/mandos/trunk : revision 1218

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#!/usr/bin/python

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

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#

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#!/usr/bin/python3 -bI

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

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#

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

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#

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#

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

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# service publisher, downloaded from

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

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

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

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

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#

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#

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# Everything else is

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#

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

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

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#

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# This file is part of Mandos.

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#

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

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

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

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# (at your option) any later version.

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#

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

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

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

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# WITHOUT ANY WARRANTY; without even the implied warranty of

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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

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# GNU General Public License for more details.

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#

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#

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

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# along with this program. If not, see

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

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#

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

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#

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

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#

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#

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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from future_builtins import *

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try:

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from future_builtins import *

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except ImportError:

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pass

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import SocketServer as socketserver

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try:

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import SocketServer as socketserver

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except ImportError:

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import socketserver

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import socket

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import argparse

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import datetime

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import errno

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import gnutls.crypto

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import gnutls.connection

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import gnutls.errors

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import gnutls.library.functions

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import gnutls.library.constants

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import gnutls.library.types

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import ConfigParser as configparser

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try:

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import ConfigParser as configparser

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except ImportError:

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import configparser

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import sys

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import re

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import os

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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 = "1.6.1"

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

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# Try running the C preprocessor:

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try:

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

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"/dev/stdin"],

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE)

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stdout = cc.communicate(

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

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

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except (OSError, ValueError, IndexError):

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# No value found

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SO_BINDTODEVICE = None

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if sys.version_info < (3, 2):

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configparser.Configparser = configparser.SafeConfigParser

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version = "1.8.11"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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

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syslogger = None

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try:

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.if_nametoindex)

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if_nametoindex = ctypes.cdll.LoadLibrary(

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

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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interface))

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

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ifreq[16:20])[0]

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

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

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return interface_index

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def copy_function(func):

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

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if sys.version_info.major == 2:

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return types.FunctionType(func.func_code,

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func.func_globals,

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func.func_name,

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func.func_defaults,

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func.func_closure)

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else:

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return types.FunctionType(func.__code__,

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func.__globals__,

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func.__name__,

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func.__defaults__,

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func.__closure__)

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183

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

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"""init logger and add loglevel"""

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global syslogger

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syslogger = (logging.handlers.SysLogHandler(

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facility=logging.handlers.SysLogHandler.LOG_DAEMON,

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address="/dev/log"))

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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

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pass

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class PGPEngine(object):

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class PGPEngine:

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

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def __init__(self):

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

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self._cleanup()

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return False

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def __del__(self):

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self._cleanup()

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def _cleanup(self):

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if self.tempdir is not None:

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# Delete contents of tempdir

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

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topdown = False):

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topdown=False):

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for filename in files:

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

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for dirname in dirs:

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# Remove tempdir

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os.rmdir(self.tempdir)

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self.tempdir = None

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def password_encode(self, password):

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

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

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

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

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if len(encoded) > 2048:

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

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

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

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

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return encoded

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def encrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(dir=self.tempdir

180

) as passfile:

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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proc = subprocess.Popen(['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)

190

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

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE,

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stderr=subprocess.PIPE)

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

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283

if proc.returncode != 0:

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284

raise PGPError(err)

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return ciphertext

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286

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def decrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(dir = self.tempdir

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) as passfile:

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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291

passfile.write(passphrase)

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passfile.flush()

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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

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= data)

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE,

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stderr=subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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return decrypted_plaintext

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# Pretend that we have an Avahi module

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class avahi:

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"""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

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PROTO_INET = 0 # avahi-common/address.h

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PROTO_INET6 = 1 # avahi-common/address.h

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DBUS_NAME = "org.freedesktop.Avahi"

314

DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"

315

DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

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DBUS_PATH_SERVER = "/"

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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

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ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h

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ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h

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SERVER_INVALID = 0 # avahi-common/defs.h

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SERVER_REGISTERING = 1 # avahi-common/defs.h

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SERVER_RUNNING = 2 # avahi-common/defs.h

328

SERVER_COLLISION = 3 # avahi-common/defs.h

329

SERVER_FAILURE = 4 # avahi-common/defs.h

330

331

215

332

class AvahiError(Exception):

216

333

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

217

334

self.value = value

218

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

219

def __unicode__(self):

220

return unicode(repr(self.value))

335

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

336

**kwargs)

337

221

338

222

339

class AvahiServiceError(AvahiError):

223

340

pass

224

341

342

225

343

class AvahiGroupError(AvahiError):

226

344

pass

227

345

228

346

229

class AvahiService(object):

347

class AvahiService:

230

348

"""An Avahi (Zeroconf) service.

231

349

232

350

Attributes:

233

351

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

234

352

Used to optionally bind to the specified interface.

246

364

server: D-Bus Server

247

365

bus: dbus.SystemBus()

248

366

"""

249

250

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

251

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

252

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

253

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):

254

379

self.interface = interface

255

380

self.name = name

256

381

self.type = servicetype

265

390

self.server = None

266

391

self.bus = bus

267

392

self.entry_group_state_changed_match = None

268

269

def rename(self):

393

394

def rename(self, remove=True):

270

395

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

271

396

if self.rename_count >= self.max_renames:

272

397

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

273

398

" after %i retries, exiting.",

274

399

self.rename_count)

275

400

raise AvahiServiceError("Too many renames")

276

self.name = unicode(self.server

277

.GetAlternativeServiceName(self.name))

401

self.name = str(

402

self.server.GetAlternativeServiceName(self.name))

403

self.rename_count += 1

278

404

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

279

405

self.name)

280

self.remove()

406

if remove:

407

self.remove()

281

408

try:

282

409

self.add()

283

410

except dbus.exceptions.DBusException as error:

284

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

285

self.cleanup()

286

os._exit(1)

287

self.rename_count += 1

288

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

289

420

def remove(self):

290

421

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

291

422

if self.entry_group_state_changed_match is not None:

293

424

self.entry_group_state_changed_match = None

294

425

if self.group is not None:

295

426

self.group.Reset()

296

427

297

428

def add(self):

298

429

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

299

430

self.remove()

316

447

dbus.UInt16(self.port),

317

448

avahi.string_array_to_txt_array(self.TXT))

318

449

self.group.Commit()

319

450

320

451

def entry_group_state_changed(self, state, error):

321

452

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

322

453

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

323

454

324

455

if state == avahi.ENTRY_GROUP_ESTABLISHED:

325

456

logger.debug("Zeroconf service established.")

326

457

elif state == avahi.ENTRY_GROUP_COLLISION:

328

459

self.rename()

329

460

elif state == avahi.ENTRY_GROUP_FAILURE:

330

461

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

331

unicode(error))

332

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

333

.format(error))

334

462

str(error))

463

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

464

335

465

def cleanup(self):

336

466

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

337

467

if self.group is not None:

342

472

pass

343

473

self.group = None

344

474

self.remove()

345

475

346

476

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

347

477

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

348

478

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

349

bad_states = { avahi.SERVER_INVALID:

350

"Zeroconf server invalid",

351

avahi.SERVER_REGISTERING: None,

352

avahi.SERVER_COLLISION:

353

"Zeroconf server name collision",

354

avahi.SERVER_FAILURE:

355

"Zeroconf server failure" }

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

}

356

485

if state in bad_states:

357

486

if bad_states[state] is not None:

358

487

if error is None:

361

490

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

362

491

self.cleanup()

363

492

elif state == avahi.SERVER_RUNNING:

364

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)

365

505

else:

366

506

if error is None:

367

507

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

368

508

else:

369

509

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

370

510

371

511

def activate(self):

372

512

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

373

513

if self.server is None:

377

517

follow_name_owner_changes=True),

378

518

avahi.DBUS_INTERFACE_SERVER)

379

519

self.server.connect_to_signal("StateChanged",

380

self.server_state_changed)

520

self.server_state_changed)

381

521

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

382

522

383

523

384

524

class AvahiServiceToSyslog(AvahiService):

385

def rename(self):

525

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

386

526

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

387

ret = AvahiService.rename(self)

388

syslogger.setFormatter(logging.Formatter

389

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

390

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

391

.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)))

392

531

return ret

393

532

394

533

395

def timedelta_to_milliseconds(td):

396

"Convert a datetime.timedelta() to milliseconds"

397

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

398

+ (td.seconds * 1000)

399

+ (td.microseconds // 1000))

400

401

402

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:

403

847

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

404

848

405

849

Attributes:

406

850

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

407

851

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

408

852

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

409

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

410

to see if the client lives.

411

'None' if no process is running.

412

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

413

857

checker_command: string; External command which is run to check

414

858

if client lives. %() expansions are done at

415

859

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

416

860

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

417

checker_initiator_tag: a gobject event source tag, or None

861

checker_initiator_tag: a GLib event source tag, or None

418

862

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

419

863

client_structure: Object describing what attributes a client has

420

864

and is used for storing the client at exit

421

865

current_checker_command: string; current running checker_command

422

disable_initiator_tag: a gobject event source tag, or None

866

disable_initiator_tag: a GLib event source tag, or None

423

867

enabled: bool()

424

868

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

425

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

426

872

host: string; available for use by the checker command

427

873

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

428

874

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

430

876

last_checker_status: integer between 0 and 255 reflecting exit

431

877

status of last checker. -1 reflects crashed

432

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

433

881

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

434

882

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

435

883

D-Bus identifiers

442

890

disabled, or None

443

891

server_settings: The server_settings dict from main()

444

892

"""

445

893

446

894

runtime_expansions = ("approval_delay", "approval_duration",

447

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

895

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

448

896

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

449

897

"last_approval_request", "last_checked_ok",

450

898

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

451

client_defaults = { "timeout": "PT5M",

452

"extended_timeout": "PT15M",

453

"interval": "PT2M",

454

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

455

"host": "",

456

"approval_delay": "PT0S",

457

"approval_duration": "PT1S",

458

"approved_by_default": "True",

459

"enabled": "True",

460

}

461

462

def timeout_milliseconds(self):

463

"Return the 'timeout' attribute in milliseconds"

464

return timedelta_to_milliseconds(self.timeout)

465

466

def extended_timeout_milliseconds(self):

467

"Return the 'extended_timeout' attribute in milliseconds"

468

return timedelta_to_milliseconds(self.extended_timeout)

469

470

def interval_milliseconds(self):

471

"Return the 'interval' attribute in milliseconds"

472

return timedelta_to_milliseconds(self.interval)

473

474

def approval_delay_milliseconds(self):

475

return timedelta_to_milliseconds(self.approval_delay)

476

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

477

911

@staticmethod

478

912

def config_parser(config):

479

913

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

486

920

for client_name in config.sections():

487

921

section = dict(config.items(client_name))

488

922

client = settings[client_name] = {}

489

923

490

924

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

491

925

# Reformat values from string types to Python types

492

926

client["approved_by_default"] = config.getboolean(

493

927

client_name, "approved_by_default")

494

928

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

495

929

"enabled")

496

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(" ", ""))

497

936

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

498

937

.replace(" ", ""))

499

938

if "secret" in section:

500

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

939

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

940

.encode("utf-8"),

941

"base64")

501

942

elif "secfile" in section:

502

943

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

503

944

(section["secfile"])),

504

945

"rb") as secfile:

505

946

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

506

947

else:

507

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

948

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

508

949

.format(section))

