/mandos/release : revision 237.7.195

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#!/usr/bin/python3 -b

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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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53

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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66

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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72

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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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# 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.major == 2:

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str = unicode

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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 = "1.6.2"

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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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143

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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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168

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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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136

pass

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137

195

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196

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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199

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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

212

143

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.

217

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

218

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

219

146

'--quiet',

147

'--no-use-agent']

148

220

149

def __enter__(self):

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150

return self

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151

223

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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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155

227

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def __del__(self):

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self._cleanup()

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230

159

def _cleanup(self):

231

160

if self.tempdir is not None:

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# Delete contents of tempdir

233

162

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

234

topdown=False):

163

topdown = False):

235

164

for filename in files:

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

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for dirname in dirs:

239

168

# Remove tempdir

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os.rmdir(self.tempdir)

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170

self.tempdir = None

242

171

243

172

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.

250

179

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

251

180

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

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return encoded

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254

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def encrypt(self, data, password):

255

184

passphrase = self.password_encode(password)

256

with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

185

with tempfile.NamedTemporaryFile(dir=self.tempdir

186

) as passfile:

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passfile.write(passphrase)

259

188

passfile.flush()

260

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,

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stdout=subprocess.PIPE,

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stderr=subprocess.PIPE)

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

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

195

stderr = subprocess.PIPE)

196

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

271

200

272

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def decrypt(self, data, password):

273

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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with tempfile.NamedTemporaryFile(dir = self.tempdir

204

) as passfile:

276

205

passfile.write(passphrase)

277

206

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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passfile.name]

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210

+ self.gnupgargs,

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stdin=subprocess.PIPE,

283

stdout=subprocess.PIPE,

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stderr=subprocess.PIPE)

285

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

211

stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

214

decrypted_plaintext, err = proc.communicate(input

215

= data)

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216

if proc.returncode != 0:

287

217

raise PGPError(err)

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return decrypted_plaintext

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219

290

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291

# Pretend that we have an Avahi module

292

class avahi:

293

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

294

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

295

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

296

PROTO_INET = 0 # avahi-common/address.h

297

PROTO_INET6 = 1 # avahi-common/address.h

298

DBUS_NAME = "org.freedesktop.Avahi"

299

DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"

300

DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

301

DBUS_PATH_SERVER = "/"

302

303

@staticmethod

304

def string_array_to_txt_array(t):

305

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

306

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

307

ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h

308

ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h

309

ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h

310

SERVER_INVALID = 0 # avahi-common/defs.h

311

SERVER_REGISTERING = 1 # avahi-common/defs.h

312

SERVER_RUNNING = 2 # avahi-common/defs.h

313

SERVER_COLLISION = 3 # avahi-common/defs.h

314

SERVER_FAILURE = 4 # avahi-common/defs.h

315

316

317

221

class AvahiError(Exception):

318

222

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

319

223

self.value = value

320

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

321

**kwargs)

322

224

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

225

def __unicode__(self):

226

return unicode(repr(self.value))

323

227

324

228

class AvahiServiceError(AvahiError):

325

229

pass

326

230

327

328

231

class AvahiGroupError(AvahiError):

329

232

pass

330

233

331

234

332

class AvahiService:

235

class AvahiService(object):

333

236

"""An Avahi (Zeroconf) service.

334

237

335

238

Attributes:

336

239

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

337

240

Used to optionally bind to the specified interface.

349

252

server: D-Bus Server

350

253

bus: dbus.SystemBus()

351

254

"""

352

353

def __init__(self,

354

interface=avahi.IF_UNSPEC,

355

name=None,

356

servicetype=None,

357

port=None,

358

TXT=None,

359

domain="",

360

host="",

361

max_renames=32768,

362

protocol=avahi.PROTO_UNSPEC,

363

bus=None):

255

256

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

257

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

258

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

259

protocol = avahi.PROTO_UNSPEC, bus = None):

364

260

self.interface = interface

365

261

self.name = name

366

262

self.type = servicetype

375

271

self.server = None

376

272

self.bus = bus

377

273

self.entry_group_state_changed_match = None

378

379

def rename(self, remove=True):

274

275

def rename(self):

380

276

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

381

277

if self.rename_count >= self.max_renames:

382

278

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

383

279

" after %i retries, exiting.",

384

280

self.rename_count)

385

281

raise AvahiServiceError("Too many renames")

386

self.name = str(

387

self.server.GetAlternativeServiceName(self.name))

388

self.rename_count += 1

282

self.name = unicode(self.server

283

.GetAlternativeServiceName(self.name))

389

284

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

390

285

self.name)

391

if remove:

392

self.remove()

286

self.remove()

393

287

try:

394

288

self.add()

395

289

except dbus.exceptions.DBusException as error:

396

if (error.get_dbus_name()

397

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

398

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

399

return self.rename(remove=False)

400

else:

401

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

402

self.cleanup()

403

os._exit(1)

404

290

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

291

self.cleanup()

292

os._exit(1)

293

self.rename_count += 1

294

405

295

def remove(self):

406

296

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

407

297

if self.entry_group_state_changed_match is not None:

409

299

self.entry_group_state_changed_match = None

410

300

if self.group is not None:

411

301

self.group.Reset()

412

302

413

303

def add(self):

414

304

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

415

305

self.remove()

432

322

dbus.UInt16(self.port),

433

323

avahi.string_array_to_txt_array(self.TXT))

434

324

self.group.Commit()

435

325

436

326

def entry_group_state_changed(self, state, error):

437

327

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

438

328

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

439

329

440

330

if state == avahi.ENTRY_GROUP_ESTABLISHED:

441

331

logger.debug("Zeroconf service established.")

442

332

elif state == avahi.ENTRY_GROUP_COLLISION:

444

334

self.rename()

445

335

elif state == avahi.ENTRY_GROUP_FAILURE:

446

336

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

447

str(error))

448

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

449

337

unicode(error))

338

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

339

.format(error))

340

450

341

def cleanup(self):

451

342

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

452

343

if self.group is not None:

457

348

pass

458

349

self.group = None

459

350

self.remove()

460

351

461

352

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

462

353

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

463

354

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

464

bad_states = {

465

avahi.SERVER_INVALID: "Zeroconf server invalid",

466

avahi.SERVER_REGISTERING: None,

467

avahi.SERVER_COLLISION: "Zeroconf server name collision",

468

avahi.SERVER_FAILURE: "Zeroconf server failure",

469

}

355

bad_states = { avahi.SERVER_INVALID:

356

"Zeroconf server invalid",

357

avahi.SERVER_REGISTERING: None,

358

avahi.SERVER_COLLISION:

359

"Zeroconf server name collision",

360

avahi.SERVER_FAILURE:

361

"Zeroconf server failure" }

470

362

if state in bad_states:

471

363

if bad_states[state] is not None:

472

364

if error is None:

475

367

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

476

368

self.cleanup()

477

369

elif state == avahi.SERVER_RUNNING:

478

try:

479

self.add()

480

except dbus.exceptions.DBusException as error:

481

if (error.get_dbus_name()

482

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

483

logger.info("Local Zeroconf service name"

484

" collision.")

485

return self.rename(remove=False)

486

else:

487

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

488

self.cleanup()

489

os._exit(1)

370

self.add()

490

371

else:

491

372

if error is None:

492

373

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

493

374

else:

494

375

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

495

376

496

377

def activate(self):

497

378

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

498

379

if self.server is None:

502

383

follow_name_owner_changes=True),

503

384

avahi.DBUS_INTERFACE_SERVER)

504

385

self.server.connect_to_signal("StateChanged",

505

self.server_state_changed)

386

self.server_state_changed)

506

387

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

507

388

508

389

509

390

class AvahiServiceToSyslog(AvahiService):

510

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

391

def rename(self):

511

392

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

512

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

513

syslogger.setFormatter(logging.Formatter(

514

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

515

.format(self.name)))

393

ret = AvahiService.rename(self)

394

syslogger.setFormatter(logging.Formatter

395

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

396

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

397

.format(self.name)))

516

398

return ret

517

399

518

400

519

# Pretend that we have a GnuTLS module

520

class gnutls:

521

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

522

523

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

524

if library is None:

525

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

526

_library = ctypes.cdll.LoadLibrary(library)

527

del library

528

529

# Unless otherwise indicated, the constants and types below are

530

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

531

532

# Constants

533

E_SUCCESS = 0

534

E_INTERRUPTED = -52

535

E_AGAIN = -28

536

CRT_OPENPGP = 2

537

CRT_RAWPK = 3

538

CLIENT = 2

539

SHUT_RDWR = 0

540

CRD_CERTIFICATE = 1

541

E_NO_CERTIFICATE_FOUND = -49

542

X509_FMT_DER = 0

543

NO_TICKETS = 1<<10

544

ENABLE_RAWPK = 1<<18

545

CTYPE_PEERS = 3

546

KEYID_USE_SHA256 = 1 # gnutls/x509.h

547

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

548

549

# Types

550

class session_int(ctypes.Structure):

551

_fields_ = []

552

session_t = ctypes.POINTER(session_int)

553

554

class certificate_credentials_st(ctypes.Structure):

555

_fields_ = []

556

certificate_credentials_t = ctypes.POINTER(

557

certificate_credentials_st)

558

certificate_type_t = ctypes.c_int

559

560

class datum_t(ctypes.Structure):

561

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

562

('size', ctypes.c_uint)]

563

564

class openpgp_crt_int(ctypes.Structure):

565

_fields_ = []

566

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

567

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

568

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

569

credentials_type_t = ctypes.c_int

570

transport_ptr_t = ctypes.c_void_p

571

close_request_t = ctypes.c_int

572

573

# Exceptions

574

class Error(Exception):

575

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

576

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

577

# code is passed, convert it to a string with

578

# gnutls.strerror()

579

self.code = code

580

if message is None and code is not None:

581

message = gnutls.strerror(code)

582

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

583

message, *args)

584

585

class CertificateSecurityError(Error):

586

pass

587

588

# Classes

589

class Credentials:

590

def __init__(self):

591

self._c_object = gnutls.certificate_credentials_t()

592

gnutls.certificate_allocate_credentials(

593

ctypes.byref(self._c_object))

594

self.type = gnutls.CRD_CERTIFICATE

595

596

def __del__(self):

597

gnutls.certificate_free_credentials(self._c_object)

598

599

class ClientSession:

600

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

601

self._c_object = gnutls.session_t()

602

gnutls_flags = gnutls.CLIENT

603

if gnutls.check_version(b"3.5.6"):

604

gnutls_flags |= gnutls.NO_TICKETS

605

if gnutls.has_rawpk:

606

gnutls_flags |= gnutls.ENABLE_RAWPK

607

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

608

del gnutls_flags

609

gnutls.set_default_priority(self._c_object)

610

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

611

gnutls.handshake_set_private_extensions(self._c_object,

612

True)

613

self.socket = socket

614

if credentials is None:

615

credentials = gnutls.Credentials()

616

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

617

ctypes.cast(credentials._c_object,

618

ctypes.c_void_p))

619

self.credentials = credentials

620

621

def __del__(self):

622

gnutls.deinit(self._c_object)

623

624

def handshake(self):

625

return gnutls.handshake(self._c_object)

626

627

def send(self, data):

628

data = bytes(data)

629

data_len = len(data)

630

while data_len > 0:

631

data_len -= gnutls.record_send(self._c_object,

632

data[-data_len:],

633

data_len)

634

635

def bye(self):

636

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

637

638

# Error handling functions

639

def _error_code(result):

640

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

641

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

642

if result >= 0:

643

return result

644

if result == gnutls.E_NO_CERTIFICATE_FOUND:

645

raise gnutls.CertificateSecurityError(code=result)

646

raise gnutls.Error(code=result)

647

648

def _retry_on_error(result, func, arguments):

649

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

650

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

651

while result < 0:

652

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

653

return _error_code(result)

654

result = func(*arguments)

655

return result

656

657

# Unless otherwise indicated, the function declarations below are

658

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

659

660

# Functions

661

priority_set_direct = _library.gnutls_priority_set_direct

662

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

663

ctypes.POINTER(ctypes.c_char_p)]

664

priority_set_direct.restype = _error_code

665

666

init = _library.gnutls_init

667

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

668

init.restype = _error_code

669

670

set_default_priority = _library.gnutls_set_default_priority

671

set_default_priority.argtypes = [session_t]

