/mandos/trunk : revision 237.4.131

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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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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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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 = "1.6.2"

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# In Python 2.7 it seems to have been removed entirely.

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# Try running the C preprocessor:

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try:

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cc = subprocess.Popen(["cc", "--language=c", "-E",

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"/dev/stdin"],

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE)

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stdout = cc.communicate(

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"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]

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SO_BINDTODEVICE = int(stdout.splitlines()[-1])

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except (OSError, ValueError, IndexError):

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# No value found

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SO_BINDTODEVICE = None

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if sys.version_info < (3, 2):

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configparser.Configparser = configparser.SafeConfigParser

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version = "1.8.11"

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

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self.gpg = "gpg"

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try:

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

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for line in output.splitlines():

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

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if name == 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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'--home', self.tempdir,

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'--homedir', self.tempdir,

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'--force-mdc',

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'--quiet',

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'--no-use-agent']

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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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237

152

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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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241

156

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def __del__(self):

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self._cleanup()

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159

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def _cleanup(self):

160

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if self.tempdir is not None:

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# Delete contents of tempdir

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

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topdown = False):

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topdown=False):

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for filename in files:

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

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for dirname in dirs:

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# Remove tempdir

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os.rmdir(self.tempdir)

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self.tempdir = None

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

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

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return encoded

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183

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def encrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(dir=self.tempdir

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) as passfile:

271

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(['gpg', '--symmetric',

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE,

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stderr=subprocess.PIPE)

282

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

197

283

if proc.returncode != 0:

198

284

raise PGPError(err)

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285

return ciphertext

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286

201

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def decrypt(self, data, password):

202

288

passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(dir = self.tempdir

204

) as passfile:

289

with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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291

passfile.write(passphrase)

206

292

passfile.flush()

207

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

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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decrypted_plaintext, err = proc.communicate(input

215

= data)

297

stdin=subprocess.PIPE,

298

stdout=subprocess.PIPE,

299

stderr=subprocess.PIPE)

300

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

216

301

if proc.returncode != 0:

217

302

raise PGPError(err)

218

303

return decrypted_plaintext

219

304

220

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

312

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"

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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

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SERVER_INVALID = 0 # avahi-common/defs.h

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SERVER_REGISTERING = 1 # avahi-common/defs.h

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SERVER_RUNNING = 2 # avahi-common/defs.h

328

SERVER_COLLISION = 3 # avahi-common/defs.h

329

SERVER_FAILURE = 4 # avahi-common/defs.h

330

331

221

332

class AvahiError(Exception):

222

333

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

223

334

self.value = value

224

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

225

def __unicode__(self):

226

return unicode(repr(self.value))

335

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

336

**kwargs)

337

227

338

228

339

class AvahiServiceError(AvahiError):

229

340

pass

230

341

342

231

343

class AvahiGroupError(AvahiError):

232

344

pass

233

345

234

346

235

class AvahiService(object):

347

class AvahiService:

236

348

"""An Avahi (Zeroconf) service.

237

349

238

350

Attributes:

239

351

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

240

352

Used to optionally bind to the specified interface.

252

364

server: D-Bus Server

253

365

bus: dbus.SystemBus()

254

366

"""

255

256

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

257

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

258

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

259

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):

260

379

self.interface = interface

261

380

self.name = name

262

381

self.type = servicetype

271

390

self.server = None

272

391

self.bus = bus

273

392

self.entry_group_state_changed_match = None

274

275

def rename(self):

393

394

def rename(self, remove=True):

276

395

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

277

396

if self.rename_count >= self.max_renames:

278

397

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

279

398

" after %i retries, exiting.",

280

399

self.rename_count)

281

400

raise AvahiServiceError("Too many renames")

282

self.name = unicode(self.server

283

.GetAlternativeServiceName(self.name))

401

self.name = str(

402

self.server.GetAlternativeServiceName(self.name))

403

self.rename_count += 1

284

404

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

285

405

self.name)

286

self.remove()

406

if remove:

407

self.remove()

287

408

try:

288

409

self.add()

289

410

except dbus.exceptions.DBusException as error:

290

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

291

self.cleanup()

292

os._exit(1)

293

self.rename_count += 1

294

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

295

420

def remove(self):

296

421

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

297

422

if self.entry_group_state_changed_match is not None:

299

424

self.entry_group_state_changed_match = None

300

425

if self.group is not None:

301

426

self.group.Reset()

302

427

303

428

def add(self):

304

429

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

305

430

self.remove()

322

447

dbus.UInt16(self.port),

323

448

avahi.string_array_to_txt_array(self.TXT))

324

449

self.group.Commit()

325

450

326

451

def entry_group_state_changed(self, state, error):

327

452

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

328

453

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

329

454

330

455

if state == avahi.ENTRY_GROUP_ESTABLISHED:

331

456

logger.debug("Zeroconf service established.")

332

457

elif state == avahi.ENTRY_GROUP_COLLISION:

334

459

self.rename()

335

460

elif state == avahi.ENTRY_GROUP_FAILURE:

336

461

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

337

unicode(error))

338

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

339

.format(error))

340

462

str(error))

463

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

464

341

465

def cleanup(self):

342

466

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

343

467

if self.group is not None:

348

472

pass

349

473

self.group = None

350

474

self.remove()

351

475

352

476

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

353

477

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

354

478

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

355

bad_states = { avahi.SERVER_INVALID:

356

"Zeroconf server invalid",

357

avahi.SERVER_REGISTERING: None,

358

avahi.SERVER_COLLISION:

359

"Zeroconf server name collision",

360

avahi.SERVER_FAILURE:

361

"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

}

362

485

if state in bad_states:

363

486

if bad_states[state] is not None:

364

487

if error is None:

367

490

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

368

491

self.cleanup()

369

492

elif state == avahi.SERVER_RUNNING:

370

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)

371

505

else:

372

506

if error is None:

373

507

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

374

508

else:

375

509

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

376

510

377

511

def activate(self):

378

512

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

379

513

if self.server is None:

383

517

follow_name_owner_changes=True),

384

518

avahi.DBUS_INTERFACE_SERVER)

385

519

self.server.connect_to_signal("StateChanged",

386

self.server_state_changed)

520

self.server_state_changed)

387

521

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

388

522

389

523

390

524

class AvahiServiceToSyslog(AvahiService):

391

def rename(self):

525

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

392

526

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

393

ret = AvahiService.rename(self)

394

syslogger.setFormatter(logging.Formatter

395

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

396

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

397

.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)))

398

531

return ret

399

532

400

533

401

def timedelta_to_milliseconds(td):

402

"Convert a datetime.timedelta() to milliseconds"

403

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

404

+ (td.seconds * 1000)

405

+ (td.microseconds // 1000))

406

407

408

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:

409

847

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

410

848

411

849

Attributes:

412

850

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

413

851

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

414

852

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

415

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

416

to see if the client lives.

417

'None' if no process is running.

418

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

419

857

checker_command: string; External command which is run to check

420

858

if client lives. %() expansions are done at

421

859

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

422

860

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

423

checker_initiator_tag: a gobject event source tag, or None

861

checker_initiator_tag: a GLib event source tag, or None

424

862

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

425

863

client_structure: Object describing what attributes a client has

426

864

and is used for storing the client at exit

427

865

current_checker_command: string; current running checker_command

428

disable_initiator_tag: a gobject event source tag, or None

866

disable_initiator_tag: a GLib event source tag, or None

429

867

enabled: bool()

430

868

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

431

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

432

872

host: string; available for use by the checker command

433

873

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

434

874

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

436

876

last_checker_status: integer between 0 and 255 reflecting exit

437

877

status of last checker. -1 reflects crashed

438

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

439

881

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

440

882

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

441

883

D-Bus identifiers

448

890

disabled, or None

449

891

server_settings: The server_settings dict from main()

450

892

"""

451

893

452

894

runtime_expansions = ("approval_delay", "approval_duration",

453

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

895

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

454

896

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

455

897

"last_approval_request", "last_checked_ok",

456

898

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

457

client_defaults = { "timeout": "PT5M",

458

"extended_timeout": "PT15M",

459

"interval": "PT2M",

460

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

461

"host": "",

462

"approval_delay": "PT0S",

463

"approval_duration": "PT1S",

464

"approved_by_default": "True",

465

"enabled": "True",

466

}

467

468

def timeout_milliseconds(self):

469

"Return the 'timeout' attribute in milliseconds"

470

return timedelta_to_milliseconds(self.timeout)

471

472

def extended_timeout_milliseconds(self):

473

"Return the 'extended_timeout' attribute in milliseconds"

474

return timedelta_to_milliseconds(self.extended_timeout)

475

476

def interval_milliseconds(self):

477

"Return the 'interval' attribute in milliseconds"

478

return timedelta_to_milliseconds(self.interval)

479

480

def approval_delay_milliseconds(self):

481

return timedelta_to_milliseconds(self.approval_delay)

482

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

483

911

@staticmethod

484

912

def config_parser(config):

485

913

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

492

920

for client_name in config.sections():

493

921

section = dict(config.items(client_name))

494

922

client = settings[client_name] = {}

495

923

496

924

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

497

925

# Reformat values from string types to Python types

498

926

client["approved_by_default"] = config.getboolean(

499

927

client_name, "approved_by_default")

500

928

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

501

929

"enabled")

502

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(" ", ""))

503

936

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

504

937

.replace(" ", ""))

505

938

if "secret" in section:

506

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

939

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

940

.encode("utf-8"),

941

"base64")

507

942

elif "secfile" in section:

508

943

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

509

944

(section["secfile"])),

510

945

"rb") as secfile:

511

946

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

512

947

else:

513

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

948

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

514

949

.format(section))

515

950

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

516

951

client["extended_timeout"] = string_to_delta(

524

959

client["last_approval_request"] = None

525

960

client["last_checked_ok"] = None

526

961

client["last_checker_status"] = -2

527

962

528

963

return settings

529

530

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

964

965

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

531

966

self.name = name

532

967

if server_settings is None:

533

968

server_settings = {}

534

969

self.server_settings = server_settings

535

970

# adding all client settings

536

for setting, value in settings.iteritems():

971

for setting, value in settings.items():

537

972

setattr(self, setting, value)

538

973

539

974

if self.enabled:

540

975

if not hasattr(self, "last_enabled"):

541

976

self.last_enabled = datetime.datetime.utcnow()

545

980

else:

546

981

self.last_enabled = None

547

982

self.expires = None

548

983

549

984

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

550

# Uppercase and remove spaces from fingerprint for later

551

# comparison purposes with return value from the fingerprint()

552

# function

985

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

553

986

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

554

987

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

555

988

datetime.datetime.utcnow())

556

989

557

990

# attributes specific for this server instance

558

991

self.checker = None

559

992

self.checker_initiator_tag = None

562

995

self.current_checker_command = None

563

996

self.approved = None

564

997

self.approvals_pending = 0

565

self.changedstate = (multiprocessing_manager

566

.Condition(multiprocessing_manager

567

.Lock()))

568

self.client_structure = [attr for attr in

569

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()

570

1002

if not attr.startswith("_")]

571

1003

self.client_structure.append("client_structure")

572

573

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

574

lambda obj:

575

isinstance(obj,

576

property)):

1004

1005

for name, t in inspect.getmembers(

1006

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

577

1007

if not name.startswith("_"):

578

1008

self.client_structure.append(name)

579

1009

580

1010

# Send notice to process children that client state has changed

581

1011

def send_changedstate(self):

582

1012

with self.changedstate:

583

1013

self.changedstate.notify_all()

584

1014

585

1015

def enable(self):

586

1016

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

587

1017

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

592

1022

self.last_enabled = datetime.datetime.utcnow()

593

1023

self.init_checker()

594

1024

self.send_changedstate()

595

1025

596

1026

def disable(self, quiet=True):

597

1027

"""Disable this client."""