509

950

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

510

951

client["extended_timeout"] = string_to_delta(

518

959

client["last_approval_request"] = None

519

960

client["last_checked_ok"] = None

520

961

client["last_checker_status"] = -2

521

962

522

963

return settings

523

524

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

964

965

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

525

966

self.name = name

526

967

if server_settings is None:

527

968

server_settings = {}

528

969

self.server_settings = server_settings

529

970

# adding all client settings

530

for setting, value in settings.iteritems():

971

for setting, value in settings.items():

531

972

setattr(self, setting, value)

532

973

533

974

if self.enabled:

534

975

if not hasattr(self, "last_enabled"):

535

976

self.last_enabled = datetime.datetime.utcnow()

539

980

else:

540

981

self.last_enabled = None

541

982

self.expires = None

542

983

543

984

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

544

# Uppercase and remove spaces from fingerprint for later

545

# comparison purposes with return value from the fingerprint()

546

# function

985

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

547

986

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

548

987

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

549

988

datetime.datetime.utcnow())

550

989

551

990

# attributes specific for this server instance

552

991

self.checker = None

553

992

self.checker_initiator_tag = None

556

995

self.current_checker_command = None

557

996

self.approved = None

558

997

self.approvals_pending = 0

559

self.changedstate = (multiprocessing_manager

560

.Condition(multiprocessing_manager

561

.Lock()))

562

self.client_structure = [attr for attr in

563

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()

564

1002

if not attr.startswith("_")]

565

1003

self.client_structure.append("client_structure")

566

567

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

568

lambda obj:

569

isinstance(obj,

570

property)):

1004

1005

for name, t in inspect.getmembers(

1006

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

571

1007

if not name.startswith("_"):

572

1008

self.client_structure.append(name)

573

1009

574

1010

# Send notice to process children that client state has changed

575

1011

def send_changedstate(self):

576

1012

with self.changedstate:

577

1013

self.changedstate.notify_all()

578

1014

579

1015

def enable(self):

580

1016

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

581

1017

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

586

1022

self.last_enabled = datetime.datetime.utcnow()

587

1023

self.init_checker()

588

1024

self.send_changedstate()

589

1025

590

1026

def disable(self, quiet=True):

591

1027

"""Disable this client."""

592

1028

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

594

1030

if not quiet:

595

1031

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

596

1032

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

597

gobject.source_remove(self.disable_initiator_tag)

1033

GLib.source_remove(self.disable_initiator_tag)

598

1034

self.disable_initiator_tag = None

599

1035

self.expires = None

600

1036

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

601

gobject.source_remove(self.checker_initiator_tag)

1037

GLib.source_remove(self.checker_initiator_tag)

602

1038

self.checker_initiator_tag = None

603

1039

self.stop_checker()

604

1040

self.enabled = False

605

1041

if not quiet:

606

1042

self.send_changedstate()

607

# 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

608

1044

return False

609

1045

610

1046

def __del__(self):

611

1047

self.disable()

612

1048

613

1049

def init_checker(self):

614

1050

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

615

1051

# and every interval from then on.

616

1052

if self.checker_initiator_tag is not None:

617

gobject.source_remove(self.checker_initiator_tag)

618

self.checker_initiator_tag = (gobject.timeout_add

619

(self.interval_milliseconds(),

620

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)

621

1058

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

622

1059

if self.disable_initiator_tag is not None:

623

gobject.source_remove(self.disable_initiator_tag)

624

self.disable_initiator_tag = (gobject.timeout_add

625

(self.timeout_milliseconds(),

626

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)

627

1063

# Also start a new checker *right now*.

628

1064

self.start_checker()

629

630

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

1065

1066

def checker_callback(self, source, condition, connection,

1067

command):

631

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()

632

1074

self.checker_callback_tag = None

633

1075

self.checker = None

634

if os.WIFEXITED(condition):

635

self.last_checker_status = os.WEXITSTATUS(condition)

1076

1077

if returncode >= 0:

1078

self.last_checker_status = returncode

1079

self.last_checker_signal = None

636

1080

if self.last_checker_status == 0:

637

1081

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

638

1082

vars(self))

639

1083

self.checked_ok()

640

1084

else:

641

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

642

vars(self))

1085

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

643

1086

else:

644

1087

self.last_checker_status = -1

1088

self.last_checker_signal = -returncode

645

1089

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

646

1090

vars(self))

647

1091

return False

1092

648

1093

def checked_ok(self):

649

1094

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

650

1095

self.last_checked_ok = datetime.datetime.utcnow()

651

1096

self.last_checker_status = 0

1097

self.last_checker_signal = None

652

1098

self.bump_timeout()

653

1099

654

1100

def bump_timeout(self, timeout=None):

655

1101

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

656

1102

if timeout is None:

657

1103

timeout = self.timeout

658

1104

if self.disable_initiator_tag is not None:

659

gobject.source_remove(self.disable_initiator_tag)

1105

GLib.source_remove(self.disable_initiator_tag)

660

1106

self.disable_initiator_tag = None

661

1107

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

662

self.disable_initiator_tag = (gobject.timeout_add

663

(timedelta_to_milliseconds

664

(timeout), self.disable))

1108

self.disable_initiator_tag = GLib.timeout_add(

1109

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

665

1110

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

666

1111

667

1112

def need_approval(self):

668

1113

self.last_approval_request = datetime.datetime.utcnow()

669

1114

670

1115

def start_checker(self):

671

1116

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

672

1117

673

1118

If a checker already exists, leave it running and do

674

1119

nothing."""

675

1120

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

680

1125

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

681

1126

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

682

1127

# should be.

683

684

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

685

try:

686

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

687

except (AttributeError, OSError) as error:

688

if (isinstance(error, OSError)

689

and error.errno != errno.ECHILD):

690

raise error

691

else:

692

if pid:

693

logger.warning("Checker was a zombie")

694

gobject.source_remove(self.checker_callback_tag)

695

self.checker_callback(pid, status,

696

self.current_checker_command)

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

697

1133

# Start a new checker if needed

698

1134

if self.checker is None:

699

1135

# Escape attributes for the shell

700

escaped_attrs = dict(

701

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

702

for attr in

703

self.runtime_expansions)

1136

escaped_attrs = {

1137

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

1138

for attr in self.runtime_expansions}

704

1139

try:

705

1140

command = self.checker_command % escaped_attrs

706

1141

except TypeError as error:

707

1142

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

708

self.checker_command, exc_info=error)

709

return True # Try again later

1143

self.checker_command,

1144

exc_info=error)

1145

return True # Try again later

710

1146

self.current_checker_command = command

711

try:

712

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

713

command, self.name)

714

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

715

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

716

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

717

# always replaced by /dev/null.)

718

# The exception is when not debugging but nevertheless

719

# running in the foreground; use the previously

720

# created wnull.

721

popen_args = {}

722

if (not self.server_settings["debug"]

723

and self.server_settings["foreground"]):

724

popen_args.update({"stdout": wnull,

725

"stderr": wnull })

726

self.checker = subprocess.Popen(command,

727

close_fds=True,

728

shell=True, cwd="/",

729

**popen_args)

730

except OSError as error:

731

logger.error("Failed to start subprocess",

732

exc_info=error)

733

return True

734

self.checker_callback_tag = (gobject.child_watch_add

735

(self.checker.pid,

736

self.checker_callback,

737

data=command))

738

# The checker may have completed before the gobject

739

# watch was added. Check for this.

740

try:

741

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

742

except OSError as error:

743

if error.errno == errno.ECHILD:

744

# This should never happen

745

logger.error("Child process vanished",

746

exc_info=error)

747

return True

748

raise

749

if pid:

750

gobject.source_remove(self.checker_callback_tag)

751

self.checker_callback(pid, status, command)

752

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

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

753

1174

return True

754

1175

755

1176

def stop_checker(self):

756

1177

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

757

1178

if self.checker_callback_tag:

758

gobject.source_remove(self.checker_callback_tag)

1179

GLib.source_remove(self.checker_callback_tag)

759

1180

self.checker_callback_tag = None

760

1181

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

761

1182

return

762

1183

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

763

try:

764

self.checker.terminate()

765

#time.sleep(0.5)

766

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

767

# self.checker.kill()

768

except OSError as error:

769

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

770

raise

1184

self.checker.terminate()

771

1185

self.checker = None

772

1186

773

1187

774

def dbus_service_property(dbus_interface, signature="v",

775

access="readwrite", byte_arrays=False):

1188

def dbus_service_property(dbus_interface,

1189

signature="v",

1190

access="readwrite",

1191

byte_arrays=False):

776

1192

"""Decorators for marking methods of a DBusObjectWithProperties to

777

1193

become properties on the D-Bus.

778

1194

779

1195

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

780

1196

and with one argument by "Set".

781

1197

782

1198

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

783

1199

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

784

1200

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

787

1203

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

788

1204

if byte_arrays and signature != "ay":

789

1205

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

790

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

1206

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

1207

791

1208

def decorator(func):

792

1209

func._dbus_is_property = True

793

1210

func._dbus_interface = dbus_interface

796

1213

func._dbus_name = func.__name__

797

1214

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

798

1215

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

799

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1216

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

800

1217

return func

1218

801

1219

return decorator

802

1220

803

1221

804

1222

def dbus_interface_annotations(dbus_interface):

805

1223

"""Decorator for marking functions returning interface annotations

806

1224

807

1225

Usage:

808

1226

809

1227

@dbus_interface_annotations("org.example.Interface")

810

1228

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

811

1229

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

812

1230

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

813

1231

"false"}

814

1232

"""

1233

815

1234

def decorator(func):

816

1235

func._dbus_is_interface = True

817

1236

func._dbus_interface = dbus_interface

818

1237

func._dbus_name = dbus_interface

819

1238

return func

1239

820

1240

return decorator

821

1241

822

1242

823

1243

def dbus_annotations(annotations):

824

1244

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

825

1245

Usage:

826

1246

1247

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

1248

"org.freedesktop.DBus.Property."

1249

"EmitsChangedSignal": "false"})

827

1250

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

828

1251

access="r")

829

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

830

"org.freedesktop.DBus.Property."

831

"EmitsChangedSignal": "false"})

832

1252

def Property_dbus_property(self):

833

1253

return dbus.Boolean(False)

1254

1255

See also the DBusObjectWithAnnotations class.

834

1256

"""

1257

835

1258

def decorator(func):

836

1259

func._dbus_annotations = annotations

837

1260

return func

1261

838

1262

return decorator

839

1263

840

1264

841

1265

class DBusPropertyException(dbus.exceptions.DBusException):

842

1266

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

843

1267

"""

844

def __unicode__(self):

845

return unicode(str(self))

1268

pass

846

1269

847

1270

848

1271

class DBusPropertyAccessException(DBusPropertyException):

857

1280

pass

858

1281

859

1282

860

class DBusObjectWithProperties(dbus.service.Object):

861

"""A D-Bus object with properties.

862

863

Classes inheriting from this can use the dbus_service_property

864

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

865

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

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.

866

1288

"""

867

1289

868

1290

@staticmethod

869

1291

def _is_dbus_thing(thing):

870

1292

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

871

1293

872

1294

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

873

1295

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

874

1296

"""

875

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

1297

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

876

1298

False)

877

1299

878

1300

def _get_all_dbus_things(self, thing):

879

1301

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

880

1302

"""

881

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

882

name),

1303

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

883

1304

athing.__get__(self))

884

1305

for cls in self.__class__.__mro__

885

1306

for name, athing in

886

inspect.getmembers(cls,

887

self._is_dbus_thing(thing)))

888

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

889

1380

def _get_dbus_property(self, interface_name, property_name):

890

1381

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

891

1382

property with the specified name and interface.