672

set_default_priority.restype = _error_code

673

674

record_send = _library.gnutls_record_send

675

record_send.argtypes = [session_t, ctypes.c_void_p,

676

ctypes.c_size_t]

677

record_send.restype = ctypes.c_ssize_t

678

record_send.errcheck = _retry_on_error

679

680

certificate_allocate_credentials = (

681

_library.gnutls_certificate_allocate_credentials)

682

certificate_allocate_credentials.argtypes = [

683

ctypes.POINTER(certificate_credentials_t)]

684

certificate_allocate_credentials.restype = _error_code

685

686

certificate_free_credentials = (

687

_library.gnutls_certificate_free_credentials)

688

certificate_free_credentials.argtypes = [

689

certificate_credentials_t]

690

certificate_free_credentials.restype = None

691

692

handshake_set_private_extensions = (

693

_library.gnutls_handshake_set_private_extensions)

694

handshake_set_private_extensions.argtypes = [session_t,

695

ctypes.c_int]

696

handshake_set_private_extensions.restype = None

697

698

credentials_set = _library.gnutls_credentials_set

699

credentials_set.argtypes = [session_t, credentials_type_t,

700

ctypes.c_void_p]

701

credentials_set.restype = _error_code

702

703

strerror = _library.gnutls_strerror

704

strerror.argtypes = [ctypes.c_int]

705

strerror.restype = ctypes.c_char_p

706

707

certificate_type_get = _library.gnutls_certificate_type_get

708

certificate_type_get.argtypes = [session_t]

709

certificate_type_get.restype = _error_code

710

711

certificate_get_peers = _library.gnutls_certificate_get_peers

712

certificate_get_peers.argtypes = [session_t,

713

ctypes.POINTER(ctypes.c_uint)]

714

certificate_get_peers.restype = ctypes.POINTER(datum_t)

715

716

global_set_log_level = _library.gnutls_global_set_log_level

717

global_set_log_level.argtypes = [ctypes.c_int]

718

global_set_log_level.restype = None

719

720

global_set_log_function = _library.gnutls_global_set_log_function

721

global_set_log_function.argtypes = [log_func]

722

global_set_log_function.restype = None

723

724

deinit = _library.gnutls_deinit

725

deinit.argtypes = [session_t]

726

deinit.restype = None

727

728

handshake = _library.gnutls_handshake

729

handshake.argtypes = [session_t]

730

handshake.restype = _error_code

731

handshake.errcheck = _retry_on_error

732

733

transport_set_ptr = _library.gnutls_transport_set_ptr

734

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

735

transport_set_ptr.restype = None

736

737

bye = _library.gnutls_bye

738

bye.argtypes = [session_t, close_request_t]

739

bye.restype = _error_code

740

bye.errcheck = _retry_on_error

741

742

check_version = _library.gnutls_check_version

743

check_version.argtypes = [ctypes.c_char_p]

744

check_version.restype = ctypes.c_char_p

745

746

_need_version = b"3.3.0"

747

if check_version(_need_version) is None:

748

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

749

.format(_need_version))

750

751

_tls_rawpk_version = b"3.6.6"

752

has_rawpk = bool(check_version(_tls_rawpk_version))

753

754

if has_rawpk:

755

# Types

756

class pubkey_st(ctypes.Structure):

757

_fields = []

758

pubkey_t = ctypes.POINTER(pubkey_st)

759

760

x509_crt_fmt_t = ctypes.c_int

761

762

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

763

pubkey_init = _library.gnutls_pubkey_init

764

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

765

pubkey_init.restype = _error_code

766

767

pubkey_import = _library.gnutls_pubkey_import

768

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

769

x509_crt_fmt_t]

770

pubkey_import.restype = _error_code

771

772

pubkey_get_key_id = _library.gnutls_pubkey_get_key_id

773

pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,

774

ctypes.POINTER(ctypes.c_ubyte),

775

ctypes.POINTER(ctypes.c_size_t)]

776

pubkey_get_key_id.restype = _error_code

777

778

pubkey_deinit = _library.gnutls_pubkey_deinit

779

pubkey_deinit.argtypes = [pubkey_t]

780

pubkey_deinit.restype = None

781

else:

782

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

783

784

openpgp_crt_init = _library.gnutls_openpgp_crt_init

785

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

786

openpgp_crt_init.restype = _error_code

787

788

openpgp_crt_import = _library.gnutls_openpgp_crt_import

789

openpgp_crt_import.argtypes = [openpgp_crt_t,

790

ctypes.POINTER(datum_t),

791

openpgp_crt_fmt_t]

792

openpgp_crt_import.restype = _error_code

793

794

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

795

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

796

ctypes.POINTER(ctypes.c_uint)]

797

openpgp_crt_verify_self.restype = _error_code

798

799

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

800

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

801

openpgp_crt_deinit.restype = None

802

803

openpgp_crt_get_fingerprint = (

804

_library.gnutls_openpgp_crt_get_fingerprint)

805

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

806

ctypes.c_void_p,

807

ctypes.POINTER(

808

ctypes.c_size_t)]

809

openpgp_crt_get_fingerprint.restype = _error_code

810

811

if check_version(b"3.6.4"):

812

certificate_type_get2 = _library.gnutls_certificate_type_get2

813

certificate_type_get2.argtypes = [session_t, ctypes.c_int]

814

certificate_type_get2.restype = _error_code

815

816

# Remove non-public functions

817

del _error_code, _retry_on_error

818

819

820

def call_pipe(connection, # : multiprocessing.Connection

821

func, *args, **kwargs):

822

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

823

824

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

825

return value on the provided multiprocessing.Connection.

826

"""

827

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

828

connection.close()

829

830

831

class Client:

401

def timedelta_to_milliseconds(td):

402

"Convert a datetime.timedelta() to milliseconds"

403

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

404

+ (td.seconds * 1000)

405

+ (td.microseconds // 1000))

406

407

408

class Client(object):

832

409

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

833

410

834

411

Attributes:

835

412

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

836

413

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

837

414

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

838

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

839

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

840

running.

841

checker_callback_tag: a GLib event source tag, or None

415

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

416

to see if the client lives.

417

'None' if no process is running.

418

checker_callback_tag: a gobject event source tag, or None

842

419

checker_command: string; External command which is run to check

843

420

if client lives. %() expansions are done at

844

421

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

845

422

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

846

checker_initiator_tag: a GLib event source tag, or None

423

checker_initiator_tag: a gobject event source tag, or None

847

424

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

848

425

client_structure: Object describing what attributes a client has

849

426

and is used for storing the client at exit

850

427

current_checker_command: string; current running checker_command

851

disable_initiator_tag: a GLib event source tag, or None

428

disable_initiator_tag: a gobject event source tag, or None

852

429

enabled: bool()

853

430

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

854

uniquely identify an OpenPGP client

855

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

856

a client using raw public keys

431

uniquely identify the client

857

432

host: string; available for use by the checker command

858

433

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

859

434

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

861

436

last_checker_status: integer between 0 and 255 reflecting exit

862

437

status of last checker. -1 reflects crashed

863

438

checker, -2 means no checker completed yet.

864

last_checker_signal: The signal which killed the last checker, if

865

last_checker_status is -1

866

439

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

867

440

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

868

441

D-Bus identifiers

875

448

disabled, or None

876

449

server_settings: The server_settings dict from main()

877

450

"""

878

451

879

452

runtime_expansions = ("approval_delay", "approval_duration",

880

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

453

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

881

454

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

882

455

"last_approval_request", "last_checked_ok",

883

456

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

884

client_defaults = {

885

"timeout": "PT5M",

886

"extended_timeout": "PT15M",

887

"interval": "PT2M",

888

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

889

"host": "",

890

"approval_delay": "PT0S",

891

"approval_duration": "PT1S",

892

"approved_by_default": "True",

893

"enabled": "True",

894

}

895

457

client_defaults = { "timeout": "PT5M",

458

"extended_timeout": "PT15M",

459

"interval": "PT2M",

460

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

461

"host": "",

462

"approval_delay": "PT0S",

463

"approval_duration": "PT1S",

464

"approved_by_default": "True",

465

"enabled": "True",

466

}

467

468

def timeout_milliseconds(self):

469

"Return the 'timeout' attribute in milliseconds"

470

return timedelta_to_milliseconds(self.timeout)

471

472

def extended_timeout_milliseconds(self):

473

"Return the 'extended_timeout' attribute in milliseconds"

474

return timedelta_to_milliseconds(self.extended_timeout)

475

476

def interval_milliseconds(self):

477

"Return the 'interval' attribute in milliseconds"

478

return timedelta_to_milliseconds(self.interval)

479

480

def approval_delay_milliseconds(self):

481

return timedelta_to_milliseconds(self.approval_delay)

482

896

483

@staticmethod

897

484

def config_parser(config):

898

485

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

905

492

for client_name in config.sections():

906

493

section = dict(config.items(client_name))

907

494

client = settings[client_name] = {}

908

495

909

496

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

910

497

# Reformat values from string types to Python types

911

498

client["approved_by_default"] = config.getboolean(

912

499

client_name, "approved_by_default")

913

500

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

914

501

"enabled")

915

916

# Uppercase and remove spaces from key_id and fingerprint

917

# for later comparison purposes with return value from the

918

# key_id() and fingerprint() functions

919

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

920

.replace(" ", ""))

502

921

503

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

922

504

.replace(" ", ""))

923

505

if "secret" in section:

924

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

925

.encode("utf-8"),

926

"base64")

506

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

927

507

elif "secfile" in section:

928

508

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

929

509

(section["secfile"])),

930

510

"rb") as secfile:

931

511

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

932

512

else:

933

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

513

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

934

514

.format(section))

935

515

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

936

516

client["extended_timeout"] = string_to_delta(

944

524

client["last_approval_request"] = None

945

525

client["last_checked_ok"] = None

946

526

client["last_checker_status"] = -2

947

527

948

528

return settings

949

950

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

529

530

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

951

531

self.name = name

952

532

if server_settings is None:

953

533

server_settings = {}

954

534

self.server_settings = server_settings

955

535

# adding all client settings

956

for setting, value in settings.items():

536

for setting, value in settings.iteritems():

957

537

setattr(self, setting, value)

958

538

959

539

if self.enabled:

960

540

if not hasattr(self, "last_enabled"):

961

541

self.last_enabled = datetime.datetime.utcnow()

965

545

else:

966

546

self.last_enabled = None

967

547

self.expires = None

968

548

969

549

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

970

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

550

# Uppercase and remove spaces from fingerprint for later

551

# comparison purposes with return value from the fingerprint()

552

# function

971

553

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

972

554

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

973

555

datetime.datetime.utcnow())

974

556

975

557

# attributes specific for this server instance

976

558

self.checker = None

977

559

self.checker_initiator_tag = None

980

562

self.current_checker_command = None

981

563

self.approved = None

982

564

self.approvals_pending = 0

983

self.changedstate = multiprocessing_manager.Condition(

984

multiprocessing_manager.Lock())

985

self.client_structure = [attr

986

for attr in self.__dict__.keys()

565

self.changedstate = (multiprocessing_manager

566

.Condition(multiprocessing_manager

567

.Lock()))

568

self.client_structure = [attr for attr in

569

self.__dict__.iterkeys()

987

570

if not attr.startswith("_")]

988

571

self.client_structure.append("client_structure")

989

990

for name, t in inspect.getmembers(

991

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

572

573

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

574

lambda obj:

575

isinstance(obj,

576

property)):

992

577

if not name.startswith("_"):

993

578

self.client_structure.append(name)

994

579

995

580

# Send notice to process children that client state has changed

996

581

def send_changedstate(self):

997

582

with self.changedstate:

998

583

self.changedstate.notify_all()

999

584

1000

585

def enable(self):

1001

586

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

1002

587

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

1007

592

self.last_enabled = datetime.datetime.utcnow()

1008

593

self.init_checker()

1009

594

self.send_changedstate()

1010

595

1011

596

def disable(self, quiet=True):

1012

597

"""Disable this client."""