598

1028

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

600

1030

if not quiet:

601

1031

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

602

1032

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

603

gobject.source_remove(self.disable_initiator_tag)

1033

GLib.source_remove(self.disable_initiator_tag)

604

1034

self.disable_initiator_tag = None

605

1035

self.expires = None

606

1036

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

607

gobject.source_remove(self.checker_initiator_tag)

1037

GLib.source_remove(self.checker_initiator_tag)

608

1038

self.checker_initiator_tag = None

609

1039

self.stop_checker()

610

1040

self.enabled = False

611

1041

if not quiet:

612

1042

self.send_changedstate()

613

# 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

614

1044

return False

615

1045

616

1046

def __del__(self):

617

1047

self.disable()

618

1048

619

1049

def init_checker(self):

620

1050

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

621

1051

# and every interval from then on.

622

1052

if self.checker_initiator_tag is not None:

623

gobject.source_remove(self.checker_initiator_tag)

624

self.checker_initiator_tag = (gobject.timeout_add

625

(self.interval_milliseconds(),

626

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)

627

1058

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

628

1059

if self.disable_initiator_tag is not None:

629

gobject.source_remove(self.disable_initiator_tag)

630

self.disable_initiator_tag = (gobject.timeout_add

631

(self.timeout_milliseconds(),

632

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)

633

1063

# Also start a new checker *right now*.

634

1064

self.start_checker()

635

636

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

1065

1066

def checker_callback(self, source, condition, connection,

1067

command):

637

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()

638

1074

self.checker_callback_tag = None

639

1075

self.checker = None

640

if os.WIFEXITED(condition):

641

self.last_checker_status = os.WEXITSTATUS(condition)

1076

1077

if returncode >= 0:

1078

self.last_checker_status = returncode

1079

self.last_checker_signal = None

642

1080

if self.last_checker_status == 0:

643

1081

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

644

1082

vars(self))

645

1083

self.checked_ok()

646

1084

else:

647

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

648

vars(self))

1085

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

649

1086

else:

650

1087

self.last_checker_status = -1

1088

self.last_checker_signal = -returncode

651

1089

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

652

1090

vars(self))

653

1091

return False

1092

654

1093

def checked_ok(self):

655

1094

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

656

1095

self.last_checked_ok = datetime.datetime.utcnow()

657

1096

self.last_checker_status = 0

1097

self.last_checker_signal = None

658

1098

self.bump_timeout()

659

1099

660

1100

def bump_timeout(self, timeout=None):

661

1101

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

662

1102

if timeout is None:

663

1103

timeout = self.timeout

664

1104

if self.disable_initiator_tag is not None:

665

gobject.source_remove(self.disable_initiator_tag)

1105

GLib.source_remove(self.disable_initiator_tag)

666

1106

self.disable_initiator_tag = None

667

1107

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

668

self.disable_initiator_tag = (gobject.timeout_add

669

(timedelta_to_milliseconds

670

(timeout), self.disable))

1108

self.disable_initiator_tag = GLib.timeout_add(

1109

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

671

1110

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

672

1111

673

1112

def need_approval(self):

674

1113

self.last_approval_request = datetime.datetime.utcnow()

675

1114

676

1115

def start_checker(self):

677

1116

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

678

1117

679

1118

If a checker already exists, leave it running and do

680

1119

nothing."""

681

1120

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

686

1125

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

687

1126

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

688

1127

# should be.

689

690

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

691

try:

692

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

693

except AttributeError:

694

pass

695

except OSError as error:

696

if error.errno != errno.ECHILD:

697

raise

698

else:

699

if pid:

700

logger.warning("Checker was a zombie")

701

gobject.source_remove(self.checker_callback_tag)

702

self.checker_callback(pid, status,

703

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

704

1133

# Start a new checker if needed

705

1134

if self.checker is None:

706

1135

# Escape attributes for the shell

707

escaped_attrs = dict(

708

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

709

for attr in

710

self.runtime_expansions)

1136

escaped_attrs = {

1137

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

1138

for attr in self.runtime_expansions}

711

1139

try:

712

1140

command = self.checker_command % escaped_attrs

713

1141

except TypeError as error:

714

1142

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

715

self.checker_command, exc_info=error)

716

return True # Try again later

1143

self.checker_command,

1144

exc_info=error)

1145

return True # Try again later

717

1146

self.current_checker_command = command

718

try:

719

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

720

command, self.name)

721

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

722

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

723

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

724

# always replaced by /dev/null.)

725

# The exception is when not debugging but nevertheless

726

# running in the foreground; use the previously

727

# created wnull.

728

popen_args = {}

729

if (not self.server_settings["debug"]

730

and self.server_settings["foreground"]):

731

popen_args.update({"stdout": wnull,

732

"stderr": wnull })

733

self.checker = subprocess.Popen(command,

734

close_fds=True,

735

shell=True, cwd="/",

736

**popen_args)

737

except OSError as error:

738

logger.error("Failed to start subprocess",

739

exc_info=error)

740

return True

741

self.checker_callback_tag = (gobject.child_watch_add

742

(self.checker.pid,

743

self.checker_callback,

744

data=command))

745

# The checker may have completed before the gobject

746

# watch was added. Check for this.

747

try:

748

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

749

except OSError as error:

750

if error.errno == errno.ECHILD:

751

# This should never happen

752

logger.error("Child process vanished",

753

exc_info=error)

754

return True

755

raise

756

if pid:

757

gobject.source_remove(self.checker_callback_tag)

758

self.checker_callback(pid, status, command)

759

# 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

760

1174

return True

761

1175

762

1176

def stop_checker(self):

763

1177

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

764

1178

if self.checker_callback_tag:

765

gobject.source_remove(self.checker_callback_tag)

1179

GLib.source_remove(self.checker_callback_tag)

766

1180

self.checker_callback_tag = None

767

1181

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

768

1182

return

769

1183

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

770

try:

771

self.checker.terminate()

772

#time.sleep(0.5)

773

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

774

# self.checker.kill()

775

except OSError as error:

776

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

777

raise

1184

self.checker.terminate()

778

1185

self.checker = None

779

1186

780

1187

781

def dbus_service_property(dbus_interface, signature="v",

782

access="readwrite", byte_arrays=False):

1188

def dbus_service_property(dbus_interface,

1189

signature="v",

1190

access="readwrite",

1191

byte_arrays=False):

783

1192

"""Decorators for marking methods of a DBusObjectWithProperties to

784

1193

become properties on the D-Bus.

785

1194

786

1195

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

787

1196

and with one argument by "Set".

788

1197

789

1198

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

790

1199

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

791

1200

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

794

1203

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

795

1204

if byte_arrays and signature != "ay":

796

1205

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

797

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

1206

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

1207

798

1208

def decorator(func):

799

1209

func._dbus_is_property = True

800

1210

func._dbus_interface = dbus_interface

803

1213

func._dbus_name = func.__name__

804

1214

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

805

1215

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

806

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1216

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

807

1217

return func

1218

808

1219

return decorator

809

1220

810

1221

811

1222

def dbus_interface_annotations(dbus_interface):

812

1223

"""Decorator for marking functions returning interface annotations

813

1224

814

1225

Usage:

815

1226

816

1227

@dbus_interface_annotations("org.example.Interface")

817

1228

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

818

1229

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

819

1230

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

820

1231

"false"}

821

1232

"""

1233

822

1234

def decorator(func):

823

1235

func._dbus_is_interface = True

824

1236

func._dbus_interface = dbus_interface

825

1237

func._dbus_name = dbus_interface

826

1238

return func

1239

827

1240

return decorator

828

1241

829

1242

830

1243

def dbus_annotations(annotations):

831

1244

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

832

1245

Usage:

833

1246

1247

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

1248

"org.freedesktop.DBus.Property."

1249

"EmitsChangedSignal": "false"})

834

1250

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

835

1251

access="r")

836

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

837

"org.freedesktop.DBus.Property."

838

"EmitsChangedSignal": "false"})

839

1252

def Property_dbus_property(self):

840

1253

return dbus.Boolean(False)

1254

1255

See also the DBusObjectWithAnnotations class.

841

1256

"""

1257

842

1258

def decorator(func):

843

1259

func._dbus_annotations = annotations

844

1260

return func

1261

845

1262

return decorator

846

1263

847

1264

848

1265

class DBusPropertyException(dbus.exceptions.DBusException):

849

1266

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

850

1267

"""

851

def __unicode__(self):

852

return unicode(str(self))

1268

pass

853

1269

854

1270

855

1271

class DBusPropertyAccessException(DBusPropertyException):

864

1280

pass

865

1281

866

1282

867

class DBusObjectWithProperties(dbus.service.Object):

868

"""A D-Bus object with properties.

869

870

Classes inheriting from this can use the dbus_service_property

871

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

872

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.

873

1288

"""

874

1289

875

1290

@staticmethod

876

1291

def _is_dbus_thing(thing):

877

1292

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

878

1293

879

1294

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

880

1295

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

881

1296

"""

882

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

1297

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

883

1298

False)

884

1299

885

1300

def _get_all_dbus_things(self, thing):

886

1301

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

887

1302

"""

888

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

889

name),

1303

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

890

1304

athing.__get__(self))

891

1305

for cls in self.__class__.__mro__

892

1306

for name, athing in

893

inspect.getmembers(cls,

894

self._is_dbus_thing(thing)))

895

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

896

1380

def _get_dbus_property(self, interface_name, property_name):

897

1381

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

898

1382

property with the specified name and interface.

899

1383

"""

900

for cls in self.__class__.__mro__:

901

for name, value in (inspect.getmembers

902

(cls,

903

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")):

904

1387

if (value._dbus_name == property_name

905

1388

and value._dbus_interface == interface_name):

906

1389

return value.__get__(self)

907

1390

908

1391

# No such property

909

raise DBusPropertyNotFound(self.dbus_object_path + ":"

910

+ interface_name + "."

911

+ property_name)

912

913

@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",

914

1406

out_signature="v")

915

1407

def Get(self, interface_name, property_name):

916

1408

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

922

1414

if not hasattr(value, "variant_level"):

923

1415

return value

924

1416

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

925

1417

926

1418

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

927

1419

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

928

1420

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

934

1426

# The byte_arrays option is not supported yet on

935

1427

# signatures other than "ay".

936

1428

if prop._dbus_signature != "ay":

937

raise ValueError

938

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

939

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))

940

1433

prop(value)

941

942

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

1434

1435

@dbus.service.method(dbus.PROPERTIES_IFACE,

1436

in_signature="s",

943

1437

out_signature="a{sv}")

944

1438

def GetAll(self, interface_name):

945

1439

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

946

1440

standard.

