(server_settings

2293

["servicename"])))

2294

3102

syslogger.setFormatter(

3103

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

3104

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

3105

server_settings["servicename"])))

3106

2295

3107

# Parse config file with clients

2296

client_config = configparser.SafeConfigParser(Client

2297

.client_defaults)

3108

client_config = configparser.ConfigParser(Client.client_defaults)

2298

3109

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

2299

3110

"clients.conf"))

2300

3111

2301

3112

global mandos_dbus_service

2302

3113

mandos_dbus_service = None

2303

2304

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

2305

server_settings["port"]),

2306

ClientHandler,

2307

interface=(server_settings["interface"]

2308

or None),

2309

use_ipv6=use_ipv6,

2310

gnutls_priority=

2311

server_settings["priority"],

2312

use_dbus=use_dbus,

2313

socketfd=(server_settings["socket"]

2314

or None))

2315

if not debug:

2316

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

3114

3115

socketfd = None

3116

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

3117

socketfd = server_settings["socket"]

3118

tcp_server = MandosServer(

3119

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

3120

ClientHandler,

3121

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

3122

use_ipv6=use_ipv6,

3123

gnutls_priority=server_settings["priority"],

3124

use_dbus=use_dbus,

3125

socketfd=socketfd)

3126

if not foreground:

3127

pidfilename = "/run/mandos.pid"

3128

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

3129

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

3130

pidfile = None

2317

3131

try:

2318

pidfile = open(pidfilename, "w")

3132

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

2319

3133

except IOError as e:

2320

3134

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

2321

3135

exc_info=e)

2322

2323

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

3136

3137

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

3138

("mandos", "mandos"),

3139

("nobody", "nogroup")):

2324

3140

try:

2325

3141

uid = pwd.getpwnam(name).pw_uid

2326

gid = pwd.getpwnam(name).pw_gid

3142

gid = pwd.getpwnam(group).pw_gid

2327

3143

break

2328

3144

except KeyError:

2329

3145

continue

2333

3149

try:

2334

3150

os.setgid(gid)

2335

3151

os.setuid(uid)

3152

if debug:

3153

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

3154

gid))

2336

3155

except OSError as error:

3156

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

3157

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

2337

3158

if error.errno != errno.EPERM:

2338

raise error

2339

3159

raise

3160

2340

3161

if debug:

2341

3162

# Enable all possible GnuTLS debugging

2342

3163

2343

3164

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

2344

3165

# - GnuTLS manual

2345

gnutls.library.functions.gnutls_global_set_log_level(11)

2346

2347

@gnutls.library.types.gnutls_log_func

3166

gnutls.global_set_log_level(11)

3167

3168

@gnutls.log_func

2348

3169

def debug_gnutls(level, string):

2349

3170

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

2350

2351

(gnutls.library.functions

2352

.gnutls_global_set_log_function(debug_gnutls))

2353

3171

3172

gnutls.global_set_log_function(debug_gnutls)

3173

2354

3174

# Redirect stdin so all checkers get /dev/null

2355

3175

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

2356

3176

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

2357

3177

if null > 2:

2358

3178

os.close(null)

2359

3179

2360

3180

# Need to fork before connecting to D-Bus

2361

if not debug:

3181

if not foreground:

2362

3182

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

2363

3183

daemon()

2364

2365

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

2366

# need to inform gobject that threads will be used.

2367

gobject.threads_init()

2368

3184

3185

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

3186

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

3187

# need to inform GLib that threads will be used.

3188

GLib.threads_init()

3189

2369

3190

global main_loop

2370

3191

# From the Avahi example code

2371

3192

DBusGMainLoop(set_as_default=True)

2372

main_loop = gobject.MainLoop()

3193

main_loop = GLib.MainLoop()

2373

3194

bus = dbus.SystemBus()

2374

3195

# End of Avahi example code

2375

3196

if use_dbus:

2376

3197

try:

2377

3198

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

2378

bus, do_not_queue=True)

2379

old_bus_name = (dbus.service.BusName

2380

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

2381

do_not_queue=True))

2382

except dbus.exceptions.NameExistsException as e:

3199

bus,

3200

do_not_queue=True)

3201

old_bus_name = dbus.service.BusName(

3202

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

3203

do_not_queue=True)

3204

except dbus.exceptions.DBusException as e:

2383

3205

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

2384

3206

use_dbus = False

2385

3207

server_settings["use_dbus"] = False

2386

3208

tcp_server.use_dbus = False

2387

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2388

service = AvahiServiceToSyslog(name =

2389

server_settings["servicename"],

2390

servicetype = "_mandos._tcp",

2391

protocol = protocol, bus = bus)

2392

if server_settings["interface"]:

2393

service.interface = (if_nametoindex

2394

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

2395

3209

if zeroconf:

3210

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

3211

service = AvahiServiceToSyslog(

3212

name=server_settings["servicename"],

3213

servicetype="_mandos._tcp",

3214

protocol=protocol,

3215

bus=bus)

3216

if server_settings["interface"]:

3217

service.interface = if_nametoindex(

3218

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

3219

2396

3220

global multiprocessing_manager

2397

3221

multiprocessing_manager = multiprocessing.Manager()

2398

3222

2399

3223

client_class = Client

2400

3224

if use_dbus:

2401

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

2402

3225

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

3226

2403

3227

client_settings = Client.config_parser(client_config)

2404

3228

old_client_settings = {}

2405

3229

clients_data = {}

2406

3230

3231

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

3232

global wnull

3233

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

3234

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

3235

# mode

3236

if debug or not foreground:

3237

wnull.close()

3238

2407

3239

# Get client data and settings from last running state.

2408

3240

if server_settings["restore"]:

2409

3241

try:

2410

3242

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

2411

clients_data, old_client_settings = (pickle.load

2412

(stored_state))

3243

if sys.version_info.major == 2:

3244

clients_data, old_client_settings = pickle.load(

3245

stored_state)

3246

else:

3247

bytes_clients_data, bytes_old_client_settings = (

3248

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

3249

# Fix bytes to strings

3250

# clients_data

3251

# .keys()

3252

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

3253

if isinstance(key, bytes)

3254

else key): value

3255

for key, value in

3256

bytes_clients_data.items()}

3257

del bytes_clients_data

3258

for key in clients_data:

3259

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

3260

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

3261

for k, v in

3262

clients_data[key].items()}

3263

clients_data[key] = value

3264

# .client_structure

3265

value["client_structure"] = [

3266

(s.decode("utf-8")

3267

if isinstance(s, bytes)

3268

else s) for s in

3269

value["client_structure"]]

3270

# .name, .host, and .checker_command

3271

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

3272

if isinstance(value[k], bytes):

3273

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

3274

if "key_id" not in value:

3275

value["key_id"] = ""

3276

elif "fingerprint" not in value:

3277

value["fingerprint"] = ""

3278

# old_client_settings

3279

# .keys()

3280

old_client_settings = {

3281

(key.decode("utf-8")

3282

if isinstance(key, bytes)

3283

else key): value

3284

for key, value in

3285

bytes_old_client_settings.items()}

3286

del bytes_old_client_settings

3287

# .host and .checker_command

3288

for value in old_client_settings.values():

3289

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

3290

if isinstance(value[attribute], bytes):

3291

value[attribute] = (value[attribute]

3292

.decode("utf-8"))

2413

3293

os.remove(stored_state_path)

2414

3294

except IOError as e:

2415

3295

if e.errno == errno.ENOENT:

2416

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

2417

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

3296

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

3297

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

2418

3298

else:

2419

3299

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

2420

3300

exc_info=e)

2421

3301

raise

2422

3302

except EOFError as e:

2423

3303

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

2424

"EOFError:", exc_info=e)

2425

3304

"EOFError:",

3305

exc_info=e)

3306

2426

3307

with PGPEngine() as pgp:

2427

for client_name, client in clients_data.iteritems():

3308

for client_name, client in clients_data.items():

3309

# Skip removed clients

3310

if client_name not in client_settings:

3311

continue

3312

2428

3313

# Decide which value to use after restoring saved state.

2429

3314

# We have three different values: Old config file,

2430

3315

# new config file, and saved state.

2435

3320

# For each value in new config, check if it

2436

3321

# differs from the old config value (Except for

2437

3322

# the "secret" attribute)

2438

if (name != "secret" and

2439

value != old_client_settings[client_name]

2440

[name]):

3323

if (name != "secret"

3324

and (value !=

3325

old_client_settings[client_name][name])):

2441

3326

client[name] = value

2442

3327

except KeyError:

2443

3328

pass

2444

3329

2445

3330

# Clients who has passed its expire date can still be

2446

# enabled if its last checker was successful. Clients

3331

# enabled if its last checker was successful. A Client

2447

3332

# whose checker succeeded before we stored its state is

2448

3333

# assumed to have successfully run all checkers during

2449

3334

# downtime.

2451

3336

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

2452

3337

if not client["last_checked_ok"]:

2453

3338

logger.warning(

2454

"disabling client {0} - Client never "

2455

"performed a successful checker"

2456

.format(client_name))

3339

"disabling client {} - Client never "

3340

"performed a successful checker".format(

3341

client_name))

2457

3342

client["enabled"] = False

2458

3343

elif client["last_checker_status"] != 0:

2459

3344

logger.warning(

2460

"disabling client {0} - Client "

2461

"last checker failed with error code {1}"

2462

.format(client_name,

2463

client["last_checker_status"]))

3345

"disabling client {} - Client last"

3346

" checker failed with error code"

3347

" {}".format(

3348

client_name,

3349

client["last_checker_status"]))

2464

3350

client["enabled"] = False

2465

3351

else:

2466

client["expires"] = (datetime.datetime

2467

.utcnow()

2468

+ client["timeout"])

3352

client["expires"] = (

3353

datetime.datetime.utcnow()

3354

+ client["timeout"])

2469

3355

logger.debug("Last checker succeeded,"

2470

" keeping {0} enabled"

2471

.format(client_name))

3356

" keeping {} enabled".format(

3357

client_name))

2472

3358

try:

2473

client["secret"] = (

2474

pgp.decrypt(client["encrypted_secret"],

2475

client_settings[client_name]

2476

["secret"]))

3359

client["secret"] = pgp.decrypt(

3360

client["encrypted_secret"],

3361

client_settings[client_name]["secret"])

2477

3362

except PGPError:

2478

3363

# If decryption fails, we use secret from new settings

2479

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

2480

.format(client_name))

2481

client["secret"] = (

2482

client_settings[client_name]["secret"])

2483

3364

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

3365

client_name))

3366

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

3367

["secret"])

3368

2484

3369

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

2485

3370

for client_name in (set(old_client_settings)

2486

3371

- set(client_settings)):

2488

3373

for client_name in (set(client_settings)

2489

3374

- set(old_client_settings)):

2490

3375

clients_data[client_name] = client_settings[client_name]

2491

3376

2492

3377

# Create all client objects

2493

for client_name, client in clients_data.iteritems():

3378

for client_name, client in clients_data.items():

2494

3379

tcp_server.clients[client_name] = client_class(

2495

name = client_name, settings = client)

2496

3380

name=client_name,

3381

settings=client,

3382

server_settings=server_settings)

3383

2497

3384

if not tcp_server.clients:

2498

3385

logger.warning("No clients defined")

2499

2500

if not debug:

2501

try:

2502

with pidfile:

2503

pid = os.getpid()

2504

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

2505

del pidfile

2506

except IOError:

2507

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

2508

pidfilename, pid)

2509

except NameError:

2510

# "pidfile" was never created

2511

pass

3386

3387

if not foreground:

3388

if pidfile is not None:

3389

pid = os.getpid()

3390

try:

3391

with pidfile:

3392

print(pid, file=pidfile)

3393

except IOError:

3394

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

3395

pidfilename, pid)

3396

del pidfile

2512

3397

del pidfilename

2513

2514

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

2515

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

2516

3398

3399

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

3400

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3401

lambda: main_loop.quit() and False)

3402

2517

3403

if use_dbus:

2518

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

2519

"se.bsnet.fukt.Mandos"})

2520

class MandosDBusService(DBusObjectWithProperties):

3404

3405

@alternate_dbus_interfaces(

3406

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

3407

class MandosDBusService(DBusObjectWithObjectManager):

2521

3408

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

3409

2522

3410

def __init__(self):

2523

3411

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

3412

2524

3413

_interface = "se.recompile.Mandos"

2525

2526

@dbus_interface_annotations(_interface)

2527

def _foo(self):

2528

return { "org.freedesktop.DBus.Property"

2529

".EmitsChangedSignal":

2530

"false"}

2531

3414

2532

3415

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

2533

3416

def ClientAdded(self, objpath):

2534

3417

"D-Bus signal"

2535

3418

pass

2536

3419

2537

3420

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

2538

def ClientNotFound(self, fingerprint, address):

3421

def ClientNotFound(self, key_id, address):

2539

3422

"D-Bus signal"