1013

598

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

1015

600

if not quiet:

1016

601

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

1017

602

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

1018

GLib.source_remove(self.disable_initiator_tag)

603

gobject.source_remove(self.disable_initiator_tag)

1019

604

self.disable_initiator_tag = None

1020

605

self.expires = None

1021

606

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

1022

GLib.source_remove(self.checker_initiator_tag)

607

gobject.source_remove(self.checker_initiator_tag)

1023

608

self.checker_initiator_tag = None

1024

609

self.stop_checker()

1025

610

self.enabled = False

1026

611

if not quiet:

1027

612

self.send_changedstate()

1028

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

613

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

1029

614

return False

1030

615

1031

616

def __del__(self):

1032

617

self.disable()

1033

618

1034

619

def init_checker(self):

1035

620

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

1036

621

# and every interval from then on.

1037

622

if self.checker_initiator_tag is not None:

1038

GLib.source_remove(self.checker_initiator_tag)

1039

self.checker_initiator_tag = GLib.timeout_add(

1040

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

1041

self.start_checker)

623

gobject.source_remove(self.checker_initiator_tag)

624

self.checker_initiator_tag = (gobject.timeout_add

625

(self.interval_milliseconds(),

626

self.start_checker))

1042

627

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

1043

628

if self.disable_initiator_tag is not None:

1044

GLib.source_remove(self.disable_initiator_tag)

1045

self.disable_initiator_tag = GLib.timeout_add(

1046

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

629

gobject.source_remove(self.disable_initiator_tag)

630

self.disable_initiator_tag = (gobject.timeout_add

631

(self.timeout_milliseconds(),

632

self.disable))

1047

633

# Also start a new checker *right now*.

1048

634

self.start_checker()

1049

1050

def checker_callback(self, source, condition, connection,

1051

command):

635

636

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

1052

637

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

1053

# Read return code from connection (see call_pipe)

1054

returncode = connection.recv()

1055

connection.close()

1056

if self.checker is not None:

1057

self.checker.join()

1058

638

self.checker_callback_tag = None

1059

639

self.checker = None

1060

1061

if returncode >= 0:

1062

self.last_checker_status = returncode

1063

self.last_checker_signal = None

640

if os.WIFEXITED(condition):

641

self.last_checker_status = os.WEXITSTATUS(condition)

1064

642

if self.last_checker_status == 0:

1065

643

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

1066

644

vars(self))

1067

645

self.checked_ok()

1068

646

else:

1069

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

647

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

648

vars(self))

1070

649

else:

1071

650

self.last_checker_status = -1

1072

self.last_checker_signal = -returncode

1073

651

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

1074

652

vars(self))

1075

return False

1076

653

1077

654

def checked_ok(self):

1078

655

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

1079

656

self.last_checked_ok = datetime.datetime.utcnow()

1080

657

self.last_checker_status = 0

1081

self.last_checker_signal = None

1082

658

self.bump_timeout()

1083

659

1084

660

def bump_timeout(self, timeout=None):

1085

661

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

1086

662

if timeout is None:

1087

663

timeout = self.timeout

1088

664

if self.disable_initiator_tag is not None:

1089

GLib.source_remove(self.disable_initiator_tag)

665

gobject.source_remove(self.disable_initiator_tag)

1090

666

self.disable_initiator_tag = None

1091

667

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

1092

self.disable_initiator_tag = GLib.timeout_add(

1093

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

668

self.disable_initiator_tag = (gobject.timeout_add

669

(timedelta_to_milliseconds

670

(timeout), self.disable))

1094

671

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

1095

672

1096

673

def need_approval(self):

1097

674

self.last_approval_request = datetime.datetime.utcnow()

1098

675

1099

676

def start_checker(self):

1100

677

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

1101

678

1102

679

If a checker already exists, leave it running and do

1103

680

nothing."""

1104

681

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

1109

686

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

1110

687

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

1111

688

# should be.

1112

1113

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

1114

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

1115

self.checker.join()

1116

self.checker = None

689

690

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

691

try:

692

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

693

except AttributeError:

694

pass

695

except OSError as error:

696

if error.errno != errno.ECHILD:

697

raise

698

else:

699

if pid:

700

logger.warning("Checker was a zombie")

701

gobject.source_remove(self.checker_callback_tag)

702

self.checker_callback(pid, status,

703

self.current_checker_command)

1117

704

# Start a new checker if needed

1118

705

if self.checker is None:

1119

706

# Escape attributes for the shell

1120

escaped_attrs = {

1121

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

1122

for attr in self.runtime_expansions}

707

escaped_attrs = dict(

708

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

709

for attr in

710

self.runtime_expansions)

1123

711

try:

1124

712

command = self.checker_command % escaped_attrs

1125

713

except TypeError as error:

1126

714

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

1127

self.checker_command,

715

self.checker_command, exc_info=error)

716

return True # Try again later

717

self.current_checker_command = command

718

try:

719

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

720

command, self.name)

721

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

722

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

723

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

724

# always replaced by /dev/null.)

725

# The exception is when not debugging but nevertheless

726

# running in the foreground; use the previously

727

# created wnull.

728

popen_args = {}

729

if (not self.server_settings["debug"]

730

and self.server_settings["foreground"]):

731

popen_args.update({"stdout": wnull,

732

"stderr": wnull })

733

self.checker = subprocess.Popen(command,

734

close_fds=True,

735

shell=True, cwd="/",

736

**popen_args)

737

except OSError as error:

738

logger.error("Failed to start subprocess",

1128

739

exc_info=error)

1129

return True # Try again later

1130

self.current_checker_command = command

1131

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

1132

self.name)

1133

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

1134

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

1135

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

1136

# always replaced by /dev/null.)

1137

# The exception is when not debugging but nevertheless

1138

# running in the foreground; use the previously

1139

# created wnull.

1140

popen_args = {"close_fds": True,

1141

"shell": True,

1142

"cwd": "/"}

1143

if (not self.server_settings["debug"]

1144

and self.server_settings["foreground"]):

1145

popen_args.update({"stdout": wnull,

1146

"stderr": wnull})

1147

pipe = multiprocessing.Pipe(duplex=False)

1148

self.checker = multiprocessing.Process(

1149

target=call_pipe,

1150

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

1151

kwargs=popen_args)

1152

self.checker.start()

1153

self.checker_callback_tag = GLib.io_add_watch(

1154

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

1155

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

1156

self.checker_callback, pipe[0], command)

1157

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

740

return True

741

self.checker_callback_tag = (gobject.child_watch_add

742

(self.checker.pid,

743

self.checker_callback,

744

data=command))

745

# The checker may have completed before the gobject

746

# watch was added. Check for this.

747

try:

748

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

749

except OSError as error:

750

if error.errno == errno.ECHILD:

751

# This should never happen

752

logger.error("Child process vanished",

753

exc_info=error)

754

return True

755

raise

756

if pid:

757

gobject.source_remove(self.checker_callback_tag)

758

self.checker_callback(pid, status, command)

759

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

1158

760

return True

1159

761

1160

762

def stop_checker(self):

1161

763

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

1162

764

if self.checker_callback_tag:

1163

GLib.source_remove(self.checker_callback_tag)

765

gobject.source_remove(self.checker_callback_tag)

1164

766

self.checker_callback_tag = None

1165

767

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

1166

768

return

1167

769

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

1168

self.checker.terminate()

770

try:

771

self.checker.terminate()

772

#time.sleep(0.5)

773

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

774

# self.checker.kill()

775

except OSError as error:

776

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

777

raise

1169

778

self.checker = None

1170

779

1171

780

1172

def dbus_service_property(dbus_interface,

1173

signature="v",

1174

access="readwrite",

1175

byte_arrays=False):

781

def dbus_service_property(dbus_interface, signature="v",

782

access="readwrite", byte_arrays=False):

1176

783

"""Decorators for marking methods of a DBusObjectWithProperties to

1177

784

become properties on the D-Bus.

1178

785

1179

786

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

1180

787

and with one argument by "Set".

1181

788

1182

789

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

1183

790

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

1184

791

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

1187

794

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

1188

795

if byte_arrays and signature != "ay":

1189

796

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

1190

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

1191

797

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

1192

798

def decorator(func):

1193

799

func._dbus_is_property = True

1194

800

func._dbus_interface = dbus_interface

1197

803

func._dbus_name = func.__name__

1198

804

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

1199

805

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

1200

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

806

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1201

807

return func

1202

1203

808

return decorator

1204

809

1205

810

1206

811

def dbus_interface_annotations(dbus_interface):

1207

812

"""Decorator for marking functions returning interface annotations

1208

813

1209

814

Usage:

1210

815

1211

816

@dbus_interface_annotations("org.example.Interface")

1212

817

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

1213

818

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

1214

819

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

1215

820

"false"}

1216

821

"""

1217

1218

822

def decorator(func):

1219

823

func._dbus_is_interface = True

1220

824

func._dbus_interface = dbus_interface

1221

825

func._dbus_name = dbus_interface

1222

826

return func

1223

1224

827

return decorator

1225

828

1226

829

1227

830

def dbus_annotations(annotations):

1228

831

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

1229

832

Usage:

1230

1231

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

1232

"org.freedesktop.DBus.Property."

1233

"EmitsChangedSignal": "false"})

833

1234

834

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

1235

835

access="r")

836

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

837

"org.freedesktop.DBus.Property."

838

"EmitsChangedSignal": "false"})

1236

839

def Property_dbus_property(self):

1237

840

return dbus.Boolean(False)

1238

1239

See also the DBusObjectWithAnnotations class.

1240

841

"""

1241

1242

842

def decorator(func):

1243

843

func._dbus_annotations = annotations

1244

844

return func

1245

1246

845

return decorator

1247

846

1248

847

1249

848

class DBusPropertyException(dbus.exceptions.DBusException):

1250

849

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

1251

850

"""

1252

pass

851

def __unicode__(self):

852

return unicode(str(self))

1253

853

1254

854

1255

855

class DBusPropertyAccessException(DBusPropertyException):

1264

864

pass

1265

865

1266

866

1267

class DBusObjectWithAnnotations(dbus.service.Object):

1268

"""A D-Bus object with annotations.

1269

1270

Classes inheriting from this can use the dbus_annotations

1271

decorator to add annotations to methods or signals.

867

class DBusObjectWithProperties(dbus.service.Object):

868

"""A D-Bus object with properties.

869

870

Classes inheriting from this can use the dbus_service_property

871

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

872

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

1272

873

"""

1273

874

1274

875

@staticmethod

1275

876

def _is_dbus_thing(thing):

1276

877

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

1277

878

1278

879

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

1279

880

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

1280

881

"""

1281

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

882

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

1282

883

False)

1283

884

1284

885

def _get_all_dbus_things(self, thing):

1285

886

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

1286

887

"""

1287

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

888

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

889

name),

1288

890

athing.__get__(self))

1289

891

for cls in self.__class__.__mro__

1290

892

for name, athing in

1291

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

1292

1293

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1294

out_signature="s",

1295

path_keyword='object_path',

1296

connection_keyword='connection')

1297

def Introspect(self, object_path, connection):

1298

"""Overloading of standard D-Bus method.

1299

1300

Inserts annotation tags on methods and signals.

1301

"""

1302

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

1303

connection)

1304

try:

1305

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

1306

1307

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

1308

# Add annotation tags

1309

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

1310

for tag in if_tag.getElementsByTagName(typ):

1311

annots = dict()

1312

for name, prop in (self.

1313

_get_all_dbus_things(typ)):

1314

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

1315

and prop._dbus_interface

1316

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

1317

annots.update(getattr(

1318

prop, "_dbus_annotations", {}))

1319

for name, value in annots.items():

1320

ann_tag = document.createElement(

1321

"annotation")

1322

ann_tag.setAttribute("name", name)

1323

ann_tag.setAttribute("value", value)

1324

tag.appendChild(ann_tag)

1325

# Add interface annotation tags

1326

for annotation, value in dict(

1327

itertools.chain.from_iterable(

1328

annotations().items()

1329

for name, annotations

1330

in self._get_all_dbus_things("interface")

1331

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

1332

)).items():

1333

ann_tag = document.createElement("annotation")

1334

ann_tag.setAttribute("name", annotation)

1335

ann_tag.setAttribute("value", value)

1336

if_tag.appendChild(ann_tag)

1337

# Fix argument name for the Introspect method itself

1338

if (if_tag.getAttribute("name")

1339

== dbus.INTROSPECTABLE_IFACE):

1340

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

1341

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

1342

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

1343

if (arg.getAttribute("direction")

1344

== "out"):

1345

arg.setAttribute("name",

1346

"xml_data")

1347

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

1348

document.unlink()

1349

except (AttributeError, xml.dom.DOMException,

1350

xml.parsers.expat.ExpatError) as error:

1351

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

1352

exc_info=error)

1353

return xmlstring

1354

1355

1356

class DBusObjectWithProperties(DBusObjectWithAnnotations):

1357

"""A D-Bus object with properties.