947

1441

948

1442

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

949

1443

"""

950

1444

properties = {}

960

1454

if not hasattr(value, "variant_level"):

961

1455

properties[name] = value

962

1456

continue

963

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

964

value.variant_level+1)

1457

properties[name] = type(value)(

1458

value, variant_level=value.variant_level + 1)

965

1459

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

966

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

967

1469

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

968

1470

out_signature="s",

969

1471

path_keyword='object_path',

970

1472

connection_keyword='connection')

971

1473

def Introspect(self, object_path, connection):

972

1474

"""Overloading of standard D-Bus method.

973

1475

974

1476

Inserts property tags and interface annotation tags.

975

1477

"""

976

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

977

connection)

1478

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1479

object_path,

1480

connection)

978

1481

try:

979

1482

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

1483

980

1484

def make_tag(document, name, prop):

981

1485

e = document.createElement("property")

982

1486

e.setAttribute("name", name)

983

1487

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

984

1488

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

985

1489

return e

1490

986

1491

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

987

1492

# Add property tags

988

1493

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

991

1496

if prop._dbus_interface

992

1497

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

993

1498

if_tag.appendChild(tag)

994

# Add annotation tags

995

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

996

for tag in if_tag.getElementsByTagName(typ):

997

annots = dict()

998

for name, prop in (self.

999

_get_all_dbus_things(typ)):

1000

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

1001

and prop._dbus_interface

1002

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

1003

annots.update(getattr

1004

(prop,

1005

"_dbus_annotations",

1006

{}))

1007

for name, value in annots.iteritems():

1008

ann_tag = document.createElement(

1009

"annotation")

1010

ann_tag.setAttribute("name", name)

1011

ann_tag.setAttribute("value", value)

1012

tag.appendChild(ann_tag)

1013

# Add interface annotation tags

1014

for annotation, value in dict(

1015

itertools.chain.from_iterable(

1016

annotations().iteritems()

1017

for name, annotations in

1018

self._get_all_dbus_things("interface")

1019

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

1020

)).iteritems():

1021

ann_tag = document.createElement("annotation")

1022

ann_tag.setAttribute("name", annotation)

1023

ann_tag.setAttribute("value", value)

1024

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)

1025

1515

# Add the names to the return values for the

1026

1516

# "org.freedesktop.DBus.Properties" methods

1027

1517

if (if_tag.getAttribute("name")

1046

1536

return xmlstring

1047

1537

1048

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

1049

1610

def datetime_to_dbus(dt, variant_level=0):

1050

1611

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

1051

1612

if dt is None:

1052

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

1053

return dbus.String(dt.isoformat(),

1054

variant_level=variant_level)

1613

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

1614

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

1055

1615

1056

1616

1057

1617

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1059

1619

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

1060

1620

interface names according to the "alt_interface_names" mapping.

1061

1621

Usage:

1062

1622

1063

1623

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

1064

1624

"net.example.AlternateInterface"})

1065

1625

class SampleDBusObject(dbus.service.Object):

1066

1626

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

1067

1627

def SampleDBusMethod():

1068

1628

pass

1069

1629

1070

1630

The above "SampleDBusMethod" on "SampleDBusObject" will be

1071

1631

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

1072

1632

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

1073

1633

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

1074

1634

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

1075

1635

1076

1636

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

1077

1637

(from DBusObjectWithProperties) and interfaces (from the

1078

1638

dbus_interface_annotations decorator).

1079

1639

"""

1640

1080

1641

def wrapper(cls):

1081

1642

for orig_interface_name, alt_interface_name in (

1082

alt_interface_names.iteritems()):

1643

alt_interface_names.items()):

1083

1644

attr = {}

1084

1645

interface_names = set()

1085

1646

# Go though all attributes of the class

1087

1648

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

1088

1649

# with the wrong interface name

1089

1650

if (not hasattr(attribute, "_dbus_interface")

1090

or not attribute._dbus_interface

1091

.startswith(orig_interface_name)):

1651

or not attribute._dbus_interface.startswith(

1652

orig_interface_name)):

1092

1653

continue

1093

1654

# Create an alternate D-Bus interface name based on

1094

1655

# the current name

1095

alt_interface = (attribute._dbus_interface

1096

.replace(orig_interface_name,

1097

alt_interface_name))

1656

alt_interface = attribute._dbus_interface.replace(

1657

orig_interface_name, alt_interface_name)

1098

1658

interface_names.add(alt_interface)

1099

1659

# Is this a D-Bus signal?

1100

1660

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

1101

1661

# Extract the original non-method undecorated

1102

1662

# function by black magic

1103

nonmethod_func = (dict(

1663

if sys.version_info.major == 2:

1664

nonmethod_func = (dict(

1104

1665

zip(attribute.func_code.co_freevars,

1105

attribute.__closure__))["func"]

1106

.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)

1107

1673

# Create a new, but exactly alike, function

1108

1674

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

1109

1675

# with the alternate D-Bus interface name

1110

new_function = (dbus.service.signal

1111

(alt_interface,

1112

attribute._dbus_signature)

1113

(types.FunctionType(

1114

nonmethod_func.func_code,

1115

nonmethod_func.func_globals,

1116

nonmethod_func.func_name,

1117

nonmethod_func.func_defaults,

1118

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))

1119

1680

# Copy annotations, if any

1120

1681

try:

1121

new_function._dbus_annotations = (

1122

dict(attribute._dbus_annotations))

1682

new_function._dbus_annotations = dict(

1683

attribute._dbus_annotations)

1123

1684

except AttributeError:

1124

1685

pass

1686

1125

1687

# Define a creator of a function to call both the

1126

1688

# original and alternate functions, so both the

1127

1689

# original and alternate signals gets sent when

1130

1692

"""This function is a scope container to pass

1131

1693

func1 and func2 to the "call_both" function

1132

1694

outside of its arguments"""

1695

1696

@functools.wraps(func2)

1133

1697

def call_both(*args, **kwargs):

1134

1698

"""This function will emit two D-Bus

1135

1699

signals by calling func1 and func2"""

1136

1700

func1(*args, **kwargs)

1137

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

1138

1708

return call_both

1139

1709

# Create the "call_both" function and add it to

1140

1710

# the class

1145

1715

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

1146

1716

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

1147

1717

# to the class.

1148

attr[attrname] = (dbus.service.method

1149

(alt_interface,

1150

attribute._dbus_in_signature,

1151

attribute._dbus_out_signature)

1152

(types.FunctionType

1153

(attribute.func_code,

1154

attribute.func_globals,

1155

attribute.func_name,

1156

attribute.func_defaults,

1157

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)))

1158

1724

# Copy annotations, if any

1159

1725

try:

1160

attr[attrname]._dbus_annotations = (

1161

dict(attribute._dbus_annotations))

1726

attr[attrname]._dbus_annotations = dict(

1727

attribute._dbus_annotations)

1162

1728

except AttributeError:

1163

1729

pass

1164

1730

# Is this a D-Bus property?

1167

1733

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

1168

1734

# property with the alternate D-Bus interface

1169

1735

# name. Add it to the class.

1170

attr[attrname] = (dbus_service_property

1171

(alt_interface,

1172

attribute._dbus_signature,

1173

attribute._dbus_access,

1174

attribute

1175

._dbus_get_args_options

1176

["byte_arrays"])

1177

(types.FunctionType

1178

(attribute.func_code,

1179

attribute.func_globals,

1180

attribute.func_name,

1181

attribute.func_defaults,

1182

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)))

1183

1742

# Copy annotations, if any

1184

1743

try:

1185

attr[attrname]._dbus_annotations = (

1186

dict(attribute._dbus_annotations))

1744

attr[attrname]._dbus_annotations = dict(

1745

attribute._dbus_annotations)

1187

1746

except AttributeError:

1188

1747

pass

1189

1748

# Is this a D-Bus interface?

1192

1751

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

1193

1752

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

1194

1753

# to the class.

1195

attr[attrname] = (dbus_interface_annotations

1196

(alt_interface)

1197

(types.FunctionType

1198

(attribute.func_code,

1199

attribute.func_globals,

1200

attribute.func_name,

1201

attribute.func_defaults,

1202

attribute.func_closure)))

1754

attr[attrname] = (

1755

dbus_interface_annotations(alt_interface)

1756

(copy_function(attribute)))

1203

1757

if deprecate:

1204

1758

# Deprecate all alternate interfaces

1205

iname="_AlternateDBusNames_interface_annotation{0}"

1759

iname = "_AlternateDBusNames_interface_annotation{}"

1206

1760

for interface_name in interface_names:

1761

1207

1762

@dbus_interface_annotations(interface_name)

1208

1763

def func(self):

1209

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

1210

"true" }

1764

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

1765

"true"}

1211

1766

# Find an unused name

1212

1767

for aname in (iname.format(i)

1213

1768

for i in itertools.count()):

1217

1772

if interface_names:

1218

1773

# Replace the class with a new subclass of it with

1219

1774

# methods, signals, etc. as created above.

1220

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

1221

(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)

1222

1781

return cls

1782

1223

1783

return wrapper

1224

1784

1225

1785

1226

1786

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

1227

"se.bsnet.fukt.Mandos"})

1787

"se.bsnet.fukt.Mandos"})

1228

1788

class ClientDBus(Client, DBusObjectWithProperties):

1229

1789

"""A Client class using D-Bus

1230

1790

1231

1791

Attributes:

1232

1792

dbus_object_path: dbus.ObjectPath

1233

1793

bus: dbus.SystemBus()

1234

1794

"""

1235

1795

1236

1796

runtime_expansions = (Client.runtime_expansions

1237

+ ("dbus_object_path",))

1238

1797

+ ("dbus_object_path", ))

1798

1799

_interface = "se.recompile.Mandos.Client"

1800

1239

1801

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

1240

1241

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

1802

1803

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

1242

1804

self.bus = bus

1243

1805

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

1244

1806

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

1245

1807

# the D-Bus

1246

client_object_name = unicode(self.name).translate(

1808

client_object_name = str(self.name).translate(

1247

1809

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

1248

1810

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

1249

self.dbus_object_path = (dbus.ObjectPath

1250

("/clients/" + client_object_name))

1811

self.dbus_object_path = dbus.ObjectPath(

1812

"/clients/" + client_object_name)

1251

1813

DBusObjectWithProperties.__init__(self, self.bus,

1252

1814

self.dbus_object_path)

1253

1254

def notifychangeproperty(transform_func,

1255

dbus_name, type_func=lambda x: x,

1256

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):

1257

1821

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

1258

1822

its changes to DBus.

1259

1823

1260

1824

transform_fun: Function that takes a value and a variant_level

1261

1825

and transforms it to a D-Bus type.

