/mandos/trunk : revision 626

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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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#!/usr/bin/python

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# -*- mode: python; 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 file is part of Mandos.

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#

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

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

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#

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

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

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

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# (at your option) any later version.

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#

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

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# WITHOUT ANY WARRANTY; without even the implied warranty of

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

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

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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

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# GNU General Public License for more details.

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#

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#

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

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

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#

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# along with this program. If not, see

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

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#

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

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#

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#

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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try:

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from future_builtins import *

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except ImportError:

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pass

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from future_builtins import *

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try:

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import SocketServer as socketserver

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except ImportError:

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import socketserver

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import SocketServer as socketserver

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import socket

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import argparse

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import datetime

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import errno

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try:

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import ConfigParser as configparser

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except ImportError:

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import configparser

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import gnutls.crypto

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import gnutls.connection

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import gnutls.errors

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import gnutls.library.functions

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import gnutls.library.constants

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import gnutls.library.types

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import ConfigParser as configparser

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import sys

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import re

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import os

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import struct

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import fcntl

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import functools

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try:

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import cPickle as pickle

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except ImportError:

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import pickle

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import cPickle as pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import collections

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import codecs

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import unittest

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import dbus

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import dbus.service

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import gi

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from gi.repository import GLib

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import gobject

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import avahi

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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import ctypes.util

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import xml.dom.minidom

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import inspect

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if sys.version_info.major == 2:

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__metaclass__ = type

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str = unicode

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

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# Try running the C preprocessor:

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try:

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

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"/dev/stdin"],

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE)

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stdout = cc.communicate(

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

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

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except (OSError, ValueError, IndexError):

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# No value found

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SO_BINDTODEVICE = None

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if sys.version_info < (3, 2):

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configparser.Configparser = configparser.SafeConfigParser

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version = "1.8.9"

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SO_BINDTODEVICE = None

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version = "1.6.1"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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

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syslogger = None

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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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try:

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if_nametoindex = ctypes.cdll.LoadLibrary(

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

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.if_nametoindex)

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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

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

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interface))

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

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ifreq[16:20])[0]

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return interface_index

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def copy_function(func):

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

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if sys.version_info.major == 2:

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return types.FunctionType(func.func_code,

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func.func_globals,

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func.func_name,

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func.func_defaults,

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func.func_closure)

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else:

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return types.FunctionType(func.__code__,

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func.__globals__,

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func.__name__,

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func.__defaults__,

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func.__closure__)

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

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"""init logger and add loglevel"""

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global syslogger

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syslogger = (logging.handlers.SysLogHandler(

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facility=logging.handlers.SysLogHandler.LOG_DAEMON,

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address="/dev/log"))

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syslogger.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:

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class PGPEngine(object):

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

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def __init__(self):

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

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self.gpg = "gpg"

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try:

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

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for line in output.splitlines():

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

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if name == b"gpg":

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self.gpg = path

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break

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except OSError as e:

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if e.errno != errno.ENOENT:

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raise

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self.gnupgargs = ['--batch',

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'--homedir', self.tempdir,

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'--home', self.tempdir,

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'--force-mdc',

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'--quiet']

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

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

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

217

146

'--quiet',

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'--no-use-agent']

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218

149

def __enter__(self):

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150

return self

220

151

221

152

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

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153

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):

163

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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171

241

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

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252

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def encrypt(self, data, password):

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passphrase = self.password_encode(password)

254

with tempfile.NamedTemporaryFile(

255

dir=self.tempdir) as passfile:

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with tempfile.NamedTemporaryFile(dir=self.tempdir

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) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin=subprocess.PIPE,

263

stdout=subprocess.PIPE,

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stderr=subprocess.PIPE)

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

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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return ciphertext

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194

270

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def decrypt(self, data, password):

271

196

passphrase = self.password_encode(password)

272

with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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with tempfile.NamedTemporaryFile(dir = self.tempdir

198

) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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

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'--passphrase-file',

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203

passfile.name]

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204

+ self.gnupgargs,

280

stdin=subprocess.PIPE,

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stdout=subprocess.PIPE,

282

stderr=subprocess.PIPE)

283

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

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

208

decrypted_plaintext, err = proc.communicate(input

209

= data)

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if proc.returncode != 0:

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211

raise PGPError(err)

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212

return decrypted_plaintext

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213

288

214

289

# Pretend that we have an Avahi module

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class avahi:

291

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

292

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

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

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PROTO_INET = 0 # avahi-common/address.h

295

PROTO_INET6 = 1 # avahi-common/address.h

296

DBUS_NAME = "org.freedesktop.Avahi"

297

DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"

298

DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

299

DBUS_PATH_SERVER = "/"

300

301

@staticmethod

302

def string_array_to_txt_array(t):

303

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

304

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

305

ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h

306

ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h

307

ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h

308

SERVER_INVALID = 0 # avahi-common/defs.h

309

SERVER_REGISTERING = 1 # avahi-common/defs.h

310

SERVER_RUNNING = 2 # avahi-common/defs.h

311

SERVER_COLLISION = 3 # avahi-common/defs.h

312

SERVER_FAILURE = 4 # avahi-common/defs.h

313

314

315

215

class AvahiError(Exception):

316

216

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

317

217

self.value = value

318

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

319

**kwargs)

320

218

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

219

def __unicode__(self):

220

return unicode(repr(self.value))

321

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322

222

class AvahiServiceError(AvahiError):

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pass

324

224

325

326

225

class AvahiGroupError(AvahiError):

327

226

pass

328

227

329

228

330

class AvahiService:

229

class AvahiService(object):

331

230

"""An Avahi (Zeroconf) service.

332

231

333

232

Attributes:

334

233

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

335

234

Used to optionally bind to the specified interface.

347

246

server: D-Bus Server

348

247

bus: dbus.SystemBus()

349

248

"""

350

351

def __init__(self,

352

interface=avahi.IF_UNSPEC,

353

name=None,

354

servicetype=None,

355

port=None,

356

TXT=None,

357

domain="",

358

host="",

359

max_renames=32768,

360

protocol=avahi.PROTO_UNSPEC,

361

bus=None):

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):

362

254

self.interface = interface

363

255

self.name = name

364

256

self.type = servicetype

373

265

self.server = None

374

266

self.bus = bus

375

267

self.entry_group_state_changed_match = None

376

377

def rename(self, remove=True):

268

269

def rename(self):

378

270

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

379

271

if self.rename_count >= self.max_renames:

380

272

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

381

273

" after %i retries, exiting.",

382

274

self.rename_count)

383

275

raise AvahiServiceError("Too many renames")

384

self.name = str(

385

self.server.GetAlternativeServiceName(self.name))

386

self.rename_count += 1

276

self.name = unicode(self.server

277

.GetAlternativeServiceName(self.name))

387

278

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

388

279

self.name)

389

if remove:

390

self.remove()

280

self.remove()

391

281

try:

392

282

self.add()

393

283

except dbus.exceptions.DBusException as error:

394

if (error.get_dbus_name()

395

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

396

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

397

return self.rename(remove=False)

398

else:

399

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

400

self.cleanup()

401

os._exit(1)

402

284

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

285

self.cleanup()

286

os._exit(1)

287

self.rename_count += 1

288

403

289

def remove(self):

404

290

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

405

291

if self.entry_group_state_changed_match is not None:

407

293

self.entry_group_state_changed_match = None

408

294

if self.group is not None:

409

295

self.group.Reset()

410

296

411

297

def add(self):

412

298

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

413

299

self.remove()

430

316

dbus.UInt16(self.port),

431

317

avahi.string_array_to_txt_array(self.TXT))

432

318

self.group.Commit()

433

319

434

320

def entry_group_state_changed(self, state, error):

435

321

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

436

322

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

437

323

438

324

if state == avahi.ENTRY_GROUP_ESTABLISHED:

439

325

logger.debug("Zeroconf service established.")

440

326

elif state == avahi.ENTRY_GROUP_COLLISION:

442

328

self.rename()

443

329

elif state == avahi.ENTRY_GROUP_FAILURE:

444

330

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

445

str(error))

446

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

447

331

unicode(error))

332

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

333

.format(error))

334

448

335

def cleanup(self):

449

336

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

450

337

if self.group is not None:

455

342

pass

456

343

self.group = None

457

344

self.remove()

458

345

459

346

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

460

347

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

461

348

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

462

bad_states = {

463

avahi.SERVER_INVALID: "Zeroconf server invalid",

464

avahi.SERVER_REGISTERING: None,

465

avahi.SERVER_COLLISION: "Zeroconf server name collision",

466

avahi.SERVER_FAILURE: "Zeroconf server failure",

467

}

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" }

468

356

if state in bad_states:

469

357

if bad_states[state] is not None:

470

358

if error is None:

473

361

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

474

362

self.cleanup()

475

363

elif state == avahi.SERVER_RUNNING:

476

try:

477

self.add()

478

except dbus.exceptions.DBusException as error:

479

if (error.get_dbus_name()

480

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

481

logger.info("Local Zeroconf service name"

482

" collision.")

483

return self.rename(remove=False)

484

else:

485

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

486

self.cleanup()

487

os._exit(1)

364

self.add()

488

365

else:

489

366

if error is None:

490

367

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

491

368

else:

492

369

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

493

370

494

371

def activate(self):

495

372

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

496

373

if self.server is None:

500

377

follow_name_owner_changes=True),

501

378

avahi.DBUS_INTERFACE_SERVER)

502

379

self.server.connect_to_signal("StateChanged",

503

self.server_state_changed)

380

self.server_state_changed)

504

381

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

505

382

506

383

507

384

class AvahiServiceToSyslog(AvahiService):

508

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

385

def rename(self):

509

386

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

510

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

511

syslogger.setFormatter(logging.Formatter(

512

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

513

.format(self.name)))

387

ret = AvahiService.rename(self)

388

syslogger.setFormatter(logging.Formatter

389

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

390

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

391

.format(self.name)))

514

392

return ret

515

393

516

394

517

# Pretend that we have a GnuTLS module

518

class gnutls:

519

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

520

521

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

522

if library is None:

523

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

524

_library = ctypes.cdll.LoadLibrary(library)

525

del library

526

527

# Unless otherwise indicated, the constants and types below are

528

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

529

530

# Constants

531

E_SUCCESS = 0

532

E_INTERRUPTED = -52

533

E_AGAIN = -28

534

CRT_OPENPGP = 2

535

CRT_RAWPK = 3

536

CLIENT = 2

537

SHUT_RDWR = 0

538

CRD_CERTIFICATE = 1

539

E_NO_CERTIFICATE_FOUND = -49

540

X509_FMT_DER = 0

541

NO_TICKETS = 1<<10

542

ENABLE_RAWPK = 1<<18

543

CTYPE_PEERS = 3

544

KEYID_USE_SHA256 = 1 # gnutls/x509.h

545

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

546

547

# Types

548

class session_int(ctypes.Structure):

549

_fields_ = []

550

session_t = ctypes.POINTER(session_int)

551

552

class certificate_credentials_st(ctypes.Structure):

553

_fields_ = []

554

certificate_credentials_t = ctypes.POINTER(

555

certificate_credentials_st)

556

certificate_type_t = ctypes.c_int

557

558

class datum_t(ctypes.Structure):

559

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

560

('size', ctypes.c_uint)]

561

562

class openpgp_crt_int(ctypes.Structure):

563

_fields_ = []

564

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

565

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

566

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

567

credentials_type_t = ctypes.c_int

568

transport_ptr_t = ctypes.c_void_p

569

close_request_t = ctypes.c_int

570

571

# Exceptions

572

class Error(Exception):

573

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

574

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

575

# code is passed, convert it to a string with

576

# gnutls.strerror()

577

self.code = code

578

if message is None and code is not None:

579

message = gnutls.strerror(code)

580

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

581

message, *args)

582

583

class CertificateSecurityError(Error):

584

pass

585

586

# Classes

587

class Credentials:

588

def __init__(self):

589

self._c_object = gnutls.certificate_credentials_t()

590

gnutls.certificate_allocate_credentials(

591

ctypes.byref(self._c_object))

592

self.type = gnutls.CRD_CERTIFICATE

593

594

def __del__(self):

595

gnutls.certificate_free_credentials(self._c_object)

596

597

class ClientSession:

598

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

599

self._c_object = gnutls.session_t()

600

gnutls_flags = gnutls.CLIENT

601

if gnutls.check_version(b"3.5.6"):

602

gnutls_flags |= gnutls.NO_TICKETS

603

if gnutls.has_rawpk:

604

gnutls_flags |= gnutls.ENABLE_RAWPK

605

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

606

del gnutls_flags

607

gnutls.set_default_priority(self._c_object)

608

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

609

gnutls.handshake_set_private_extensions(self._c_object,

610

True)

611

self.socket = socket

612

if credentials is None:

613

credentials = gnutls.Credentials()

614

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

615

ctypes.cast(credentials._c_object,

616

ctypes.c_void_p))

617

self.credentials = credentials

618

619

def __del__(self):

620

gnutls.deinit(self._c_object)

621

622

def handshake(self):

623

return gnutls.handshake(self._c_object)

624

625

def send(self, data):

626

data = bytes(data)

627

data_len = len(data)

628

while data_len > 0:

629

data_len -= gnutls.record_send(self._c_object,

630

data[-data_len:],

631

data_len)

632

633

def bye(self):

634

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

635

636

# Error handling functions

637

def _error_code(result):

638

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

639

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

640

if result >= 0:

641

return result

642

if result == gnutls.E_NO_CERTIFICATE_FOUND:

643

raise gnutls.CertificateSecurityError(code=result)

644

raise gnutls.Error(code=result)

645

646

def _retry_on_error(result, func, arguments):

647

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

648

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

649

while result < 0:

650

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

651

return _error_code(result)

652

result = func(*arguments)

653

return result

654

655

# Unless otherwise indicated, the function declarations below are

656

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

657

658

# Functions

659

priority_set_direct = _library.gnutls_priority_set_direct

660

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

661

ctypes.POINTER(ctypes.c_char_p)]