1358

1359

Classes inheriting from this can use the dbus_service_property

1360

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

1361

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

1362

"""

1363

893

inspect.getmembers(cls,

894

self._is_dbus_thing(thing)))

895

1364

896

def _get_dbus_property(self, interface_name, property_name):

1365

897

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

1366

898

property with the specified name and interface.

1367

899

"""

1368

for cls in self.__class__.__mro__:

1369

for name, value in inspect.getmembers(

1370

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

900

for cls in self.__class__.__mro__:

901

for name, value in (inspect.getmembers

902

(cls,

903

self._is_dbus_thing("property"))):

1371

904

if (value._dbus_name == property_name

1372

905

and value._dbus_interface == interface_name):

1373

906

return value.__get__(self)

1374

907

1375

908

# No such property

1376

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

1377

self.dbus_object_path, interface_name, property_name))

1378

1379

@classmethod

1380

def _get_all_interface_names(cls):

1381

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

1382

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

1383

"_dbus_interface", None)

1384

for x in (inspect.getmro(cls))

1385

for attr in dir(x))

1386

if name is not None)

1387

1388

@dbus.service.method(dbus.PROPERTIES_IFACE,

1389

in_signature="ss",

909

raise DBusPropertyNotFound(self.dbus_object_path + ":"

910

+ interface_name + "."

911

+ property_name)

912

913

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

1390

914

out_signature="v")

1391

915

def Get(self, interface_name, property_name):

1392

916

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

1398

922

if not hasattr(value, "variant_level"):

1399

923

return value

1400

924

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

1401

925

1402

926

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

1403

927

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

1404

928

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

1410

934

# The byte_arrays option is not supported yet on

1411

935

# signatures other than "ay".

1412

936

if prop._dbus_signature != "ay":

1413

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

1414

"'ay' signature {!r}"

1415

.format(prop._dbus_signature))

937

raise ValueError

1416

938

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

1417

939

for byte in value))

1418

940

prop(value)

1419

1420

@dbus.service.method(dbus.PROPERTIES_IFACE,

1421

in_signature="s",

941

942

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

1422

943

out_signature="a{sv}")

1423

944

def GetAll(self, interface_name):

1424

945

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

1425

946

standard.

1426

947

1427

948

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

1428

949

"""

1429

950

properties = {}

1439

960

if not hasattr(value, "variant_level"):

1440

961

properties[name] = value

1441

962

continue

1442

properties[name] = type(value)(

1443

value, variant_level=value.variant_level + 1)

963

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

964

value.variant_level+1)

1444

965

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

1445

1446

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

1447

def PropertiesChanged(self, interface_name, changed_properties,

1448

invalidated_properties):

1449

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

1450

standard.

1451

"""

1452

pass

1453

966

1454

967

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1455

968

out_signature="s",

1456

969

path_keyword='object_path',

1457

970

connection_keyword='connection')

1458

971

def Introspect(self, object_path, connection):

1459

972

"""Overloading of standard D-Bus method.

1460

973

1461

974

Inserts property tags and interface annotation tags.

1462

975

"""

1463

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1464

object_path,

1465

connection)

976

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

977

connection)

1466

978

try:

1467

979

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

1468

1469

980

def make_tag(document, name, prop):

1470

981

e = document.createElement("property")

1471

982

e.setAttribute("name", name)

1472

983

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

1473

984

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

1474

985

return e

1475

1476

986

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

1477

987

# Add property tags

1478

988

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

1481

991

if prop._dbus_interface

1482

992

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

1483

993

if_tag.appendChild(tag)

1484

# Add annotation tags for properties

1485

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

1486

annots = dict()

1487

for name, prop in self._get_all_dbus_things(

1488

"property"):

1489

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

1490

and prop._dbus_interface

1491

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

1492

annots.update(getattr(

1493

prop, "_dbus_annotations", {}))

1494

for name, value in annots.items():

1495

ann_tag = document.createElement(

1496

"annotation")

1497

ann_tag.setAttribute("name", name)

1498

ann_tag.setAttribute("value", value)

1499

tag.appendChild(ann_tag)

994

# Add annotation tags

995

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

996

for tag in if_tag.getElementsByTagName(typ):

997

annots = dict()

998

for name, prop in (self.

999

_get_all_dbus_things(typ)):

1000

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

1001

and prop._dbus_interface

1002

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

1003

annots.update(getattr

1004

(prop,

1005

"_dbus_annotations",

1006

{}))

1007

for name, value in annots.iteritems():

1008

ann_tag = document.createElement(

1009

"annotation")

1010

ann_tag.setAttribute("name", name)

1011

ann_tag.setAttribute("value", value)

1012

tag.appendChild(ann_tag)

1013

# Add interface annotation tags

1014

for annotation, value in dict(

1015

itertools.chain.from_iterable(

1016

annotations().iteritems()

1017

for name, annotations in

1018

self._get_all_dbus_things("interface")

1019

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

1020

)).iteritems():

1021

ann_tag = document.createElement("annotation")

1022

ann_tag.setAttribute("name", annotation)

1023

ann_tag.setAttribute("value", value)

1024

if_tag.appendChild(ann_tag)

1500

1025

# Add the names to the return values for the

1501

1026

# "org.freedesktop.DBus.Properties" methods

1502

1027

if (if_tag.getAttribute("name")

1521

1046

return xmlstring

1522

1047

1523

1048

1524

try:

1525

dbus.OBJECT_MANAGER_IFACE

1526

except AttributeError:

1527

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

1528

1529

1530

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1531

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

1532

1533

Classes inheriting from this exposes the standard

1534

GetManagedObjects call and the InterfacesAdded and

1535

InterfacesRemoved signals on the standard

1536

"org.freedesktop.DBus.ObjectManager" interface.

1537

1538

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

1539

manually.

1540

"""

1541

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1542

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

1543

def GetManagedObjects(self):

1544

"""This function must be overridden"""

1545

raise NotImplementedError()

1546

1547

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1548

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

1549

def InterfacesAdded(self, object_path, interfaces_and_properties):

1550

pass

1551

1552

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

1553

def InterfacesRemoved(self, object_path, interfaces):

1554

pass

1555

1556

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1557

out_signature="s",

1558

path_keyword='object_path',

1559

connection_keyword='connection')

1560

def Introspect(self, object_path, connection):

1561

"""Overloading of standard D-Bus method.

1562

1563

Override return argument name of GetManagedObjects to be

1564

"objpath_interfaces_and_properties"

1565

"""

1566

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1567

object_path,

1568

connection)

1569

try:

1570

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

1571

1572

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

1573

# Fix argument name for the GetManagedObjects method

1574

if (if_tag.getAttribute("name")

1575

== dbus.OBJECT_MANAGER_IFACE):

1576

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

1577

if (cn.getAttribute("name")

1578

== "GetManagedObjects"):

1579

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

1580

if (arg.getAttribute("direction")

1581

== "out"):

1582

arg.setAttribute(

1583

"name",

1584

"objpath_interfaces"

1585

"_and_properties")

1586

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

1587

document.unlink()

1588

except (AttributeError, xml.dom.DOMException,

1589

xml.parsers.expat.ExpatError) as error:

1590

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

1591

exc_info=error)

1592

return xmlstring

1593

1594

1595

1049

def datetime_to_dbus(dt, variant_level=0):

1596

1050

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

1597

1051

if dt is None:

1598

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

1599

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

1052

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

1053

return dbus.String(dt.isoformat(),

1054

variant_level=variant_level)

1600

1055

1601

1056

1602

1057

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1604

1059

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

1605

1060

interface names according to the "alt_interface_names" mapping.

1606

1061

Usage:

1607

1062

1608

1063

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

1609

1064

"net.example.AlternateInterface"})

1610

1065

class SampleDBusObject(dbus.service.Object):

1611

1066

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

1612

1067

def SampleDBusMethod():

1613

1068

pass

1614

1069

1615

1070

The above "SampleDBusMethod" on "SampleDBusObject" will be

1616

1071

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

1617

1072

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

1618

1073

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

1619

1074

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

1620

1075

1621

1076

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

1622

1077

(from DBusObjectWithProperties) and interfaces (from the

1623

1078

dbus_interface_annotations decorator).

1624

1079

"""

1625

1626

1080

def wrapper(cls):

1627

1081

for orig_interface_name, alt_interface_name in (

1628

alt_interface_names.items()):

1082

alt_interface_names.iteritems()):

1629

1083

attr = {}

1630

1084

interface_names = set()

1631

1085

# Go though all attributes of the class

1633

1087

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

1634

1088

# with the wrong interface name

1635

1089

if (not hasattr(attribute, "_dbus_interface")

1636

or not attribute._dbus_interface.startswith(

1637

orig_interface_name)):

1090

or not attribute._dbus_interface

1091

.startswith(orig_interface_name)):

1638

1092

continue

1639

1093

# Create an alternate D-Bus interface name based on

1640

1094

# the current name

1641

alt_interface = attribute._dbus_interface.replace(

1642

orig_interface_name, alt_interface_name)

1095

alt_interface = (attribute._dbus_interface

1096

.replace(orig_interface_name,

1097

alt_interface_name))

1643

1098

interface_names.add(alt_interface)

1644

1099

# Is this a D-Bus signal?

1645

1100

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

1646

1101

# Extract the original non-method undecorated

1647

1102

# function by black magic

1648

if sys.version_info.major == 2:

1649

nonmethod_func = (dict(

1103

nonmethod_func = (dict(

1650

1104

zip(attribute.func_code.co_freevars,

1651

attribute.__closure__))

1652

["func"].cell_contents)

1653

else:

1654

nonmethod_func = (dict(

1655

zip(attribute.__code__.co_freevars,

1656

attribute.__closure__))

1657

["func"].cell_contents)

1105

attribute.__closure__))["func"]

1106

.cell_contents)

1658

1107

# Create a new, but exactly alike, function

1659

1108

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

1660

1109

# with the alternate D-Bus interface name

1661

new_function = copy_function(nonmethod_func)

1662

new_function = (dbus.service.signal(

1663

alt_interface,

1664

attribute._dbus_signature)(new_function))

1110

new_function = (dbus.service.signal

1111

(alt_interface,

1112

attribute._dbus_signature)

1113

(types.FunctionType(

1114

nonmethod_func.func_code,

1115

nonmethod_func.func_globals,

1116

nonmethod_func.func_name,

1117

nonmethod_func.func_defaults,

1118

nonmethod_func.func_closure)))

1665

1119

# Copy annotations, if any

1666

1120

try:

1667

new_function._dbus_annotations = dict(

1668

attribute._dbus_annotations)

1121

new_function._dbus_annotations = (

1122

dict(attribute._dbus_annotations))

1669

1123

except AttributeError:

1670

1124

pass

1671

1672

1125

# Define a creator of a function to call both the

1673

1126

# original and alternate functions, so both the

1674

1127

# original and alternate signals gets sent when

1677

1130

"""This function is a scope container to pass

1678

1131

func1 and func2 to the "call_both" function

1679

1132

outside of its arguments"""

1680

1681

@functools.wraps(func2)

1682

1133

def call_both(*args, **kwargs):

1683

1134

"""This function will emit two D-Bus

1684

1135

signals by calling func1 and func2"""

1685

1136

func1(*args, **kwargs)

1686

1137

func2(*args, **kwargs)

1687

# Make wrapper function look like a D-Bus

1688

# signal

1689

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

1690

if name.startswith("_dbus_"):

1691

setattr(call_both, name, attr)

1692

1693

1138

return call_both

1694

1139

# Create the "call_both" function and add it to

1695

1140

# the class

1700

1145

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

1701

1146

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

1702

1147

# to the class.

1703

attr[attrname] = (

1704

dbus.service.method(

1705

alt_interface,

1706

attribute._dbus_in_signature,

1707

attribute._dbus_out_signature)