892

1383

"""

893

for cls in self.__class__.__mro__:

894

for name, value in (inspect.getmembers

895

(cls,

896

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")):

897

1387

if (value._dbus_name == property_name

898

1388

and value._dbus_interface == interface_name):

899

1389

return value.__get__(self)

900

1390

901

1391

# No such property

902

raise DBusPropertyNotFound(self.dbus_object_path + ":"

903

+ interface_name + "."

904

+ property_name)

905

906

@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",

907

1406

out_signature="v")

908

1407

def Get(self, interface_name, property_name):

909

1408

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

915

1414

if not hasattr(value, "variant_level"):

916

1415

return value

917

1416

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

918

1417

919

1418

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

920

1419

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

921

1420

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

927

1426

# The byte_arrays option is not supported yet on

928

1427

# signatures other than "ay".

929

1428

if prop._dbus_signature != "ay":

930

raise ValueError

931

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

932

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))

933

1433

prop(value)

934

935

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

1434

1435

@dbus.service.method(dbus.PROPERTIES_IFACE,

1436

in_signature="s",

936

1437

out_signature="a{sv}")

937

1438

def GetAll(self, interface_name):

938

1439

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

939

1440

standard.

940

1441

941

1442

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

942

1443

"""

943

1444

properties = {}

953

1454

if not hasattr(value, "variant_level"):

954

1455

properties[name] = value

955

1456

continue

956

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

957

value.variant_level+1)

1457

properties[name] = type(value)(

1458

value, variant_level=value.variant_level + 1)

958

1459

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

959

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

960

1469

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

961

1470

out_signature="s",

962

1471

path_keyword='object_path',

963

1472

connection_keyword='connection')

964

1473

def Introspect(self, object_path, connection):

965

1474

"""Overloading of standard D-Bus method.

966

1475

967

1476

Inserts property tags and interface annotation tags.

968

1477

"""

969

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

970

connection)

1478

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1479

object_path,

1480

connection)

971

1481

try:

972

1482

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

1483

973

1484

def make_tag(document, name, prop):

974

1485

e = document.createElement("property")

975

1486

e.setAttribute("name", name)

976

1487

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

977

1488

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

978

1489

return e

1490

979

1491

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

980

1492

# Add property tags

981

1493

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

984

1496

if prop._dbus_interface

985

1497

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

986

1498

if_tag.appendChild(tag)

987

# Add annotation tags

988

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

989

for tag in if_tag.getElementsByTagName(typ):

990

annots = dict()

991

for name, prop in (self.

992

_get_all_dbus_things(typ)):

993

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

994

and prop._dbus_interface

995

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

996

annots.update(getattr

997

(prop,

998

"_dbus_annotations",

999

{}))

1000

for name, value in annots.iteritems():

1001

ann_tag = document.createElement(

1002

"annotation")

1003

ann_tag.setAttribute("name", name)

1004

ann_tag.setAttribute("value", value)

1005

tag.appendChild(ann_tag)

1006

# Add interface annotation tags

1007

for annotation, value in dict(

1008

itertools.chain.from_iterable(

1009

annotations().iteritems()

1010

for name, annotations in

1011

self._get_all_dbus_things("interface")

1012

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

1013

)).iteritems():

1014

ann_tag = document.createElement("annotation")

1015

ann_tag.setAttribute("name", annotation)

1016

ann_tag.setAttribute("value", value)

1017

if_tag.appendChild(ann_tag)

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)

1018

1515

# Add the names to the return values for the

1019

1516

# "org.freedesktop.DBus.Properties" methods

1020

1517

if (if_tag.getAttribute("name")

1039

1536

return xmlstring

1040

1537

1041

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

1042

1610

def datetime_to_dbus(dt, variant_level=0):

1043

1611

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

1044

1612

if dt is None:

1045

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

1046

return dbus.String(dt.isoformat(),

1047

variant_level=variant_level)

1613

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

1614

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

1048

1615

1049

1616

1050

1617

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1052

1619

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

1053

1620

interface names according to the "alt_interface_names" mapping.

1054

1621

Usage:

1055

1622

1056

1623

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

1057

1624

"net.example.AlternateInterface"})

1058

1625

class SampleDBusObject(dbus.service.Object):

1059

1626

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

1060

1627

def SampleDBusMethod():

1061

1628

pass

1062

1629

1063

1630

The above "SampleDBusMethod" on "SampleDBusObject" will be

1064

1631

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

1065

1632

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

1066

1633

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

1067

1634

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

1068

1635

1069

1636

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

1070

1637

(from DBusObjectWithProperties) and interfaces (from the

1071

1638

dbus_interface_annotations decorator).

1072

1639

"""

1640

1073

1641

def wrapper(cls):

1074

1642

for orig_interface_name, alt_interface_name in (

1075

alt_interface_names.iteritems()):

1643

alt_interface_names.items()):

1076

1644

attr = {}

1077

1645

interface_names = set()

1078

1646

# Go though all attributes of the class

1080

1648

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

1081

1649

# with the wrong interface name

1082

1650

if (not hasattr(attribute, "_dbus_interface")

1083

or not attribute._dbus_interface

1084

.startswith(orig_interface_name)):

1651

or not attribute._dbus_interface.startswith(

1652

orig_interface_name)):

1085

1653

continue

1086

1654

# Create an alternate D-Bus interface name based on

1087

1655

# the current name

1088

alt_interface = (attribute._dbus_interface

1089

.replace(orig_interface_name,

1090

alt_interface_name))

1656

alt_interface = attribute._dbus_interface.replace(

1657

orig_interface_name, alt_interface_name)

1091

1658

interface_names.add(alt_interface)

1092

1659

# Is this a D-Bus signal?

1093

1660

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

1094

1661

# Extract the original non-method undecorated

1095

1662

# function by black magic

1096

nonmethod_func = (dict(

1663

if sys.version_info.major == 2:

1664

nonmethod_func = (dict(

1097

1665

zip(attribute.func_code.co_freevars,

1098

attribute.__closure__))["func"]

1099

.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)

1100

1673

# Create a new, but exactly alike, function

1101

1674

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

1102

1675

# with the alternate D-Bus interface name

1103

new_function = (dbus.service.signal

1104

(alt_interface,

1105

attribute._dbus_signature)

1106

(types.FunctionType(

1107

nonmethod_func.func_code,

1108

nonmethod_func.func_globals,

1109

nonmethod_func.func_name,

1110

nonmethod_func.func_defaults,

1111

nonmethod_func.func_closure)))

1676

new_function = copy_function(nonmethod_func)

1677

new_function = (dbus.service.signal(

1678

alt_interface,

1679

attribute._dbus_signature)(new_function))

1112

1680

# Copy annotations, if any

1113

1681

try:

1114

new_function._dbus_annotations = (

1115

dict(attribute._dbus_annotations))

1682

new_function._dbus_annotations = dict(

1683

attribute._dbus_annotations)

1116

1684

except AttributeError:

1117

1685

pass

1686

1118

1687

# Define a creator of a function to call both the

1119

1688

# original and alternate functions, so both the

1120

1689

# original and alternate signals gets sent when

1123

1692

"""This function is a scope container to pass

1124

1693

func1 and func2 to the "call_both" function

1125

1694

outside of its arguments"""

1695

1696

@functools.wraps(func2)

1126

1697

def call_both(*args, **kwargs):

1127

1698

"""This function will emit two D-Bus

1128

1699

signals by calling func1 and func2"""

1129

1700

func1(*args, **kwargs)

1130

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

1131

1708

return call_both

1132

1709

# Create the "call_both" function and add it to

1133

1710

# the class

1138

1715

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

1139

1716

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

1140

1717

# to the class.

1141

attr[attrname] = (dbus.service.method

1142

(alt_interface,

1143

attribute._dbus_in_signature,

1144

attribute._dbus_out_signature)

1145

(types.FunctionType

1146

(attribute.func_code,

1147

attribute.func_globals,

1148

attribute.func_name,

1149

attribute.func_defaults,

1150

attribute.func_closure)))

1718

attr[attrname] = (

1719

dbus.service.method(

1720

alt_interface,

1721

attribute._dbus_in_signature,

1722

attribute._dbus_out_signature)

1723

(copy_function(attribute)))

1151

1724

# Copy annotations, if any

1152

1725

try:

1153

attr[attrname]._dbus_annotations = (

1154

dict(attribute._dbus_annotations))

1726

attr[attrname]._dbus_annotations = dict(

1727

attribute._dbus_annotations)

1155

1728

except AttributeError:

1156

1729

pass

1157

1730

# Is this a D-Bus property?

1160

1733

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

1161

1734

# property with the alternate D-Bus interface

1162

1735

# name. Add it to the class.

1163

attr[attrname] = (dbus_service_property

1164

(alt_interface,

1165

attribute._dbus_signature,

1166

attribute._dbus_access,

1167

attribute

1168

._dbus_get_args_options

1169

["byte_arrays"])

1170

(types.FunctionType

1171

(attribute.func_code,

1172

attribute.func_globals,

1173

attribute.func_name,

1174

attribute.func_defaults,

1175

attribute.func_closure)))

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)))

1176

1742

# Copy annotations, if any

1177

1743

try:

1178

attr[attrname]._dbus_annotations = (

1179

dict(attribute._dbus_annotations))

1744

attr[attrname]._dbus_annotations = dict(

1745

attribute._dbus_annotations)

1180

1746

except AttributeError:

1181

1747

pass

1182

1748

# Is this a D-Bus interface?

1185

1751

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

1186

1752

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

1187

1753

# to the class.

1188

attr[attrname] = (dbus_interface_annotations

1189

(alt_interface)

1190

(types.FunctionType

1191

(attribute.func_code,

1192

attribute.func_globals,

1193

attribute.func_name,

1194

attribute.func_defaults,

1195

attribute.func_closure)))

1754

attr[attrname] = (

1755

dbus_interface_annotations(alt_interface)

1756

(copy_function(attribute)))

1196

1757

if deprecate:

1197

1758

# Deprecate all alternate interfaces

1198

iname="_AlternateDBusNames_interface_annotation{0}"

1759

iname = "_AlternateDBusNames_interface_annotation{}"

1199

1760

for interface_name in interface_names:

1761

1200

1762

@dbus_interface_annotations(interface_name)

1201

1763

def func(self):

1202

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

1203

"true" }

1764

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

1765

"true"}

1204

1766

# Find an unused name

1205

1767

for aname in (iname.format(i)

1206

1768

for i in itertools.count()):

1210

1772

if interface_names:

1211

1773

# Replace the class with a new subclass of it with

1212

1774

# methods, signals, etc. as created above.

1213

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

1214

(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)

1215

1781

return cls

1782

1216

1783

return wrapper

1217

1784

1218

1785

1219

1786

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

1220

"se.bsnet.fukt.Mandos"})

1787

"se.bsnet.fukt.Mandos"})

1221

1788

class ClientDBus(Client, DBusObjectWithProperties):

1222

1789

"""A Client class using D-Bus

1223

1790

1224

1791

Attributes:

1225

1792

dbus_object_path: dbus.ObjectPath

1226

1793

bus: dbus.SystemBus()

1227

1794

"""

1228

1795

1229

1796

runtime_expansions = (Client.runtime_expansions

1230

+ ("dbus_object_path",))

1231

1797

+ ("dbus_object_path", ))

1798

1799

_interface = "se.recompile.Mandos.Client"

1800

1232

1801

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

1233

1234

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

1802

1803

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

1235

1804

self.bus = bus

1236

1805

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

1237

1806

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

1238

1807

# the D-Bus

1239

client_object_name = unicode(self.name).translate(

1808

client_object_name = str(self.name).translate(

1240

1809

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

1241

1810

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

1242

self.dbus_object_path = (dbus.ObjectPath

1243

("/clients/" + client_object_name))

1811

self.dbus_object_path = dbus.ObjectPath(

1812

"/clients/" + client_object_name)

1244

1813

DBusObjectWithProperties.__init__(self, self.bus,

1245

1814

self.dbus_object_path)

1246

1247

def notifychangeproperty(transform_func,

1248

dbus_name, type_func=lambda x: x,

1249

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):

1250

1821

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

1251

1822

its changes to DBus.