662

priority_set_direct.restype = _error_code

663

664

init = _library.gnutls_init

665

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

666

init.restype = _error_code

667

668

set_default_priority = _library.gnutls_set_default_priority

669

set_default_priority.argtypes = [session_t]

670

set_default_priority.restype = _error_code

671

672

record_send = _library.gnutls_record_send

673

record_send.argtypes = [session_t, ctypes.c_void_p,

674

ctypes.c_size_t]

675

record_send.restype = ctypes.c_ssize_t

676

record_send.errcheck = _retry_on_error

677

678

certificate_allocate_credentials = (

679

_library.gnutls_certificate_allocate_credentials)

680

certificate_allocate_credentials.argtypes = [

681

ctypes.POINTER(certificate_credentials_t)]

682

certificate_allocate_credentials.restype = _error_code

683

684

certificate_free_credentials = (

685

_library.gnutls_certificate_free_credentials)

686

certificate_free_credentials.argtypes = [

687

certificate_credentials_t]

688

certificate_free_credentials.restype = None

689

690

handshake_set_private_extensions = (

691

_library.gnutls_handshake_set_private_extensions)

692

handshake_set_private_extensions.argtypes = [session_t,

693

ctypes.c_int]

694

handshake_set_private_extensions.restype = None

695

696

credentials_set = _library.gnutls_credentials_set

697

credentials_set.argtypes = [session_t, credentials_type_t,

698

ctypes.c_void_p]

699

credentials_set.restype = _error_code

700

701

strerror = _library.gnutls_strerror

702

strerror.argtypes = [ctypes.c_int]

703

strerror.restype = ctypes.c_char_p

704

705

certificate_type_get = _library.gnutls_certificate_type_get

706

certificate_type_get.argtypes = [session_t]

707

certificate_type_get.restype = _error_code

708

709

certificate_get_peers = _library.gnutls_certificate_get_peers

710

certificate_get_peers.argtypes = [session_t,

711

ctypes.POINTER(ctypes.c_uint)]

712

certificate_get_peers.restype = ctypes.POINTER(datum_t)

713

714

global_set_log_level = _library.gnutls_global_set_log_level

715

global_set_log_level.argtypes = [ctypes.c_int]

716

global_set_log_level.restype = None

717

718

global_set_log_function = _library.gnutls_global_set_log_function

719

global_set_log_function.argtypes = [log_func]

720

global_set_log_function.restype = None

721

722

deinit = _library.gnutls_deinit

723

deinit.argtypes = [session_t]

724

deinit.restype = None

725

726

handshake = _library.gnutls_handshake

727

handshake.argtypes = [session_t]

728

handshake.restype = _error_code

729

handshake.errcheck = _retry_on_error

730

731

transport_set_ptr = _library.gnutls_transport_set_ptr

732

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

733

transport_set_ptr.restype = None

734

735

bye = _library.gnutls_bye

736

bye.argtypes = [session_t, close_request_t]

737

bye.restype = _error_code

738

bye.errcheck = _retry_on_error

739

740

check_version = _library.gnutls_check_version

741

check_version.argtypes = [ctypes.c_char_p]

742

check_version.restype = ctypes.c_char_p

743

744

_need_version = b"3.3.0"

745

if check_version(_need_version) is None:

746

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

747

.format(_need_version))

748

749

_tls_rawpk_version = b"3.6.6"

750

has_rawpk = bool(check_version(_tls_rawpk_version))

751

752

if has_rawpk:

753

# Types

754

class pubkey_st(ctypes.Structure):

755

_fields = []

756

pubkey_t = ctypes.POINTER(pubkey_st)

757

758

x509_crt_fmt_t = ctypes.c_int

759

760

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

761

pubkey_init = _library.gnutls_pubkey_init

762

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

763

pubkey_init.restype = _error_code

764

765

pubkey_import = _library.gnutls_pubkey_import

766

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

767

x509_crt_fmt_t]

768

pubkey_import.restype = _error_code

769

770

pubkey_get_key_id = _library.gnutls_pubkey_get_key_id

771

pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,

772

ctypes.POINTER(ctypes.c_ubyte),

773

ctypes.POINTER(ctypes.c_size_t)]

774

pubkey_get_key_id.restype = _error_code

775

776

pubkey_deinit = _library.gnutls_pubkey_deinit

777

pubkey_deinit.argtypes = [pubkey_t]

778

pubkey_deinit.restype = None

779

else:

780

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

781

782

openpgp_crt_init = _library.gnutls_openpgp_crt_init

783

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

784

openpgp_crt_init.restype = _error_code

785

786

openpgp_crt_import = _library.gnutls_openpgp_crt_import

787

openpgp_crt_import.argtypes = [openpgp_crt_t,

788

ctypes.POINTER(datum_t),

789

openpgp_crt_fmt_t]

790

openpgp_crt_import.restype = _error_code

791

792

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

793

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

794

ctypes.POINTER(ctypes.c_uint)]

795

openpgp_crt_verify_self.restype = _error_code

796

797

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

798

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

799

openpgp_crt_deinit.restype = None

800

801

openpgp_crt_get_fingerprint = (

802

_library.gnutls_openpgp_crt_get_fingerprint)

803

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

804

ctypes.c_void_p,

805

ctypes.POINTER(

806

ctypes.c_size_t)]

807

openpgp_crt_get_fingerprint.restype = _error_code

808

809

if check_version(b"3.6.4"):

810

certificate_type_get2 = _library.gnutls_certificate_type_get2

811

certificate_type_get2.argtypes = [session_t, ctypes.c_int]

812

certificate_type_get2.restype = _error_code

813

814

# Remove non-public functions

815

del _error_code, _retry_on_error

816

817

818

def call_pipe(connection, # : multiprocessing.Connection

819

func, *args, **kwargs):

820

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

821

822

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

823

return value on the provided multiprocessing.Connection.

824

"""

825

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

826

connection.close()

827

828

829

class Client:

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):

830

403

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

831

404

832

405

Attributes:

833

406

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

834

407

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

835

408

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

836

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

837

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

838

running.

839

checker_callback_tag: a GLib event source tag, or None

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

840

413

checker_command: string; External command which is run to check

841

414

if client lives. %() expansions are done at

842

415

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

843

416

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

844

checker_initiator_tag: a GLib event source tag, or None

417

checker_initiator_tag: a gobject event source tag, or None

845

418

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

846

419

client_structure: Object describing what attributes a client has

847

420

and is used for storing the client at exit

848

421

current_checker_command: string; current running checker_command

849

disable_initiator_tag: a GLib event source tag, or None

422

disable_initiator_tag: a gobject event source tag, or None

850

423

enabled: bool()

851

424

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

852

uniquely identify an OpenPGP client

853

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

854

a client using raw public keys

425

uniquely identify the client

855

426

host: string; available for use by the checker command

856

427

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

857

428

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

859

430

last_checker_status: integer between 0 and 255 reflecting exit

860

431

status of last checker. -1 reflects crashed

861

432

checker, -2 means no checker completed yet.

862

last_checker_signal: The signal which killed the last checker, if

863

last_checker_status is -1

864

433

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

865

434

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

866

435

D-Bus identifiers

873

442

disabled, or None

874

443

server_settings: The server_settings dict from main()

875

444

"""

876

445

877

446

runtime_expansions = ("approval_delay", "approval_duration",

878

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

447

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

879

448

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

880

449

"last_approval_request", "last_checked_ok",

881

450

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

882

client_defaults = {

883

"timeout": "PT5M",

884

"extended_timeout": "PT15M",

885

"interval": "PT2M",

886

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

887

"host": "",

888

"approval_delay": "PT0S",

889

"approval_duration": "PT1S",

890

"approved_by_default": "True",

891

"enabled": "True",

892

}

893

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

894

477

@staticmethod

895

478

def config_parser(config):

896

479

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

903

486

for client_name in config.sections():

904

487

section = dict(config.items(client_name))

905

488

client = settings[client_name] = {}

906

489

907

490

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

908

491

# Reformat values from string types to Python types

909

492

client["approved_by_default"] = config.getboolean(

910

493

client_name, "approved_by_default")

911

494

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

912

495

"enabled")

913

914

# Uppercase and remove spaces from key_id and fingerprint

915

# for later comparison purposes with return value from the

916

# key_id() and fingerprint() functions

917

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

918

.replace(" ", ""))

496

919

497

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

920

498

.replace(" ", ""))

921

499

if "secret" in section:

922

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

923

.encode("utf-8"),

924

"base64")

500

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

925

501

elif "secfile" in section:

926

502

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

927

503

(section["secfile"])),

928

504

"rb") as secfile:

929

505

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

930

506

else:

931

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

507

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

932

508

.format(section))

933

509

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

934

510

client["extended_timeout"] = string_to_delta(

942

518

client["last_approval_request"] = None

943

519

client["last_checked_ok"] = None

944

520

client["last_checker_status"] = -2

945

521

946

522

return settings

947

948

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

523

524

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

949

525

self.name = name

950

526

if server_settings is None:

951

527

server_settings = {}

952

528

self.server_settings = server_settings

953

529

# adding all client settings

954

for setting, value in settings.items():

530

for setting, value in settings.iteritems():

955

531

setattr(self, setting, value)

956

532

957

533

if self.enabled:

958

534

if not hasattr(self, "last_enabled"):

959

535

self.last_enabled = datetime.datetime.utcnow()

963

539

else:

964

540

self.last_enabled = None

965

541

self.expires = None

966

542

967

543

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

968

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

544

# Uppercase and remove spaces from fingerprint for later

545

# comparison purposes with return value from the fingerprint()

546

# function

969

547

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

970

548

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

971

549

datetime.datetime.utcnow())

972

550

973

551

# attributes specific for this server instance

974

552

self.checker = None

975

553

self.checker_initiator_tag = None

978

556

self.current_checker_command = None

979

557

self.approved = None

980

558

self.approvals_pending = 0

981

self.changedstate = multiprocessing_manager.Condition(

982

multiprocessing_manager.Lock())

983

self.client_structure = [attr

984

for attr in self.__dict__.keys()

559

self.changedstate = (multiprocessing_manager

560

.Condition(multiprocessing_manager

561

.Lock()))

562

self.client_structure = [attr for attr in

563

self.__dict__.iterkeys()

985

564

if not attr.startswith("_")]

986

565

self.client_structure.append("client_structure")

987

988

for name, t in inspect.getmembers(

989

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

566

567

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

568

lambda obj:

569

isinstance(obj,

570

property)):

990

571

if not name.startswith("_"):

991

572

self.client_structure.append(name)

992

573

993

574

# Send notice to process children that client state has changed

994

575

def send_changedstate(self):

995

576

with self.changedstate:

996

577

self.changedstate.notify_all()

997

578

998

579

def enable(self):

999

580

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

1000

581

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

1005

586

self.last_enabled = datetime.datetime.utcnow()

1006

587

self.init_checker()

1007

588

self.send_changedstate()

1008

589

1009

590

def disable(self, quiet=True):

1010

591

"""Disable this client."""

1011

592

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

1013

594

if not quiet:

1014

595

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

1015

596

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

1016

GLib.source_remove(self.disable_initiator_tag)

597

gobject.source_remove(self.disable_initiator_tag)

1017

598

self.disable_initiator_tag = None

1018

599

self.expires = None

1019

600

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

1020

GLib.source_remove(self.checker_initiator_tag)

601

gobject.source_remove(self.checker_initiator_tag)

1021

602

self.checker_initiator_tag = None

1022

603

self.stop_checker()

1023

604

self.enabled = False

1024

605

if not quiet:

1025

606

self.send_changedstate()

1026

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

607

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

1027

608

return False

1028

609

1029

610

def __del__(self):

1030

611

self.disable()

1031

612

1032

613

def init_checker(self):

1033

614

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

1034

615

# and every interval from then on.

1035

616

if self.checker_initiator_tag is not None:

1036

GLib.source_remove(self.checker_initiator_tag)

1037

self.checker_initiator_tag = GLib.timeout_add(

1038

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

1039

self.start_checker)

617

gobject.source_remove(self.checker_initiator_tag)

618

self.checker_initiator_tag = (gobject.timeout_add

619

(self.interval_milliseconds(),

620

self.start_checker))

1040

621

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

1041

622

if self.disable_initiator_tag is not None:

1042

GLib.source_remove(self.disable_initiator_tag)

1043

self.disable_initiator_tag = GLib.timeout_add(

1044

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

623

gobject.source_remove(self.disable_initiator_tag)

624

self.disable_initiator_tag = (gobject.timeout_add

625

(self.timeout_milliseconds(),

626

self.disable))

1045

627

# Also start a new checker *right now*.

1046

628

self.start_checker()

1047

1048

def checker_callback(self, source, condition, connection,

1049

command):

629

630

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

1050

631

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

1051

# Read return code from connection (see call_pipe)

1052

returncode = connection.recv()

1053

connection.close()

1054

if self.checker is not None:

1055

self.checker.join()

1056

632

self.checker_callback_tag = None

1057

633

self.checker = None

1058

1059

if returncode >= 0:

1060

self.last_checker_status = returncode

1061

self.last_checker_signal = None

634

if os.WIFEXITED(condition):

635

self.last_checker_status = os.WEXITSTATUS(condition)

1062

636

if self.last_checker_status == 0:

1063

637

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

1064

638

vars(self))

1065

639

self.checked_ok()

1066

640

else:

1067

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

641

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

642

vars(self))

1068

643

else:

1069

644

self.last_checker_status = -1

1070

self.last_checker_signal = -returncode

1071

645

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

1072

646

vars(self))

1073

return False

1074

647

1075

648

def checked_ok(self):

1076

649

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

1077

650

self.last_checked_ok = datetime.datetime.utcnow()

1078

651

self.last_checker_status = 0

1079

self.last_checker_signal = None

1080

652

self.bump_timeout()

1081

653

1082

654

def bump_timeout(self, timeout=None):

1083

655

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

1084

656

if timeout is None:

1085

657

timeout = self.timeout

1086

658

if self.disable_initiator_tag is not None:

1087

GLib.source_remove(self.disable_initiator_tag)

659

gobject.source_remove(self.disable_initiator_tag)

1088

660

self.disable_initiator_tag = None

1089

661

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

1090

self.disable_initiator_tag = GLib.timeout_add(

1091

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

662

self.disable_initiator_tag = (gobject.timeout_add

663

(timedelta_to_milliseconds

664

(timeout), self.disable))

1092

665

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

1093

666

1094

667

def need_approval(self):

1095

668

self.last_approval_request = datetime.datetime.utcnow()

1096

669

1097

670

def start_checker(self):

1098

671

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

1099

672

1100

673

If a checker already exists, leave it running and do

1101

674

nothing."""