1262

1826

dbus_name: D-Bus name of the variable

1264

1828

to the D-Bus. Default: no transform

1265

1829

variant_level: D-Bus variant level. Default: 1

1266

1830

"""

1267

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

1831

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

1832

1268

1833

def setter(self, value):

1269

1834

if hasattr(self, "dbus_object_path"):

1270

1835

if (not hasattr(self, attrname) or

1271

1836

type_func(getattr(self, attrname, None))

1272

1837

!= type_func(value)):

1273

dbus_value = transform_func(type_func(value),

1274

variant_level

1275

=variant_level)

1276

self.PropertyChanged(dbus.String(dbus_name),

1277

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())

1278

1853

setattr(self, attrname, value)

1279

1854

1280

1855

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

1281

1856

1282

1857

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1283

1858

approvals_pending = notifychangeproperty(dbus.Boolean,

1284

1859

"ApprovalPending",

1285

type_func = bool)

1860

type_func=bool)

1286

1861

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

1287

1862

last_enabled = notifychangeproperty(datetime_to_dbus,

1288

1863

"LastEnabled")

1289

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

1290

type_func = lambda checker:

1291

checker is not None)

1864

checker = notifychangeproperty(

1865

dbus.Boolean, "CheckerRunning",

1866

type_func=lambda checker: checker is not None)

1292

1867

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1293

1868

"LastCheckedOK")

1294

1869

last_checker_status = notifychangeproperty(dbus.Int16,

1297

1872

datetime_to_dbus, "LastApprovalRequest")

1298

1873

approved_by_default = notifychangeproperty(dbus.Boolean,

1299

1874

"ApprovedByDefault")

1300

approval_delay = notifychangeproperty(dbus.UInt64,

1301

"ApprovalDelay",

1302

type_func =

1303

timedelta_to_milliseconds)

1875

approval_delay = notifychangeproperty(

1876

dbus.UInt64, "ApprovalDelay",

1877

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

1304

1878

approval_duration = notifychangeproperty(

1305

1879

dbus.UInt64, "ApprovalDuration",

1306

type_func = timedelta_to_milliseconds)

1880

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

1307

1881

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

1308

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

1309

type_func =

1310

timedelta_to_milliseconds)

1882

timeout = notifychangeproperty(

1883

dbus.UInt64, "Timeout",

1884

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

1311

1885

extended_timeout = notifychangeproperty(

1312

1886

dbus.UInt64, "ExtendedTimeout",

1313

type_func = timedelta_to_milliseconds)

1314

interval = notifychangeproperty(dbus.UInt64,

1315

"Interval",

1316

type_func =

1317

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)

1318

1891

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

1319

1892

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

1893

invalidate_only=True)

1894

1320

1895

del notifychangeproperty

1321

1896

1322

1897

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

1323

1898

try:

1324

1899

self.remove_from_connection()

1327

1902

if hasattr(DBusObjectWithProperties, "__del__"):

1328

1903

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

1329

1904

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

1330

1331

def checker_callback(self, pid, condition, command,

1332

*args, **kwargs):

1333

self.checker_callback_tag = None

1334

self.checker = None

1335

if os.WIFEXITED(condition):

1336

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:

1337

1913

# Emit D-Bus signal

1338

1914

self.CheckerCompleted(dbus.Int16(exitstatus),

1339

dbus.Int64(condition),

1915

# This is specific to GNU libC

1916

dbus.Int64(exitstatus << 8),

1340

1917

dbus.String(command))

1341

1918

else:

1342

1919

# Emit D-Bus signal

1343

1920

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

1344

dbus.Int64(condition),

1921

dbus.Int64(

1922

# This is specific to GNU libC

1923

(exitstatus << 8)

1924

| self.last_checker_signal),

1345

1925

dbus.String(command))

1346

1347

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

1348

*args, **kwargs)

1349

1926

return ret

1927

1350

1928

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

1351

old_checker = self.checker

1352

if self.checker is not None:

1353

old_checker_pid = self.checker.pid

1354

else:

1355

old_checker_pid = None

1929

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

1356

1930

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

1357

1931

# Only if new checker process was started

1358

1932

if (self.checker is not None

1360

1934

# Emit D-Bus signal

1361

1935

self.CheckerStarted(self.current_checker_command)

1362

1936

return r

1363

1937

1364

1938

def _reset_approved(self):

1365

1939

self.approved = None

1366

1940

return False

1367

1941

1368

1942

def approve(self, value=True):

1369

1943

self.approved = value

1370

gobject.timeout_add(timedelta_to_milliseconds

1371

(self.approval_duration),

1372

self._reset_approved)

1944

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

1945

* 1000), self._reset_approved)

1373

1946

self.send_changedstate()

1374

1375

## D-Bus methods, signals & properties

1376

_interface = "se.recompile.Mandos.Client"

1377

1378

## Interfaces

1379

1380

@dbus_interface_annotations(_interface)

1381

def _foo(self):

1382

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

1383

"false"}

1384

1385

## Signals

1386

1947

1948

# D-Bus methods, signals & properties

1949

1950

# Interfaces

1951

1952

# Signals

1953

1387

1954

# CheckerCompleted - signal

1388

1955

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

1389

1956

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

1390

1957

"D-Bus signal"

1391

1958

pass

1392

1959

1393

1960

# CheckerStarted - signal

1394

1961

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

1395

1962

def CheckerStarted(self, command):

1396

1963

"D-Bus signal"

1397

1964

pass

1398

1965

1399

1966

# PropertyChanged - signal

1967

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

1400

1968

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

1401

1969

def PropertyChanged(self, property, value):

1402

1970

"D-Bus signal"

1403

1971

pass

1404

1972

1405

1973

# GotSecret - signal

1406

1974

@dbus.service.signal(_interface)

1407

1975

def GotSecret(self):

1410

1978

server to mandos-client

1411

1979

"""

1412

1980

pass

1413

1981

1414

1982

# Rejected - signal

1415

1983

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

1416

1984

def Rejected(self, reason):

1417

1985

"D-Bus signal"

1418

1986

pass

1419

1987

1420

1988

# NeedApproval - signal

1421

1989

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

1422

1990

def NeedApproval(self, timeout, default):

1423

1991

"D-Bus signal"

1424

1992

return self.need_approval()

1425

1426

## Methods

1427

1993

1994

# Methods

1995

1428

1996

# Approve - method

1429

1997

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

1430

1998

def Approve(self, value):

1431

1999

self.approve(value)

1432

2000

1433

2001

# CheckedOK - method

1434

2002

@dbus.service.method(_interface)

1435

2003

def CheckedOK(self):

1436

2004

self.checked_ok()

1437

2005

1438

2006

# Enable - method

2007

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

1439

2008

@dbus.service.method(_interface)

1440

2009

def Enable(self):

1441

2010

"D-Bus method"

1442

2011

self.enable()

1443

2012

1444

2013

# StartChecker - method

2014

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

1445

2015

@dbus.service.method(_interface)

1446

2016

def StartChecker(self):

1447

2017

"D-Bus method"

1448

2018

self.start_checker()

1449

2019

1450

2020

# Disable - method

2021

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

1451

2022

@dbus.service.method(_interface)

1452

2023

def Disable(self):

1453

2024

"D-Bus method"

1454

2025

self.disable()

1455

2026

1456

2027

# StopChecker - method

2028

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

1457

2029

@dbus.service.method(_interface)

1458

2030

def StopChecker(self):

1459

2031

self.stop_checker()

1460

1461

## Properties

1462

2032

2033

# Properties

2034

1463

2035

# ApprovalPending - property

1464

2036

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

1465

2037

def ApprovalPending_dbus_property(self):

1466

2038

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

1467

2039

1468

2040

# ApprovedByDefault - property

1469

@dbus_service_property(_interface, signature="b",

2041

@dbus_service_property(_interface,

2042

signature="b",

1470

2043

access="readwrite")

1471

2044

def ApprovedByDefault_dbus_property(self, value=None):

1472

2045

if value is None: # get

1473

2046

return dbus.Boolean(self.approved_by_default)

1474

2047

self.approved_by_default = bool(value)

1475

2048

1476

2049

# ApprovalDelay - property

1477

@dbus_service_property(_interface, signature="t",

2050

@dbus_service_property(_interface,

2051

signature="t",

1478

2052

access="readwrite")

1479

2053

def ApprovalDelay_dbus_property(self, value=None):

1480

2054

if value is None: # get

1481

return dbus.UInt64(self.approval_delay_milliseconds())

2055

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

2056

* 1000)

1482

2057

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

1483

2058

1484

2059

# ApprovalDuration - property

1485

@dbus_service_property(_interface, signature="t",

2060

@dbus_service_property(_interface,

2061

signature="t",

1486

2062

access="readwrite")

1487

2063

def ApprovalDuration_dbus_property(self, value=None):

1488

2064

if value is None: # get

1489

return dbus.UInt64(timedelta_to_milliseconds(

1490

self.approval_duration))

2065

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

2066

* 1000)

1491

2067

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

1492

2068

1493

2069

# Name - property

2070

@dbus_annotations(

2071

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

1494

2072

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

1495

2073

def Name_dbus_property(self):

1496

2074

return dbus.String(self.name)

1497

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

1498

2083

# Fingerprint - property

2084

@dbus_annotations(

2085

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

1499

2086

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

1500

2087

def Fingerprint_dbus_property(self):

1501

2088

return dbus.String(self.fingerprint)

1502

2089

1503

2090

# Host - property

1504

@dbus_service_property(_interface, signature="s",

2091

@dbus_service_property(_interface,

2092

signature="s",

1505

2093

access="readwrite")

1506

2094

def Host_dbus_property(self, value=None):

1507

2095

if value is None: # get

1508

2096

return dbus.String(self.host)

1509

self.host = unicode(value)

1510

2097

self.host = str(value)

2098

1511

2099

# Created - property

2100

@dbus_annotations(

2101

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

1512

2102

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

1513

2103

def Created_dbus_property(self):

1514

2104

return datetime_to_dbus(self.created)

1515

2105

1516

2106

# LastEnabled - property

1517

2107

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

1518

2108

def LastEnabled_dbus_property(self):

1519

2109

return datetime_to_dbus(self.last_enabled)

1520

2110

1521

2111

# Enabled - property

1522

@dbus_service_property(_interface, signature="b",

2112

@dbus_service_property(_interface,

2113

signature="b",

1523

2114

access="readwrite")

1524

2115

def Enabled_dbus_property(self, value=None):

1525

2116

if value is None: # get

1528

2119

self.enable()

1529

2120

else:

1530

2121

self.disable()

1531

2122

1532

2123

# LastCheckedOK - property

1533

@dbus_service_property(_interface, signature="s",

2124

@dbus_service_property(_interface,

2125

signature="s",

1534

2126

access="readwrite")

1535

2127

def LastCheckedOK_dbus_property(self, value=None):

1536

2128

if value is not None:

1537

2129

self.checked_ok()

1538

2130

return

1539

2131

return datetime_to_dbus(self.last_checked_ok)

1540

2132

1541

2133

# LastCheckerStatus - property

1542

@dbus_service_property(_interface, signature="n",

1543

access="read")