1252

1823

1253

1824

transform_fun: Function that takes a value and a variant_level

1254

1825

and transforms it to a D-Bus type.

1255

1826

dbus_name: D-Bus name of the variable

1257

1828

to the D-Bus. Default: no transform

1258

1829

variant_level: D-Bus variant level. Default: 1

1259

1830

"""

1260

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

1831

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

1832

1261

1833

def setter(self, value):

1262

1834

if hasattr(self, "dbus_object_path"):

1263

1835

if (not hasattr(self, attrname) or

1264

1836

type_func(getattr(self, attrname, None))

1265

1837

!= type_func(value)):

1266

dbus_value = transform_func(type_func(value),

1267

variant_level

1268

=variant_level)

1269

self.PropertyChanged(dbus.String(dbus_name),

1270

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())

1271

1853

setattr(self, attrname, value)

1272

1854

1273

1855

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

1274

1856

1275

1857

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1276

1858

approvals_pending = notifychangeproperty(dbus.Boolean,

1277

1859

"ApprovalPending",

1278

type_func = bool)

1860

type_func=bool)

1279

1861

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

1280

1862

last_enabled = notifychangeproperty(datetime_to_dbus,

1281

1863

"LastEnabled")

1282

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

1283

type_func = lambda checker:

1284

checker is not None)

1864

checker = notifychangeproperty(

1865

dbus.Boolean, "CheckerRunning",

1866

type_func=lambda checker: checker is not None)

1285

1867

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1286

1868

"LastCheckedOK")

1287

1869

last_checker_status = notifychangeproperty(dbus.Int16,

1290

1872

datetime_to_dbus, "LastApprovalRequest")

1291

1873

approved_by_default = notifychangeproperty(dbus.Boolean,

1292

1874

"ApprovedByDefault")

1293

approval_delay = notifychangeproperty(dbus.UInt64,

1294

"ApprovalDelay",

1295

type_func =

1296

timedelta_to_milliseconds)

1875

approval_delay = notifychangeproperty(

1876

dbus.UInt64, "ApprovalDelay",

1877

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

1297

1878

approval_duration = notifychangeproperty(

1298

1879

dbus.UInt64, "ApprovalDuration",

1299

type_func = timedelta_to_milliseconds)

1880

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

1300

1881

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

1301

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

1302

type_func =

1303

timedelta_to_milliseconds)

1882

timeout = notifychangeproperty(

1883

dbus.UInt64, "Timeout",

1884

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

1304

1885

extended_timeout = notifychangeproperty(

1305

1886

dbus.UInt64, "ExtendedTimeout",

1306

type_func = timedelta_to_milliseconds)

1307

interval = notifychangeproperty(dbus.UInt64,

1308

"Interval",

1309

type_func =

1310

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)

1311

1891

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

1312

1892

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

1893

invalidate_only=True)

1894

1313

1895

del notifychangeproperty

1314

1896

1315

1897

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

1316

1898

try:

1317

1899

self.remove_from_connection()

1320

1902

if hasattr(DBusObjectWithProperties, "__del__"):

1321

1903

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

1322

1904

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

1323

1324

def checker_callback(self, pid, condition, command,

1325

*args, **kwargs):

1326

self.checker_callback_tag = None

1327

self.checker = None

1328

if os.WIFEXITED(condition):

1329

exitstatus = os.WEXITSTATUS(condition)

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:

1330

1913

# Emit D-Bus signal

1331

1914

self.CheckerCompleted(dbus.Int16(exitstatus),

1332

dbus.Int64(condition),

1915

# This is specific to GNU libC

1916

dbus.Int64(exitstatus << 8),

1333

1917

dbus.String(command))

1334

1918

else:

1335

1919

# Emit D-Bus signal

1336

1920

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

1337

dbus.Int64(condition),

1921

dbus.Int64(

1922

# This is specific to GNU libC

1923

(exitstatus << 8)

1924

| self.last_checker_signal),

1338

1925

dbus.String(command))

1339

1340

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

1341

*args, **kwargs)

1342

1926

return ret

1927

1343

1928

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

1344

old_checker = self.checker

1345

if self.checker is not None:

1346

old_checker_pid = self.checker.pid

1347

else:

1348

old_checker_pid = None

1929

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

1349

1930

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

1350

1931

# Only if new checker process was started

1351

1932

if (self.checker is not None

1353

1934

# Emit D-Bus signal

1354

1935

self.CheckerStarted(self.current_checker_command)

1355

1936

return r

1356

1937

1357

1938

def _reset_approved(self):

1358

1939

self.approved = None

1359

1940

return False

1360

1941

1361

1942

def approve(self, value=True):

1362

1943

self.approved = value

1363

gobject.timeout_add(timedelta_to_milliseconds

1364

(self.approval_duration),

1365

self._reset_approved)

1944

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

1945

* 1000), self._reset_approved)

1366

1946

self.send_changedstate()

1367

1368

## D-Bus methods, signals & properties

1369

_interface = "se.recompile.Mandos.Client"

1370

1371

## Interfaces

1372

1373

@dbus_interface_annotations(_interface)

1374

def _foo(self):

1375

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

1376

"false"}

1377

1378

## Signals

1379

1947

1948

# D-Bus methods, signals & properties

1949

1950

# Interfaces

1951

1952

# Signals

1953

1380

1954

# CheckerCompleted - signal

1381

1955

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

1382

1956

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

1383

1957

"D-Bus signal"

1384

1958

pass

1385

1959

1386

1960

# CheckerStarted - signal

1387

1961

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

1388

1962

def CheckerStarted(self, command):

1389

1963

"D-Bus signal"

1390

1964

pass

1391

1965

1392

1966

# PropertyChanged - signal

1967

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

1393

1968

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

1394

1969

def PropertyChanged(self, property, value):

1395

1970

"D-Bus signal"

1396

1971

pass

1397

1972

1398

1973

# GotSecret - signal

1399

1974

@dbus.service.signal(_interface)

1400

1975

def GotSecret(self):

1403

1978

server to mandos-client

1404

1979

"""

1405

1980

pass

1406

1981

1407

1982

# Rejected - signal

1408

1983

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

1409

1984

def Rejected(self, reason):

1410

1985

"D-Bus signal"

1411

1986

pass

1412

1987

1413

1988

# NeedApproval - signal

1414

1989

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

1415

1990

def NeedApproval(self, timeout, default):

1416

1991

"D-Bus signal"

1417

1992

return self.need_approval()

1418

1419

## Methods

1420

1993

1994

# Methods

1995

1421

1996

# Approve - method

1422

1997

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

1423

1998

def Approve(self, value):

1424

1999

self.approve(value)

1425

2000

1426

2001

# CheckedOK - method

1427

2002

@dbus.service.method(_interface)

1428

2003

def CheckedOK(self):

1429

2004

self.checked_ok()

1430

2005

1431

2006

# Enable - method

2007

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

1432

2008

@dbus.service.method(_interface)

1433

2009

def Enable(self):

1434

2010

"D-Bus method"

1435

2011

self.enable()

1436

2012

1437

2013

# StartChecker - method

2014

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

1438

2015

@dbus.service.method(_interface)

1439

2016

def StartChecker(self):

1440

2017

"D-Bus method"

1441

2018

self.start_checker()

1442

2019

1443

2020

# Disable - method

2021

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

1444

2022

@dbus.service.method(_interface)

1445

2023

def Disable(self):

1446

2024

"D-Bus method"

1447

2025

self.disable()

1448

2026

1449

2027

# StopChecker - method

2028

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

1450

2029

@dbus.service.method(_interface)

1451

2030

def StopChecker(self):

1452

2031

self.stop_checker()

1453

1454

## Properties

1455

2032

2033

# Properties

2034

1456

2035

# ApprovalPending - property

1457

2036

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

1458

2037

def ApprovalPending_dbus_property(self):

1459

2038

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

1460

2039

1461

2040

# ApprovedByDefault - property

1462

@dbus_service_property(_interface, signature="b",

2041

@dbus_service_property(_interface,

2042

signature="b",

1463

2043

access="readwrite")

1464

2044

def ApprovedByDefault_dbus_property(self, value=None):

1465

2045

if value is None: # get

1466

2046

return dbus.Boolean(self.approved_by_default)

1467

2047

self.approved_by_default = bool(value)

1468

2048

1469

2049

# ApprovalDelay - property

1470

@dbus_service_property(_interface, signature="t",

2050

@dbus_service_property(_interface,

2051

signature="t",

1471

2052

access="readwrite")

1472

2053

def ApprovalDelay_dbus_property(self, value=None):

1473

2054

if value is None: # get

1474

return dbus.UInt64(self.approval_delay_milliseconds())

2055

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

2056

* 1000)

1475

2057

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

1476

2058

1477

2059

# ApprovalDuration - property

1478

@dbus_service_property(_interface, signature="t",

2060

@dbus_service_property(_interface,

2061

signature="t",

1479

2062

access="readwrite")

1480

2063

def ApprovalDuration_dbus_property(self, value=None):

1481

2064

if value is None: # get

1482

return dbus.UInt64(timedelta_to_milliseconds(

1483

self.approval_duration))

2065

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

2066

* 1000)

1484

2067

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

1485

2068

1486

2069

# Name - property

2070

@dbus_annotations(

2071

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

1487

2072

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

1488

2073

def Name_dbus_property(self):

1489

2074

return dbus.String(self.name)

1490

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

1491

2083

# Fingerprint - property

2084

@dbus_annotations(

2085

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

1492

2086

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

1493

2087

def Fingerprint_dbus_property(self):

1494

2088

return dbus.String(self.fingerprint)

1495

2089

1496

2090

# Host - property

1497

@dbus_service_property(_interface, signature="s",

2091

@dbus_service_property(_interface,

2092

signature="s",

1498

2093

access="readwrite")

1499

2094

def Host_dbus_property(self, value=None):

1500

2095

if value is None: # get

1501

2096

return dbus.String(self.host)

1502

self.host = unicode(value)

1503

2097

self.host = str(value)

2098

1504

2099

# Created - property

2100

@dbus_annotations(

2101

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

1505

2102

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

1506

2103

def Created_dbus_property(self):

1507

2104

return datetime_to_dbus(self.created)

1508

2105

1509

2106

# LastEnabled - property

1510

2107

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

1511

2108

def LastEnabled_dbus_property(self):

1512

2109

return datetime_to_dbus(self.last_enabled)