2540

3423

pass

2541

3424

3425

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

3426

"true"})

2542

3427

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

2543

3428

def ClientRemoved(self, objpath, name):

2544

3429

"D-Bus signal"

2545

3430

pass

2546

3431

3432

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

3433

"true"})

2547

3434

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

2548

3435

def GetAllClients(self):

2549

3436

"D-Bus method"

2550

return dbus.Array(c.dbus_object_path

2551

for c in

2552

tcp_server.clients.itervalues())

2553

3437

return dbus.Array(c.dbus_object_path for c in

3438

tcp_server.clients.values())

3439

3440

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

3441

"true"})

2554

3442

@dbus.service.method(_interface,

2555

3443

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

2556

3444

def GetAllClientsWithProperties(self):

2557

3445

"D-Bus method"

2558

3446

return dbus.Dictionary(

2559

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

2560

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

3447

{c.dbus_object_path: c.GetAll(

3448

"se.recompile.Mandos.Client")

3449

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

2561

3450

signature="oa{sv}")

2562

3451

2563

3452

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

2564

3453

def RemoveClient(self, object_path):

2565

3454

"D-Bus method"

2566

for c in tcp_server.clients.itervalues():

3455

for c in tcp_server.clients.values():

2567

3456

if c.dbus_object_path == object_path:

2568

3457

del tcp_server.clients[c.name]

2569

3458

c.remove_from_connection()

2570

# Don't signal anything except ClientRemoved

3459

# Don't signal the disabling

2571

3460

c.disable(quiet=True)

2572

# Emit D-Bus signal

2573

self.ClientRemoved(object_path, c.name)

3461

# Emit D-Bus signal for removal

3462

self.client_removed_signal(c)

2574

3463

return

2575

3464

raise KeyError(object_path)

2576

3465

2577

3466

del _interface

2578

3467

3468

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3469

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

3470

def GetManagedObjects(self):

3471

"""D-Bus method"""

3472

return dbus.Dictionary(

3473

{client.dbus_object_path:

3474

dbus.Dictionary(

3475

{interface: client.GetAll(interface)

3476

for interface in

3477

client._get_all_interface_names()})

3478

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

3479

3480

def client_added_signal(self, client):

3481

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

3482

if use_dbus:

3483

# New standard signal

3484

self.InterfacesAdded(

3485

client.dbus_object_path,

3486

dbus.Dictionary(

3487

{interface: client.GetAll(interface)

3488

for interface in

3489

client._get_all_interface_names()}))

3490

# Old signal

3491

self.ClientAdded(client.dbus_object_path)

3492

3493

def client_removed_signal(self, client):

3494

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

3495

if use_dbus:

3496

# New standard signal

3497

self.InterfacesRemoved(

3498

client.dbus_object_path,

3499

client._get_all_interface_names())

3500

# Old signal

3501

self.ClientRemoved(client.dbus_object_path,

3502

client.name)

3503

2579

3504

mandos_dbus_service = MandosDBusService()

2580

3505

3506

# Save modules to variables to exempt the modules from being

3507

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

3508

mp = multiprocessing

3509

wn = wnull

3510

2581

3511

def cleanup():

2582

3512

"Cleanup function; run on exit"

2583

service.cleanup()

2584

2585

multiprocessing.active_children()

3513

if zeroconf:

3514

service.cleanup()

3515

3516

mp.active_children()

3517

wn.close()

2586

3518

if not (tcp_server.clients or client_settings):

2587

3519

return

2588

3520

2589

3521

# Store client before exiting. Secrets are encrypted with key

2590

3522

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

2591

3523

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

2592

3524

clients = {}

2593

3525

with PGPEngine() as pgp:

2594

for client in tcp_server.clients.itervalues():

3526

for client in tcp_server.clients.values():

2595

3527

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

2596

3528

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

2597

3529

key)

2598

3530

client_dict = {}

2599

3531

2600

3532

# A list of attributes that can not be pickled

2601

3533

# + secret.

2602

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

2603

"checker"))

2604

for name, typ in (inspect.getmembers

2605

(dbus.service.Object)):

3534

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

3535

"checker", "server_settings"}

3536

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

3537

.Object):

2606

3538

exclude.add(name)

2607

3539

2608

3540

client_dict["encrypted_secret"] = (client

2609

3541

.encrypted_secret)

2610

3542

for attr in client.client_structure:

2611

3543

if attr not in exclude:

2612

3544

client_dict[attr] = getattr(client, attr)

2613

3545

2614

3546

clients[client.name] = client_dict

2615

3547

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

2616

3548

2617

3549

try:

2618

with (tempfile.NamedTemporaryFile

2619

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

2620

dir=os.path.dirname(stored_state_path),

2621

delete=False)) as stored_state:

2622

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

2623

tempname=stored_state.name

3550

with tempfile.NamedTemporaryFile(

3551

mode='wb',

3552

suffix=".pickle",

3553

prefix='clients-',

3554

dir=os.path.dirname(stored_state_path),

3555

delete=False) as stored_state:

3556

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

3557

protocol=2)

3558

tempname = stored_state.name

2624

3559

os.rename(tempname, stored_state_path)

2625

3560

except (IOError, OSError) as e:

2626

3561

if not debug:

2629

3564

except NameError:

2630

3565

pass

2631

3566

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

2632

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

3567

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

2633

3568

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

2634

3569

else:

2635

3570

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

2636

3571

exc_info=e)

2637

raise e

2638

3572

raise

3573

2639

3574

# Delete all clients, and settings from config

2640

3575

while tcp_server.clients:

2641

3576

name, client = tcp_server.clients.popitem()

2642

3577

if use_dbus:

2643

3578

client.remove_from_connection()

2644

# Don't signal anything except ClientRemoved

3579

# Don't signal the disabling

2645

3580

client.disable(quiet=True)

3581

# Emit D-Bus signal for removal

2646

3582

if use_dbus:

2647

# Emit D-Bus signal

2648

mandos_dbus_service.ClientRemoved(client

2649

.dbus_object_path,

2650

client.name)

3583

mandos_dbus_service.client_removed_signal(client)

2651

3584

client_settings.clear()

2652

3585

2653

3586

atexit.register(cleanup)

2654

2655

for client in tcp_server.clients.itervalues():

3587

3588

for client in tcp_server.clients.values():

2656

3589

if use_dbus:

2657

# Emit D-Bus signal

2658

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3590

# Emit D-Bus signal for adding

3591

mandos_dbus_service.client_added_signal(client)

2659

3592

# Need to initiate checking of clients

2660

3593

if client.enabled:

2661

3594

client.init_checker()

2662

3595

2663

3596

tcp_server.enable()

2664

3597

tcp_server.server_activate()

2665

3598

2666

3599

# Find out what port we got

2667

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

3600

if zeroconf:

3601

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

2668

3602

if use_ipv6:

2669

3603

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

2670

3604

" flowinfo %d, scope_id %d",

2672

3606

else: # IPv4

2673

3607

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

2674

3608

*tcp_server.socket.getsockname())

2675

2676

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

2677

3609

3610

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

3611

2678

3612

try:

2679

# From the Avahi example code

2680

try:

2681

service.activate()

2682

except dbus.exceptions.DBusException as error:

2683

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

2684

cleanup()

2685

sys.exit(1)

2686

# End of Avahi example code

2687

2688

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

2689

lambda *args, **kwargs:

2690

(tcp_server.handle_request

2691

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

2692

3613

if zeroconf:

3614

# From the Avahi example code

3615

try:

3616

service.activate()

3617

except dbus.exceptions.DBusException as error:

3618

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

3619

cleanup()

3620

sys.exit(1)

3621

# End of Avahi example code

3622

3623

GLib.io_add_watch(

3624

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

3625

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

3626

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

3627

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

3628

2693

3629

logger.debug("Starting main loop")

2694

3630

main_loop.run()

2695

3631

except AvahiError as error:

2704

3640

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

2705

3641

cleanup()

2706

3642

3643

3644

def should_only_run_tests():

3645

parser = argparse.ArgumentParser(add_help=False)

3646

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

3647

args, unknown_args = parser.parse_known_args()

3648

run_tests = args.check

3649

if run_tests:

3650

# Remove --check argument from sys.argv

3651

sys.argv[1:] = unknown_args

3652

return run_tests

3653

3654

# Add all tests from doctest strings

3655

def load_tests(loader, tests, none):

3656

import doctest

3657

tests.addTests(doctest.DocTestSuite())

3658

return tests

3659

2707

3660

if __name__ == '__main__':

2708

main()

3661

try:

3662

if should_only_run_tests():

3663

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

3664

unittest.main()

3665

else:

3666

main()

3667

finally:

3668

logging.shutdown()