2134

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

1544

2135

def LastCheckerStatus_dbus_property(self):

1545

2136

return dbus.Int16(self.last_checker_status)

1546

2137

1547

2138

# Expires - property

1548

2139

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

1549

2140

def Expires_dbus_property(self):

1550

2141

return datetime_to_dbus(self.expires)

1551

2142

1552

2143

# LastApprovalRequest - property

1553

2144

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

1554

2145

def LastApprovalRequest_dbus_property(self):

1555

2146

return datetime_to_dbus(self.last_approval_request)

1556

2147

1557

2148

# Timeout - property

1558

@dbus_service_property(_interface, signature="t",

2149

@dbus_service_property(_interface,

2150

signature="t",

1559

2151

access="readwrite")

1560

2152

def Timeout_dbus_property(self, value=None):

1561

2153

if value is None: # get

1562

return dbus.UInt64(self.timeout_milliseconds())

2154

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

1563

2155

old_timeout = self.timeout

1564

2156

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

1565

2157

# Reschedule disabling

1573

2165

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

1574

2166

is None):

1575

2167

return

1576

gobject.source_remove(self.disable_initiator_tag)

1577

self.disable_initiator_tag = (

1578

gobject.timeout_add(

1579

timedelta_to_milliseconds(self.expires - now),

1580

self.disable))

1581

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

1582

2173

# ExtendedTimeout - property

1583

@dbus_service_property(_interface, signature="t",

2174

@dbus_service_property(_interface,

2175

signature="t",

1584

2176

access="readwrite")

1585

2177

def ExtendedTimeout_dbus_property(self, value=None):

1586

2178

if value is None: # get

1587

return dbus.UInt64(self.extended_timeout_milliseconds())

2179

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

2180

* 1000)

1588

2181

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

1589

2182

1590

2183

# Interval - property

1591

@dbus_service_property(_interface, signature="t",

2184

@dbus_service_property(_interface,

2185

signature="t",

1592

2186

access="readwrite")

1593

2187

def Interval_dbus_property(self, value=None):

1594

2188

if value is None: # get

1595

return dbus.UInt64(self.interval_milliseconds())

2189

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

1596

2190

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

1597

2191

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

1598

2192

return

1599

2193

if self.enabled:

1600

2194

# Reschedule checker run

1601

gobject.source_remove(self.checker_initiator_tag)

1602

self.checker_initiator_tag = (gobject.timeout_add

1603

(value, self.start_checker))

1604

self.start_checker() # Start one now, too

1605

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

1606

2200

# Checker - property

1607

@dbus_service_property(_interface, signature="s",

2201

@dbus_service_property(_interface,

2202

signature="s",

1608

2203

access="readwrite")

1609

2204

def Checker_dbus_property(self, value=None):

1610

2205

if value is None: # get

1611

2206

return dbus.String(self.checker_command)

1612

self.checker_command = unicode(value)

1613

2207

self.checker_command = str(value)

2208

1614

2209

# CheckerRunning - property

1615

@dbus_service_property(_interface, signature="b",

2210

@dbus_service_property(_interface,

2211

signature="b",

1616

2212

access="readwrite")

1617

2213

def CheckerRunning_dbus_property(self, value=None):

1618

2214

if value is None: # get

1621

2217

self.start_checker()

1622

2218

else:

1623

2219

self.stop_checker()

1624

2220

1625

2221

# ObjectPath - property

2222

@dbus_annotations(

2223

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

2224

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

1626

2225

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

1627

2226

def ObjectPath_dbus_property(self):

1628

return self.dbus_object_path # is already a dbus.ObjectPath

1629

2227

return self.dbus_object_path # is already a dbus.ObjectPath

2228

1630

2229

# Secret = property

1631

@dbus_service_property(_interface, signature="ay",

1632

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)

1633

2237

def Secret_dbus_property(self, value):

1634

self.secret = str(value)

1635

2238

self.secret = bytes(value)

2239

1636

2240

del _interface

1637

2241

1638

2242

1639

class ProxyClient(object):

1640

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

2243

class ProxyClient:

2244

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

1641

2245

self._pipe = child_pipe

1642

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

2246

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

1643

2247

if not self._pipe.recv():

1644

raise KeyError()

1645

2248

raise KeyError(key_id or fpr)

2249

1646

2250

def __getattribute__(self, name):

1647

2251

if name == '_pipe':

1648

2252

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

1651

2255

if data[0] == 'data':

1652

2256

return data[1]

1653

2257

if data[0] == 'function':

2258

1654

2259

def func(*args, **kwargs):

1655

2260

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

1656

2261

return self._pipe.recv()[1]

2262

1657

2263

return func

1658

2264

1659

2265

def __setattr__(self, name, value):

1660

2266

if name == '_pipe':

1661

2267

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

1664

2270

1665

2271

class ClientHandler(socketserver.BaseRequestHandler, object):

1666

2272

"""A class to handle client connections.

1667

2273

1668

2274

Instantiated once for each connection to handle it.

1669

2275

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

1670

2276

1671

2277

def handle(self):

1672

2278

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

1673

2279

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

1674

unicode(self.client_address))

2280

str(self.client_address))

1675

2281

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

1676

2282

self.server.child_pipe.fileno())

1677

1678

session = (gnutls.connection

1679

.ClientSession(self.request,

1680

gnutls.connection

1681

.X509Credentials()))

1682

1683

# Note: gnutls.connection.X509Credentials is really a

1684

# generic GnuTLS certificate credentials object so long as

1685

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

1686

# here despite using OpenPGP certificates.

1687

1688

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

1689

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

1690

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

1691

# "+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"))

1692

2290

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

1693

2291

priority = self.server.gnutls_priority

1694

2292

if priority is None:

1695

2293

priority = "NORMAL"

1696

(gnutls.library.functions

1697

.gnutls_priority_set_direct(session._c_object,

1698

priority, None))

1699

2294

gnutls.priority_set_direct(session._c_object,

2295

priority.encode("utf-8"),

2296

None)

2297

1700

2298

# Start communication using the Mandos protocol

1701

2299

# Get protocol number

1702

2300

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

1707

2305

except (ValueError, IndexError, RuntimeError) as error:

1708

2306

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

1709

2307

return

1710

2308

1711

2309

# Start GnuTLS connection

1712

2310

try:

1713

2311

session.handshake()

1714

except gnutls.errors.GNUTLSError as error:

2312

except gnutls.Error as error:

1715

2313

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

1716

2314

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

1717

2315

# established. Just abandon the request.

1718

2316

return

1719

2317

logger.debug("Handshake succeeded")

1720

2318

1721

2319

approval_required = False

1722

2320

try:

1723

try:

1724

fpr = self.fingerprint(self.peer_certificate

1725

(session))

1726

except (TypeError,

1727

gnutls.errors.GNUTLSError) as error:

1728

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

1729

return

1730

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

1731

1732

try:

1733

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,

1734

2343

self.client_address)

1735

2344

except KeyError:

1736

2345

return

1737

2346

1738

2347

if client.approval_delay:

1739

2348

delay = client.approval_delay

1740

2349

client.approvals_pending += 1

1741

2350

approval_required = True

1742

2351

1743

2352

while True:

1744

2353

if not client.enabled:

1745

2354

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

1746

client.name)

2355

client.name)

1747

2356

if self.server.use_dbus:

1748

2357

# Emit D-Bus signal

1749

2358

client.Rejected("Disabled")

1750

2359

return

1751

2360

1752

2361

if client.approved or not client.approval_delay:

1753

#We are approved or approval is disabled

2362

# We are approved or approval is disabled

1754

2363

break

1755

2364

elif client.approved is None:

1756

2365

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

1758

2367

if self.server.use_dbus:

1759

2368

# Emit D-Bus signal

1760

2369

client.NeedApproval(

1761

client.approval_delay_milliseconds(),

1762

client.approved_by_default)

2370

client.approval_delay.total_seconds()

2371

* 1000, client.approved_by_default)

1763

2372

else:

1764

2373

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

1765

2374

client.name)

1767

2376

# Emit D-Bus signal

1768

2377

client.Rejected("Denied")

1769

2378

return

1770

1771

#wait until timeout or approved

2379

2380

# wait until timeout or approved

1772

2381

time = datetime.datetime.now()

1773

2382

client.changedstate.acquire()

1774

client.changedstate.wait(

1775

float(timedelta_to_milliseconds(delay)

1776

/ 1000))

2383

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

1777

2384

client.changedstate.release()

1778

2385

time2 = datetime.datetime.now()

1779

2386

if (time2 - time) >= delay:

1789

2396

break

1790

2397

else:

1791

2398

delay -= time2 - time

1792

1793

sent_size = 0

1794

while sent_size < len(client.secret):

1795

try:

1796

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

1797

except gnutls.errors.GNUTLSError as error:

1798

logger.warning("gnutls send failed",

1799

exc_info=error)

1800

return

1801

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

1802

sent, len(client.secret)

1803

- (sent_size + sent))

1804

sent_size += sent

1805

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

1806

2407

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

1807

2408

# bump the timeout using extended_timeout

1808

2409

client.bump_timeout(client.extended_timeout)

1809

2410

if self.server.use_dbus:

1810

2411

# Emit D-Bus signal

1811

2412

client.GotSecret()

1812

2413

1813

2414

finally:

1814

2415

if approval_required:

1815

2416

client.approvals_pending -= 1

1816

2417

try:

1817

2418

session.bye()

1818

except gnutls.errors.GNUTLSError as error:

2419

except gnutls.Error as error:

1819

2420

logger.warning("GnuTLS bye failed",

1820

2421

exc_info=error)

1821

2422

1822

2423

@staticmethod

1823

2424

def peer_certificate(session):

1824

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

1825

# If not an OpenPGP certificate...

1826

if (gnutls.library.functions

1827

.gnutls_certificate_type_get(session._c_object)

1828

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1829

# ...do the normal thing

1830

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""

1831

2441

list_size = ctypes.c_uint(1)

1832

cert_list = (gnutls.library.functions

1833

.gnutls_certificate_get_peers

2442

cert_list = (gnutls.certificate_get_peers

1834

2443

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

1835

2444

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

1836

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

1837

" certificate")

2445

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

1838

2446

if list_size.value == 0:

1839

2447

return None

1840

2448

cert = cert_list[0]

1841

2449

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

1842

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

1843

2485

@staticmethod

1844

2486

def fingerprint(openpgp):

1845

2487

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1846

2488

# New GnuTLS "datum" with the OpenPGP public key

1847

datum = (gnutls.library.types

1848

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

1849

ctypes.POINTER

1850

(ctypes.c_ubyte)),

1851

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)))

1852

2493

# New empty GnuTLS certificate

1853

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1854

(gnutls.library.functions

1855

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2494

crt = gnutls.openpgp_crt_t()

2495

gnutls.openpgp_crt_init(ctypes.byref(crt))

1856

2496

# Import the OpenPGP public key into the certificate

1857

(gnutls.library.functions

1858

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

1859

gnutls.library.constants

1860

.GNUTLS_OPENPGP_FMT_RAW))