1513

2110

1514

2111

# Enabled - property

1515

@dbus_service_property(_interface, signature="b",

2112

@dbus_service_property(_interface,

2113

signature="b",

1516

2114

access="readwrite")

1517

2115

def Enabled_dbus_property(self, value=None):

1518

2116

if value is None: # get

1521

2119

self.enable()

1522

2120

else:

1523

2121

self.disable()

1524

2122

1525

2123

# LastCheckedOK - property

1526

@dbus_service_property(_interface, signature="s",

2124

@dbus_service_property(_interface,

2125

signature="s",

1527

2126

access="readwrite")

1528

2127

def LastCheckedOK_dbus_property(self, value=None):

1529

2128

if value is not None:

1530

2129

self.checked_ok()

1531

2130

return

1532

2131

return datetime_to_dbus(self.last_checked_ok)

1533

2132

1534

2133

# LastCheckerStatus - property

1535

@dbus_service_property(_interface, signature="n",

1536

access="read")

2134

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

1537

2135

def LastCheckerStatus_dbus_property(self):

1538

2136

return dbus.Int16(self.last_checker_status)

1539

2137

1540

2138

# Expires - property

1541

2139

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

1542

2140

def Expires_dbus_property(self):

1543

2141

return datetime_to_dbus(self.expires)

1544

2142

1545

2143

# LastApprovalRequest - property

1546

2144

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

1547

2145

def LastApprovalRequest_dbus_property(self):

1548

2146

return datetime_to_dbus(self.last_approval_request)

1549

2147

1550

2148

# Timeout - property

1551

@dbus_service_property(_interface, signature="t",

2149

@dbus_service_property(_interface,

2150

signature="t",

1552

2151

access="readwrite")

1553

2152

def Timeout_dbus_property(self, value=None):

1554

2153

if value is None: # get

1555

return dbus.UInt64(self.timeout_milliseconds())

2154

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

1556

2155

old_timeout = self.timeout

1557

2156

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

1558

2157

# Reschedule disabling

1566

2165

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

1567

2166

is None):

1568

2167

return

1569

gobject.source_remove(self.disable_initiator_tag)

1570

self.disable_initiator_tag = (

1571

gobject.timeout_add(

1572

timedelta_to_milliseconds(self.expires - now),

1573

self.disable))

1574

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

1575

2173

# ExtendedTimeout - property

1576

@dbus_service_property(_interface, signature="t",

2174

@dbus_service_property(_interface,

2175

signature="t",

1577

2176

access="readwrite")

1578

2177

def ExtendedTimeout_dbus_property(self, value=None):

1579

2178

if value is None: # get

1580

return dbus.UInt64(self.extended_timeout_milliseconds())

2179

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

2180

* 1000)

1581

2181

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

1582

2182

1583

2183

# Interval - property

1584

@dbus_service_property(_interface, signature="t",

2184

@dbus_service_property(_interface,

2185

signature="t",

1585

2186

access="readwrite")

1586

2187

def Interval_dbus_property(self, value=None):

1587

2188

if value is None: # get

1588

return dbus.UInt64(self.interval_milliseconds())

2189

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

1589

2190

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

1590

2191

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

1591

2192

return

1592

2193

if self.enabled:

1593

2194

# Reschedule checker run

1594

gobject.source_remove(self.checker_initiator_tag)

1595

self.checker_initiator_tag = (gobject.timeout_add

1596

(value, self.start_checker))

1597

self.start_checker() # Start one now, too

1598

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

1599

2200

# Checker - property

1600

@dbus_service_property(_interface, signature="s",

2201

@dbus_service_property(_interface,

2202

signature="s",

1601

2203

access="readwrite")

1602

2204

def Checker_dbus_property(self, value=None):

1603

2205

if value is None: # get

1604

2206

return dbus.String(self.checker_command)

1605

self.checker_command = unicode(value)

1606

2207

self.checker_command = str(value)

2208

1607

2209

# CheckerRunning - property

1608

@dbus_service_property(_interface, signature="b",

2210

@dbus_service_property(_interface,

2211

signature="b",

1609

2212

access="readwrite")

1610

2213

def CheckerRunning_dbus_property(self, value=None):

1611

2214

if value is None: # get

1614

2217

self.start_checker()

1615

2218

else:

1616

2219

self.stop_checker()

1617

2220

1618

2221

# ObjectPath - property

2222

@dbus_annotations(

2223

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

2224

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

1619

2225

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

1620

2226

def ObjectPath_dbus_property(self):

1621

return self.dbus_object_path # is already a dbus.ObjectPath

1622

2227

return self.dbus_object_path # is already a dbus.ObjectPath

2228

1623

2229

# Secret = property

1624

@dbus_service_property(_interface, signature="ay",

1625

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)

1626

2237

def Secret_dbus_property(self, value):

1627

self.secret = str(value)

1628

2238

self.secret = bytes(value)

2239

1629

2240

del _interface

1630

2241

1631

2242

1632

class ProxyClient(object):

1633

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

2243

class ProxyClient:

2244

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

1634

2245

self._pipe = child_pipe

1635

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

2246

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

1636

2247

if not self._pipe.recv():

1637

raise KeyError()

1638

2248

raise KeyError(key_id or fpr)

2249

1639

2250

def __getattribute__(self, name):

1640

2251

if name == '_pipe':

1641

2252

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

1644

2255

if data[0] == 'data':

1645

2256

return data[1]

1646

2257

if data[0] == 'function':

2258

1647

2259

def func(*args, **kwargs):

1648

2260

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

1649

2261

return self._pipe.recv()[1]

2262

1650

2263

return func

1651

2264

1652

2265

def __setattr__(self, name, value):

1653

2266

if name == '_pipe':

1654

2267

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

1657

2270

1658

2271

class ClientHandler(socketserver.BaseRequestHandler, object):

1659

2272

"""A class to handle client connections.

1660

2273

1661

2274

Instantiated once for each connection to handle it.

1662

2275

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

1663

2276

1664

2277

def handle(self):

1665

2278

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

1666

2279

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

1667

unicode(self.client_address))

2280

str(self.client_address))

1668

2281

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

1669

2282

self.server.child_pipe.fileno())

1670

1671

session = (gnutls.connection

1672

.ClientSession(self.request,

1673

gnutls.connection

1674

.X509Credentials()))

1675

1676

# Note: gnutls.connection.X509Credentials is really a

1677

# generic GnuTLS certificate credentials object so long as

1678

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

1679

# here despite using OpenPGP certificates.

1680

1681

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

1682

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

1683

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

1684

# "+DHE-DSS"))

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"))

1685

2290

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

1686

2291

priority = self.server.gnutls_priority

1687

2292

if priority is None:

1688

2293

priority = "NORMAL"

1689

(gnutls.library.functions

1690

.gnutls_priority_set_direct(session._c_object,

1691

priority, None))

1692

2294

gnutls.priority_set_direct(session._c_object,

2295

priority.encode("utf-8"),

2296

None)

2297

1693

2298

# Start communication using the Mandos protocol

1694

2299

# Get protocol number

1695

2300

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

1696

2301

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

1697

2302

try:

1698

2303

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

1699

raise RuntimeError

2304

raise RuntimeError(line)

1700

2305

except (ValueError, IndexError, RuntimeError) as error:

1701

2306

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

1702

2307

return

1703

2308

1704

2309

# Start GnuTLS connection

1705

2310

try:

1706

2311

session.handshake()

1707

except gnutls.errors.GNUTLSError as error:

2312

except gnutls.Error as error:

1708

2313

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

1709

2314

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

1710

2315

# established. Just abandon the request.

1711

2316

return

1712

2317

logger.debug("Handshake succeeded")

1713

2318

1714

2319

approval_required = False

1715

2320

try:

1716

try:

1717

fpr = self.fingerprint(self.peer_certificate

1718

(session))

1719

except (TypeError,

1720

gnutls.errors.GNUTLSError) as error:

1721

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

1722

return

1723

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

1724

1725

try:

1726

client = ProxyClient(child_pipe, fpr,

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,

1727

2343

self.client_address)

1728

2344

except KeyError:

1729

2345

return

1730

2346

1731

2347

if client.approval_delay:

1732

2348

delay = client.approval_delay

1733

2349

client.approvals_pending += 1

1734

2350

approval_required = True

1735

2351

1736

2352

while True:

1737

2353

if not client.enabled:

1738

2354

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

1739

client.name)

2355

client.name)

1740

2356

if self.server.use_dbus:

1741

2357

# Emit D-Bus signal

1742

2358

client.Rejected("Disabled")

1743

2359

return

1744

2360

1745

2361

if client.approved or not client.approval_delay:

1746

#We are approved or approval is disabled

2362

# We are approved or approval is disabled

1747

2363

break

1748

2364

elif client.approved is None:

1749

2365

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

1751

2367

if self.server.use_dbus:

1752

2368

# Emit D-Bus signal

1753

2369

client.NeedApproval(

1754

client.approval_delay_milliseconds(),

1755

client.approved_by_default)

2370

client.approval_delay.total_seconds()

2371

* 1000, client.approved_by_default)

1756

2372

else:

1757

2373

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

1758

2374

client.name)

1760

2376

# Emit D-Bus signal

1761

2377

client.Rejected("Denied")

1762

2378

return

1763

1764

#wait until timeout or approved

2379

2380

# wait until timeout or approved

1765

2381

time = datetime.datetime.now()

1766

2382

client.changedstate.acquire()

1767

client.changedstate.wait(

1768

float(timedelta_to_milliseconds(delay)

1769

/ 1000))

2383

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

1770

2384

client.changedstate.release()

1771

2385

time2 = datetime.datetime.now()

1772

2386

if (time2 - time) >= delay:

1782

2396

break

1783

2397

else:

1784

2398

delay -= time2 - time

1785

1786

sent_size = 0

1787

while sent_size < len(client.secret):

1788

try:

1789

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

1790

except gnutls.errors.GNUTLSError as error:

1791

logger.warning("gnutls send failed",

1792

exc_info=error)

1793

return

1794

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

1795

sent, len(client.secret)

1796

- (sent_size + sent))

1797

sent_size += sent

1798

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

1799

2407

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

1800

2408

# bump the timeout using extended_timeout

1801

2409

client.bump_timeout(client.extended_timeout)

1802

2410

if self.server.use_dbus:

1803

2411

# Emit D-Bus signal

1804

2412

client.GotSecret()

1805

2413

1806

2414

finally:

1807

2415

if approval_required:

1808

2416

client.approvals_pending -= 1

1809

2417

try:

1810

2418

session.bye()

1811

except gnutls.errors.GNUTLSError as error:

2419

except gnutls.Error as error:

1812

2420

logger.warning("GnuTLS bye failed",

1813

2421

exc_info=error)

1814

2422

1815

2423

@staticmethod

1816

2424

def peer_certificate(session):

1817

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

1818

# If not an OpenPGP certificate...

1819

if (gnutls.library.functions

1820

.gnutls_certificate_type_get(session._c_object)

1821

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1822

# ...do the normal thing

1823

return session.peer_certificate

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""

1824

2441

list_size = ctypes.c_uint(1)

1825

cert_list = (gnutls.library.functions

1826

.gnutls_certificate_get_peers

2442

cert_list = (gnutls.certificate_get_peers

1827

2443

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

1828

2444

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

1829

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

1830

" certificate")

2445

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

1831

2446

if list_size.value == 0:

1832

2447

return None

1833

2448

cert = cert_list[0]