1102

675

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

1107

680

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

1108

681

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

1109

682

# should be.

1110

1111

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

1112

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

1113

self.checker.join()

1114

self.checker = None

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)

1115

697

# Start a new checker if needed

1116

698

if self.checker is None:

1117

699

# Escape attributes for the shell

1118

escaped_attrs = {

1119

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

1120

for attr in self.runtime_expansions}

700

escaped_attrs = dict(

701

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

702

for attr in

703

self.runtime_expansions)

1121

704

try:

1122

705

command = self.checker_command % escaped_attrs

1123

706

except TypeError as error:

1124

707

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

1125

self.checker_command,

708

self.checker_command, exc_info=error)

709

return True # Try again later

710

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",

1126

732

exc_info=error)

1127

return True # Try again later

1128

self.current_checker_command = command

1129

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

1130

self.name)

1131

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

1132

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

1133

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

1134

# always replaced by /dev/null.)

1135

# The exception is when not debugging but nevertheless

1136

# running in the foreground; use the previously

1137

# created wnull.

1138

popen_args = {"close_fds": True,

1139

"shell": True,

1140

"cwd": "/"}

1141

if (not self.server_settings["debug"]

1142

and self.server_settings["foreground"]):

1143

popen_args.update({"stdout": wnull,

1144

"stderr": wnull})

1145

pipe = multiprocessing.Pipe(duplex=False)

1146

self.checker = multiprocessing.Process(

1147

target=call_pipe,

1148

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

1149

kwargs=popen_args)

1150

self.checker.start()

1151

self.checker_callback_tag = GLib.io_add_watch(

1152

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

1153

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

1154

self.checker_callback, pipe[0], command)

1155

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

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

1156

753

return True

1157

754

1158

755

def stop_checker(self):

1159

756

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

1160

757

if self.checker_callback_tag:

1161

GLib.source_remove(self.checker_callback_tag)

758

gobject.source_remove(self.checker_callback_tag)

1162

759

self.checker_callback_tag = None

1163

760

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

1164

761

return

1165

762

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

1166

self.checker.terminate()

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

1167

771

self.checker = None

1168

772

1169

773

1170

def dbus_service_property(dbus_interface,

1171

signature="v",

1172

access="readwrite",

1173

byte_arrays=False):

774

def dbus_service_property(dbus_interface, signature="v",

775

access="readwrite", byte_arrays=False):

1174

776

"""Decorators for marking methods of a DBusObjectWithProperties to

1175

777

become properties on the D-Bus.

1176

778

1177

779

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

1178

780

and with one argument by "Set".

1179

781

1180

782

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

1181

783

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

1182

784

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

1185

787

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

1186

788

if byte_arrays and signature != "ay":

1187

789

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

1188

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

1189

790

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

1190

791

def decorator(func):

1191

792

func._dbus_is_property = True

1192

793

func._dbus_interface = dbus_interface

1195

796

func._dbus_name = func.__name__

1196

797

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

1197

798

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

1198

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

799

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1199

800

return func

1200

1201

801

return decorator

1202

802

1203

803

1204

804

def dbus_interface_annotations(dbus_interface):

1205

805

"""Decorator for marking functions returning interface annotations

1206

806

1207

807

Usage:

1208

808

1209

809

@dbus_interface_annotations("org.example.Interface")

1210

810

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

1211

811

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

1212

812

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

1213

813

"false"}

1214

814

"""

1215

1216

815

def decorator(func):

1217

816

func._dbus_is_interface = True

1218

817

func._dbus_interface = dbus_interface

1219

818

func._dbus_name = dbus_interface

1220

819

return func

1221

1222

820

return decorator

1223

821

1224

822

1225

823

def dbus_annotations(annotations):

1226

824

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

1227

825

Usage:

1228

1229

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

1230

"org.freedesktop.DBus.Property."

1231

"EmitsChangedSignal": "false"})

826

1232

827

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

1233

828

access="r")

829

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

830

"org.freedesktop.DBus.Property."

831

"EmitsChangedSignal": "false"})

1234

832

def Property_dbus_property(self):

1235

833

return dbus.Boolean(False)

1236

1237

See also the DBusObjectWithAnnotations class.

1238

834

"""

1239

1240

835

def decorator(func):

1241

836

func._dbus_annotations = annotations

1242

837

return func

1243

1244

838

return decorator

1245

839

1246

840

1247

841

class DBusPropertyException(dbus.exceptions.DBusException):

1248

842

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

1249

843

"""

1250

pass

844

def __unicode__(self):

845

return unicode(str(self))

1251

846

1252

847

1253

848

class DBusPropertyAccessException(DBusPropertyException):

1262

857

pass

1263

858

1264

859

1265

class DBusObjectWithAnnotations(dbus.service.Object):

1266

"""A D-Bus object with annotations.

1267

1268

Classes inheriting from this can use the dbus_annotations

1269

decorator to add annotations to methods or signals.

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.

1270

866

"""

1271

867

1272

868

@staticmethod

1273

869

def _is_dbus_thing(thing):

1274

870

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

1275

871

1276

872

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

1277

873

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

1278

874

"""

1279

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

875

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

1280

876

False)

1281

877

1282

878

def _get_all_dbus_things(self, thing):

1283

879

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

1284

880

"""

1285

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

881

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

882

name),

1286

883

athing.__get__(self))

1287

884

for cls in self.__class__.__mro__

1288

885

for name, athing in

1289

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

1290

1291

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1292

out_signature="s",

1293

path_keyword='object_path',

1294

connection_keyword='connection')

1295

def Introspect(self, object_path, connection):

1296

"""Overloading of standard D-Bus method.

1297

1298

Inserts annotation tags on methods and signals.

1299

"""

1300

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

1301

connection)

1302

try:

1303

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

1304

1305

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

1306

# Add annotation tags

1307

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

1308

for tag in if_tag.getElementsByTagName(typ):

1309

annots = dict()

1310

for name, prop in (self.

1311

_get_all_dbus_things(typ)):

1312

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

1313

and prop._dbus_interface

1314

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

1315

annots.update(getattr(

1316

prop, "_dbus_annotations", {}))

1317

for name, value in annots.items():

1318

ann_tag = document.createElement(

1319

"annotation")

1320

ann_tag.setAttribute("name", name)

1321

ann_tag.setAttribute("value", value)

1322

tag.appendChild(ann_tag)

1323

# Add interface annotation tags

1324

for annotation, value in dict(

1325

itertools.chain.from_iterable(

1326

annotations().items()

1327

for name, annotations

1328

in self._get_all_dbus_things("interface")

1329

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

1330

)).items():

1331

ann_tag = document.createElement("annotation")

1332

ann_tag.setAttribute("name", annotation)

1333

ann_tag.setAttribute("value", value)

1334

if_tag.appendChild(ann_tag)

1335

# Fix argument name for the Introspect method itself

1336

if (if_tag.getAttribute("name")

1337

== dbus.INTROSPECTABLE_IFACE):

1338

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

1339

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

1340

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

1341

if (arg.getAttribute("direction")

1342

== "out"):

1343

arg.setAttribute("name",

1344

"xml_data")

1345

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

1346

document.unlink()

1347

except (AttributeError, xml.dom.DOMException,

1348

xml.parsers.expat.ExpatError) as error:

1349

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

1350

exc_info=error)

1351

return xmlstring

1352

1353

1354

class DBusObjectWithProperties(DBusObjectWithAnnotations):

1355

"""A D-Bus object with properties.

1356

1357

Classes inheriting from this can use the dbus_service_property

1358

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

1359

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

1360

"""

1361

886

inspect.getmembers(cls,

887

self._is_dbus_thing(thing)))

888

1362

889

def _get_dbus_property(self, interface_name, property_name):

1363

890

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

1364

891

property with the specified name and interface.

1365

892

"""

1366

for cls in self.__class__.__mro__:

1367

for name, value in inspect.getmembers(

1368

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

893

for cls in self.__class__.__mro__:

894

for name, value in (inspect.getmembers

895

(cls,

896

self._is_dbus_thing("property"))):

1369

897

if (value._dbus_name == property_name

1370

898

and value._dbus_interface == interface_name):

1371

899

return value.__get__(self)

1372

900

1373

901

# No such property

1374

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

1375

self.dbus_object_path, interface_name, property_name))

1376

1377

@classmethod

1378

def _get_all_interface_names(cls):

1379

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

1380

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

1381

"_dbus_interface", None)

1382

for x in (inspect.getmro(cls))

1383

for attr in dir(x))

1384

if name is not None)

1385

1386

@dbus.service.method(dbus.PROPERTIES_IFACE,

1387

in_signature="ss",

902

raise DBusPropertyNotFound(self.dbus_object_path + ":"

903

+ interface_name + "."

904

+ property_name)

905

906

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

1388

907

out_signature="v")

1389

908

def Get(self, interface_name, property_name):

1390

909

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

1396

915

if not hasattr(value, "variant_level"):

1397

916

return value

1398

917

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

1399

918

1400

919

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

1401

920

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

1402

921

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

1408

927

# The byte_arrays option is not supported yet on

1409

928

# signatures other than "ay".

1410

929

if prop._dbus_signature != "ay":

1411

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

1412

"'ay' signature {!r}"

1413

.format(prop._dbus_signature))

1414

value = dbus.ByteArray(bytes(value))

930

raise ValueError

931

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

932

for byte in value))

1415

933

prop(value)

1416

1417

@dbus.service.method(dbus.PROPERTIES_IFACE,

1418

in_signature="s",

934

935

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

1419

936

out_signature="a{sv}")

1420

937

def GetAll(self, interface_name):

1421

938

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

1422

939

standard.

1423

940

1424

941

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

1425

942

"""

1426

943

properties = {}

1436

953

if not hasattr(value, "variant_level"):

1437

954

properties[name] = value

1438

955

continue

1439

properties[name] = type(value)(

1440

value, variant_level=value.variant_level + 1)

956

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

957

value.variant_level+1)

1441

958

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

1442

1443

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

1444

def PropertiesChanged(self, interface_name, changed_properties,

1445

invalidated_properties):

1446

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

1447

standard.

1448

"""

1449

pass

1450

959

1451

960

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1452

961

out_signature="s",

1453

962

path_keyword='object_path',

1454

963

connection_keyword='connection')

1455

964

def Introspect(self, object_path, connection):

1456

965

"""Overloading of standard D-Bus method.

1457

966

1458

967

Inserts property tags and interface annotation tags.

1459

968

"""

1460

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1461

object_path,

1462

connection)

969

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

970

connection)

1463

971

try:

1464

972

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

1465

1466

973

def make_tag(document, name, prop):

1467

974

e = document.createElement("property")

1468

975

e.setAttribute("name", name)

1469

976

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

1470

977

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

1471

978

return e

1472

1473

979

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

1474

980

# Add property tags

1475

981

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

1478

984

if prop._dbus_interface

1479

985

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

1480

986

if_tag.appendChild(tag)

1481

# Add annotation tags for properties

1482

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

1483

annots = dict()

1484

for name, prop in self._get_all_dbus_things(

1485

"property"):

1486

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

1487

and prop._dbus_interface

1488

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

1489

annots.update(getattr(

1490

prop, "_dbus_annotations", {}))

1491

for name, value in annots.items():

1492

ann_tag = document.createElement(

1493

"annotation")

1494

ann_tag.setAttribute("name", name)

1495

ann_tag.setAttribute("value", value)

1496

tag.appendChild(ann_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)

1497

1018

# Add the names to the return values for the

1498

1019

# "org.freedesktop.DBus.Properties" methods

1499

1020

if (if_tag.getAttribute("name")

1518

1039

return xmlstring

1519

1040

1520

1041

1521

try:

1522

dbus.OBJECT_MANAGER_IFACE

1523

except AttributeError:

1524

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

1525

1526

1527

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1528

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

1529

1530

Classes inheriting from this exposes the standard

1531

GetManagedObjects call and the InterfacesAdded and

1532

InterfacesRemoved signals on the standard

1533

"org.freedesktop.DBus.ObjectManager" interface.

1534

1535

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

1536

manually.

1537

"""

1538

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1539

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

1540

def GetManagedObjects(self):

1541

"""This function must be overridden"""

1542

raise NotImplementedError()

1543

1544

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1545

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

1546

def InterfacesAdded(self, object_path, interfaces_and_properties):

1547

pass

1548

1549

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

1550

def InterfacesRemoved(self, object_path, interfaces):

1551

pass

1552

1553

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1554

out_signature="s",

1555

path_keyword='object_path',

1556

connection_keyword='connection')

1557

def Introspect(self, object_path, connection):

1558

"""Overloading of standard D-Bus method.

1559

1560

Override return argument name of GetManagedObjects to be

1561

"objpath_interfaces_and_properties"

1562

"""

1563

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1564

object_path,

1565

connection)

1566

try:

1567

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

1568

1569

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

1570

# Fix argument name for the GetManagedObjects method

1571

if (if_tag.getAttribute("name")

1572

== dbus.OBJECT_MANAGER_IFACE):

1573

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

1574

if (cn.getAttribute("name")

1575

== "GetManagedObjects"):

1576

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

1577

if (arg.getAttribute("direction")

1578

== "out"):

1579

arg.setAttribute(

1580

"name",

1581

"objpath_interfaces"

1582

"_and_properties")

1583

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

1584

document.unlink()

1585

except (AttributeError, xml.dom.DOMException,

1586

xml.parsers.expat.ExpatError) as error:

1587

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

1588

exc_info=error)

1589

return xmlstring

1590

1591

1592

1042

def datetime_to_dbus(dt, variant_level=0):

1593

1043

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

1594

1044

if dt is None:

1595

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

1596

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

1045

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

1046

return dbus.String(dt.isoformat(),

1047

variant_level=variant_level)

1597

1048

1598

1049

1599

1050

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1601

1052

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

1602

1053

interface names according to the "alt_interface_names" mapping.