2497

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

2498

gnutls.OPENPGP_FMT_RAW)

1861

2499

# Verify the self signature in the key

1862

2500

crtverify = ctypes.c_uint()

1863

(gnutls.library.functions

1864

.gnutls_openpgp_crt_verify_self(crt, 0,

1865

ctypes.byref(crtverify)))

2501

gnutls.openpgp_crt_verify_self(crt, 0,

2502

ctypes.byref(crtverify))

1866

2503

if crtverify.value != 0:

1867

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1868

raise (gnutls.errors.CertificateSecurityError

1869

("Verify failed"))

2504

gnutls.openpgp_crt_deinit(crt)

2505

raise gnutls.CertificateSecurityError(code

2506

=crtverify.value)

1870

2507

# New buffer for the fingerprint

1871

2508

buf = ctypes.create_string_buffer(20)

1872

2509

buf_len = ctypes.c_size_t()

1873

2510

# Get the fingerprint from the certificate into the buffer

1874

(gnutls.library.functions

1875

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

1876

ctypes.byref(buf_len)))

2511

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

2512

ctypes.byref(buf_len))

1877

2513

# Deinit the certificate

1878

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2514

gnutls.openpgp_crt_deinit(crt)

1879

2515

# Convert the buffer to a Python bytestring

1880

2516

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

1881

2517

# Convert the bytestring to hexadecimal notation

1883

2519

return hex_fpr

1884

2520

1885

2521

1886

class MultiprocessingMixIn(object):

2522

class MultiprocessingMixIn:

1887

2523

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

2524

1888

2525

def sub_process_main(self, request, address):

1889

2526

try:

1890

2527

self.finish_request(request, address)

1891

2528

except Exception:

1892

2529

self.handle_error(request, address)

1893

2530

self.close_request(request)

1894

2531

1895

2532

def process_request(self, request, address):

1896

2533

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

1897

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

1898

args = (request, address))

2534

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

2535

args=(request, address))

1899

2536

proc.start()

1900

2537

return proc

1901

2538

1902

2539

1903

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2540

class MultiprocessingMixInWithPipe(MultiprocessingMixIn):

1904

2541

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

2542

1905

2543

def process_request(self, request, client_address):

1906

2544

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

1907

2545

1908

2546

This function creates a new pipe in self.pipe

1909

2547

"""

1910

2548

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1911

2549

1912

2550

proc = MultiprocessingMixIn.process_request(self, request,

1913

2551

client_address)

1914

2552

self.child_pipe.close()

1915

2553

self.add_pipe(parent_pipe, proc)

1916

2554

1917

2555

def add_pipe(self, parent_pipe, proc):

1918

2556

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

1919

2557

raise NotImplementedError()

1920

2558

1921

2559

1922

2560

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1923

socketserver.TCPServer, object):

2561

socketserver.TCPServer):

1924

2562

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

1925

2563

1926

2564

Attributes:

1927

2565

enabled: Boolean; whether this server is activated yet

1928

2566

interface: None or a network interface name (string)

1929

2567

use_ipv6: Boolean; to use IPv6 or not

1930

2568

"""

2569

1931

2570

def __init__(self, server_address, RequestHandlerClass,

1932

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

2571

interface=None,

2572

use_ipv6=True,

2573

socketfd=None):

1933

2574

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

1934

2575

creating a new one with socket.socket().

1935

2576

"""

1941

2582

self.socketfd = socketfd

1942

2583

# Save the original socket.socket() function

1943

2584

self.socket_socket = socket.socket

2585

1944

2586

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

1945

#

2587

#

1946

2588

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

1947

2589

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

1948

2590

# patching socket.socket.)

1949

#

2591

#

1950

2592

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

1951

2593

@functools.wraps(socket.socket)

1952

2594

def socket_wrapper(*args, **kwargs):

1964

2606

# socket_wrapper(), if socketfd was set.

1965

2607

socketserver.TCPServer.__init__(self, server_address,

1966

2608

RequestHandlerClass)

1967

2609

1968

2610

def server_bind(self):

1969

2611

"""This overrides the normal server_bind() function

1970

2612

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

1971

2613

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

2614

global SO_BINDTODEVICE

1972

2615

if self.interface is not None:

1973

2616

if SO_BINDTODEVICE is None:

1974

logger.error("SO_BINDTODEVICE does not exist;"

1975

" cannot bind to interface %s",

1976

self.interface)

1977

else:

1978

try:

1979

self.socket.setsockopt(socket.SOL_SOCKET,

1980

SO_BINDTODEVICE,

1981

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

1982

except socket.error as error:

1983

if error.errno == errno.EPERM:

1984

logger.error("No permission to bind to"

1985

" interface %s", self.interface)

1986

elif error.errno == errno.ENOPROTOOPT:

1987

logger.error("SO_BINDTODEVICE not available;"

1988

" cannot bind to interface %s",

1989

self.interface)

1990

elif error.errno == errno.ENODEV:

1991

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

1992

" cannot bind", self.interface)

1993

else:

1994

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

1995

2638

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

1996

2639

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

2640

if self.server_address[1]:

2641

self.allow_reuse_address = True

1997

2642

if not self.server_address[0]:

1998

2643

if self.address_family == socket.AF_INET6:

1999

any_address = "::" # in6addr_any

2644

any_address = "::" # in6addr_any

2000

2645

else:

2001

any_address = "0.0.0.0" # INADDR_ANY

2646

any_address = "0.0.0.0" # INADDR_ANY

2002

2647

self.server_address = (any_address,

2003

2648

self.server_address[1])

2004

2649

elif not self.server_address[1]:

2005

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

2006

0)

2650

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

2007

2651

# if self.interface:

2008

2652

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

2009

2653

# 0, # port

2015

2659

2016

2660

class MandosServer(IPv6_TCPServer):

2017

2661

"""Mandos server.

2018

2662

2019

2663

Attributes:

2020

2664

clients: set of Client objects

2021

2665

gnutls_priority GnuTLS priority string

2022

2666

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

2023

2024

Assumes a gobject.MainLoop event loop.

2667

2668

Assumes a GLib.MainLoop event loop.

2025

2669

"""

2670

2026

2671

def __init__(self, server_address, RequestHandlerClass,

2027

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

2028

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):

2029

2678

self.enabled = False

2030

2679

self.clients = clients

2031

2680

if self.clients is None:

2034

2683

self.gnutls_priority = gnutls_priority

2035

2684

IPv6_TCPServer.__init__(self, server_address,

2036

2685

RequestHandlerClass,

2037

interface = interface,

2038

use_ipv6 = use_ipv6,

2039

socketfd = socketfd)

2686

interface=interface,

2687

use_ipv6=use_ipv6,

2688

socketfd=socketfd)

2689

2040

2690

def server_activate(self):

2041

2691

if self.enabled:

2042

2692

return socketserver.TCPServer.server_activate(self)

2043

2693

2044

2694

def enable(self):

2045

2695

self.enabled = True

2046

2696

2047

2697

def add_pipe(self, parent_pipe, proc):

2048

2698

# Call "handle_ipc" for both data and EOF events

2049

gobject.io_add_watch(parent_pipe.fileno(),

2050

gobject.IO_IN | gobject.IO_HUP,

2051

functools.partial(self.handle_ipc,

2052

parent_pipe =

2053

parent_pipe,

2054

proc = proc))

2055

2056

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

2057

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):

2058

2710

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

2059

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

2711

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

2060

2712

# Wait for other process to exit

2061

2713

proc.join()

2062

2714

return False

2063

2715

2064

2716

# Read a request from the child

2065

2717

request = parent_pipe.recv()

2066

2718

command = request[0]

2067

2719

2068

2720

if command == 'init':

2069

fpr = request[1]

2070

address = request[2]

2071

2072

for c in self.clients.itervalues():

2073

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:

2074

2732

client = c

2075

2733

break

2076

2734

else:

2077

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

2078

"dress: %s", fpr, address)

2735

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

2736

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

2079

2737

if self.use_dbus:

2080

2738

# Emit D-Bus signal

2081

mandos_dbus_service.ClientNotFound(fpr,

2739

mandos_dbus_service.ClientNotFound(key_id or fpr,

2082

2740

address[0])

2083

2741

parent_pipe.send(False)

2084

2742

return False

2085

2086

gobject.io_add_watch(parent_pipe.fileno(),

2087

gobject.IO_IN | gobject.IO_HUP,

2088

functools.partial(self.handle_ipc,

2089

parent_pipe =

2090

parent_pipe,

2091

proc = proc,

2092

client_object =

2093

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))

2094

2751

parent_pipe.send(True)

2095

2752

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

2096

2753

# same fileno

2099

2756

funcname = request[1]

2100

2757

args = request[2]

2101

2758

kwargs = request[3]

2102

2759

2103

2760

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

2104

2761

funcname)(*args,

2105

**kwargs)))

2106

2762

**kwargs)))

2763

2107

2764

if command == 'getattr':

2108

2765

attrname = request[1]

2109

if callable(client_object.__getattribute__(attrname)):

2110

parent_pipe.send(('function',))

2766

if isinstance(client_object.__getattribute__(attrname),

2767

collections.abc.Callable):

2768

parent_pipe.send(('function', ))

2111

2769

else:

2112

parent_pipe.send(('data', client_object

2113

.__getattribute__(attrname)))

2114

2770

parent_pipe.send((

2771

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

2772

2115

2773

if command == 'setattr':

2116

2774

attrname = request[1]

2117

2775

value = request[2]

2118

2776

setattr(client_object, attrname, value)

2119

2777

2120

2778

return True

2121

2779

2122

2780

2123

2781

def rfc3339_duration_to_delta(duration):

2124

2782

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

2125

2126

>>> rfc3339_duration_to_delta("P7D")

2127

datetime.timedelta(7)

2128

>>> rfc3339_duration_to_delta("PT60S")

2129

datetime.timedelta(0, 60)

2130

>>> rfc3339_duration_to_delta("PT60M")

2131

datetime.timedelta(0, 3600)

2132

>>> rfc3339_duration_to_delta("PT24H")

2133

datetime.timedelta(1)

2134

>>> rfc3339_duration_to_delta("P1W")

2135

datetime.timedelta(7)

2136

>>> rfc3339_duration_to_delta("PT5M30S")

2137

datetime.timedelta(0, 330)

2138

>>> rfc3339_duration_to_delta("P1DT3M20S")

2139

datetime.timedelta(1, 200)

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

2140

2798

"""

2141

2799

2142

2800

# Parsing an RFC 3339 duration with regular expressions is not

2143

2801

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

2144

2802

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

2145

2803

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

2146

2804

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

2147

2805

# avoid excessive use of external libraries.

2148

2806

2149

2807

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

2150

Token = collections.namedtuple("Token",

2151

("regexp", # To match token; if

2152

# "value" is not None,

2153

# must have a "group"

2154

# containing digits

2155

"value", # datetime.timedelta or

2156

# None

2157

"followers")) # Tokens valid after

2158

# this token

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

2159

2813

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

2160

2814

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

2161

2815

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

2162

2816

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

2163

2817

datetime.timedelta(seconds=1),

2164

frozenset((token_end,)))