1834

2449

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

1835

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

1836

2485

@staticmethod

1837

2486

def fingerprint(openpgp):

1838

2487

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1839

2488

# New GnuTLS "datum" with the OpenPGP public key

1840

datum = (gnutls.library.types

1841

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

1842

ctypes.POINTER

1843

(ctypes.c_ubyte)),

1844

ctypes.c_uint(len(openpgp))))

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)))

1845

2493

# New empty GnuTLS certificate

1846

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1847

(gnutls.library.functions

1848

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2494

crt = gnutls.openpgp_crt_t()

2495

gnutls.openpgp_crt_init(ctypes.byref(crt))

1849

2496

# Import the OpenPGP public key into the certificate

1850

(gnutls.library.functions

1851

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

1852

gnutls.library.constants

1853

.GNUTLS_OPENPGP_FMT_RAW))

2497

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

2498

gnutls.OPENPGP_FMT_RAW)

1854

2499

# Verify the self signature in the key

1855

2500

crtverify = ctypes.c_uint()

1856

(gnutls.library.functions

1857

.gnutls_openpgp_crt_verify_self(crt, 0,

1858

ctypes.byref(crtverify)))

2501

gnutls.openpgp_crt_verify_self(crt, 0,

2502

ctypes.byref(crtverify))

1859

2503

if crtverify.value != 0:

1860

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1861

raise (gnutls.errors.CertificateSecurityError

1862

("Verify failed"))

2504

gnutls.openpgp_crt_deinit(crt)

2505

raise gnutls.CertificateSecurityError(code

2506

=crtverify.value)

1863

2507

# New buffer for the fingerprint

1864

2508

buf = ctypes.create_string_buffer(20)

1865

2509

buf_len = ctypes.c_size_t()

1866

2510

# Get the fingerprint from the certificate into the buffer

1867

(gnutls.library.functions

1868

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

1869

ctypes.byref(buf_len)))

2511

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

2512

ctypes.byref(buf_len))

1870

2513

# Deinit the certificate

1871

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2514

gnutls.openpgp_crt_deinit(crt)

1872

2515

# Convert the buffer to a Python bytestring

1873

2516

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

1874

2517

# Convert the bytestring to hexadecimal notation

1876

2519

return hex_fpr

1877

2520

1878

2521

1879

class MultiprocessingMixIn(object):

2522

class MultiprocessingMixIn:

1880

2523

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

2524

1881

2525

def sub_process_main(self, request, address):

1882

2526

try:

1883

2527

self.finish_request(request, address)

1884

2528

except Exception:

1885

2529

self.handle_error(request, address)

1886

2530

self.close_request(request)

1887

2531

1888

2532

def process_request(self, request, address):

1889

2533

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

1890

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

1891

args = (request, address))

2534

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

2535

args=(request, address))

1892

2536

proc.start()

1893

2537

return proc

1894

2538

1895

2539

1896

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2540

class MultiprocessingMixInWithPipe(MultiprocessingMixIn):

1897

2541

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

2542

1898

2543

def process_request(self, request, client_address):

1899

2544

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

1900

2545

1901

2546

This function creates a new pipe in self.pipe

1902

2547

"""

1903

2548

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1904

2549

1905

2550

proc = MultiprocessingMixIn.process_request(self, request,

1906

2551

client_address)

1907

2552

self.child_pipe.close()

1908

2553

self.add_pipe(parent_pipe, proc)

1909

2554

1910

2555

def add_pipe(self, parent_pipe, proc):

1911

2556

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

1912

raise NotImplementedError

2557

raise NotImplementedError()

1913

2558

1914

2559

1915

2560

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1916

socketserver.TCPServer, object):

2561

socketserver.TCPServer):

1917

2562

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

1918

2563

1919

2564

Attributes:

1920

2565

enabled: Boolean; whether this server is activated yet

1921

2566

interface: None or a network interface name (string)

1922

2567

use_ipv6: Boolean; to use IPv6 or not

1923

2568

"""

2569

1924

2570

def __init__(self, server_address, RequestHandlerClass,

1925

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

2571

interface=None,

2572

use_ipv6=True,

2573

socketfd=None):

1926

2574

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

1927

2575

creating a new one with socket.socket().

1928

2576

"""

1934

2582

self.socketfd = socketfd

1935

2583

# Save the original socket.socket() function

1936

2584

self.socket_socket = socket.socket

2585

1937

2586

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

1938

#

2587

#

1939

2588

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

1940

2589

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

1941

2590

# patching socket.socket.)

1942

#

2591

#

1943

2592

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

1944

2593

@functools.wraps(socket.socket)

1945

2594

def socket_wrapper(*args, **kwargs):

1957

2606

# socket_wrapper(), if socketfd was set.

1958

2607

socketserver.TCPServer.__init__(self, server_address,

1959

2608

RequestHandlerClass)

1960

2609

1961

2610

def server_bind(self):

1962

2611

"""This overrides the normal server_bind() function

1963

2612

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

1964

2613

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

2614

global SO_BINDTODEVICE

1965

2615

if self.interface is not None:

1966

2616

if SO_BINDTODEVICE is None:

1967

logger.error("SO_BINDTODEVICE does not exist;"

1968

" cannot bind to interface %s",

1969

self.interface)

1970

else:

1971

try:

1972

self.socket.setsockopt(socket.SOL_SOCKET,

1973

SO_BINDTODEVICE,

1974

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

1975

except socket.error as error:

1976

if error.errno == errno.EPERM:

1977

logger.error("No permission to bind to"

1978

" interface %s", self.interface)

1979

elif error.errno == errno.ENOPROTOOPT:

1980

logger.error("SO_BINDTODEVICE not available;"

1981

" cannot bind to interface %s",

1982

self.interface)

1983

elif error.errno == errno.ENODEV:

1984

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

1985

" cannot bind", self.interface)

1986

else:

1987

raise

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

1988

2638

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

1989

2639

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

2640

if self.server_address[1]:

2641

self.allow_reuse_address = True

1990

2642

if not self.server_address[0]:

1991

2643

if self.address_family == socket.AF_INET6:

1992

any_address = "::" # in6addr_any

2644

any_address = "::" # in6addr_any

1993

2645

else:

1994

any_address = "0.0.0.0" # INADDR_ANY

2646

any_address = "0.0.0.0" # INADDR_ANY

1995

2647

self.server_address = (any_address,

1996

2648

self.server_address[1])

1997

2649

elif not self.server_address[1]:

1998

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

1999

0)

2650

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

2000

2651

# if self.interface:

2001

2652

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

2002

2653

# 0, # port

2008

2659

2009

2660

class MandosServer(IPv6_TCPServer):

2010

2661

"""Mandos server.

2011

2662

2012

2663

Attributes:

2013

2664

clients: set of Client objects

2014

2665

gnutls_priority GnuTLS priority string

2015

2666

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

2016

2017

Assumes a gobject.MainLoop event loop.

2667

2668

Assumes a GLib.MainLoop event loop.

2018

2669

"""

2670

2019

2671

def __init__(self, server_address, RequestHandlerClass,

2020

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

2021

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):

2022

2678

self.enabled = False

2023

2679

self.clients = clients

2024

2680

if self.clients is None:

2027

2683

self.gnutls_priority = gnutls_priority

2028

2684

IPv6_TCPServer.__init__(self, server_address,

2029

2685

RequestHandlerClass,

2030

interface = interface,

2031

use_ipv6 = use_ipv6,

2032

socketfd = socketfd)

2686

interface=interface,

2687

use_ipv6=use_ipv6,

2688

socketfd=socketfd)

2689

2033

2690

def server_activate(self):

2034

2691

if self.enabled:

2035

2692

return socketserver.TCPServer.server_activate(self)

2036

2693

2037

2694

def enable(self):

2038

2695

self.enabled = True

2039

2696

2040

2697

def add_pipe(self, parent_pipe, proc):

2041

2698

# Call "handle_ipc" for both data and EOF events

2042

gobject.io_add_watch(parent_pipe.fileno(),

2043

gobject.IO_IN | gobject.IO_HUP,

2044

functools.partial(self.handle_ipc,

2045

parent_pipe =

2046

parent_pipe,

2047

proc = proc))

2048

2049

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

2050

proc = None, client_object=None):

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):

2051

2710

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

2052

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

2711

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

2053

2712

# Wait for other process to exit

2054

2713

proc.join()

2055

2714

return False

2056

2715

2057

2716

# Read a request from the child

2058

2717

request = parent_pipe.recv()

2059

2718

command = request[0]

2060

2719

2061

2720

if command == 'init':

2062

fpr = request[1]

2063

address = request[2]

2064

2065

for c in self.clients.itervalues():

2066

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:

2067

2732

client = c

2068

2733

break

2069

2734

else:

2070

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

2071

"dress: %s", fpr, address)

2735

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

2736

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

2072

2737

if self.use_dbus:

2073

2738

# Emit D-Bus signal

2074

mandos_dbus_service.ClientNotFound(fpr,

2739

mandos_dbus_service.ClientNotFound(key_id or fpr,

2075

2740

address[0])

2076

2741

parent_pipe.send(False)

2077

2742

return False

2078

2079

gobject.io_add_watch(parent_pipe.fileno(),

2080

gobject.IO_IN | gobject.IO_HUP,

2081

functools.partial(self.handle_ipc,

2082

parent_pipe =

2083

parent_pipe,

2084

proc = proc,

2085

client_object =

2086

client))

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))

2087

2751

parent_pipe.send(True)

2088

2752

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

2089

2753

# same fileno

2092

2756

funcname = request[1]

2093

2757

args = request[2]

2094

2758

kwargs = request[3]

2095

2759

2096

2760

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

2097

2761

funcname)(*args,

2098

**kwargs)))

2099

2762

**kwargs)))

2763

2100

2764

if command == 'getattr':

2101

2765

attrname = request[1]

2102

if callable(client_object.__getattribute__(attrname)):

2103

parent_pipe.send(('function',))

2766

if isinstance(client_object.__getattribute__(attrname),

2767

collections.abc.Callable):

2768

parent_pipe.send(('function', ))

2104

2769

else:

2105

parent_pipe.send(('data', client_object

2106

.__getattribute__(attrname)))

2107

2770

parent_pipe.send((

2771

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

2772

2108

2773

if command == 'setattr':

2109

2774

attrname = request[1]

2110

2775

value = request[2]

2111

2776

setattr(client_object, attrname, value)

2112

2777

2113

2778

return True

2114

2779

2115

2780

2116

2781

def rfc3339_duration_to_delta(duration):

2117

2782

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

2118

2119

>>> rfc3339_duration_to_delta("P7D")

2120

datetime.timedelta(7)

2121

>>> rfc3339_duration_to_delta("PT60S")

2122

datetime.timedelta(0, 60)

2123

>>> rfc3339_duration_to_delta("PT60M")

2124

datetime.timedelta(0, 3600)

2125

>>> rfc3339_duration_to_delta("PT24H")

2126

datetime.timedelta(1)

2127

>>> rfc3339_duration_to_delta("P1W")

2128

datetime.timedelta(7)

2129

>>> rfc3339_duration_to_delta("PT5M30S")

2130

datetime.timedelta(0, 330)

2131

>>> rfc3339_duration_to_delta("P1DT3M20S")

2132

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

2133

2798

"""