1603

1054

Usage:

1604

1055

1605

1056

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

1606

1057

"net.example.AlternateInterface"})

1607

1058

class SampleDBusObject(dbus.service.Object):

1608

1059

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

1609

1060

def SampleDBusMethod():

1610

1061

pass

1611

1062

1612

1063

The above "SampleDBusMethod" on "SampleDBusObject" will be

1613

1064

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

1614

1065

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

1615

1066

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

1616

1067

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

1617

1068

1618

1069

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

1619

1070

(from DBusObjectWithProperties) and interfaces (from the

1620

1071

dbus_interface_annotations decorator).

1621

1072

"""

1622

1623

1073

def wrapper(cls):

1624

1074

for orig_interface_name, alt_interface_name in (

1625

alt_interface_names.items()):

1075

alt_interface_names.iteritems()):

1626

1076

attr = {}

1627

1077

interface_names = set()

1628

1078

# Go though all attributes of the class

1630

1080

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

1631

1081

# with the wrong interface name

1632

1082

if (not hasattr(attribute, "_dbus_interface")

1633

or not attribute._dbus_interface.startswith(

1634

orig_interface_name)):

1083

or not attribute._dbus_interface

1084

.startswith(orig_interface_name)):

1635

1085

continue

1636

1086

# Create an alternate D-Bus interface name based on

1637

1087

# the current name

1638

alt_interface = attribute._dbus_interface.replace(

1639

orig_interface_name, alt_interface_name)

1088

alt_interface = (attribute._dbus_interface

1089

.replace(orig_interface_name,

1090

alt_interface_name))

1640

1091

interface_names.add(alt_interface)

1641

1092

# Is this a D-Bus signal?

1642

1093

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

1643

1094

# Extract the original non-method undecorated

1644

1095

# function by black magic

1645

if sys.version_info.major == 2:

1646

nonmethod_func = (dict(

1096

nonmethod_func = (dict(

1647

1097

zip(attribute.func_code.co_freevars,

1648

attribute.__closure__))

1649

["func"].cell_contents)

1650

else:

1651

nonmethod_func = (dict(

1652

zip(attribute.__code__.co_freevars,

1653

attribute.__closure__))

1654

["func"].cell_contents)

1098

attribute.__closure__))["func"]

1099

.cell_contents)

1655

1100

# Create a new, but exactly alike, function

1656

1101

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

1657

1102

# with the alternate D-Bus interface name

1658

new_function = copy_function(nonmethod_func)

1659

new_function = (dbus.service.signal(

1660

alt_interface,

1661

attribute._dbus_signature)(new_function))

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)))

1662

1112

# Copy annotations, if any

1663

1113

try:

1664

new_function._dbus_annotations = dict(

1665

attribute._dbus_annotations)

1114

new_function._dbus_annotations = (

1115

dict(attribute._dbus_annotations))

1666

1116

except AttributeError:

1667

1117

pass

1668

1669

1118

# Define a creator of a function to call both the

1670

1119

# original and alternate functions, so both the

1671

1120

# original and alternate signals gets sent when

1674

1123

"""This function is a scope container to pass

1675

1124

func1 and func2 to the "call_both" function

1676

1125

outside of its arguments"""

1677

1678

@functools.wraps(func2)

1679

1126

def call_both(*args, **kwargs):

1680

1127

"""This function will emit two D-Bus

1681

1128

signals by calling func1 and func2"""

1682

1129

func1(*args, **kwargs)

1683

1130

func2(*args, **kwargs)

1684

# Make wrapper function look like a D-Bus

1685

# signal

1686

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

1687

if name.startswith("_dbus_"):

1688

setattr(call_both, name, attr)

1689

1690

1131

return call_both

1691

1132

# Create the "call_both" function and add it to

1692

1133

# the class

1697

1138

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

1698

1139

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

1699

1140

# to the class.

1700

attr[attrname] = (

1701

dbus.service.method(

1702

alt_interface,

1703

attribute._dbus_in_signature,

1704

attribute._dbus_out_signature)

1705

(copy_function(attribute)))

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)))

1706

1151

# Copy annotations, if any

1707

1152

try:

1708

attr[attrname]._dbus_annotations = dict(

1709

attribute._dbus_annotations)

1153

attr[attrname]._dbus_annotations = (

1154

dict(attribute._dbus_annotations))

1710

1155

except AttributeError:

1711

1156

pass

1712

1157

# Is this a D-Bus property?

1715

1160

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

1716

1161

# property with the alternate D-Bus interface

1717

1162

# name. Add it to the class.

1718

attr[attrname] = (dbus_service_property(

1719

alt_interface, attribute._dbus_signature,

1720

attribute._dbus_access,

1721

attribute._dbus_get_args_options

1722

["byte_arrays"])

1723

(copy_function(attribute)))

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)))

1724

1176

# Copy annotations, if any

1725

1177

try:

1726

attr[attrname]._dbus_annotations = dict(

1727

attribute._dbus_annotations)

1178

attr[attrname]._dbus_annotations = (

1179

dict(attribute._dbus_annotations))

1728

1180

except AttributeError:

1729

1181

pass

1730

1182

# Is this a D-Bus interface?

1733

1185

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

1734

1186

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

1735

1187

# to the class.

1736

attr[attrname] = (

1737

dbus_interface_annotations(alt_interface)

1738

(copy_function(attribute)))

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)))

1739

1196

if deprecate:

1740

1197

# Deprecate all alternate interfaces

1741

iname = "_AlternateDBusNames_interface_annotation{}"

1198

iname="_AlternateDBusNames_interface_annotation{0}"

1742

1199

for interface_name in interface_names:

1743

1744

1200

@dbus_interface_annotations(interface_name)

1745

1201

def func(self):

1746

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

1747

"true"}

1202

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

1203

"true" }

1748

1204

# Find an unused name

1749

1205

for aname in (iname.format(i)

1750

1206

for i in itertools.count()):

1754

1210

if interface_names:

1755

1211

# Replace the class with a new subclass of it with

1756

1212

# methods, signals, etc. as created above.

1757

if sys.version_info.major == 2:

1758

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

1759

(cls, ), attr)

1760

else:

1761

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

1762

(cls, ), attr)

1213

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

1214

(cls,), attr)

1763

1215

return cls

1764

1765

1216

return wrapper

1766

1217

1767

1218

1768

1219

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

1769

"se.bsnet.fukt.Mandos"})

1220

"se.bsnet.fukt.Mandos"})

1770

1221

class ClientDBus(Client, DBusObjectWithProperties):

1771

1222

"""A Client class using D-Bus

1772

1223

1773

1224

Attributes:

1774

1225

dbus_object_path: dbus.ObjectPath

1775

1226

bus: dbus.SystemBus()

1776

1227

"""

1777

1228

1778

1229

runtime_expansions = (Client.runtime_expansions

1779

+ ("dbus_object_path", ))

1780

1781

_interface = "se.recompile.Mandos.Client"

1782

1230

+ ("dbus_object_path",))

1231

1783

1232

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

1784

1785

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

1233

1234

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

1786

1235

self.bus = bus

1787

1236

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

1788

1237

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

1789

1238

# the D-Bus

1790

client_object_name = str(self.name).translate(

1239

client_object_name = unicode(self.name).translate(

1791

1240

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

1792

1241

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

1793

self.dbus_object_path = dbus.ObjectPath(

1794

"/clients/" + client_object_name)

1242

self.dbus_object_path = (dbus.ObjectPath

1243

("/clients/" + client_object_name))

1795

1244

DBusObjectWithProperties.__init__(self, self.bus,

1796

1245

self.dbus_object_path)

1797

1798

def notifychangeproperty(transform_func, dbus_name,

1799

type_func=lambda x: x,

1800

variant_level=1,

1801

invalidate_only=False,

1802

_interface=_interface):

1246

1247

def notifychangeproperty(transform_func,

1248

dbus_name, type_func=lambda x: x,

1249

variant_level=1):

1803

1250

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

1804

1251

its changes to DBus.

1805

1252

1806

1253

transform_fun: Function that takes a value and a variant_level

1807

1254

and transforms it to a D-Bus type.

1808

1255

dbus_name: D-Bus name of the variable

1810

1257

to the D-Bus. Default: no transform

1811

1258

variant_level: D-Bus variant level. Default: 1

1812

1259

"""

1813

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

1814

1260

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

1815

1261

def setter(self, value):

1816

1262

if hasattr(self, "dbus_object_path"):

1817

1263

if (not hasattr(self, attrname) or

1818

1264

type_func(getattr(self, attrname, None))

1819

1265

!= type_func(value)):

1820

if invalidate_only:

1821

self.PropertiesChanged(

1822

_interface, dbus.Dictionary(),

1823

dbus.Array((dbus_name, )))

1824

else:

1825

dbus_value = transform_func(

1826

type_func(value),

1827

variant_level=variant_level)

1828

self.PropertyChanged(dbus.String(dbus_name),

1829

dbus_value)

1830

self.PropertiesChanged(

1831

_interface,

1832

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

1833

dbus_value}),

1834

dbus.Array())

1266

dbus_value = transform_func(type_func(value),

1267

variant_level

1268

=variant_level)

1269

self.PropertyChanged(dbus.String(dbus_name),

1270

dbus_value)

1835

1271

setattr(self, attrname, value)

1836

1272

1837

1273

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

1838

1274

1839

1275

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1840

1276

approvals_pending = notifychangeproperty(dbus.Boolean,

1841

1277

"ApprovalPending",

1842

type_func=bool)

1278

type_func = bool)

1843

1279

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

1844

1280

last_enabled = notifychangeproperty(datetime_to_dbus,

1845

1281

"LastEnabled")

1846

checker = notifychangeproperty(

1847

dbus.Boolean, "CheckerRunning",

1848

type_func=lambda checker: checker is not None)

1282

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

1283

type_func = lambda checker:

1284

checker is not None)

1849

1285

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1850

1286

"LastCheckedOK")

1851

1287

last_checker_status = notifychangeproperty(dbus.Int16,

1854

1290

datetime_to_dbus, "LastApprovalRequest")

1855

1291

approved_by_default = notifychangeproperty(dbus.Boolean,

1856

1292

"ApprovedByDefault")

1857

approval_delay = notifychangeproperty(

1858

dbus.UInt64, "ApprovalDelay",

1859

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

1293

approval_delay = notifychangeproperty(dbus.UInt64,

1294

"ApprovalDelay",

1295

type_func =

1296

timedelta_to_milliseconds)

1860

1297

approval_duration = notifychangeproperty(

1861

1298

dbus.UInt64, "ApprovalDuration",

1862

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

1299

type_func = timedelta_to_milliseconds)

1863

1300

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

1864

timeout = notifychangeproperty(

1865

dbus.UInt64, "Timeout",

1866

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

1301

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

1302

type_func =

1303

timedelta_to_milliseconds)

1867

1304

extended_timeout = notifychangeproperty(

1868

1305

dbus.UInt64, "ExtendedTimeout",

1869

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

1870

interval = notifychangeproperty(

1871

dbus.UInt64, "Interval",

1872

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

1306

type_func = timedelta_to_milliseconds)

1307

interval = notifychangeproperty(dbus.UInt64,

1308

"Interval",

1309

type_func =

1310

timedelta_to_milliseconds)

1873

1311

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

1874

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

1875

invalidate_only=True)

1876

1312

1877

1313

del notifychangeproperty

1878

1314

1879

1315

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

1880

1316

try:

1881

1317

self.remove_from_connection()

1884

1320

if hasattr(DBusObjectWithProperties, "__del__"):

1885

1321

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

1886

1322

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

1887

1888

def checker_callback(self, source, condition,

1889

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

1890

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

1891

connection, command, *args,

1892

**kwargs)

1893

exitstatus = self.last_checker_status

1894

if exitstatus >= 0:

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)

1895

1330

# Emit D-Bus signal

1896

1331

self.CheckerCompleted(dbus.Int16(exitstatus),

1897

# This is specific to GNU libC

1898

dbus.Int64(exitstatus << 8),

1332

dbus.Int64(condition),

1899

1333

dbus.String(command))

1900

1334

else:

1901

1335

# Emit D-Bus signal

1902

1336

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

1903

dbus.Int64(

1904

# This is specific to GNU libC

1905

(exitstatus << 8)

1906

| self.last_checker_signal),

1337

dbus.Int64(condition),

1907

1338

dbus.String(command))

1908

return ret

1909

1339

1340

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

1341

*args, **kwargs)

1342

1910

1343

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

1911

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

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

1912

1349

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

1913

1350

# Only if new checker process was started

1914

1351

if (self.checker is not None

1916

1353

# Emit D-Bus signal

1917

1354

self.CheckerStarted(self.current_checker_command)

1918

1355

return r

1919

1356

1920

1357

def _reset_approved(self):

1921

1358

self.approved = None

1922

1359

return False

1923

1360

1924

1361

def approve(self, value=True):

1925

1362

self.approved = value

1926

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

1927

* 1000), self._reset_approved)

1363

gobject.timeout_add(timedelta_to_milliseconds

1364

(self.approval_duration),

1365

self._reset_approved)

1928

1366

self.send_changedstate()

1929

1930

# D-Bus methods, signals & properties

1931

1932

# Interfaces

1933

1934

# Signals

1935

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

1936

1380

# CheckerCompleted - signal

1937

1381

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

1938

1382

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

1939

1383

"D-Bus signal"

1940

1384

pass

1941

1385

1942

1386

# CheckerStarted - signal

1943

1387

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

1944

1388

def CheckerStarted(self, command):

1945

1389

"D-Bus signal"

1946

1390

pass

1947

1391

1948

1392

# PropertyChanged - signal

1949

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

1950

1393

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

1951

1394

def PropertyChanged(self, property, value):