1708

(copy_function(attribute)))

1148

attr[attrname] = (dbus.service.method

1149

(alt_interface,

1150

attribute._dbus_in_signature,

1151

attribute._dbus_out_signature)

1152

(types.FunctionType

1153

(attribute.func_code,

1154

attribute.func_globals,

1155

attribute.func_name,

1156

attribute.func_defaults,

1157

attribute.func_closure)))

1709

1158

# Copy annotations, if any

1710

1159

try:

1711

attr[attrname]._dbus_annotations = dict(

1712

attribute._dbus_annotations)

1160

attr[attrname]._dbus_annotations = (

1161

dict(attribute._dbus_annotations))

1713

1162

except AttributeError:

1714

1163

pass

1715

1164

# Is this a D-Bus property?

1718

1167

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

1719

1168

# property with the alternate D-Bus interface

1720

1169

# name. Add it to the class.

1721

attr[attrname] = (dbus_service_property(

1722

alt_interface, attribute._dbus_signature,

1723

attribute._dbus_access,

1724

attribute._dbus_get_args_options

1725

["byte_arrays"])

1726

(copy_function(attribute)))

1170

attr[attrname] = (dbus_service_property

1171

(alt_interface,

1172

attribute._dbus_signature,

1173

attribute._dbus_access,

1174

attribute

1175

._dbus_get_args_options

1176

["byte_arrays"])

1177

(types.FunctionType

1178

(attribute.func_code,

1179

attribute.func_globals,

1180

attribute.func_name,

1181

attribute.func_defaults,

1182

attribute.func_closure)))

1727

1183

# Copy annotations, if any

1728

1184

try:

1729

attr[attrname]._dbus_annotations = dict(

1730

attribute._dbus_annotations)

1185

attr[attrname]._dbus_annotations = (

1186

dict(attribute._dbus_annotations))

1731

1187

except AttributeError:

1732

1188

pass

1733

1189

# Is this a D-Bus interface?

1736

1192

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

1737

1193

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

1738

1194

# to the class.

1739

attr[attrname] = (

1740

dbus_interface_annotations(alt_interface)

1741

(copy_function(attribute)))

1195

attr[attrname] = (dbus_interface_annotations

1196

(alt_interface)

1197

(types.FunctionType

1198

(attribute.func_code,

1199

attribute.func_globals,

1200

attribute.func_name,

1201

attribute.func_defaults,

1202

attribute.func_closure)))

1742

1203

if deprecate:

1743

1204

# Deprecate all alternate interfaces

1744

iname = "_AlternateDBusNames_interface_annotation{}"

1205

iname="_AlternateDBusNames_interface_annotation{0}"

1745

1206

for interface_name in interface_names:

1746

1747

1207

@dbus_interface_annotations(interface_name)

1748

1208

def func(self):

1749

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

1750

"true"}

1209

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

1210

"true" }

1751

1211

# Find an unused name

1752

1212

for aname in (iname.format(i)

1753

1213

for i in itertools.count()):

1757

1217

if interface_names:

1758

1218

# Replace the class with a new subclass of it with

1759

1219

# methods, signals, etc. as created above.

1760

if sys.version_info.major == 2:

1761

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

1762

(cls, ), attr)

1763

else:

1764

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

1765

(cls, ), attr)

1220

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

1221

(cls,), attr)

1766

1222

return cls

1767

1768

1223

return wrapper

1769

1224

1770

1225

1771

1226

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

1772

"se.bsnet.fukt.Mandos"})

1227

"se.bsnet.fukt.Mandos"})

1773

1228

class ClientDBus(Client, DBusObjectWithProperties):

1774

1229

"""A Client class using D-Bus

1775

1230

1776

1231

Attributes:

1777

1232

dbus_object_path: dbus.ObjectPath

1778

1233

bus: dbus.SystemBus()

1779

1234

"""

1780

1235

1781

1236

runtime_expansions = (Client.runtime_expansions

1782

+ ("dbus_object_path", ))

1783

1784

_interface = "se.recompile.Mandos.Client"

1785

1237

+ ("dbus_object_path",))

1238

1786

1239

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

1787

1788

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

1240

1241

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

1789

1242

self.bus = bus

1790

1243

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

1791

1244

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

1792

1245

# the D-Bus

1793

client_object_name = str(self.name).translate(

1246

client_object_name = unicode(self.name).translate(

1794

1247

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

1795

1248

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

1796

self.dbus_object_path = dbus.ObjectPath(

1797

"/clients/" + client_object_name)

1249

self.dbus_object_path = (dbus.ObjectPath

1250

("/clients/" + client_object_name))

1798

1251

DBusObjectWithProperties.__init__(self, self.bus,

1799

1252

self.dbus_object_path)

1800

1801

def notifychangeproperty(transform_func, dbus_name,

1802

type_func=lambda x: x,

1803

variant_level=1,

1804

invalidate_only=False,

1805

_interface=_interface):

1253

1254

def notifychangeproperty(transform_func,

1255

dbus_name, type_func=lambda x: x,

1256

variant_level=1):

1806

1257

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

1807

1258

its changes to DBus.

1808

1259

1809

1260

transform_fun: Function that takes a value and a variant_level

1810

1261

and transforms it to a D-Bus type.

1811

1262

dbus_name: D-Bus name of the variable

1813

1264

to the D-Bus. Default: no transform

1814

1265

variant_level: D-Bus variant level. Default: 1

1815

1266

"""

1816

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

1817

1267

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

1818

1268

def setter(self, value):

1819

1269

if hasattr(self, "dbus_object_path"):

1820

1270

if (not hasattr(self, attrname) or

1821

1271

type_func(getattr(self, attrname, None))

1822

1272

!= type_func(value)):

1823

if invalidate_only:

1824

self.PropertiesChanged(

1825

_interface, dbus.Dictionary(),

1826

dbus.Array((dbus_name, )))

1827

else:

1828

dbus_value = transform_func(

1829

type_func(value),

1830

variant_level=variant_level)

1831

self.PropertyChanged(dbus.String(dbus_name),

1832

dbus_value)

1833

self.PropertiesChanged(

1834

_interface,

1835

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

1836

dbus_value}),

1837

dbus.Array())

1273

dbus_value = transform_func(type_func(value),

1274

variant_level

1275

=variant_level)

1276

self.PropertyChanged(dbus.String(dbus_name),

1277

dbus_value)

1838

1278

setattr(self, attrname, value)

1839

1279

1840

1280

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

1841

1281

1842

1282

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1843

1283

approvals_pending = notifychangeproperty(dbus.Boolean,

1844

1284

"ApprovalPending",

1845

type_func=bool)

1285

type_func = bool)

1846

1286

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

1847

1287

last_enabled = notifychangeproperty(datetime_to_dbus,

1848

1288

"LastEnabled")

1849

checker = notifychangeproperty(

1850

dbus.Boolean, "CheckerRunning",

1851

type_func=lambda checker: checker is not None)

1289

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

1290

type_func = lambda checker:

1291

checker is not None)

1852

1292

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1853

1293

"LastCheckedOK")

1854

1294

last_checker_status = notifychangeproperty(dbus.Int16,

1857

1297

datetime_to_dbus, "LastApprovalRequest")

1858

1298

approved_by_default = notifychangeproperty(dbus.Boolean,

1859

1299

"ApprovedByDefault")

1860

approval_delay = notifychangeproperty(

1861

dbus.UInt64, "ApprovalDelay",

1862

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

1300

approval_delay = notifychangeproperty(dbus.UInt64,

1301

"ApprovalDelay",

1302

type_func =

1303

timedelta_to_milliseconds)

1863

1304

approval_duration = notifychangeproperty(

1864

1305

dbus.UInt64, "ApprovalDuration",

1865

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

1306

type_func = timedelta_to_milliseconds)

1866

1307

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

1867

timeout = notifychangeproperty(

1868

dbus.UInt64, "Timeout",

1869

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

1308

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

1309

type_func =

1310

timedelta_to_milliseconds)

1870

1311

extended_timeout = notifychangeproperty(

1871

1312

dbus.UInt64, "ExtendedTimeout",

1872

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

1873

interval = notifychangeproperty(

1874

dbus.UInt64, "Interval",

1875

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

1313

type_func = timedelta_to_milliseconds)

1314

interval = notifychangeproperty(dbus.UInt64,

1315

"Interval",

1316

type_func =

1317

timedelta_to_milliseconds)

1876

1318

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

1877

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

1878

invalidate_only=True)

1879

1319

1880

1320

del notifychangeproperty

1881

1321

1882

1322

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

1883

1323

try:

1884

1324

self.remove_from_connection()

1887

1327

if hasattr(DBusObjectWithProperties, "__del__"):

1888

1328

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

1889

1329

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

1890

1891

def checker_callback(self, source, condition,

1892

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

1893

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

1894

connection, command, *args,

1895

**kwargs)

1896

exitstatus = self.last_checker_status

1897

if exitstatus >= 0:

1330

1331

def checker_callback(self, pid, condition, command,

1332

*args, **kwargs):

1333

self.checker_callback_tag = None

1334

self.checker = None

1335

if os.WIFEXITED(condition):

1336

exitstatus = os.WEXITSTATUS(condition)

1898

1337

# Emit D-Bus signal

1899

1338

self.CheckerCompleted(dbus.Int16(exitstatus),

1900

# This is specific to GNU libC

1901

dbus.Int64(exitstatus << 8),

1339

dbus.Int64(condition),

1902

1340

dbus.String(command))

1903

1341

else:

1904

1342

# Emit D-Bus signal

1905

1343

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

1906

dbus.Int64(

1907

# This is specific to GNU libC

1908

(exitstatus << 8)

1909

| self.last_checker_signal),

1344

dbus.Int64(condition),

1910

1345

dbus.String(command))

1911

return ret

1912

1346

1347

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

1348

*args, **kwargs)

1349

1913

1350

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

1914

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

1351

old_checker = self.checker

1352

if self.checker is not None:

1353

old_checker_pid = self.checker.pid

1354

else:

1355

old_checker_pid = None

1915

1356

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

1916

1357

# Only if new checker process was started

1917

1358

if (self.checker is not None

1919

1360

# Emit D-Bus signal

1920

1361

self.CheckerStarted(self.current_checker_command)

1921

1362

return r

1922

1363

1923

1364

def _reset_approved(self):

1924

1365

self.approved = None

1925

1366

return False

1926

1367

1927

1368

def approve(self, value=True):

1928

1369

self.approved = value

1929

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

1930

* 1000), self._reset_approved)

1370

gobject.timeout_add(timedelta_to_milliseconds

1371

(self.approval_duration),

1372

self._reset_approved)

1931

1373

self.send_changedstate()

1932

1933

# D-Bus methods, signals & properties

1934

1935

# Interfaces

1936

1937

# Signals

1938

1374

1375

## D-Bus methods, signals & properties

1376

_interface = "se.recompile.Mandos.Client"

1377

1378

## Interfaces

1379

1380

@dbus_interface_annotations(_interface)

1381

def _foo(self):

1382

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

1383

"false"}

1384

1385

## Signals

1386

1939

1387

# CheckerCompleted - signal

1940

1388

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

1941

1389

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

1942

1390

"D-Bus signal"

1943

1391

pass

1944

1392

1945

1393

# CheckerStarted - signal

1946

1394

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

1947

1395

def CheckerStarted(self, command):

1948

1396

"D-Bus signal"

1949

1397

pass

1950

1398

1951

1399

# PropertyChanged - signal

1952

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

1953

1400

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

1954

1401

def PropertyChanged(self, property, value):

1955

1402

"D-Bus signal"

1956

1403

pass

1957

1404

1958

1405

# GotSecret - signal

1959

1406

@dbus.service.signal(_interface)

1960

1407

def GotSecret(self):

1963

1410

server to mandos-client

1964

1411

"""

1965

1412

pass

1966

1413

1967

1414

# Rejected - signal

1968

1415

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

1969

1416

def Rejected(self, reason):

1970

1417

"D-Bus signal"

1971

1418

pass

1972

1419

1973

1420

# NeedApproval - signal

1974

1421

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

1975

1422

def NeedApproval(self, timeout, default):

1976

1423

"D-Bus signal"

1977

1424

return self.need_approval()