2134

2799

2135

2800

# Parsing an RFC 3339 duration with regular expressions is not

2136

2801

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

2137

2802

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

2138

2803

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

2139

2804

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

2140

2805

# avoid excessive use of external libraries.

2141

2806

2142

2807

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

2143

Token = collections.namedtuple("Token",

2144

("regexp", # To match token; if

2145

# "value" is not None,

2146

# must have a "group"

2147

# containing digits

2148

"value", # datetime.timedelta or

2149

# None

2150

"followers")) # Tokens valid after

2151

# this token

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

2152

2813

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

2153

2814

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

2154

2815

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

2155

2816

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

2156

2817

datetime.timedelta(seconds=1),

2157

frozenset((token_end,)))

2818

frozenset((token_end, )))

2158

2819

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

2159

2820

datetime.timedelta(minutes=1),

2160

2821

frozenset((token_second, token_end)))

2176

2837

frozenset((token_month, token_end)))

2177

2838

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

2178

2839

datetime.timedelta(weeks=1),

2179

frozenset((token_end,)))

2840

frozenset((token_end, )))

2180

2841

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

2181

2842

frozenset((token_year, token_month,

2182

2843

token_day, token_time,

2183

token_week))),

2184

# Define starting values

2185

value = datetime.timedelta() # Value so far

2844

token_week)))

2845

# Define starting values:

2846

# Value so far

2847

value = datetime.timedelta()

2186

2848

found_token = None

2187

followers = frozenset(token_duration,) # Following valid tokens

2188

s = duration # String left to parse

2849

# Following valid tokens

2850

followers = frozenset((token_duration, ))

2851

# String left to parse

2852

s = duration

2189

2853

# Loop until end token is found

2190

2854

while found_token is not token_end:

2191

2855

# Search for any currently valid tokens

2207

2871

break

2208

2872

else:

2209

2873

# No currently valid tokens were found

2210

raise ValueError("Invalid RFC 3339 duration")

2874

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

2875

.format(duration))

2211

2876

# End token found

2212

2877

return value

2213

2878

2214

2879

2215

2880

def string_to_delta(interval):

2216

2881

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

2217

2218

>>> string_to_delta('7d')

2219

datetime.timedelta(7)

2220

>>> string_to_delta('60s')

2221

datetime.timedelta(0, 60)

2222

>>> string_to_delta('60m')

2223

datetime.timedelta(0, 3600)

2224

>>> string_to_delta('24h')

2225

datetime.timedelta(1)

2226

>>> string_to_delta('1w')

2227

datetime.timedelta(7)

2228

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

2229

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

2230

2895

"""

2231

2896

2232

2897

try:

2233

2898

return rfc3339_duration_to_delta(interval)

2234

2899

except ValueError:

2235

2900

pass

2236

2901

2237

2902

timevalue = datetime.timedelta(0)

2238

2903

for s in interval.split():

2239

2904

try:

2240

suffix = unicode(s[-1])

2905

suffix = s[-1]

2241

2906

value = int(s[:-1])

2242

2907

if suffix == "d":

2243

2908

delta = datetime.timedelta(value)

2250

2915

elif suffix == "w":

2251

2916

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

2252

2917

else:

2253

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

2254

.format(suffix))

2255

except (ValueError, IndexError) as e:

2918

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

2919

except IndexError as e:

2256

2920

raise ValueError(*(e.args))

2257

2921

timevalue += delta

2258

2922

return timevalue

2259

2923

2260

2924

2261

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

2925

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

2262

2926

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

2263

2927

2264

2928

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

2265

2929

if os.fork():

2266

2930

sys.exit()

2274

2938

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

2275

2939

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

2276

2940

raise OSError(errno.ENODEV,

2277

"{0} not a character device"

2941

"{} not a character device"

2278

2942

.format(os.devnull))

2279

2943

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

2280

2944

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

2284

2948

2285

2949

2286

2950

def main():

2287

2951

2288

2952

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

2289

2953

# Parsing of options, both command line and config file

2290

2954

2291

2955

parser = argparse.ArgumentParser()

2292

2956

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

2293

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

2957

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

2294

2958

help="show version number and exit")

2295

2959

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

2296

2960

help="Bind to interface IF")

2329

2993

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

2330

2994

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

2331

2995

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

2332

2996

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

2997

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

2998

default=None)

2999

2333

3000

options = parser.parse_args()

2334

2335

if options.check:

2336

import doctest

2337

doctest.testmod()

2338

sys.exit()

2339

3001

2340

3002

# Default values for config file for server-global settings

2341

server_defaults = { "interface": "",

2342

"address": "",

2343

"port": "",

2344

"debug": "False",

2345

"priority":

2346

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

2347

"servicename": "Mandos",

2348

"use_dbus": "True",

2349

"use_ipv6": "True",

2350

"debuglevel": "",

2351

"restore": "True",

2352

"socket": "",

2353

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

2354

"foreground": "False",

2355

}

2356

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

2357

3026

# Parse config file for server-global settings

2358

server_config = configparser.SafeConfigParser(server_defaults)

3027

server_config = configparser.ConfigParser(server_defaults)

2359

3028

del server_defaults

2360

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

2361

"mandos.conf"))

2362

# 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

2363

3031

server_settings = server_config.defaults()

2364

3032

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

2365

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

3033

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

3034

"foreground", "zeroconf"):

2366

3035

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

2367

3036

option)

2368

3037

if server_settings["port"]:

2378

3047

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

2379

3048

["socket"])

2380

3049

del server_config

2381

3050

2382

3051

# Override the settings from the config file with command line

2383

3052

# options, if set.

2384

3053

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

2385

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

2386

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

2387

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

3054

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

3055

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

3056

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

2388

3057

value = getattr(options, option)

2389

3058

if value is not None:

2390

3059

server_settings[option] = value

2391

3060

del options

2392

3061

# Force all strings to be unicode

2393

3062

for option in server_settings.keys():

2394

if type(server_settings[option]) is str:

2395

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"))

2396

3066

# Force all boolean options to be boolean

2397

3067

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

2398

"foreground"):

3068

"foreground", "zeroconf"):

2399

3069

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

2400

3070

# Debug implies foreground

2401

3071

if server_settings["debug"]:

2402

3072

server_settings["foreground"] = True

2403

3073

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

2404

3074

2405

3075

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

2406

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

2407

3082

# For convenience

2408

3083

debug = server_settings["debug"]

2409

3084

debuglevel = server_settings["debuglevel"]

2412

3087

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

2413

3088

stored_state_file)

2414

3089

foreground = server_settings["foreground"]

2415

3090

zeroconf = server_settings["zeroconf"]

3091

2416

3092

if debug:

2417

3093

initlogger(debug, logging.DEBUG)

2418

3094

else:

2421

3097

else:

2422

3098

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

2423

3099

initlogger(debug, level)

2424

3100

2425

3101

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

2426

syslogger.setFormatter(logging.Formatter

2427

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

2428

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

2429

.format(server_settings

2430

["servicename"])))

2431

3102

syslogger.setFormatter(

3103

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

3104

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

3105

server_settings["servicename"])))

3106

2432

3107

# Parse config file with clients

2433

client_config = configparser.SafeConfigParser(Client

2434

.client_defaults)

3108

client_config = configparser.ConfigParser(Client.client_defaults)

2435

3109

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

2436

3110

"clients.conf"))

2437

3111

2438

3112

global mandos_dbus_service

2439

3113

mandos_dbus_service = None

2440

2441

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

2442

server_settings["port"]),

2443

ClientHandler,

2444

interface=(server_settings["interface"]

2445

or None),

2446

use_ipv6=use_ipv6,

2447

gnutls_priority=

2448

server_settings["priority"],

2449

use_dbus=use_dbus,

2450

socketfd=(server_settings["socket"]

2451

or None))

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)

2452

3126

if not foreground:

2453

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

3127

pidfilename = "/run/mandos.pid"

3128

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

3129

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

2454

3130

pidfile = None

2455

3131

try:

2456

pidfile = open(pidfilename, "w")

3132

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

2457

3133

except IOError as e:

2458

3134

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

2459

3135

exc_info=e)

2460

2461

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

3136

3137

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

3138

("mandos", "mandos"),

3139

("nobody", "nogroup")):

2462

3140

try:

2463

3141

uid = pwd.getpwnam(name).pw_uid

2464

gid = pwd.getpwnam(name).pw_gid

3142

gid = pwd.getpwnam(group).pw_gid

2465

3143

break

2466

3144

except KeyError:

2467

3145

continue

2471

3149

try:

2472

3150

os.setgid(gid)

2473

3151

os.setuid(uid)

3152

if debug:

3153

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

3154

gid))

2474

3155

except OSError as error:

3156

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

3157

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

2475

3158

if error.errno != errno.EPERM:

2476

raise error

2477

3159

raise

3160

2478

3161

if debug:

2479

3162

# Enable all possible GnuTLS debugging

2480

3163

2481

3164

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

2482

3165

# - GnuTLS manual

2483

gnutls.library.functions.gnutls_global_set_log_level(11)

2484

2485

@gnutls.library.types.gnutls_log_func

3166

gnutls.global_set_log_level(11)

3167

3168

@gnutls.log_func

2486

3169

def debug_gnutls(level, string):

2487

3170

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

2488

2489

(gnutls.library.functions

2490

.gnutls_global_set_log_function(debug_gnutls))

2491

3171

3172

gnutls.global_set_log_function(debug_gnutls)

3173

2492

3174

# Redirect stdin so all checkers get /dev/null

2493

3175

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

2494

3176

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

2495

3177

if null > 2:

2496

3178

os.close(null)

2497

3179

2498

3180

# Need to fork before connecting to D-Bus

2499

3181

if not foreground:

2500

3182

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

2501

3183

daemon()

2502

2503

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

2504

# need to inform gobject that threads will be used.

2505

gobject.threads_init()

2506

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

2507

3190

global main_loop

2508

3191

# From the Avahi example code

2509

3192

DBusGMainLoop(set_as_default=True)

2510

main_loop = gobject.MainLoop()

3193

main_loop = GLib.MainLoop()

2511

3194

bus = dbus.SystemBus()

2512

3195

# End of Avahi example code

2513

3196

if use_dbus:

2514

3197

try:

2515

3198

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

2516

bus, do_not_queue=True)

2517

old_bus_name = (dbus.service.BusName

2518

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

2519

do_not_queue=True))

2520

except dbus.exceptions.NameExistsException as e:

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:

2521

3205

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

2522

3206

use_dbus = False

2523

3207

server_settings["use_dbus"] = False

2524

3208

tcp_server.use_dbus = False

2525

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2526

service = AvahiServiceToSyslog(name =

2527

server_settings["servicename"],

2528

servicetype = "_mandos._tcp",

2529

protocol = protocol, bus = bus)

2530

if server_settings["interface"]:

2531

service.interface = (if_nametoindex

2532

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

2533

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

2534

3220

global multiprocessing_manager

2535

3221

multiprocessing_manager = multiprocessing.Manager()

2536

3222

2537

3223

client_class = Client

2538

3224

if use_dbus:

2539

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

2540

3225

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

3226

2541

3227

client_settings = Client.config_parser(client_config)

2542

3228

old_client_settings = {}

2543

3229

clients_data = {}

2544

3230

2545

3231

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

2546

3232

global wnull

2547

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

3233

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

2548

3234

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

2549

3235

# mode

2550

3236

if debug or not foreground:

2551

3237

wnull.close()

2552

3238

2553

3239

# Get client data and settings from last running state.

2554

3240

if server_settings["restore"]:

2555

3241

try:

2556

3242

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

2557

clients_data, old_client_settings = (pickle.load

2558

(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"))

2559

3293

os.remove(stored_state_path)

2560

3294

except IOError as e:

2561

3295

if e.errno == errno.ENOENT:

2562

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

2563

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

3296

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

3297

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

2564

3298

else:

2565

3299

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

2566

3300

exc_info=e)

2567

3301

raise

2568

3302

except EOFError as e:

2569

3303

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

2570

"EOFError:", exc_info=e)

2571

3304

"EOFError:",

3305

exc_info=e)

3306

2572

3307

with PGPEngine() as pgp:

2573

for client_name, client in clients_data.iteritems():

3308

for client_name, client in clients_data.items():

2574

3309

# Skip removed clients

2575

3310

if client_name not in client_settings:

2576

3311

continue

2577

3312

2578

3313

# Decide which value to use after restoring saved state.

2579

3314

# We have three different values: Old config file,

2580

3315

# new config file, and saved state.

2585

3320

# For each value in new config, check if it

2586

3321

# differs from the old config value (Except for

2587

3322

# the "secret" attribute)

2588

if (name != "secret" and

2589

value != old_client_settings[client_name]

2590

[name]):

3323

if (name != "secret"

3324

and (value !=

3325

old_client_settings[client_name][name])):

2591

3326

client[name] = value

2592

3327

except KeyError:

2593

3328

pass

2594

3329

2595

3330

# Clients who has passed its expire date can still be

2596

# enabled if its last checker was successful. Clients

3331

# enabled if its last checker was successful. A Client

2597

3332

# whose checker succeeded before we stored its state is

2598

3333

# assumed to have successfully run all checkers during

2599

3334

# downtime.

2601

3336

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

2602

3337

if not client["last_checked_ok"]:

2603

3338

logger.warning(

2604

"disabling client {0} - Client never "

2605

"performed a successful checker"

2606

.format(client_name))

3339

"disabling client {} - Client never "

3340

"performed a successful checker".format(

3341

client_name))

2607

3342

client["enabled"] = False

2608

3343

elif client["last_checker_status"] != 0:

2609

3344

logger.warning(

2610

"disabling client {0} - Client "

2611

"last checker failed with error code {1}"

2612

.format(client_name,

2613

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"]))

2614

3350

client["enabled"] = False

2615

3351

else:

2616

client["expires"] = (datetime.datetime

2617

.utcnow()

2618

+ client["timeout"])

3352

client["expires"] = (

3353

datetime.datetime.utcnow()

3354

+ client["timeout"])

2619

3355

logger.debug("Last checker succeeded,"

2620

" keeping {0} enabled"

2621

.format(client_name))

3356

" keeping {} enabled".format(

3357

client_name))

2622

3358

try:

2623

client["secret"] = (

2624

pgp.decrypt(client["encrypted_secret"],

2625

client_settings[client_name]

2626

["secret"]))

3359

client["secret"] = pgp.decrypt(

3360

client["encrypted_secret"],

3361

client_settings[client_name]["secret"])

2627

3362

except PGPError:

2628

3363

# If decryption fails, we use secret from new settings

2629

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

2630

.format(client_name))

2631

client["secret"] = (

2632

client_settings[client_name]["secret"])

2633

3364

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

3365

client_name))

3366

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

3367

["secret"])

3368

2634

3369

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

2635

3370

for client_name in (set(old_client_settings)

2636

3371

- set(client_settings)):

2638

3373

for client_name in (set(client_settings)

2639

3374

- set(old_client_settings)):

2640

3375

clients_data[client_name] = client_settings[client_name]

2641

3376

2642

3377

# Create all client objects

2643

for client_name, client in clients_data.iteritems():

3378

for client_name, client in clients_data.items():

2644

3379

tcp_server.clients[client_name] = client_class(

2645

name = client_name, settings = client,

2646

server_settings = server_settings)

2647

3380

name=client_name,

3381

settings=client,

3382

server_settings=server_settings)

3383

2648

3384

if not tcp_server.clients:

2649

3385

logger.warning("No clients defined")

2650

3386

2651

3387

if not foreground:

2652

3388

if pidfile is not None:

3389

pid = os.getpid()

2653

3390

try:

2654

3391

with pidfile:

2655

pid = os.getpid()

2656

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

3392

print(pid, file=pidfile)

2657

3393

except IOError:

2658

3394

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

2659

3395

pidfilename, pid)

2660

3396

del pidfile

2661

3397

del pidfilename

2662

2663

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

2664

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

2665

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

2666

3403

if use_dbus:

2667

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

2668

"se.bsnet.fukt.Mandos"})

2669

class MandosDBusService(DBusObjectWithProperties):

3404

3405

@alternate_dbus_interfaces(

3406

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

3407

class MandosDBusService(DBusObjectWithObjectManager):

2670

3408

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

3409

2671

3410

def __init__(self):

2672

3411

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

3412

2673

3413

_interface = "se.recompile.Mandos"

2674

2675

@dbus_interface_annotations(_interface)

2676

def _foo(self):

2677

return { "org.freedesktop.DBus.Property"

2678

".EmitsChangedSignal":

2679

"false"}

2680

3414

2681

3415

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

2682

3416

def ClientAdded(self, objpath):

2683

3417

"D-Bus signal"

2684

3418

pass

2685

3419

2686

3420

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

2687

def ClientNotFound(self, fingerprint, address):

3421

def ClientNotFound(self, key_id, address):

2688

3422

"D-Bus signal"

2689

3423

pass

2690

3424

3425

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

3426

"true"})

2691

3427

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

2692

3428

def ClientRemoved(self, objpath, name):

2693

3429

"D-Bus signal"

2694

3430

pass

2695

3431

3432

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

3433

"true"})

2696

3434

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

2697

3435

def GetAllClients(self):

2698

3436

"D-Bus method"

2699

return dbus.Array(c.dbus_object_path

2700

for c in

2701

tcp_server.clients.itervalues())

2702

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"})

2703

3442

@dbus.service.method(_interface,

2704

3443

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

2705

3444

def GetAllClientsWithProperties(self):

2706

3445

"D-Bus method"

2707

3446

return dbus.Dictionary(

2708

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

2709

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()},

2710

3450

signature="oa{sv}")

2711

3451

2712

3452

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

2713

3453

def RemoveClient(self, object_path):

2714

3454

"D-Bus method"

2715

for c in tcp_server.clients.itervalues():

3455

for c in tcp_server.clients.values():

2716

3456

if c.dbus_object_path == object_path:

2717

3457

del tcp_server.clients[c.name]

2718

3458

c.remove_from_connection()

2719

# Don't signal anything except ClientRemoved

3459

# Don't signal the disabling

2720

3460

c.disable(quiet=True)

2721

# Emit D-Bus signal

2722

self.ClientRemoved(object_path, c.name)

3461

# Emit D-Bus signal for removal

3462

self.client_removed_signal(c)

2723

3463

return

2724

3464

raise KeyError(object_path)

2725

3465

2726

3466

del _interface

2727

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

2728

3504

mandos_dbus_service = MandosDBusService()

2729

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

2730

3511

def cleanup():

2731

3512

"Cleanup function; run on exit"

2732

service.cleanup()

2733

2734

multiprocessing.active_children()

2735

wnull.close()

3513

if zeroconf:

3514

service.cleanup()

3515

3516

mp.active_children()

3517

wn.close()

2736

3518

if not (tcp_server.clients or client_settings):

2737

3519

return

2738

3520

2739

3521

# Store client before exiting. Secrets are encrypted with key

2740

3522

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

2741

3523

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

2742

3524

clients = {}

2743

3525

with PGPEngine() as pgp:

2744

for client in tcp_server.clients.itervalues():

3526

for client in tcp_server.clients.values():

2745

3527

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

2746

3528

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

2747

3529

key)

2748

3530

client_dict = {}

2749

3531

2750

3532

# A list of attributes that can not be pickled

2751

3533

# + secret.

2752

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

2753

"checker", "server_settings"))

2754

for name, typ in (inspect.getmembers

2755

(dbus.service.Object)):

3534

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

3535

"checker", "server_settings"}

3536

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

3537

.Object):

2756

3538

exclude.add(name)

2757

3539

2758

3540

client_dict["encrypted_secret"] = (client

2759

3541

.encrypted_secret)

2760

3542

for attr in client.client_structure:

2761

3543

if attr not in exclude:

2762

3544

client_dict[attr] = getattr(client, attr)

2763

3545

2764

3546

clients[client.name] = client_dict

2765

3547

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

2766

3548

2767

3549

try:

2768

with (tempfile.NamedTemporaryFile

2769

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

2770

dir=os.path.dirname(stored_state_path),

2771

delete=False)) as stored_state:

2772

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

2773

tempname=stored_state.name

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

2774

3559

os.rename(tempname, stored_state_path)

2775

3560

except (IOError, OSError) as e:

2776

3561

if not debug:

2779

3564

except NameError:

2780

3565

pass

2781

3566

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

2782

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

3567

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

2783

3568

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

2784

3569

else:

2785

3570

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

2786

3571

exc_info=e)

2787

raise e

2788

3572

raise

3573

2789

3574

# Delete all clients, and settings from config

2790

3575

while tcp_server.clients:

2791

3576

name, client = tcp_server.clients.popitem()

2792

3577

if use_dbus:

2793

3578

client.remove_from_connection()

2794

# Don't signal anything except ClientRemoved

3579

# Don't signal the disabling

2795

3580

client.disable(quiet=True)

3581

# Emit D-Bus signal for removal

2796

3582

if use_dbus:

2797

# Emit D-Bus signal

2798

mandos_dbus_service.ClientRemoved(client

2799

.dbus_object_path,

2800

client.name)

3583

mandos_dbus_service.client_removed_signal(client)

2801

3584

client_settings.clear()

2802

3585

2803

3586

atexit.register(cleanup)

2804

2805

for client in tcp_server.clients.itervalues():

3587

3588

for client in tcp_server.clients.values():

2806

3589

if use_dbus:

2807

# Emit D-Bus signal

2808

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3590

# Emit D-Bus signal for adding

3591

mandos_dbus_service.client_added_signal(client)

2809

3592

# Need to initiate checking of clients

2810

3593

if client.enabled:

2811

3594

client.init_checker()

2812

3595

2813

3596

tcp_server.enable()

2814

3597

tcp_server.server_activate()

2815

3598

2816

3599

# Find out what port we got

2817

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

3600

if zeroconf:

3601

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

2818

3602

if use_ipv6:

2819

3603

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

2820

3604

" flowinfo %d, scope_id %d",

2822

3606

else: # IPv4

2823

3607

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

2824

3608

*tcp_server.socket.getsockname())

2825

2826

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

2827

3609

3610

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

3611

2828

3612

try:

2829

# From the Avahi example code

2830

try:

2831

service.activate()

2832

except dbus.exceptions.DBusException as error:

2833

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

2834

cleanup()

2835

sys.exit(1)

2836

# End of Avahi example code

2837

2838

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

2839

lambda *args, **kwargs:

2840

(tcp_server.handle_request

2841

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

2842

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

2843

3629

logger.debug("Starting main loop")

2844

3630

main_loop.run()

2845

3631

except AvahiError as error:

2854

3640

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

2855

3641

cleanup()

2856

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

2857

3660

if __name__ == '__main__':

2858

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()