1952

1395

"D-Bus signal"

1953

1396

pass

1954

1397

1955

1398

# GotSecret - signal

1956

1399

@dbus.service.signal(_interface)

1957

1400

def GotSecret(self):

1960

1403

server to mandos-client

1961

1404

"""

1962

1405

pass

1963

1406

1964

1407

# Rejected - signal

1965

1408

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

1966

1409

def Rejected(self, reason):

1967

1410

"D-Bus signal"

1968

1411

pass

1969

1412

1970

1413

# NeedApproval - signal

1971

1414

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

1972

1415

def NeedApproval(self, timeout, default):

1973

1416

"D-Bus signal"

1974

1417

return self.need_approval()

1975

1976

# Methods

1977

1418

1419

## Methods

1420

1978

1421

# Approve - method

1979

1422

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

1980

1423

def Approve(self, value):

1981

1424

self.approve(value)

1982

1425

1983

1426

# CheckedOK - method

1984

1427

@dbus.service.method(_interface)

1985

1428

def CheckedOK(self):

1986

1429

self.checked_ok()

1987

1430

1988

1431

# Enable - method

1989

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

1990

1432

@dbus.service.method(_interface)

1991

1433

def Enable(self):

1992

1434

"D-Bus method"

1993

1435

self.enable()

1994

1436

1995

1437

# StartChecker - method

1996

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

1997

1438

@dbus.service.method(_interface)

1998

1439

def StartChecker(self):

1999

1440

"D-Bus method"

2000

1441

self.start_checker()

2001

1442

2002

1443

# Disable - method

2003

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

2004

1444

@dbus.service.method(_interface)

2005

1445

def Disable(self):

2006

1446

"D-Bus method"

2007

1447

self.disable()

2008

1448

2009

1449

# StopChecker - method

2010

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

2011

1450

@dbus.service.method(_interface)

2012

1451

def StopChecker(self):

2013

1452

self.stop_checker()

2014

2015

# Properties

2016

1453

1454

## Properties

1455

2017

1456

# ApprovalPending - property

2018

1457

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

2019

1458

def ApprovalPending_dbus_property(self):

2020

1459

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

2021

1460

2022

1461

# ApprovedByDefault - property

2023

@dbus_service_property(_interface,

2024

signature="b",

1462

@dbus_service_property(_interface, signature="b",

2025

1463

access="readwrite")

2026

1464

def ApprovedByDefault_dbus_property(self, value=None):

2027

1465

if value is None: # get

2028

1466

return dbus.Boolean(self.approved_by_default)

2029

1467

self.approved_by_default = bool(value)

2030

1468

2031

1469

# ApprovalDelay - property

2032

@dbus_service_property(_interface,

2033

signature="t",

1470

@dbus_service_property(_interface, signature="t",

2034

1471

access="readwrite")

2035

1472

def ApprovalDelay_dbus_property(self, value=None):

2036

1473

if value is None: # get

2037

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

2038

* 1000)

1474

return dbus.UInt64(self.approval_delay_milliseconds())

2039

1475

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

2040

1476

2041

1477

# ApprovalDuration - property

2042

@dbus_service_property(_interface,

2043

signature="t",

1478

@dbus_service_property(_interface, signature="t",

2044

1479

access="readwrite")

2045

1480

def ApprovalDuration_dbus_property(self, value=None):

2046

1481

if value is None: # get

2047

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

2048

* 1000)

1482

return dbus.UInt64(timedelta_to_milliseconds(

1483

self.approval_duration))

2049

1484

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

2050

1485

2051

1486

# Name - property

2052

@dbus_annotations(

2053

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

2054

1487

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

2055

1488

def Name_dbus_property(self):

2056

1489

return dbus.String(self.name)

2057

2058

# KeyID - property

2059

@dbus_annotations(

2060

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

2061

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

2062

def KeyID_dbus_property(self):

2063

return dbus.String(self.key_id)

2064

1490

2065

1491

# Fingerprint - property

2066

@dbus_annotations(

2067

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

2068

1492

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

2069

1493

def Fingerprint_dbus_property(self):

2070

1494

return dbus.String(self.fingerprint)

2071

1495

2072

1496

# Host - property

2073

@dbus_service_property(_interface,

2074

signature="s",

1497

@dbus_service_property(_interface, signature="s",

2075

1498

access="readwrite")

2076

1499

def Host_dbus_property(self, value=None):

2077

1500

if value is None: # get

2078

1501

return dbus.String(self.host)

2079

self.host = str(value)

2080

1502

self.host = unicode(value)

1503

2081

1504

# Created - property

2082

@dbus_annotations(

2083

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

2084

1505

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

2085

1506

def Created_dbus_property(self):

2086

1507

return datetime_to_dbus(self.created)

2087

1508

2088

1509

# LastEnabled - property

2089

1510

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

2090

1511

def LastEnabled_dbus_property(self):

2091

1512

return datetime_to_dbus(self.last_enabled)

2092

1513

2093

1514

# Enabled - property

2094

@dbus_service_property(_interface,

2095

signature="b",

1515

@dbus_service_property(_interface, signature="b",

2096

1516

access="readwrite")

2097

1517

def Enabled_dbus_property(self, value=None):

2098

1518

if value is None: # get

2101

1521

self.enable()

2102

1522

else:

2103

1523

self.disable()

2104

1524

2105

1525

# LastCheckedOK - property

2106

@dbus_service_property(_interface,

2107

signature="s",

1526

@dbus_service_property(_interface, signature="s",

2108

1527

access="readwrite")

2109

1528

def LastCheckedOK_dbus_property(self, value=None):

2110

1529

if value is not None:

2111

1530

self.checked_ok()

2112

1531

return

2113

1532

return datetime_to_dbus(self.last_checked_ok)

2114

1533

2115

1534

# LastCheckerStatus - property

2116

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

1535

@dbus_service_property(_interface, signature="n",

1536

access="read")

2117

1537

def LastCheckerStatus_dbus_property(self):

2118

1538

return dbus.Int16(self.last_checker_status)

2119

1539

2120

1540

# Expires - property

2121

1541

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

2122

1542

def Expires_dbus_property(self):

2123

1543

return datetime_to_dbus(self.expires)

2124

1544

2125

1545

# LastApprovalRequest - property

2126

1546

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

2127

1547

def LastApprovalRequest_dbus_property(self):

2128

1548

return datetime_to_dbus(self.last_approval_request)

2129

1549

2130

1550

# Timeout - property

2131

@dbus_service_property(_interface,

2132

signature="t",

1551

@dbus_service_property(_interface, signature="t",

2133

1552

access="readwrite")

2134

1553

def Timeout_dbus_property(self, value=None):

2135

1554

if value is None: # get

2136

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

1555

return dbus.UInt64(self.timeout_milliseconds())

2137

1556

old_timeout = self.timeout

2138

1557

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

2139

1558

# Reschedule disabling

2147

1566

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

2148

1567

is None):

2149

1568

return

2150

GLib.source_remove(self.disable_initiator_tag)

2151

self.disable_initiator_tag = GLib.timeout_add(

2152

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

2153

self.disable)

2154

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

2155

1575

# ExtendedTimeout - property

2156

@dbus_service_property(_interface,

2157

signature="t",

1576

@dbus_service_property(_interface, signature="t",

2158

1577

access="readwrite")

2159

1578

def ExtendedTimeout_dbus_property(self, value=None):

2160

1579

if value is None: # get

2161

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

2162

* 1000)

1580

return dbus.UInt64(self.extended_timeout_milliseconds())

2163

1581

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

2164

1582

2165

1583

# Interval - property

2166

@dbus_service_property(_interface,

2167

signature="t",

1584

@dbus_service_property(_interface, signature="t",

2168

1585

access="readwrite")

2169

1586

def Interval_dbus_property(self, value=None):

2170

1587

if value is None: # get

2171

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

1588

return dbus.UInt64(self.interval_milliseconds())

2172

1589

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

2173

1590

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

2174

1591

return

2175

1592

if self.enabled:

2176

1593

# Reschedule checker run

2177

GLib.source_remove(self.checker_initiator_tag)

2178

self.checker_initiator_tag = GLib.timeout_add(

2179

value, self.start_checker)

2180

self.start_checker() # Start one now, too

2181

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

2182

1599

# Checker - property

2183

@dbus_service_property(_interface,

2184

signature="s",

1600

@dbus_service_property(_interface, signature="s",

2185

1601

access="readwrite")

2186

1602

def Checker_dbus_property(self, value=None):

2187

1603

if value is None: # get

2188

1604

return dbus.String(self.checker_command)

2189

self.checker_command = str(value)

2190

1605

self.checker_command = unicode(value)

1606

2191

1607

# CheckerRunning - property

2192

@dbus_service_property(_interface,

2193

signature="b",

1608

@dbus_service_property(_interface, signature="b",

2194

1609

access="readwrite")

2195

1610

def CheckerRunning_dbus_property(self, value=None):

2196

1611

if value is None: # get

2199

1614

self.start_checker()

2200

1615

else:

2201

1616

self.stop_checker()

2202

1617

2203

1618

# ObjectPath - property

2204

@dbus_annotations(

2205

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

2206

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

2207

1619

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

2208

1620

def ObjectPath_dbus_property(self):

2209

return self.dbus_object_path # is already a dbus.ObjectPath

2210

1621

return self.dbus_object_path # is already a dbus.ObjectPath

1622

2211

1623

# Secret = property

2212

@dbus_annotations(

2213

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

2214

"invalidates"})

2215

@dbus_service_property(_interface,

2216

signature="ay",

2217

access="write",

2218

byte_arrays=True)

1624

@dbus_service_property(_interface, signature="ay",

1625

access="write", byte_arrays=True)

2219

1626

def Secret_dbus_property(self, value):

2220

self.secret = bytes(value)

2221

1627

self.secret = str(value)

1628

2222

1629

del _interface

2223

1630

2224

1631

2225

class ProxyClient:

2226

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

1632

class ProxyClient(object):

1633

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

2227

1634

self._pipe = child_pipe

2228

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

1635

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

2229

1636

if not self._pipe.recv():

2230

raise KeyError(key_id or fpr)

2231

1637

raise KeyError()

1638

2232

1639

def __getattribute__(self, name):

2233

1640

if name == '_pipe':

2234

1641

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

2237

1644

if data[0] == 'data':

2238

1645

return data[1]

2239

1646

if data[0] == 'function':

2240

2241

1647

def func(*args, **kwargs):

2242

1648

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

2243

1649

return self._pipe.recv()[1]

2244

2245

1650

return func

2246

1651

2247

1652

def __setattr__(self, name, value):

2248

1653

if name == '_pipe':

2249

1654

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

2252

1657

2253

1658

class ClientHandler(socketserver.BaseRequestHandler, object):

2254

1659

"""A class to handle client connections.

2255

1660

2256

1661

Instantiated once for each connection to handle it.

2257

1662

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

2258

1663

2259

1664

def handle(self):

2260

1665

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

2261

1666

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

2262

str(self.client_address))

1667

unicode(self.client_address))

2263

1668

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

2264

1669

self.server.child_pipe.fileno())

2265

2266

session = gnutls.ClientSession(self.request)

2267

2268

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

2269

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

2270

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

2271

# "+DHE-DSS"))

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"))

2272

1685

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

2273

1686

priority = self.server.gnutls_priority

2274

1687

if priority is None:

2275

1688

priority = "NORMAL"

2276

gnutls.priority_set_direct(session._c_object,

2277

priority.encode("utf-8"),

2278

None)

2279

1689

(gnutls.library.functions

1690

.gnutls_priority_set_direct(session._c_object,

1691

priority, None))

1692

2280

1693

# Start communication using the Mandos protocol

2281

1694

# Get protocol number

2282

1695

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

2283

1696

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

2284

1697

try:

2285

1698

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

2286

raise RuntimeError(line)

1699

raise RuntimeError

2287

1700

except (ValueError, IndexError, RuntimeError) as error:

2288

1701

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

2289

1702

return

2290

1703

2291

1704

# Start GnuTLS connection

2292

1705

try:

2293

1706

session.handshake()

2294

except gnutls.Error as error:

1707

except gnutls.errors.GNUTLSError as error:

2295

1708

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

2296

1709

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

2297

1710

# established. Just abandon the request.

2298

1711

return

2299

1712

logger.debug("Handshake succeeded")

2300

1713

2301

1714

approval_required = False

2302

1715

try:

2303

if gnutls.has_rawpk:

2304

fpr = b""

2305

try:

2306

key_id = self.key_id(

2307

self.peer_certificate(session))

2308

except (TypeError, gnutls.Error) as error:

2309

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

2310

return

2311

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

2312

2313

else:

2314

key_id = b""

2315

try:

2316

fpr = self.fingerprint(

2317

self.peer_certificate(session))

2318

except (TypeError, gnutls.Error) as error:

2319

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

2320

return

2321

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

2322

2323

try:

2324

client = ProxyClient(child_pipe, key_id, fpr,

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,

2325

1727

self.client_address)

2326

1728

except KeyError:

2327

1729

return

2328

1730

2329

1731

if client.approval_delay:

2330

1732

delay = client.approval_delay

2331

1733

client.approvals_pending += 1

2332

1734

approval_required = True

2333

1735

2334

1736

while True:

2335

1737

if not client.enabled:

2336

1738

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

2337

client.name)

1739

client.name)

2338

1740

if self.server.use_dbus:

2339

1741

# Emit D-Bus signal

2340

1742

client.Rejected("Disabled")

2341

1743

return

2342

1744

2343

1745

if client.approved or not client.approval_delay:

2344

# We are approved or approval is disabled

1746

#We are approved or approval is disabled

2345

1747

break

2346

1748

elif client.approved is None:

2347

1749

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

2349

1751

if self.server.use_dbus:

2350

1752

# Emit D-Bus signal

2351

1753

client.NeedApproval(

2352

client.approval_delay.total_seconds()

2353

* 1000, client.approved_by_default)

1754

client.approval_delay_milliseconds(),

1755

client.approved_by_default)

2354

1756

else:

2355

1757

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

2356

1758

client.name)

2358

1760

# Emit D-Bus signal

2359

1761

client.Rejected("Denied")

2360

1762

return

2361

2362

# wait until timeout or approved

1763

1764

#wait until timeout or approved

2363

1765

time = datetime.datetime.now()

2364

1766

client.changedstate.acquire()

2365

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

1767

client.changedstate.wait(

1768

float(timedelta_to_milliseconds(delay)

1769

/ 1000))

2366

1770

client.changedstate.release()

2367

1771

time2 = datetime.datetime.now()

2368

1772

if (time2 - time) >= delay:

2378

1782

break

2379

1783

else:

2380

1784

delay -= time2 - time

2381

2382

try:

2383

session.send(client.secret)

2384

except gnutls.Error as error:

2385

logger.warning("gnutls send failed",

2386

exc_info=error)

2387

return

2388

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

2389

1799

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

2390

1800

# bump the timeout using extended_timeout

2391

1801

client.bump_timeout(client.extended_timeout)

2392

1802

if self.server.use_dbus:

2393

1803

# Emit D-Bus signal

2394

1804

client.GotSecret()

2395

1805

2396

1806

finally:

2397

1807

if approval_required:

2398

1808

client.approvals_pending -= 1

2399

1809

try:

2400

1810

session.bye()

2401

except gnutls.Error as error:

1811

except gnutls.errors.GNUTLSError as error:

2402

1812

logger.warning("GnuTLS bye failed",

2403

1813

exc_info=error)

2404

1814

2405

1815

@staticmethod

2406

1816

def peer_certificate(session):

2407

"Return the peer's certificate as a bytestring"

2408

try:

2409

cert_type = gnutls.certificate_type_get2(session._c_object,

2410

gnutls.CTYPE_PEERS)

2411

except AttributeError:

2412

cert_type = gnutls.certificate_type_get(session._c_object)

2413

if gnutls.has_rawpk:

2414

valid_cert_types = frozenset((gnutls.CRT_RAWPK,))

2415

else:

2416

valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))

2417

# If not a valid certificate type...

2418

if cert_type not in valid_cert_types:

2419

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

2420

valid_cert_types)

2421

# ...return invalid data

2422

return b""

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

2423

1824

list_size = ctypes.c_uint(1)

2424

cert_list = (gnutls.certificate_get_peers

1825

cert_list = (gnutls.library.functions

1826

.gnutls_certificate_get_peers

2425

1827

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

2426

1828

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

2427

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

1829

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

1830

" certificate")

2428

1831

if list_size.value == 0:

2429

1832

return None

2430

1833

cert = cert_list[0]

2431

1834

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

2432

2433

@staticmethod

2434

def key_id(certificate):

2435

"Convert a certificate bytestring to a hexdigit key ID"

2436

# New GnuTLS "datum" with the public key

2437

datum = gnutls.datum_t(

2438

ctypes.cast(ctypes.c_char_p(certificate),

2439

ctypes.POINTER(ctypes.c_ubyte)),

2440

ctypes.c_uint(len(certificate)))

2441

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

2442

# New empty GnuTLS certificate

2443

pubkey = gnutls.pubkey_t()

2444

gnutls.pubkey_init(ctypes.byref(pubkey))

2445

# Import the raw public key into the certificate

2446

gnutls.pubkey_import(pubkey,

2447

ctypes.byref(datum),

2448

gnutls.X509_FMT_DER)

2449

# New buffer for the key ID

2450

buf = ctypes.create_string_buffer(32)

2451

buf_len = ctypes.c_size_t(len(buf))

2452

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

2453

gnutls.pubkey_get_key_id(pubkey,

2454

gnutls.KEYID_USE_SHA256,

2455

ctypes.cast(ctypes.byref(buf),

2456

ctypes.POINTER(ctypes.c_ubyte)),

2457

ctypes.byref(buf_len))

2458

# Deinit the certificate

2459

gnutls.pubkey_deinit(pubkey)

2460

2461

# Convert the buffer to a Python bytestring

2462

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

2463

# Convert the bytestring to hexadecimal notation

2464

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

2465

return hex_key_id

2466

1835

2467

1836

@staticmethod

2468

1837

def fingerprint(openpgp):

2469

1838

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

2470

1839

# New GnuTLS "datum" with the OpenPGP public key

2471

datum = gnutls.datum_t(

2472

ctypes.cast(ctypes.c_char_p(openpgp),

2473

ctypes.POINTER(ctypes.c_ubyte)),

2474

ctypes.c_uint(len(openpgp)))

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))))

2475

1845

# New empty GnuTLS certificate

2476

crt = gnutls.openpgp_crt_t()

2477

gnutls.openpgp_crt_init(ctypes.byref(crt))

1846

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1847

(gnutls.library.functions

1848

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2478

1849

# Import the OpenPGP public key into the certificate

2479

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

2480

gnutls.OPENPGP_FMT_RAW)

1850

(gnutls.library.functions

1851

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

1852

gnutls.library.constants

1853

.GNUTLS_OPENPGP_FMT_RAW))

2481

1854

# Verify the self signature in the key

2482

1855

crtverify = ctypes.c_uint()

2483

gnutls.openpgp_crt_verify_self(crt, 0,

2484

ctypes.byref(crtverify))

1856

(gnutls.library.functions

1857

.gnutls_openpgp_crt_verify_self(crt, 0,

1858

ctypes.byref(crtverify)))

2485

1859

if crtverify.value != 0:

2486

gnutls.openpgp_crt_deinit(crt)

2487

raise gnutls.CertificateSecurityError(code

2488

=crtverify.value)

1860

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1861

raise (gnutls.errors.CertificateSecurityError

1862

("Verify failed"))

2489

1863

# New buffer for the fingerprint

2490

1864

buf = ctypes.create_string_buffer(20)

2491

1865

buf_len = ctypes.c_size_t()

2492

1866

# Get the fingerprint from the certificate into the buffer

2493

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

2494

ctypes.byref(buf_len))

1867

(gnutls.library.functions

1868

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

1869

ctypes.byref(buf_len)))

2495

1870

# Deinit the certificate

2496

gnutls.openpgp_crt_deinit(crt)

1871

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2497

1872

# Convert the buffer to a Python bytestring

2498

1873

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

2499

1874

# Convert the bytestring to hexadecimal notation

2501

1876

return hex_fpr

2502

1877

2503

1878

2504

class MultiprocessingMixIn:

1879

class MultiprocessingMixIn(object):

2505

1880

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

2506

2507

1881

def sub_process_main(self, request, address):

2508

1882

try:

2509

1883

self.finish_request(request, address)

2510

1884

except Exception:

2511

1885

self.handle_error(request, address)

2512

1886

self.close_request(request)

2513

1887

2514

1888

def process_request(self, request, address):

2515

1889

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

2516

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

2517

args=(request, address))

1890

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

1891

args = (request, address))

2518

1892

proc.start()

2519

1893

return proc

2520

1894

2521

1895

2522

class MultiprocessingMixInWithPipe(MultiprocessingMixIn):

1896

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2523

1897

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

2524

2525

1898

def process_request(self, request, client_address):

2526

1899

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

2527

1900

2528

1901

This function creates a new pipe in self.pipe

2529

1902

"""

2530

1903

parent_pipe, self.child_pipe = multiprocessing.Pipe()

2531

1904

2532

1905

proc = MultiprocessingMixIn.process_request(self, request,

2533

1906

client_address)

2534

1907

self.child_pipe.close()

2535

1908

self.add_pipe(parent_pipe, proc)

2536

1909

2537

1910

def add_pipe(self, parent_pipe, proc):

2538

1911

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

2539

raise NotImplementedError()

1912

raise NotImplementedError

2540

1913

2541

1914

2542

1915

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2543

socketserver.TCPServer):

1916

socketserver.TCPServer, object):

2544

1917

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

2545

1918

2546

1919

Attributes:

2547

1920

enabled: Boolean; whether this server is activated yet

2548

1921

interface: None or a network interface name (string)

2549

1922

use_ipv6: Boolean; to use IPv6 or not

2550

1923

"""

2551

2552

1924

def __init__(self, server_address, RequestHandlerClass,

2553

interface=None,

2554

use_ipv6=True,

2555

socketfd=None):

1925

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

2556

1926

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

2557

1927

creating a new one with socket.socket().

2558

1928

"""

2564

1934

self.socketfd = socketfd

2565

1935

# Save the original socket.socket() function

2566

1936

self.socket_socket = socket.socket

2567

2568

1937

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

2569

#

1938

#

2570

1939

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

2571

1940

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

2572

1941

# patching socket.socket.)

2573

#

1942

#

2574

1943

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

2575

1944

@functools.wraps(socket.socket)

2576

1945

def socket_wrapper(*args, **kwargs):

2588

1957

# socket_wrapper(), if socketfd was set.

2589

1958

socketserver.TCPServer.__init__(self, server_address,

2590

1959

RequestHandlerClass)

2591

1960

2592

1961

def server_bind(self):

2593

1962

"""This overrides the normal server_bind() function

2594

1963

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

2595

1964

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

2596

global SO_BINDTODEVICE

2597

1965

if self.interface is not None:

2598

1966

if SO_BINDTODEVICE is None:

2599

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

2600

# common enough.

2601

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

2602

SO_BINDTODEVICE = 25

2603

try:

2604

self.socket.setsockopt(

2605

socket.SOL_SOCKET, SO_BINDTODEVICE,

2606

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

2607

except socket.error as error:

2608

if error.errno == errno.EPERM:

2609

logger.error("No permission to bind to"

2610

" interface %s", self.interface)

2611

elif error.errno == errno.ENOPROTOOPT:

2612

logger.error("SO_BINDTODEVICE not available;"

2613

" cannot bind to interface %s",

2614

self.interface)

2615

elif error.errno == errno.ENODEV:

2616

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

2617

" cannot bind", self.interface)

2618

else:

2619

raise

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

2620

1988

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

2621

1989

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

2622

if self.server_address[1]:

2623

self.allow_reuse_address = True

2624

1990

if not self.server_address[0]:

2625

1991

if self.address_family == socket.AF_INET6:

2626

any_address = "::" # in6addr_any

1992

any_address = "::" # in6addr_any

2627

1993

else:

2628

any_address = "0.0.0.0" # INADDR_ANY

1994

any_address = "0.0.0.0" # INADDR_ANY

2629

1995

self.server_address = (any_address,

2630

1996

self.server_address[1])

2631

1997

elif not self.server_address[1]:

2632

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

1998

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

1999

0)

2633

2000

# if self.interface:

2634

2001

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

2635

2002

# 0, # port

2641

2008

2642

2009

class MandosServer(IPv6_TCPServer):

2643

2010

"""Mandos server.

2644

2011

2645

2012

Attributes:

2646

2013

clients: set of Client objects

2647

2014

gnutls_priority GnuTLS priority string

2648

2015

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

2649

2650

Assumes a GLib.MainLoop event loop.

2016

2017

Assumes a gobject.MainLoop event loop.

2651

2018

"""

2652

2653

2019

def __init__(self, server_address, RequestHandlerClass,

2654

interface=None,

2655

use_ipv6=True,

2656

clients=None,

2657

gnutls_priority=None,

2658

use_dbus=True,

2659

socketfd=None):

2020

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

2021

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

2660

2022

self.enabled = False

2661

2023

self.clients = clients

2662

2024

if self.clients is None:

2665

2027

self.gnutls_priority = gnutls_priority

2666

2028

IPv6_TCPServer.__init__(self, server_address,

2667

2029

RequestHandlerClass,

2668

interface=interface,

2669

use_ipv6=use_ipv6,

2670

socketfd=socketfd)

2671

2030

interface = interface,

2031

use_ipv6 = use_ipv6,

2032

socketfd = socketfd)

2672

2033

def server_activate(self):

2673

2034

if self.enabled:

2674

2035

return socketserver.TCPServer.server_activate(self)

2675

2036

2676

2037

def enable(self):

2677

2038

self.enabled = True

2678

2039

2679

2040

def add_pipe(self, parent_pipe, proc):

2680

2041

# Call "handle_ipc" for both data and EOF events

2681

GLib.io_add_watch(

2682

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

2683

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

2684

functools.partial(self.handle_ipc,

2685

parent_pipe=parent_pipe,

2686

proc=proc))

2687

2688

def handle_ipc(self, source, condition,

2689

parent_pipe=None,

2690

proc=None,

2691

client_object=None):

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):

2692

2051

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

2693

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

2052

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

2694

2053

# Wait for other process to exit

2695

2054

proc.join()

2696

2055

return False

2697

2056

2698

2057

# Read a request from the child

2699

2058

request = parent_pipe.recv()

2700

2059

command = request[0]

2701

2060

2702

2061

if command == 'init':

2703

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

2704

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

2705

address = request[3]

2706

2707

for c in self.clients.values():

2708

if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":

2709

continue

2710

if key_id and c.key_id == key_id:

2711

client = c

2712

break

2713

if fpr and c.fingerprint == fpr:

2062

fpr = request[1]

2063

address = request[2]

2064

2065

for c in self.clients.itervalues():

2066

if c.fingerprint == fpr:

2714

2067

client = c

2715

2068

break

2716

2069

else:

2717

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

2718

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

2070

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

2071

"dress: %s", fpr, address)

2719

2072

if self.use_dbus:

2720

2073

# Emit D-Bus signal

2721

mandos_dbus_service.ClientNotFound(key_id or fpr,

2074

mandos_dbus_service.ClientNotFound(fpr,

2722

2075

address[0])

2723

2076

parent_pipe.send(False)

2724

2077

return False

2725

2726

GLib.io_add_watch(

2727

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

2728

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

2729

functools.partial(self.handle_ipc,

2730

parent_pipe=parent_pipe,

2731

proc=proc,

2732

client_object=client))

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))

2733

2087

parent_pipe.send(True)

2734

2088

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

2735

2089

# same fileno

2738

2092

funcname = request[1]

2739

2093

args = request[2]

2740

2094

kwargs = request[3]