2818

frozenset((token_end, )))

2165

2819

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

2166

2820

datetime.timedelta(minutes=1),

2167

2821

frozenset((token_second, token_end)))

2183

2837

frozenset((token_month, token_end)))

2184

2838

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

2185

2839

datetime.timedelta(weeks=1),

2186

frozenset((token_end,)))

2840

frozenset((token_end, )))

2187

2841

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

2188

2842

frozenset((token_year, token_month,

2189

2843

token_day, token_time,

2190

token_week))),

2191

# Define starting values

2192

value = datetime.timedelta() # Value so far

2844

token_week)))

2845

# Define starting values:

2846

# Value so far

2847

value = datetime.timedelta()

2193

2848

found_token = None

2194

followers = frozenset(token_duration,) # Following valid tokens

2195

s = duration # String left to parse

2849

# Following valid tokens

2850

followers = frozenset((token_duration, ))

2851

# String left to parse

2852

s = duration

2196

2853

# Loop until end token is found

2197

2854

while found_token is not token_end:

2198

2855

# Search for any currently valid tokens

2214

2871

break

2215

2872

else:

2216

2873

# No currently valid tokens were found

2217

raise ValueError("Invalid RFC 3339 duration")

2874

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

2875

.format(duration))

2218

2876

# End token found

2219

2877

return value

2220

2878

2221

2879

2222

2880

def string_to_delta(interval):

2223

2881

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

2224

2225

>>> string_to_delta('7d')

2226

datetime.timedelta(7)

2227

>>> string_to_delta('60s')

2228

datetime.timedelta(0, 60)

2229

>>> string_to_delta('60m')

2230

datetime.timedelta(0, 3600)

2231

>>> string_to_delta('24h')

2232

datetime.timedelta(1)

2233

>>> string_to_delta('1w')

2234

datetime.timedelta(7)

2235

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

2236

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

2237

2895

"""

2238

2896

2239

2897

try:

2240

2898

return rfc3339_duration_to_delta(interval)

2241

2899

except ValueError:

2242

2900

pass

2243

2901

2244

2902

timevalue = datetime.timedelta(0)

2245

2903

for s in interval.split():

2246

2904

try:

2247

suffix = unicode(s[-1])

2905

suffix = s[-1]

2248

2906

value = int(s[:-1])

2249

2907

if suffix == "d":

2250

2908

delta = datetime.timedelta(value)

2257

2915

elif suffix == "w":

2258

2916

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

2259

2917

else:

2260

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

2261

.format(suffix))

2918

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

2262

2919

except IndexError as e:

2263

2920

raise ValueError(*(e.args))

2264

2921

timevalue += delta

2265

2922

return timevalue

2266

2923

2267

2924

2268

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

2925

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

2269

2926

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

2270

2927

2271

2928

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

2272

2929

if os.fork():

2273

2930

sys.exit()

2281

2938

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

2282

2939

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

2283

2940

raise OSError(errno.ENODEV,

2284

"{0} not a character device"

2941

"{} not a character device"

2285

2942

.format(os.devnull))

2286

2943

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

2287

2944

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

2291

2948

2292

2949

2293

2950

def main():

2294

2951

2295

2952

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

2296

2953

# Parsing of options, both command line and config file

2297

2954

2298

2955

parser = argparse.ArgumentParser()

2299

2956

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

2300

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

2957

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

2301

2958

help="show version number and exit")

2302

2959

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

2303

2960

help="Bind to interface IF")

2336

2993

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

2337

2994

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

2338

2995

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

2339

2996

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

2997

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

2998

default=None)

2999

2340

3000

options = parser.parse_args()

2341

2342

if options.check:

2343

import doctest

2344

doctest.testmod()

2345

sys.exit()

2346

3001

2347

3002

# Default values for config file for server-global settings

2348

server_defaults = { "interface": "",

2349

"address": "",

2350

"port": "",

2351

"debug": "False",

2352

"priority":

2353

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

2354

"servicename": "Mandos",

2355

"use_dbus": "True",

2356

"use_ipv6": "True",

2357

"debuglevel": "",

2358

"restore": "True",

2359

"socket": "",

2360

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

2361

"foreground": "False",

2362

}

2363

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

2364

3026

# Parse config file for server-global settings

2365

server_config = configparser.SafeConfigParser(server_defaults)

3027

server_config = configparser.ConfigParser(server_defaults)

2366

3028

del server_defaults

2367

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

2368

"mandos.conf"))

2369

# 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

2370

3031

server_settings = server_config.defaults()

2371

3032

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

2372

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

3033

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

3034

"foreground", "zeroconf"):

2373

3035

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

2374

3036

option)

2375

3037

if server_settings["port"]:

2385

3047

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

2386

3048

["socket"])

2387

3049

del server_config

2388

3050

2389

3051

# Override the settings from the config file with command line

2390

3052

# options, if set.

2391

3053

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

2392

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

2393

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

2394

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

3054

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

3055

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

3056

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

2395

3057

value = getattr(options, option)

2396

3058

if value is not None:

2397

3059

server_settings[option] = value

2398

3060

del options

2399

3061

# Force all strings to be unicode

2400

3062

for option in server_settings.keys():

2401

if type(server_settings[option]) is str:

2402

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"))

2403

3066

# Force all boolean options to be boolean

2404

3067

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

2405

"foreground"):

3068

"foreground", "zeroconf"):

2406

3069

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

2407

3070

# Debug implies foreground

2408

3071

if server_settings["debug"]:

2409

3072

server_settings["foreground"] = True

2410

3073

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

2411

3074

2412

3075

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

2413

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

2414

3082

# For convenience

2415

3083

debug = server_settings["debug"]

2416

3084

debuglevel = server_settings["debuglevel"]

2419

3087

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

2420

3088

stored_state_file)

2421

3089

foreground = server_settings["foreground"]

2422

3090

zeroconf = server_settings["zeroconf"]

3091

2423

3092

if debug:

2424

3093

initlogger(debug, logging.DEBUG)

2425

3094

else:

2428

3097

else:

2429

3098

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

2430

3099

initlogger(debug, level)

2431

3100

2432

3101

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

2433

syslogger.setFormatter(logging.Formatter

2434

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

2435

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

2436

.format(server_settings

2437

["servicename"])))

2438

3102

syslogger.setFormatter(

3103

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

3104

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

3105

server_settings["servicename"])))

3106

2439

3107

# Parse config file with clients

2440

client_config = configparser.SafeConfigParser(Client

2441

.client_defaults)

3108

client_config = configparser.ConfigParser(Client.client_defaults)

2442

3109

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

2443

3110

"clients.conf"))

2444

3111

2445

3112

global mandos_dbus_service

2446

3113

mandos_dbus_service = None

2447

2448

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

2449

server_settings["port"]),

2450

ClientHandler,

2451

interface=(server_settings["interface"]

2452

or None),

2453

use_ipv6=use_ipv6,

2454

gnutls_priority=

2455

server_settings["priority"],

2456

use_dbus=use_dbus,

2457

socketfd=(server_settings["socket"]

2458

or None))

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)

2459

3126

if not foreground:

2460

3127

pidfilename = "/run/mandos.pid"

2461

3128

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

2462

3129

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

2463

3130

pidfile = None

2464

3131

try:

2465

pidfile = open(pidfilename, "w")

3132

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

2466

3133

except IOError as e:

2467

3134

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

2468

3135

exc_info=e)

2469

2470

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

3136

3137

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

3138

("mandos", "mandos"),

3139

("nobody", "nogroup")):

2471

3140

try:

2472

3141

uid = pwd.getpwnam(name).pw_uid

2473

gid = pwd.getpwnam(name).pw_gid

3142

gid = pwd.getpwnam(group).pw_gid

2474

3143

break

2475

3144

except KeyError:

2476

3145

continue

2480

3149

try:

2481

3150

os.setgid(gid)

2482

3151

os.setuid(uid)

3152

if debug:

3153

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

3154

gid))

2483

3155

except OSError as error:

3156

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

3157

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

2484

3158

if error.errno != errno.EPERM:

2485

3159

raise

2486

3160

2487

3161

if debug:

2488

3162

# Enable all possible GnuTLS debugging

2489

3163

2490

3164

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

2491

3165

# - GnuTLS manual

2492

gnutls.library.functions.gnutls_global_set_log_level(11)

2493

2494

@gnutls.library.types.gnutls_log_func

3166

gnutls.global_set_log_level(11)

3167

3168

@gnutls.log_func

2495

3169

def debug_gnutls(level, string):

2496

3170

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

2497

2498

(gnutls.library.functions

2499

.gnutls_global_set_log_function(debug_gnutls))

2500

3171

3172

gnutls.global_set_log_function(debug_gnutls)

3173

2501

3174

# Redirect stdin so all checkers get /dev/null

2502

3175

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

2503

3176

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

2504

3177

if null > 2:

2505

3178

os.close(null)

2506

3179

2507

3180

# Need to fork before connecting to D-Bus

2508

3181

if not foreground:

2509

3182

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

2510

3183

daemon()

2511

2512

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

2513

# need to inform gobject that threads will be used.

2514

gobject.threads_init()

2515

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

2516

3190

global main_loop

2517

3191

# From the Avahi example code

2518

3192

DBusGMainLoop(set_as_default=True)

2519

main_loop = gobject.MainLoop()

3193

main_loop = GLib.MainLoop()

2520

3194

bus = dbus.SystemBus()

2521

3195

# End of Avahi example code

2522

3196

if use_dbus:

2523

3197

try:

2524

3198

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

2525

bus, do_not_queue=True)

2526

old_bus_name = (dbus.service.BusName

2527

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

2528

do_not_queue=True))

2529

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:

2530

3205

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

2531

3206

use_dbus = False

2532

3207

server_settings["use_dbus"] = False

2533

3208

tcp_server.use_dbus = False

2534

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2535

service = AvahiServiceToSyslog(name =

2536

server_settings["servicename"],

2537

servicetype = "_mandos._tcp",

2538

protocol = protocol, bus = bus)

2539

if server_settings["interface"]:

2540

service.interface = (if_nametoindex

2541

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

2542

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

2543

3220

global multiprocessing_manager

2544

3221

multiprocessing_manager = multiprocessing.Manager()

2545

3222

2546

3223

client_class = Client

2547

3224

if use_dbus:

2548

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

2549

3225

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

3226

2550

3227

client_settings = Client.config_parser(client_config)

2551

3228

old_client_settings = {}

2552

3229

clients_data = {}

2553

3230

2554

3231

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

2555

3232

global wnull

2556

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

3233

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

2557

3234

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

2558

3235

# mode

2559

3236

if debug or not foreground:

2560

3237

wnull.close()

2561

3238

2562

3239

# Get client data and settings from last running state.

2563

3240

if server_settings["restore"]:

2564

3241

try:

2565

3242

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

2566

clients_data, old_client_settings = (pickle.load

2567

(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"))

2568

3293

os.remove(stored_state_path)

2569

3294

except IOError as e:

2570

3295

if e.errno == errno.ENOENT:

2571

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

2572

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

3296

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

3297

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

2573

3298

else:

2574

3299

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

2575

3300

exc_info=e)

2576

3301

raise

2577

3302

except EOFError as e:

2578

3303

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

2579

"EOFError:", exc_info=e)

2580

3304

"EOFError:",

3305

exc_info=e)

3306

2581

3307

with PGPEngine() as pgp:

2582

for client_name, client in clients_data.iteritems():

3308

for client_name, client in clients_data.items():

2583

3309

# Skip removed clients

2584

3310

if client_name not in client_settings:

2585

3311

continue

2586

3312

2587

3313

# Decide which value to use after restoring saved state.

2588

3314

# We have three different values: Old config file,

2589

3315

# new config file, and saved state.

2594

3320

# For each value in new config, check if it

2595

3321

# differs from the old config value (Except for

2596

3322

# the "secret" attribute)

2597

if (name != "secret" and

2598

value != old_client_settings[client_name]

2599

[name]):

3323

if (name != "secret"

3324

and (value !=

3325

old_client_settings[client_name][name])):

2600

3326

client[name] = value

2601

3327

except KeyError:

2602

3328

pass

2603

3329

2604

3330

# Clients who has passed its expire date can still be

2605

# enabled if its last checker was successful. Clients

3331

# enabled if its last checker was successful. A Client

2606

3332

# whose checker succeeded before we stored its state is

2607

3333

# assumed to have successfully run all checkers during

2608

3334

# downtime.

2610

3336

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

2611

3337

if not client["last_checked_ok"]:

2612

3338

logger.warning(

2613

"disabling client {0} - Client never "

2614

"performed a successful checker"

2615

.format(client_name))

3339

"disabling client {} - Client never "

3340

"performed a successful checker".format(

3341

client_name))

2616

3342

client["enabled"] = False

2617

3343

elif client["last_checker_status"] != 0:

2618

3344

logger.warning(

2619

"disabling client {0} - Client "

2620

"last checker failed with error code {1}"

2621

.format(client_name,

2622

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"]))

2623

3350

client["enabled"] = False

2624

3351

else:

2625

client["expires"] = (datetime.datetime

2626

.utcnow()

2627

+ client["timeout"])

3352

client["expires"] = (

3353

datetime.datetime.utcnow()

3354

+ client["timeout"])

2628

3355

logger.debug("Last checker succeeded,"

2629

" keeping {0} enabled"

2630

.format(client_name))

3356

" keeping {} enabled".format(

3357

client_name))

2631

3358

try:

2632

client["secret"] = (

2633

pgp.decrypt(client["encrypted_secret"],

2634

client_settings[client_name]

2635

["secret"]))

3359

client["secret"] = pgp.decrypt(

3360

client["encrypted_secret"],

3361

client_settings[client_name]["secret"])

2636

3362

except PGPError:

2637

3363

# If decryption fails, we use secret from new settings

2638

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

2639

.format(client_name))

2640

client["secret"] = (

2641

client_settings[client_name]["secret"])

2642

3364

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

3365

client_name))

3366

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

3367

["secret"])

3368

2643

3369

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

2644

3370

for client_name in (set(old_client_settings)

2645

3371

- set(client_settings)):

2647

3373

for client_name in (set(client_settings)

2648

3374

- set(old_client_settings)):

2649

3375

clients_data[client_name] = client_settings[client_name]

2650

3376

2651

3377

# Create all client objects

2652

for client_name, client in clients_data.iteritems():

3378

for client_name, client in clients_data.items():

2653

3379

tcp_server.clients[client_name] = client_class(

2654

name = client_name, settings = client,

2655

server_settings = server_settings)

2656

3380

name=client_name,

3381

settings=client,

3382

server_settings=server_settings)

3383

2657

3384

if not tcp_server.clients:

2658

3385

logger.warning("No clients defined")

2659

3386

2660

3387

if not foreground:

2661

3388

if pidfile is not None:

3389

pid = os.getpid()

2662

3390

try:

2663

3391

with pidfile:

2664

pid = os.getpid()

2665

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

3392

print(pid, file=pidfile)

2666

3393

except IOError:

2667

3394

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

2668

3395

pidfilename, pid)

2669

3396

del pidfile

2670

3397

del pidfilename

2671

2672

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

2673

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

2674

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

2675

3403

if use_dbus:

2676

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

2677

"se.bsnet.fukt.Mandos"})

2678

class MandosDBusService(DBusObjectWithProperties):

3404

3405

@alternate_dbus_interfaces(

3406

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

3407

class MandosDBusService(DBusObjectWithObjectManager):

2679

3408

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

3409

2680

3410

def __init__(self):

2681

3411

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

3412

2682

3413

_interface = "se.recompile.Mandos"

2683

2684

@dbus_interface_annotations(_interface)

2685

def _foo(self):

2686

return { "org.freedesktop.DBus.Property"

2687

".EmitsChangedSignal":

2688

"false"}

2689

3414

2690

3415

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

2691

3416

def ClientAdded(self, objpath):

2692

3417

"D-Bus signal"

2693

3418

pass

2694

3419

2695

3420

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

2696

def ClientNotFound(self, fingerprint, address):

3421

def ClientNotFound(self, key_id, address):

2697

3422

"D-Bus signal"

2698

3423

pass

2699

3424

3425

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

3426

"true"})

2700

3427

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

2701

3428

def ClientRemoved(self, objpath, name):

2702

3429

"D-Bus signal"

2703

3430

pass

2704

3431

3432

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

3433

"true"})

2705

3434

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

2706

3435

def GetAllClients(self):

2707

3436

"D-Bus method"

2708

return dbus.Array(c.dbus_object_path

2709

for c in

2710

tcp_server.clients.itervalues())

2711

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"})

2712

3442

@dbus.service.method(_interface,

2713

3443

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

2714

3444

def GetAllClientsWithProperties(self):

2715

3445

"D-Bus method"

2716

3446

return dbus.Dictionary(

2717

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

2718

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()},

2719

3450

signature="oa{sv}")

2720

3451

2721

3452

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

2722

3453

def RemoveClient(self, object_path):

2723

3454

"D-Bus method"

2724

for c in tcp_server.clients.itervalues():

3455

for c in tcp_server.clients.values():

2725

3456

if c.dbus_object_path == object_path:

2726

3457

del tcp_server.clients[c.name]

2727

3458

c.remove_from_connection()

2728

# Don't signal anything except ClientRemoved

3459

# Don't signal the disabling

2729

3460

c.disable(quiet=True)

2730

# Emit D-Bus signal

2731

self.ClientRemoved(object_path, c.name)

3461

# Emit D-Bus signal for removal

3462

self.client_removed_signal(c)

2732

3463

return

2733

3464

raise KeyError(object_path)

2734

3465

2735

3466

del _interface

2736

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

2737

3504

mandos_dbus_service = MandosDBusService()

2738

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

2739

3511

def cleanup():

2740

3512

"Cleanup function; run on exit"

2741

service.cleanup()

2742

2743

multiprocessing.active_children()

2744

wnull.close()

3513

if zeroconf:

3514

service.cleanup()

3515

3516

mp.active_children()

3517

wn.close()

2745

3518

if not (tcp_server.clients or client_settings):

2746

3519

return

2747

3520

2748

3521

# Store client before exiting. Secrets are encrypted with key

2749

3522

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

2750

3523

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

2751

3524

clients = {}

2752

3525

with PGPEngine() as pgp:

2753

for client in tcp_server.clients.itervalues():

3526

for client in tcp_server.clients.values():

2754

3527

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

2755

3528

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

2756

3529

key)

2757

3530

client_dict = {}

2758

3531

2759

3532

# A list of attributes that can not be pickled

2760

3533

# + secret.

2761

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

2762

"checker", "server_settings"))

2763

for name, typ in (inspect.getmembers

2764

(dbus.service.Object)):

3534

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

3535

"checker", "server_settings"}

3536

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

3537

.Object):

2765

3538

exclude.add(name)

2766

3539

2767

3540

client_dict["encrypted_secret"] = (client

2768

3541

.encrypted_secret)

2769

3542

for attr in client.client_structure:

2770

3543

if attr not in exclude:

2771

3544

client_dict[attr] = getattr(client, attr)

2772

3545

2773

3546

clients[client.name] = client_dict

2774

3547

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

2775

3548

2776

3549

try:

2777

with (tempfile.NamedTemporaryFile

2778

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

2779

dir=os.path.dirname(stored_state_path),

2780

delete=False)) as stored_state:

2781

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

2782

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

2783

3559

os.rename(tempname, stored_state_path)

2784

3560

except (IOError, OSError) as e:

2785

3561

if not debug:

2788

3564

except NameError:

2789

3565

pass

2790

3566

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

2791

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

3567

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

2792

3568

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

2793

3569

else:

2794

3570

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

2795

3571

exc_info=e)

2796

3572

raise

2797

3573

2798

3574

# Delete all clients, and settings from config

2799

3575

while tcp_server.clients:

2800

3576

name, client = tcp_server.clients.popitem()

2801

3577

if use_dbus:

2802

3578

client.remove_from_connection()

2803

# Don't signal anything except ClientRemoved

3579

# Don't signal the disabling

2804

3580

client.disable(quiet=True)

3581

# Emit D-Bus signal for removal

2805

3582

if use_dbus:

2806

# Emit D-Bus signal

2807

mandos_dbus_service.ClientRemoved(client

2808

.dbus_object_path,

2809

client.name)

3583

mandos_dbus_service.client_removed_signal(client)

2810

3584

client_settings.clear()

2811

3585

2812

3586

atexit.register(cleanup)

2813

2814

for client in tcp_server.clients.itervalues():

3587

3588

for client in tcp_server.clients.values():

2815

3589

if use_dbus:

2816

# Emit D-Bus signal

2817

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3590

# Emit D-Bus signal for adding

3591

mandos_dbus_service.client_added_signal(client)

2818

3592

# Need to initiate checking of clients

2819

3593

if client.enabled:

2820

3594

client.init_checker()

2821

3595

2822

3596

tcp_server.enable()

2823

3597

tcp_server.server_activate()

2824

3598

2825

3599

# Find out what port we got

2826

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

3600

if zeroconf:

3601

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

2827

3602

if use_ipv6:

2828

3603

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

2829

3604

" flowinfo %d, scope_id %d",

2831

3606

else: # IPv4

2832

3607

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

2833

3608

*tcp_server.socket.getsockname())

2834

2835

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

2836

3609

3610

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

3611

2837

3612

try:

2838

# From the Avahi example code

2839

try:

2840

service.activate()

2841

except dbus.exceptions.DBusException as error:

2842

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

2843

cleanup()

2844

sys.exit(1)

2845

# End of Avahi example code

2846

2847

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

2848

lambda *args, **kwargs:

2849

(tcp_server.handle_request

2850

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

2851

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

2852

3629

logger.debug("Starting main loop")

2853

3630

main_loop.run()

2854

3631

except AvahiError as error:

2863

3640

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

2864

3641

cleanup()

2865

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

2866

3660

if __name__ == '__main__':

2867

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()