1978

1979

# Methods

1980

1425

1426

## Methods

1427

1981

1428

# Approve - method

1982

1429

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

1983

1430

def Approve(self, value):

1984

1431

self.approve(value)

1985

1432

1986

1433

# CheckedOK - method

1987

1434

@dbus.service.method(_interface)

1988

1435

def CheckedOK(self):

1989

1436

self.checked_ok()

1990

1437

1991

1438

# Enable - method

1992

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

1993

1439

@dbus.service.method(_interface)

1994

1440

def Enable(self):

1995

1441

"D-Bus method"

1996

1442

self.enable()

1997

1443

1998

1444

# StartChecker - method

1999

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

2000

1445

@dbus.service.method(_interface)

2001

1446

def StartChecker(self):

2002

1447

"D-Bus method"

2003

1448

self.start_checker()

2004

1449

2005

1450

# Disable - method

2006

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

2007

1451

@dbus.service.method(_interface)

2008

1452

def Disable(self):

2009

1453

"D-Bus method"

2010

1454

self.disable()

2011

1455

2012

1456

# StopChecker - method

2013

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

2014

1457

@dbus.service.method(_interface)

2015

1458

def StopChecker(self):

2016

1459

self.stop_checker()

2017

2018

# Properties

2019

1460

1461

## Properties

1462

2020

1463

# ApprovalPending - property

2021

1464

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

2022

1465

def ApprovalPending_dbus_property(self):

2023

1466

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

2024

1467

2025

1468

# ApprovedByDefault - property

2026

@dbus_service_property(_interface,

2027

signature="b",

1469

@dbus_service_property(_interface, signature="b",

2028

1470

access="readwrite")

2029

1471

def ApprovedByDefault_dbus_property(self, value=None):

2030

1472

if value is None: # get

2031

1473

return dbus.Boolean(self.approved_by_default)

2032

1474

self.approved_by_default = bool(value)

2033

1475

2034

1476

# ApprovalDelay - property

2035

@dbus_service_property(_interface,

2036

signature="t",

1477

@dbus_service_property(_interface, signature="t",

2037

1478

access="readwrite")

2038

1479

def ApprovalDelay_dbus_property(self, value=None):

2039

1480

if value is None: # get

2040

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

2041

* 1000)

1481

return dbus.UInt64(self.approval_delay_milliseconds())

2042

1482

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

2043

1483

2044

1484

# ApprovalDuration - property

2045

@dbus_service_property(_interface,

2046

signature="t",

1485

@dbus_service_property(_interface, signature="t",

2047

1486

access="readwrite")

2048

1487

def ApprovalDuration_dbus_property(self, value=None):

2049

1488

if value is None: # get

2050

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

2051

* 1000)

1489

return dbus.UInt64(timedelta_to_milliseconds(

1490

self.approval_duration))

2052

1491

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

2053

1492

2054

1493

# Name - property

2055

@dbus_annotations(

2056

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

2057

1494

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

2058

1495

def Name_dbus_property(self):

2059

1496

return dbus.String(self.name)

2060

2061

# KeyID - property

2062

@dbus_annotations(

2063

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

2064

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

2065

def KeyID_dbus_property(self):

2066

return dbus.String(self.key_id)

2067

1497

2068

1498

# Fingerprint - property

2069

@dbus_annotations(

2070

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

2071

1499

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

2072

1500

def Fingerprint_dbus_property(self):

2073

1501

return dbus.String(self.fingerprint)

2074

1502

2075

1503

# Host - property

2076

@dbus_service_property(_interface,

2077

signature="s",

1504

@dbus_service_property(_interface, signature="s",

2078

1505

access="readwrite")

2079

1506

def Host_dbus_property(self, value=None):

2080

1507

if value is None: # get

2081

1508

return dbus.String(self.host)

2082

self.host = str(value)

2083

1509

self.host = unicode(value)

1510

2084

1511

# Created - property

2085

@dbus_annotations(

2086

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

2087

1512

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

2088

1513

def Created_dbus_property(self):

2089

1514

return datetime_to_dbus(self.created)

2090

1515

2091

1516

# LastEnabled - property

2092

1517

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

2093

1518

def LastEnabled_dbus_property(self):

2094

1519

return datetime_to_dbus(self.last_enabled)

2095

1520

2096

1521

# Enabled - property

2097

@dbus_service_property(_interface,

2098

signature="b",

1522

@dbus_service_property(_interface, signature="b",

2099

1523

access="readwrite")

2100

1524

def Enabled_dbus_property(self, value=None):

2101

1525

if value is None: # get

2104

1528

self.enable()

2105

1529

else:

2106

1530

self.disable()

2107

1531

2108

1532

# LastCheckedOK - property

2109

@dbus_service_property(_interface,

2110

signature="s",

1533

@dbus_service_property(_interface, signature="s",

2111

1534

access="readwrite")

2112

1535

def LastCheckedOK_dbus_property(self, value=None):

2113

1536

if value is not None:

2114

1537

self.checked_ok()

2115

1538

return

2116

1539

return datetime_to_dbus(self.last_checked_ok)

2117

1540

2118

1541

# LastCheckerStatus - property

2119

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

1542

@dbus_service_property(_interface, signature="n",

1543

access="read")

2120

1544

def LastCheckerStatus_dbus_property(self):

2121

1545

return dbus.Int16(self.last_checker_status)

2122

1546

2123

1547

# Expires - property

2124

1548

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

2125

1549

def Expires_dbus_property(self):

2126

1550

return datetime_to_dbus(self.expires)

2127

1551

2128

1552

# LastApprovalRequest - property

2129

1553

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

2130

1554

def LastApprovalRequest_dbus_property(self):

2131

1555

return datetime_to_dbus(self.last_approval_request)

2132

1556

2133

1557

# Timeout - property

2134

@dbus_service_property(_interface,

2135

signature="t",

1558

@dbus_service_property(_interface, signature="t",

2136

1559

access="readwrite")

2137

1560

def Timeout_dbus_property(self, value=None):

2138

1561

if value is None: # get

2139

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

1562

return dbus.UInt64(self.timeout_milliseconds())

2140

1563

old_timeout = self.timeout

2141

1564

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

2142

1565

# Reschedule disabling

2150

1573

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

2151

1574

is None):

2152

1575

return

2153

GLib.source_remove(self.disable_initiator_tag)

2154

self.disable_initiator_tag = GLib.timeout_add(

2155

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

2156

self.disable)

2157

1576

gobject.source_remove(self.disable_initiator_tag)

1577

self.disable_initiator_tag = (

1578

gobject.timeout_add(

1579

timedelta_to_milliseconds(self.expires - now),

1580

self.disable))

1581

2158

1582

# ExtendedTimeout - property

2159

@dbus_service_property(_interface,

2160

signature="t",

1583

@dbus_service_property(_interface, signature="t",

2161

1584

access="readwrite")

2162

1585

def ExtendedTimeout_dbus_property(self, value=None):

2163

1586

if value is None: # get

2164

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

2165

* 1000)

1587

return dbus.UInt64(self.extended_timeout_milliseconds())

2166

1588

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

2167

1589

2168

1590

# Interval - property

2169

@dbus_service_property(_interface,

2170

signature="t",

1591

@dbus_service_property(_interface, signature="t",

2171

1592

access="readwrite")

2172

1593

def Interval_dbus_property(self, value=None):

2173

1594

if value is None: # get

2174

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

1595

return dbus.UInt64(self.interval_milliseconds())

2175

1596

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

2176

1597

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

2177

1598

return

2178

1599

if self.enabled:

2179

1600

# Reschedule checker run

2180

GLib.source_remove(self.checker_initiator_tag)

2181

self.checker_initiator_tag = GLib.timeout_add(

2182

value, self.start_checker)

2183

self.start_checker() # Start one now, too

2184

1601

gobject.source_remove(self.checker_initiator_tag)

1602

self.checker_initiator_tag = (gobject.timeout_add

1603

(value, self.start_checker))

1604

self.start_checker() # Start one now, too

1605

2185

1606

# Checker - property

2186

@dbus_service_property(_interface,

2187

signature="s",

1607

@dbus_service_property(_interface, signature="s",

2188

1608

access="readwrite")

2189

1609

def Checker_dbus_property(self, value=None):

2190

1610

if value is None: # get

2191

1611

return dbus.String(self.checker_command)

2192

self.checker_command = str(value)

2193

1612

self.checker_command = unicode(value)

1613

2194

1614

# CheckerRunning - property

2195

@dbus_service_property(_interface,

2196

signature="b",

1615

@dbus_service_property(_interface, signature="b",

2197

1616

access="readwrite")

2198

1617

def CheckerRunning_dbus_property(self, value=None):

2199

1618

if value is None: # get

2202

1621

self.start_checker()

2203

1622

else:

2204

1623

self.stop_checker()

2205

1624

2206

1625

# ObjectPath - property

2207

@dbus_annotations(

2208

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

2209

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

2210

1626

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

2211

1627

def ObjectPath_dbus_property(self):

2212

return self.dbus_object_path # is already a dbus.ObjectPath

2213

1628

return self.dbus_object_path # is already a dbus.ObjectPath

1629

2214

1630

# Secret = property

2215

@dbus_annotations(

2216

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

2217

"invalidates"})

2218

@dbus_service_property(_interface,

2219

signature="ay",

2220

access="write",

2221

byte_arrays=True)

1631

@dbus_service_property(_interface, signature="ay",

1632

access="write", byte_arrays=True)

2222

1633

def Secret_dbus_property(self, value):

2223

self.secret = bytes(value)

2224

1634

self.secret = str(value)

1635

2225

1636

del _interface

2226

1637

2227

1638

2228

class ProxyClient:

2229

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

1639

class ProxyClient(object):

1640

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

2230

1641

self._pipe = child_pipe

2231

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

1642

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

2232

1643

if not self._pipe.recv():

2233

raise KeyError(key_id or fpr)

2234

1644

raise KeyError()

1645

2235

1646

def __getattribute__(self, name):

2236

1647

if name == '_pipe':

2237

1648

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

2240

1651

if data[0] == 'data':

2241

1652

return data[1]

2242

1653

if data[0] == 'function':

2243

2244

1654

def func(*args, **kwargs):

2245

1655

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

2246

1656

return self._pipe.recv()[1]

2247

2248

1657

return func

2249

1658

2250

1659

def __setattr__(self, name, value):

2251

1660

if name == '_pipe':

2252

1661

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

2255

1664

2256

1665

class ClientHandler(socketserver.BaseRequestHandler, object):

2257

1666

"""A class to handle client connections.

2258

1667

2259

1668

Instantiated once for each connection to handle it.