2741

2095

2742

2096

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

2743

2097

funcname)(*args,

2744

**kwargs)))

2745

2098

**kwargs)))

2099

2746

2100

if command == 'getattr':

2747

2101

attrname = request[1]

2748

if isinstance(client_object.__getattribute__(attrname),

2749

collections.Callable):

2750

parent_pipe.send(('function', ))

2102

if callable(client_object.__getattribute__(attrname)):

2103

parent_pipe.send(('function',))

2751

2104

else:

2752

parent_pipe.send((

2753

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

2754

2105

parent_pipe.send(('data', client_object

2106

.__getattribute__(attrname)))

2107

2755

2108

if command == 'setattr':

2756

2109

attrname = request[1]

2757

2110

value = request[2]

2758

2111

setattr(client_object, attrname, value)

2759

2112

2760

2113

return True

2761

2114

2762

2115

2763

2116

def rfc3339_duration_to_delta(duration):

2764

2117

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

2765

2766

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

2767

True

2768

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

2769

True

2770

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

2771

True

2772

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

2773

True

2774

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

2775

True

2776

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

2777

True

2778

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

2779

True

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)

2780

2133

"""

2781

2134

2782

2135

# Parsing an RFC 3339 duration with regular expressions is not

2783

2136

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

2784

2137

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

2785

2138

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

2786

2139

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

2787

2140

# avoid excessive use of external libraries.

2788

2141

2789

2142

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

2790

Token = collections.namedtuple("Token", (

2791

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

2792

# a "group" containing digits

2793

"value", # datetime.timedelta or None

2794

"followers")) # Tokens valid after this token

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

2795

2152

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

2796

2153

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

2797

2154

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

2798

2155

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

2799

2156

datetime.timedelta(seconds=1),

2800

frozenset((token_end, )))

2157

frozenset((token_end,)))

2801

2158

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

2802

2159

datetime.timedelta(minutes=1),

2803

2160

frozenset((token_second, token_end)))

2819

2176

frozenset((token_month, token_end)))

2820

2177

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

2821

2178

datetime.timedelta(weeks=1),

2822

frozenset((token_end, )))

2179

frozenset((token_end,)))

2823

2180

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

2824

2181

frozenset((token_year, token_month,

2825

2182

token_day, token_time,

2826

token_week)))

2827

# Define starting values:

2828

# Value so far

2829

value = datetime.timedelta()

2183

token_week))),

2184

# Define starting values

2185

value = datetime.timedelta() # Value so far

2830

2186

found_token = None

2831

# Following valid tokens

2832

followers = frozenset((token_duration, ))

2833

# String left to parse

2834

s = duration

2187

followers = frozenset(token_duration,) # Following valid tokens

2188

s = duration # String left to parse

2835

2189

# Loop until end token is found

2836

2190

while found_token is not token_end:

2837

2191

# Search for any currently valid tokens

2853

2207

break

2854

2208

else:

2855

2209

# No currently valid tokens were found

2856

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

2857

.format(duration))

2210

raise ValueError("Invalid RFC 3339 duration")

2858

2211

# End token found

2859

2212

return value

2860

2213

2861

2214

2862

2215

def string_to_delta(interval):

2863

2216

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

2864

2865

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

2866

True

2867

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

2868

True

2869

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

2870

True

2871

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

2872

True

2873

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

2874

True

2875

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

2876

True

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)

2877

2230

"""

2878

2231

2879

2232

try:

2880

2233

return rfc3339_duration_to_delta(interval)

2881

2234

except ValueError:

2882

2235

pass

2883

2236

2884

2237

timevalue = datetime.timedelta(0)

2885

2238

for s in interval.split():

2886

2239

try:

2887

suffix = s[-1]

2240

suffix = unicode(s[-1])

2888

2241

value = int(s[:-1])

2889

2242

if suffix == "d":

2890

2243

delta = datetime.timedelta(value)

2897

2250

elif suffix == "w":

2898

2251

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

2899

2252

else:

2900

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

2901

except IndexError as e:

2253

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

2254

.format(suffix))

2255

except (ValueError, IndexError) as e:

2902

2256

raise ValueError(*(e.args))

2903

2257

timevalue += delta

2904

2258

return timevalue

2905

2259

2906

2260

2907

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

2261

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

2908

2262

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

2909

2263

2910

2264

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

2911

2265

if os.fork():

2912

2266

sys.exit()

2920

2274

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

2921

2275

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

2922

2276

raise OSError(errno.ENODEV,

2923

"{} not a character device"

2277

"{0} not a character device"

2924

2278

.format(os.devnull))

2925

2279

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

2926

2280

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

2930

2284

2931

2285

2932

2286

def main():

2933

2287

2934

2288

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

2935

2289

# Parsing of options, both command line and config file

2936

2290

2937

2291

parser = argparse.ArgumentParser()

2938

2292

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

2939

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

2293

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

2940

2294

help="show version number and exit")

2941

2295

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

2942

2296

help="Bind to interface IF")

2975

2329

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

2976

2330

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

2977

2331

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

2978

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

2979

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

2980

default=None)

2981

2332

2982

2333

options = parser.parse_args()

2983

2334

2335

if options.check:

2336

import doctest

2337

doctest.testmod()

2338

sys.exit()

2339

2984

2340

# Default values for config file for server-global settings

2985

if gnutls.has_rawpk:

2986

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

2987

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

2988

else:

2989

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

2990

":+SIGN-DSA-SHA256")

2991

server_defaults = {"interface": "",

2992

"address": "",

2993

"port": "",

2994

"debug": "False",

2995

"priority": priority,

2996

"servicename": "Mandos",

2997

"use_dbus": "True",

2998

"use_ipv6": "True",

2999

"debuglevel": "",

3000

"restore": "True",

3001

"socket": "",

3002

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

3003

"foreground": "False",

3004

"zeroconf": "True",

3005

}

3006

del priority

3007

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

3008

2357

# Parse config file for server-global settings

3009

server_config = configparser.ConfigParser(server_defaults)

2358

server_config = configparser.SafeConfigParser(server_defaults)

3010

2359

del server_defaults

3011

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

3012

# Convert the ConfigParser object to a dict

2360

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

2361

"mandos.conf"))

2362

# Convert the SafeConfigParser object to a dict

3013

2363

server_settings = server_config.defaults()

3014

2364

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

3015

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

3016

"foreground", "zeroconf"):

2365

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

3017

2366

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

3018

2367

option)

3019

2368

if server_settings["port"]:

3029

2378

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

3030

2379

["socket"])

3031

2380

del server_config

3032

2381

3033

2382

# Override the settings from the config file with command line

3034

2383

# options, if set.

3035

2384

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

3036

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

3037

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

3038

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

2385

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

2386

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

2387

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

3039

2388

value = getattr(options, option)

3040

2389

if value is not None:

3041

2390

server_settings[option] = value

3042

2391

del options

3043

2392

# Force all strings to be unicode

3044

2393

for option in server_settings.keys():

3045

if isinstance(server_settings[option], bytes):

3046

server_settings[option] = (server_settings[option]

3047

.decode("utf-8"))

2394

if type(server_settings[option]) is str:

2395

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

3048

2396

# Force all boolean options to be boolean

3049

2397

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

3050

"foreground", "zeroconf"):

2398

"foreground"):

3051

2399

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

3052

2400

# Debug implies foreground

3053

2401

if server_settings["debug"]:

3054

2402

server_settings["foreground"] = True

3055

2403

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

3056

2404

3057

2405

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

3058

3059

if (not server_settings["zeroconf"]

3060

and not (server_settings["port"]

3061

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

3062

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

3063

2406

3064

2407

# For convenience

3065

2408

debug = server_settings["debug"]

3066

2409

debuglevel = server_settings["debuglevel"]

3069

2412

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

3070

2413

stored_state_file)

3071

2414

foreground = server_settings["foreground"]

3072

zeroconf = server_settings["zeroconf"]

3073

2415

3074

2416

if debug:

3075

2417

initlogger(debug, logging.DEBUG)

3076

2418

else:

3079

2421

else:

3080

2422

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

3081

2423

initlogger(debug, level)

3082

2424

3083

2425

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

3084

syslogger.setFormatter(

3085

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

3086

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

3087

server_settings["servicename"])))

3088

2426

syslogger.setFormatter(logging.Formatter

2427

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

2428

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

2429

.format(server_settings

2430

["servicename"])))

2431

3089

2432

# Parse config file with clients

3090

client_config = configparser.ConfigParser(Client.client_defaults)

2433

client_config = configparser.SafeConfigParser(Client

2434

.client_defaults)

3091

2435

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

3092

2436

"clients.conf"))

3093

2437

3094

2438

global mandos_dbus_service

3095

2439

mandos_dbus_service = None

3096

3097

socketfd = None

3098

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

3099

socketfd = server_settings["socket"]

3100

tcp_server = MandosServer(

3101

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

3102

ClientHandler,

3103

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

3104

use_ipv6=use_ipv6,

3105

gnutls_priority=server_settings["priority"],

3106

use_dbus=use_dbus,

3107

socketfd=socketfd)

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))

3108

2452

if not foreground:

3109

2453

pidfilename = "/run/mandos.pid"

3110

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

3111

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

3112

2454

pidfile = None

3113

2455

try:

3114

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

2456

pidfile = open(pidfilename, "w")

3115

2457

except IOError as e:

3116

2458

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

3117

2459

exc_info=e)

3118

3119

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

3120

("mandos", "mandos"),

3121

("nobody", "nogroup")):

2460

2461

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

3122

2462

try:

3123

2463

uid = pwd.getpwnam(name).pw_uid

3124

gid = pwd.getpwnam(group).pw_gid

2464

gid = pwd.getpwnam(name).pw_gid

3125

2465

break

3126

2466

except KeyError:

3127

2467

continue

3131

2471

try:

3132

2472

os.setgid(gid)

3133

2473

os.setuid(uid)

3134

if debug:

3135

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

3136

gid))

3137

2474

except OSError as error:

3138

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

3139

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

3140

2475

if error.errno != errno.EPERM:

3141

raise

3142

2476

raise error

2477

3143

2478

if debug:

3144

2479

# Enable all possible GnuTLS debugging

3145

2480

3146

2481

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

3147

2482

# - GnuTLS manual

3148

gnutls.global_set_log_level(11)

3149

3150

@gnutls.log_func

2483

gnutls.library.functions.gnutls_global_set_log_level(11)

2484

2485

@gnutls.library.types.gnutls_log_func

3151

2486

def debug_gnutls(level, string):

3152

2487

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

3153

3154

gnutls.global_set_log_function(debug_gnutls)

3155

2488

2489

(gnutls.library.functions

2490

.gnutls_global_set_log_function(debug_gnutls))

2491

3156

2492

# Redirect stdin so all checkers get /dev/null

3157

2493

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

3158

2494

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

3159

2495

if null > 2:

3160

2496

os.close(null)

3161

2497

3162

2498

# Need to fork before connecting to D-Bus

3163

2499

if not foreground:

3164

2500

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

3165

2501

daemon()

3166

3167

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

3168

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

3169

# need to inform GLib that threads will be used.

3170

GLib.threads_init()

3171

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

3172

2507

global main_loop

3173

2508

# From the Avahi example code

3174

2509

DBusGMainLoop(set_as_default=True)

3175

main_loop = GLib.MainLoop()

2510

main_loop = gobject.MainLoop()

3176

2511

bus = dbus.SystemBus()

3177

2512

# End of Avahi example code

3178

2513

if use_dbus:

3179

2514

try:

3180

2515

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

3181

bus,

3182

do_not_queue=True)

3183

old_bus_name = dbus.service.BusName(

3184

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

3185

do_not_queue=True)

3186

except dbus.exceptions.DBusException as e:

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:

3187

2521

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

3188

2522

use_dbus = False

3189

2523

server_settings["use_dbus"] = False

3190

2524

tcp_server.use_dbus = False

3191

if zeroconf:

3192

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

3193

service = AvahiServiceToSyslog(

3194

name=server_settings["servicename"],

3195

servicetype="_mandos._tcp",

3196

protocol=protocol,

3197

bus=bus)

3198

if server_settings["interface"]:

3199

service.interface = if_nametoindex(

3200

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

3201

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

3202

2534

global multiprocessing_manager

3203

2535

multiprocessing_manager = multiprocessing.Manager()

3204

2536

3205

2537

client_class = Client

3206

2538

if use_dbus:

3207

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

3208

2539

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

2540

3209

2541

client_settings = Client.config_parser(client_config)

3210

2542

old_client_settings = {}

3211

2543

clients_data = {}

3212

2544

3213

2545

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

3214

2546

global wnull

3215

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

2547

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

3216

2548

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

3217

2549

# mode

3218

2550

if debug or not foreground:

3219

2551

wnull.close()

3220

2552

3221

2553

# Get client data and settings from last running state.

3222

2554

if server_settings["restore"]:

3223

2555

try:

3224

2556

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

3225

if sys.version_info.major == 2:

3226

clients_data, old_client_settings = pickle.load(

3227

stored_state)

3228

else:

3229

bytes_clients_data, bytes_old_client_settings = (

3230

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

3231

# Fix bytes to strings

3232

# clients_data

3233

# .keys()

3234

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

3235

if isinstance(key, bytes)

3236

else key): value

3237

for key, value in

3238

bytes_clients_data.items()}

3239

del bytes_clients_data

3240

for key in clients_data:

3241

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

3242

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

3243

for k, v in

3244

clients_data[key].items()}

3245

clients_data[key] = value

3246

# .client_structure

3247

value["client_structure"] = [

3248

(s.decode("utf-8")

3249

if isinstance(s, bytes)

3250

else s) for s in

3251

value["client_structure"]]

3252

# .name, .host, and .checker_command

3253

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

3254

if isinstance(value[k], bytes):

3255

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

3256

if "key_id" not in value:

3257

value["key_id"] = ""

3258

elif "fingerprint" not in value:

3259

value["fingerprint"] = ""

3260

# old_client_settings

3261

# .keys()

3262

old_client_settings = {

3263

(key.decode("utf-8")

3264

if isinstance(key, bytes)