2260

1669

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

2261

1670

2262

1671

def handle(self):

2263

1672

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

2264

1673

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

2265

str(self.client_address))

1674

unicode(self.client_address))

2266

1675

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

2267

1676

self.server.child_pipe.fileno())

2268

2269

session = gnutls.ClientSession(self.request)

2270

2271

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

2272

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

2273

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

2274

# "+DHE-DSS"))

1677

1678

session = (gnutls.connection

1679

.ClientSession(self.request,

1680

gnutls.connection

1681

.X509Credentials()))

1682

1683

# Note: gnutls.connection.X509Credentials is really a

1684

# generic GnuTLS certificate credentials object so long as

1685

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

1686

# here despite using OpenPGP certificates.

1687

1688

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

1689

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

1690

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

1691

# "+DHE-DSS"))

2275

1692

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

2276

1693

priority = self.server.gnutls_priority

2277

1694

if priority is None:

2278

1695

priority = "NORMAL"

2279

gnutls.priority_set_direct(session._c_object,

2280

priority.encode("utf-8"),

2281

None)

2282

1696

(gnutls.library.functions

1697

.gnutls_priority_set_direct(session._c_object,

1698

priority, None))

1699

2283

1700

# Start communication using the Mandos protocol

2284

1701

# Get protocol number

2285

1702

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

2290

1707

except (ValueError, IndexError, RuntimeError) as error:

2291

1708

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

2292

1709

return

2293

1710

2294

1711

# Start GnuTLS connection

2295

1712

try:

2296

1713

session.handshake()

2297

except gnutls.Error as error:

1714

except gnutls.errors.GNUTLSError as error:

2298

1715

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

2299

1716

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

2300

1717

# established. Just abandon the request.

2301

1718

return

2302

1719

logger.debug("Handshake succeeded")

2303

1720

2304

1721

approval_required = False

2305

1722

try:

2306

if gnutls.has_rawpk:

2307

fpr = b""

2308

try:

2309

key_id = self.key_id(

2310

self.peer_certificate(session))

2311

except (TypeError, gnutls.Error) as error:

2312

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

2313

return

2314

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

2315

2316

else:

2317

key_id = b""

2318

try:

2319

fpr = self.fingerprint(

2320

self.peer_certificate(session))

2321

except (TypeError, gnutls.Error) as error:

2322

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

2323

return

2324

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

2325

2326

try:

2327

client = ProxyClient(child_pipe, key_id, fpr,

1723

try:

1724

fpr = self.fingerprint(self.peer_certificate

1725

(session))

1726

except (TypeError,

1727

gnutls.errors.GNUTLSError) as error:

1728

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

1729

return

1730

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

1731

1732

try:

1733

client = ProxyClient(child_pipe, fpr,

2328

1734

self.client_address)

2329

1735

except KeyError:

2330

1736

return

2331

1737

2332

1738

if client.approval_delay:

2333

1739

delay = client.approval_delay

2334

1740

client.approvals_pending += 1

2335

1741

approval_required = True

2336

1742

2337

1743

while True:

2338

1744

if not client.enabled:

2339

1745

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

2340

client.name)

1746

client.name)

2341

1747

if self.server.use_dbus:

2342

1748

# Emit D-Bus signal

2343

1749

client.Rejected("Disabled")

2344

1750

return

2345

1751

2346

1752

if client.approved or not client.approval_delay:

2347

# We are approved or approval is disabled

1753

#We are approved or approval is disabled

2348

1754

break

2349

1755

elif client.approved is None:

2350

1756

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

2352

1758

if self.server.use_dbus:

2353

1759

# Emit D-Bus signal

2354

1760

client.NeedApproval(

2355

client.approval_delay.total_seconds()

2356

* 1000, client.approved_by_default)

1761

client.approval_delay_milliseconds(),

1762

client.approved_by_default)

2357

1763

else:

2358

1764

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

2359

1765

client.name)

2361

1767

# Emit D-Bus signal

2362

1768

client.Rejected("Denied")

2363

1769

return

2364

2365

# wait until timeout or approved

1770

1771

#wait until timeout or approved

2366

1772

time = datetime.datetime.now()

2367

1773

client.changedstate.acquire()

2368

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

1774

client.changedstate.wait(

1775

float(timedelta_to_milliseconds(delay)

1776

/ 1000))

2369

1777

client.changedstate.release()

2370

1778

time2 = datetime.datetime.now()

2371

1779

if (time2 - time) >= delay:

2381

1789

break

2382

1790

else:

2383

1791

delay -= time2 - time

2384

2385

try:

2386

session.send(client.secret)

2387

except gnutls.Error as error:

2388

logger.warning("gnutls send failed",

2389

exc_info=error)

2390

return

2391

1792

1793

sent_size = 0

1794

while sent_size < len(client.secret):

1795

try:

1796

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

1797

except gnutls.errors.GNUTLSError as error:

1798

logger.warning("gnutls send failed",

1799

exc_info=error)

1800

return

1801

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

1802

sent, len(client.secret)

1803

- (sent_size + sent))

1804

sent_size += sent

1805

2392

1806

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

2393

1807

# bump the timeout using extended_timeout

2394

1808

client.bump_timeout(client.extended_timeout)

2395

1809

if self.server.use_dbus:

2396

1810

# Emit D-Bus signal

2397

1811

client.GotSecret()

2398

1812

2399

1813

finally:

2400

1814

if approval_required:

2401

1815

client.approvals_pending -= 1

2402

1816

try:

2403

1817

session.bye()

2404

except gnutls.Error as error:

1818

except gnutls.errors.GNUTLSError as error:

2405

1819

logger.warning("GnuTLS bye failed",

2406

1820

exc_info=error)

2407

1821

2408

1822

@staticmethod

2409

1823

def peer_certificate(session):

2410

"Return the peer's certificate as a bytestring"

2411

try:

2412

cert_type = gnutls.certificate_type_get2(session._c_object,

2413

gnutls.CTYPE_PEERS)

2414

except AttributeError:

2415

cert_type = gnutls.certificate_type_get(session._c_object)

2416

if gnutls.has_rawpk:

2417

valid_cert_types = frozenset((gnutls.CRT_RAWPK,))

2418

else:

2419

valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))

2420

# If not a valid certificate type...

2421

if cert_type not in valid_cert_types:

2422

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

2423

valid_cert_types)

2424

# ...return invalid data

2425

return b""

1824

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

1825

# If not an OpenPGP certificate...

1826

if (gnutls.library.functions

1827

.gnutls_certificate_type_get(session._c_object)

1828

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1829

# ...do the normal thing

1830

return session.peer_certificate

2426

1831

list_size = ctypes.c_uint(1)

2427

cert_list = (gnutls.certificate_get_peers

1832

cert_list = (gnutls.library.functions

1833

.gnutls_certificate_get_peers

2428

1834

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

2429

1835

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

2430

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

1836

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

1837

" certificate")

2431

1838

if list_size.value == 0:

2432

1839

return None

2433

1840

cert = cert_list[0]

2434

1841

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

2435

2436

@staticmethod

2437

def key_id(certificate):

2438

"Convert a certificate bytestring to a hexdigit key ID"

2439

# New GnuTLS "datum" with the public key

2440

datum = gnutls.datum_t(

2441

ctypes.cast(ctypes.c_char_p(certificate),

2442

ctypes.POINTER(ctypes.c_ubyte)),

2443

ctypes.c_uint(len(certificate)))

2444

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

2445

# New empty GnuTLS certificate

2446

pubkey = gnutls.pubkey_t()

2447

gnutls.pubkey_init(ctypes.byref(pubkey))

2448

# Import the raw public key into the certificate

2449

gnutls.pubkey_import(pubkey,

2450

ctypes.byref(datum),

2451

gnutls.X509_FMT_DER)

2452

# New buffer for the key ID

2453

buf = ctypes.create_string_buffer(32)

2454

buf_len = ctypes.c_size_t(len(buf))

2455

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

2456

gnutls.pubkey_get_key_id(pubkey,

2457

gnutls.KEYID_USE_SHA256,

2458

ctypes.cast(ctypes.byref(buf),

2459

ctypes.POINTER(ctypes.c_ubyte)),

2460

ctypes.byref(buf_len))

2461

# Deinit the certificate

2462

gnutls.pubkey_deinit(pubkey)

2463

2464

# Convert the buffer to a Python bytestring

2465

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

2466

# Convert the bytestring to hexadecimal notation

2467

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

2468

return hex_key_id

2469

1842

2470

1843

@staticmethod

2471

1844

def fingerprint(openpgp):

2472

1845

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

2473

1846

# New GnuTLS "datum" with the OpenPGP public key

2474

datum = gnutls.datum_t(

2475

ctypes.cast(ctypes.c_char_p(openpgp),

2476

ctypes.POINTER(ctypes.c_ubyte)),

2477

ctypes.c_uint(len(openpgp)))

1847

datum = (gnutls.library.types

1848

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

1849

ctypes.POINTER

1850

(ctypes.c_ubyte)),

1851

ctypes.c_uint(len(openpgp))))

2478

1852

# New empty GnuTLS certificate

2479

crt = gnutls.openpgp_crt_t()

2480

gnutls.openpgp_crt_init(ctypes.byref(crt))

1853

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1854

(gnutls.library.functions

1855

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2481

1856

# Import the OpenPGP public key into the certificate

2482

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

2483

gnutls.OPENPGP_FMT_RAW)

1857

(gnutls.library.functions

1858

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

1859

gnutls.library.constants

1860

.GNUTLS_OPENPGP_FMT_RAW))

2484

1861

# Verify the self signature in the key

2485

1862

crtverify = ctypes.c_uint()

2486

gnutls.openpgp_crt_verify_self(crt, 0,

2487

ctypes.byref(crtverify))

1863

(gnutls.library.functions

1864

.gnutls_openpgp_crt_verify_self(crt, 0,

1865

ctypes.byref(crtverify)))

2488

1866

if crtverify.value != 0:

2489

gnutls.openpgp_crt_deinit(crt)

2490

raise gnutls.CertificateSecurityError(code

2491

=crtverify.value)

1867

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1868

raise (gnutls.errors.CertificateSecurityError

1869

("Verify failed"))

2492

1870

# New buffer for the fingerprint

2493

1871

buf = ctypes.create_string_buffer(20)

2494

1872

buf_len = ctypes.c_size_t()

2495

1873

# Get the fingerprint from the certificate into the buffer

2496

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

2497

ctypes.byref(buf_len))

1874

(gnutls.library.functions

1875

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

1876

ctypes.byref(buf_len)))

2498

1877

# Deinit the certificate

2499

gnutls.openpgp_crt_deinit(crt)

1878

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2500

1879

# Convert the buffer to a Python bytestring

2501

1880

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

2502

1881

# Convert the bytestring to hexadecimal notation

2504

1883

return hex_fpr

2505

1884

2506

1885

2507

class MultiprocessingMixIn:

1886

class MultiprocessingMixIn(object):

2508

1887

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

2509

2510

1888

def sub_process_main(self, request, address):

2511

1889

try:

2512

1890

self.finish_request(request, address)

2513

1891

except Exception:

2514

1892

self.handle_error(request, address)

2515

1893

self.close_request(request)

2516

1894

2517

1895

def process_request(self, request, address):

2518

1896

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

2519

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

2520

args=(request, address))

1897

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

1898

args = (request, address))

2521

1899

proc.start()

2522

1900

return proc

2523

1901

2524

1902

2525

class MultiprocessingMixInWithPipe(MultiprocessingMixIn):

1903

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2526

1904

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

2527

2528

1905

def process_request(self, request, client_address):

2529

1906

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

2530

1907

2531

1908

This function creates a new pipe in self.pipe

2532

1909

"""

2533

1910

parent_pipe, self.child_pipe = multiprocessing.Pipe()

2534

1911

2535

1912

proc = MultiprocessingMixIn.process_request(self, request,

2536

1913

client_address)

2537

1914

self.child_pipe.close()

2538

1915

self.add_pipe(parent_pipe, proc)

2539

1916

2540

1917

def add_pipe(self, parent_pipe, proc):

2541

1918

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

2542

1919

raise NotImplementedError()

2543

1920

2544

1921

2545

1922

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2546

socketserver.TCPServer):

1923

socketserver.TCPServer, object):

2547

1924

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

2548

1925

2549

1926

Attributes:

2550

1927

enabled: Boolean; whether this server is activated yet

2551

1928

interface: None or a network interface name (string)

2552

1929

use_ipv6: Boolean; to use IPv6 or not

2553

1930

"""

2554

2555

1931

def __init__(self, server_address, RequestHandlerClass,

2556

interface=None,

2557

use_ipv6=True,

2558

socketfd=None):

1932

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

2559

1933

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

2560

1934

creating a new one with socket.socket().