3265

else key): value

3266

for key, value in

3267

bytes_old_client_settings.items()}

3268

del bytes_old_client_settings

3269

# .host and .checker_command

3270

for value in old_client_settings.values():

3271

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

3272

if isinstance(value[attribute], bytes):

3273

value[attribute] = (value[attribute]

3274

.decode("utf-8"))

2557

clients_data, old_client_settings = (pickle.load

2558

(stored_state))

3275

2559

os.remove(stored_state_path)

3276

2560

except IOError as e:

3277

2561

if e.errno == errno.ENOENT:

3278

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

3279

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

2562

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

2563

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

3280

2564

else:

3281

2565

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

3282

2566

exc_info=e)

3283

2567

raise

3284

2568

except EOFError as e:

3285

2569

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

3286

"EOFError:",

3287

exc_info=e)

3288

2570

"EOFError:", exc_info=e)

2571

3289

2572

with PGPEngine() as pgp:

3290

for client_name, client in clients_data.items():

2573

for client_name, client in clients_data.iteritems():

3291

2574

# Skip removed clients

3292

2575

if client_name not in client_settings:

3293

2576

continue

3294

2577

3295

2578

# Decide which value to use after restoring saved state.

3296

2579

# We have three different values: Old config file,

3297

2580

# new config file, and saved state.

3302

2585

# For each value in new config, check if it

3303

2586

# differs from the old config value (Except for

3304

2587

# the "secret" attribute)

3305

if (name != "secret"

3306

and (value !=

3307

old_client_settings[client_name][name])):

2588

if (name != "secret" and

2589

value != old_client_settings[client_name]

2590

[name]):

3308

2591

client[name] = value

3309

2592

except KeyError:

3310

2593

pass

3311

2594

3312

2595

# Clients who has passed its expire date can still be

3313

# enabled if its last checker was successful. A Client

2596

# enabled if its last checker was successful. Clients

3314

2597

# whose checker succeeded before we stored its state is

3315

2598

# assumed to have successfully run all checkers during

3316

2599

# downtime.

3318

2601

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

3319

2602

if not client["last_checked_ok"]:

3320

2603

logger.warning(

3321

"disabling client {} - Client never "

3322

"performed a successful checker".format(

3323

client_name))

2604

"disabling client {0} - Client never "

2605

"performed a successful checker"

2606

.format(client_name))

3324

2607

client["enabled"] = False

3325

2608

elif client["last_checker_status"] != 0:

3326

2609

logger.warning(

3327

"disabling client {} - Client last"

3328

" checker failed with error code"

3329

" {}".format(

3330

client_name,

3331

client["last_checker_status"]))

2610

"disabling client {0} - Client "

2611

"last checker failed with error code {1}"

2612

.format(client_name,

2613

client["last_checker_status"]))

3332

2614

client["enabled"] = False

3333

2615

else:

3334

client["expires"] = (

3335

datetime.datetime.utcnow()

3336

+ client["timeout"])

2616

client["expires"] = (datetime.datetime

2617

.utcnow()

2618

+ client["timeout"])

3337

2619

logger.debug("Last checker succeeded,"

3338

" keeping {} enabled".format(

3339

client_name))

2620

" keeping {0} enabled"

2621

.format(client_name))

3340

2622

try:

3341

client["secret"] = pgp.decrypt(

3342

client["encrypted_secret"],

3343

client_settings[client_name]["secret"])

2623

client["secret"] = (

2624

pgp.decrypt(client["encrypted_secret"],

2625

client_settings[client_name]

2626

["secret"]))

3344

2627

except PGPError:

3345

2628

# If decryption fails, we use secret from new settings

3346

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

3347

client_name))

3348

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

3349

["secret"])

3350

2629

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

2630

.format(client_name))

2631

client["secret"] = (

2632

client_settings[client_name]["secret"])

2633

3351

2634

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

3352

2635

for client_name in (set(old_client_settings)

3353

2636

- set(client_settings)):

3355

2638

for client_name in (set(client_settings)

3356

2639

- set(old_client_settings)):

3357

2640

clients_data[client_name] = client_settings[client_name]

3358

2641

3359

2642

# Create all client objects

3360

for client_name, client in clients_data.items():

2643

for client_name, client in clients_data.iteritems():

3361

2644

tcp_server.clients[client_name] = client_class(

3362

name=client_name,

3363

settings=client,

3364

server_settings=server_settings)

3365

2645

name = client_name, settings = client,

2646

server_settings = server_settings)

2647

3366

2648

if not tcp_server.clients:

3367

2649

logger.warning("No clients defined")

3368

2650

3369

2651

if not foreground:

3370

2652

if pidfile is not None:

3371

pid = os.getpid()

3372

2653

try:

3373

2654

with pidfile:

3374

print(pid, file=pidfile)

2655

pid = os.getpid()

2656

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

3375

2657

except IOError:

3376

2658

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

3377

2659

pidfilename, pid)

3378

2660

del pidfile

3379

2661

del pidfilename

3380

3381

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

3382

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3383

lambda: main_loop.quit() and False)

3384

2662

2663

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

2664

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

2665

3385

2666

if use_dbus:

3386

3387

@alternate_dbus_interfaces(

3388

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

3389

class MandosDBusService(DBusObjectWithObjectManager):

2667

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

2668

"se.bsnet.fukt.Mandos"})

2669

class MandosDBusService(DBusObjectWithProperties):

3390

2670

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

3391

3392

2671

def __init__(self):

3393

2672

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

3394

3395

2673

_interface = "se.recompile.Mandos"

3396

2674

2675

@dbus_interface_annotations(_interface)

2676

def _foo(self):

2677

return { "org.freedesktop.DBus.Property"

2678

".EmitsChangedSignal":

2679

"false"}

2680

3397

2681

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

3398

2682

def ClientAdded(self, objpath):

3399

2683

"D-Bus signal"

3400

2684

pass

3401

2685

3402

2686

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

3403

def ClientNotFound(self, key_id, address):

2687

def ClientNotFound(self, fingerprint, address):

3404

2688

"D-Bus signal"

3405

2689

pass

3406

3407

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

3408

"true"})

2690

3409

2691

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

3410

2692

def ClientRemoved(self, objpath, name):

3411

2693

"D-Bus signal"

3412

2694

pass

3413

3414

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

3415

"true"})

2695

3416

2696

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

3417

2697

def GetAllClients(self):

3418

2698

"D-Bus method"

3419

return dbus.Array(c.dbus_object_path for c in

3420

tcp_server.clients.values())

3421

3422

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

3423

"true"})

2699

return dbus.Array(c.dbus_object_path

2700

for c in

2701

tcp_server.clients.itervalues())

2702

3424

2703

@dbus.service.method(_interface,

3425

2704

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

3426

2705

def GetAllClientsWithProperties(self):

3427

2706

"D-Bus method"

3428

2707

return dbus.Dictionary(

3429

{c.dbus_object_path: c.GetAll(

3430

"se.recompile.Mandos.Client")

3431

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

2708

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

2709

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

3432

2710

signature="oa{sv}")

3433

2711

3434

2712

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

3435

2713

def RemoveClient(self, object_path):

3436

2714

"D-Bus method"

3437

for c in tcp_server.clients.values():

2715

for c in tcp_server.clients.itervalues():

3438

2716

if c.dbus_object_path == object_path:

3439

2717

del tcp_server.clients[c.name]

3440

2718

c.remove_from_connection()

3441

# Don't signal the disabling

2719

# Don't signal anything except ClientRemoved

3442

2720

c.disable(quiet=True)

3443

# Emit D-Bus signal for removal

3444

self.client_removed_signal(c)

2721

# Emit D-Bus signal

2722

self.ClientRemoved(object_path, c.name)

3445

2723

return

3446

2724

raise KeyError(object_path)

3447

2725

3448

2726

del _interface

3449

3450

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3451

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

3452

def GetManagedObjects(self):

3453

"""D-Bus method"""

3454

return dbus.Dictionary(

3455

{client.dbus_object_path:

3456

dbus.Dictionary(

3457

{interface: client.GetAll(interface)

3458

for interface in

3459

client._get_all_interface_names()})

3460

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

3461

3462

def client_added_signal(self, client):

3463

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

3464

if use_dbus:

3465

# New standard signal

3466

self.InterfacesAdded(

3467

client.dbus_object_path,

3468

dbus.Dictionary(

3469

{interface: client.GetAll(interface)

3470

for interface in

3471

client._get_all_interface_names()}))

3472

# Old signal

3473

self.ClientAdded(client.dbus_object_path)

3474

3475

def client_removed_signal(self, client):

3476

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

3477

if use_dbus:

3478

# New standard signal

3479

self.InterfacesRemoved(

3480

client.dbus_object_path,

3481

client._get_all_interface_names())

3482

# Old signal

3483

self.ClientRemoved(client.dbus_object_path,

3484

client.name)

3485

2727

3486

2728

mandos_dbus_service = MandosDBusService()

3487

3488

# Save modules to variables to exempt the modules from being

3489

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

3490

mp = multiprocessing

3491

wn = wnull

3492

2729

3493

2730

def cleanup():

3494

2731

"Cleanup function; run on exit"

3495

if zeroconf:

3496

service.cleanup()

3497

3498

mp.active_children()

3499

wn.close()

2732

service.cleanup()

2733

2734

multiprocessing.active_children()

2735

wnull.close()

3500

2736

if not (tcp_server.clients or client_settings):

3501

2737

return

3502

2738

3503

2739

# Store client before exiting. Secrets are encrypted with key

3504

2740

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

3505

2741

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

3506

2742

clients = {}

3507

2743

with PGPEngine() as pgp:

3508

for client in tcp_server.clients.values():

2744

for client in tcp_server.clients.itervalues():

3509

2745

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

3510

2746

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

3511

2747

key)

3512

2748

client_dict = {}

3513

2749

3514

2750

# A list of attributes that can not be pickled

3515

2751

# + secret.

3516

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

3517

"checker", "server_settings"}

3518

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

3519

.Object):

2752

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

2753

"checker", "server_settings"))

2754

for name, typ in (inspect.getmembers

2755

(dbus.service.Object)):

3520

2756

exclude.add(name)

3521

2757

3522

2758

client_dict["encrypted_secret"] = (client

3523

2759

.encrypted_secret)

3524

2760

for attr in client.client_structure:

3525

2761

if attr not in exclude:

3526

2762

client_dict[attr] = getattr(client, attr)

3527

2763

3528

2764

clients[client.name] = client_dict

3529

2765

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

3530

2766

3531

2767

try:

3532

with tempfile.NamedTemporaryFile(

3533

mode='wb',

3534

suffix=".pickle",

3535

prefix='clients-',

3536

dir=os.path.dirname(stored_state_path),

3537

delete=False) as stored_state:

3538

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

3539

protocol=2)

3540

tempname = stored_state.name

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

3541

2774

os.rename(tempname, stored_state_path)

3542

2775

except (IOError, OSError) as e:

3543

2776

if not debug:

3546

2779

except NameError:

3547

2780

pass

3548

2781

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

3549

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

2782

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

3550

2783

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

3551

2784

else:

3552

2785

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

3553

2786

exc_info=e)

3554

raise

3555

2787

raise e

2788

3556

2789

# Delete all clients, and settings from config

3557

2790

while tcp_server.clients:

3558

2791

name, client = tcp_server.clients.popitem()

3559

2792

if use_dbus:

3560

2793

client.remove_from_connection()

3561

# Don't signal the disabling

2794

# Don't signal anything except ClientRemoved

3562

2795

client.disable(quiet=True)

3563

# Emit D-Bus signal for removal

3564

2796

if use_dbus:

3565

mandos_dbus_service.client_removed_signal(client)

2797

# Emit D-Bus signal

2798

mandos_dbus_service.ClientRemoved(client

2799

.dbus_object_path,

2800

client.name)

3566

2801

client_settings.clear()

3567

2802

3568

2803

atexit.register(cleanup)

3569

3570

for client in tcp_server.clients.values():

2804

2805

for client in tcp_server.clients.itervalues():

3571

2806

if use_dbus:

3572

# Emit D-Bus signal for adding

3573

mandos_dbus_service.client_added_signal(client)

2807

# Emit D-Bus signal

2808

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3574

2809

# Need to initiate checking of clients

3575

2810

if client.enabled:

3576

2811

client.init_checker()

3577

2812

3578

2813

tcp_server.enable()

3579

2814

tcp_server.server_activate()

3580

2815

3581

2816

# Find out what port we got

3582

if zeroconf:

3583

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

2817

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

3584

2818

if use_ipv6:

3585

2819

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

3586

2820

" flowinfo %d, scope_id %d",

3588

2822

else: # IPv4

3589

2823

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

3590

2824

*tcp_server.socket.getsockname())

3591

3592

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

3593

2825

2826

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

2827

3594

2828

try:

3595

if zeroconf:

3596

# From the Avahi example code

3597

try:

3598

service.activate()

3599

except dbus.exceptions.DBusException as error:

3600

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

3601

cleanup()

3602

sys.exit(1)

3603

# End of Avahi example code

3604

3605

GLib.io_add_watch(

3606

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

3607

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

3608

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

3609

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

3610

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

3611

2843

logger.debug("Starting main loop")

3612

2844

main_loop.run()

3613

2845

except AvahiError as error:

3622

2854

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

3623

2855

cleanup()

3624

2856

3625

3626

def should_only_run_tests():

3627

parser = argparse.ArgumentParser(add_help=False)

3628

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

3629

args, unknown_args = parser.parse_known_args()

3630

run_tests = args.check

3631

if run_tests:

3632

# Remove --check argument from sys.argv

3633

sys.argv[1:] = unknown_args

3634

return run_tests

3635

3636

# Add all tests from doctest strings

3637

def load_tests(loader, tests, none):

3638

import doctest

3639

tests.addTests(doctest.DocTestSuite())

3640

return tests

3641

3642

2857

if __name__ == '__main__':

3643

try:

3644

if should_only_run_tests():

3645

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

3646

unittest.main()

3647

else:

3648

main()

3649

finally:

3650

logging.shutdown()

2858

main()