2561

1935

"""

2567

1941

self.socketfd = socketfd

2568

1942

# Save the original socket.socket() function

2569

1943

self.socket_socket = socket.socket

2570

2571

1944

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

2572

#

1945

#

2573

1946

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

2574

1947

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

2575

1948

# patching socket.socket.)

2576

#

1949

#

2577

1950

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

2578

1951

@functools.wraps(socket.socket)

2579

1952

def socket_wrapper(*args, **kwargs):

2591

1964

# socket_wrapper(), if socketfd was set.

2592

1965

socketserver.TCPServer.__init__(self, server_address,

2593

1966

RequestHandlerClass)

2594

1967

2595

1968

def server_bind(self):

2596

1969

"""This overrides the normal server_bind() function

2597

1970

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

2598

1971

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

2599

global SO_BINDTODEVICE

2600

1972

if self.interface is not None:

2601

1973

if SO_BINDTODEVICE is None:

2602

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

2603

# common enough.

2604

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

2605

SO_BINDTODEVICE = 25

2606

try:

2607

self.socket.setsockopt(

2608

socket.SOL_SOCKET, SO_BINDTODEVICE,

2609

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

2610

except socket.error as error:

2611

if error.errno == errno.EPERM:

2612

logger.error("No permission to bind to"

2613

" interface %s", self.interface)

2614

elif error.errno == errno.ENOPROTOOPT:

2615

logger.error("SO_BINDTODEVICE not available;"

2616

" cannot bind to interface %s",

2617

self.interface)

2618

elif error.errno == errno.ENODEV:

2619

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

2620

" cannot bind", self.interface)

2621

else:

2622

raise

1974

logger.error("SO_BINDTODEVICE does not exist;"

1975

" cannot bind to interface %s",

1976

self.interface)

1977

else:

1978

try:

1979

self.socket.setsockopt(socket.SOL_SOCKET,

1980

SO_BINDTODEVICE,

1981

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

1982

except socket.error as error:

1983

if error.errno == errno.EPERM:

1984

logger.error("No permission to bind to"

1985

" interface %s", self.interface)

1986

elif error.errno == errno.ENOPROTOOPT:

1987

logger.error("SO_BINDTODEVICE not available;"

1988

" cannot bind to interface %s",

1989

self.interface)

1990

elif error.errno == errno.ENODEV:

1991

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

1992

" cannot bind", self.interface)

1993

else:

1994

raise

2623

1995

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

2624

1996

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

2625

if self.server_address[1]:

2626

self.allow_reuse_address = True

2627

1997

if not self.server_address[0]:

2628

1998

if self.address_family == socket.AF_INET6:

2629

any_address = "::" # in6addr_any

1999

any_address = "::" # in6addr_any

2630

2000

else:

2631

any_address = "0.0.0.0" # INADDR_ANY

2001

any_address = "0.0.0.0" # INADDR_ANY

2632

2002

self.server_address = (any_address,

2633

2003

self.server_address[1])

2634

2004

elif not self.server_address[1]:

2635

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

2005

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

2006

0)

2636

2007

# if self.interface:

2637

2008

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

2638

2009

# 0, # port

2644

2015

2645

2016

class MandosServer(IPv6_TCPServer):

2646

2017

"""Mandos server.

2647

2018

2648

2019

Attributes:

2649

2020

clients: set of Client objects

2650

2021

gnutls_priority GnuTLS priority string

2651

2022

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

2652

2653

Assumes a GLib.MainLoop event loop.

2023

2024

Assumes a gobject.MainLoop event loop.

2654

2025

"""

2655

2656

2026

def __init__(self, server_address, RequestHandlerClass,

2657

interface=None,

2658

use_ipv6=True,

2659

clients=None,

2660

gnutls_priority=None,

2661

use_dbus=True,

2662

socketfd=None):

2027

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

2028

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

2663

2029

self.enabled = False

2664

2030

self.clients = clients

2665

2031

if self.clients is None:

2668

2034

self.gnutls_priority = gnutls_priority

2669

2035

IPv6_TCPServer.__init__(self, server_address,

2670

2036

RequestHandlerClass,

2671

interface=interface,

2672

use_ipv6=use_ipv6,

2673

socketfd=socketfd)

2674

2037

interface = interface,

2038

use_ipv6 = use_ipv6,

2039

socketfd = socketfd)

2675

2040

def server_activate(self):

2676

2041

if self.enabled:

2677

2042

return socketserver.TCPServer.server_activate(self)

2678

2043

2679

2044

def enable(self):

2680

2045

self.enabled = True

2681

2046

2682

2047

def add_pipe(self, parent_pipe, proc):

2683

2048

# Call "handle_ipc" for both data and EOF events

2684

GLib.io_add_watch(

2685

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

2686

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

2687

functools.partial(self.handle_ipc,

2688

parent_pipe=parent_pipe,

2689

proc=proc))

2690

2691

def handle_ipc(self, source, condition,

2692

parent_pipe=None,

2693

proc=None,

2694

client_object=None):

2049

gobject.io_add_watch(parent_pipe.fileno(),

2050

gobject.IO_IN | gobject.IO_HUP,

2051

functools.partial(self.handle_ipc,

2052

parent_pipe =

2053

parent_pipe,

2054

proc = proc))

2055

2056

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

2057

proc = None, client_object=None):

2695

2058

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

2696

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

2059

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

2697

2060

# Wait for other process to exit

2698

2061

proc.join()

2699

2062

return False

2700

2063

2701

2064

# Read a request from the child

2702

2065

request = parent_pipe.recv()

2703

2066

command = request[0]

2704

2067

2705

2068

if command == 'init':

2706

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

2707

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

2708

address = request[3]

2709

2710

for c in self.clients.values():

2711

if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":

2712

continue

2713

if key_id and c.key_id == key_id:

2714

client = c

2715

break

2716

if fpr and c.fingerprint == fpr:

2069

fpr = request[1]

2070

address = request[2]

2071

2072

for c in self.clients.itervalues():

2073

if c.fingerprint == fpr:

2717

2074

client = c

2718

2075

break

2719

2076

else:

2720

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

2721

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

2077

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

2078

"dress: %s", fpr, address)

2722

2079

if self.use_dbus:

2723

2080

# Emit D-Bus signal

2724

mandos_dbus_service.ClientNotFound(key_id or fpr,

2081

mandos_dbus_service.ClientNotFound(fpr,

2725

2082

address[0])

2726

2083

parent_pipe.send(False)

2727

2084

return False

2728

2729

GLib.io_add_watch(

2730

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

2731

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

2732

functools.partial(self.handle_ipc,

2733

parent_pipe=parent_pipe,

2734

proc=proc,

2735

client_object=client))

2085

2086

gobject.io_add_watch(parent_pipe.fileno(),

2087

gobject.IO_IN | gobject.IO_HUP,

2088

functools.partial(self.handle_ipc,

2089

parent_pipe =

2090

parent_pipe,

2091

proc = proc,

2092

client_object =

2093

client))

2736

2094

parent_pipe.send(True)

2737

2095

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

2738

2096

# same fileno

2741

2099

funcname = request[1]

2742

2100

args = request[2]

2743

2101

kwargs = request[3]

2744

2102

2745

2103

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

2746

2104

funcname)(*args,

2747

**kwargs)))

2748

2105

**kwargs)))

2106

2749

2107

if command == 'getattr':

2750

2108

attrname = request[1]

2751

if isinstance(client_object.__getattribute__(attrname),

2752

collections.Callable):

2753

parent_pipe.send(('function', ))

2109

if callable(client_object.__getattribute__(attrname)):

2110

parent_pipe.send(('function',))

2754

2111

else:

2755

parent_pipe.send((

2756

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

2757

2112

parent_pipe.send(('data', client_object

2113

.__getattribute__(attrname)))

2114

2758

2115

if command == 'setattr':

2759

2116

attrname = request[1]

2760

2117

value = request[2]

2761

2118

setattr(client_object, attrname, value)

2762

2119

2763

2120

return True

2764

2121

2765

2122

2766

2123

def rfc3339_duration_to_delta(duration):

2767

2124

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

2768

2769

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

2770

True

2771

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

2772

True

2773

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

2774

True

2775

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

2776

True

2777

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

2778

True

2779

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

2780

True

2781

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

2782

True

2125

2126

>>> rfc3339_duration_to_delta("P7D")

2127

datetime.timedelta(7)

2128

>>> rfc3339_duration_to_delta("PT60S")

2129

datetime.timedelta(0, 60)

2130

>>> rfc3339_duration_to_delta("PT60M")

2131

datetime.timedelta(0, 3600)

2132

>>> rfc3339_duration_to_delta("PT24H")

2133

datetime.timedelta(1)

2134

>>> rfc3339_duration_to_delta("P1W")

2135

datetime.timedelta(7)

2136

>>> rfc3339_duration_to_delta("PT5M30S")

2137

datetime.timedelta(0, 330)

2138

>>> rfc3339_duration_to_delta("P1DT3M20S")

2139

datetime.timedelta(1, 200)

2783

2140

"""

2784

2141

2785

2142

# Parsing an RFC 3339 duration with regular expressions is not

2786

2143

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

2787

2144

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

2788

2145

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

2789

2146

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

2790

2147

# avoid excessive use of external libraries.

2791

2148

2792

2149

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

2793

Token = collections.namedtuple("Token", (

2794

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

2795

# a "group" containing digits

2796

"value", # datetime.timedelta or None

2797

"followers")) # Tokens valid after this token

2150

Token = collections.namedtuple("Token",

2151

("regexp", # To match token; if

2152

# "value" is not None,

2153

# must have a "group"

2154

# containing digits

2155

"value", # datetime.timedelta or

2156

# None

2157

"followers")) # Tokens valid after

2158

# this token

2798

2159

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

2799

2160

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

2800

2161

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

2801

2162

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

2802

2163

datetime.timedelta(seconds=1),

2803

frozenset((token_end, )))

2164

frozenset((token_end,)))

2804

2165

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

2805

2166

datetime.timedelta(minutes=1),

2806

2167

frozenset((token_second, token_end)))

2822

2183

frozenset((token_month, token_end)))

2823

2184

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

2824

2185

datetime.timedelta(weeks=1),

2825

frozenset((token_end, )))

2186

frozenset((token_end,)))

2826

2187

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

2827

2188

frozenset((token_year, token_month,

2828

2189

token_day, token_time,

2829

token_week)))

2830

# Define starting values:

2831

# Value so far

2832

value = datetime.timedelta()

2190

token_week))),

2191

# Define starting values

2192

value = datetime.timedelta() # Value so far

2833

2193

found_token = None

2834

# Following valid tokens

2835

followers = frozenset((token_duration, ))

2836

# String left to parse

2837

s = duration

2194

followers = frozenset(token_duration,) # Following valid tokens

2195

s = duration # String left to parse

2838

2196

# Loop until end token is found

2839

2197

while found_token is not token_end:

2840

2198

# Search for any currently valid tokens

2856

2214

break

2857

2215

else:

2858

2216

# No currently valid tokens were found

2859

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

2860

.format(duration))

2217

raise ValueError("Invalid RFC 3339 duration")

2861

2218

# End token found

2862

2219

return value

2863

2220

2864

2221

2865

2222

def string_to_delta(interval):

2866

2223

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

2867

2868

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

2869

True

2870

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

2871

True

2872

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

2873

True

2874

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

2875

True

2876

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

2877

True

2878

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

2879

True

2224

2225

>>> string_to_delta('7d')

2226

datetime.timedelta(7)

2227

>>> string_to_delta('60s')

2228

datetime.timedelta(0, 60)

2229

>>> string_to_delta('60m')

2230

datetime.timedelta(0, 3600)

2231

>>> string_to_delta('24h')

2232

datetime.timedelta(1)

2233

>>> string_to_delta('1w')

2234

datetime.timedelta(7)

2235

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

2236

datetime.timedelta(0, 330)

2880

2237

"""

2881

2238

2882

2239

try:

2883

2240

return rfc3339_duration_to_delta(interval)

2884

2241

except ValueError:

2885

2242

pass

2886

2243

2887

2244

timevalue = datetime.timedelta(0)

2888

2245

for s in interval.split():

2889

2246

try:

2890

suffix = s[-1]

2247

suffix = unicode(s[-1])

2891

2248

value = int(s[:-1])

2892

2249

if suffix == "d":

2893

2250

delta = datetime.timedelta(value)

2900

2257

elif suffix == "w":

2901

2258

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

2902

2259

else:

2903

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

2260

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

2261

.format(suffix))

2904

2262

except IndexError as e:

2905

2263

raise ValueError(*(e.args))

2906

2264

timevalue += delta

2907

2265

return timevalue

2908

2266

2909

2267

2910

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

2268

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

2911

2269

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

2912

2270

2913

2271

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

2914

2272

if os.fork():

2915

2273

sys.exit()

2923

2281

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

2924

2282

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

2925

2283

raise OSError(errno.ENODEV,

2926

"{} not a character device"

2284

"{0} not a character device"

2927

2285

.format(os.devnull))

2928

2286

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

2929

2287

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

2933

2291

2934

2292

2935

2293

def main():

2936

2294

2937

2295

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

2938

2296

# Parsing of options, both command line and config file

2939

2297

2940

2298

parser = argparse.ArgumentParser()

2941

2299

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

2942

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

2300

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

2943

2301

help="show version number and exit")

2944

2302

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

2945

2303

help="Bind to interface IF")

2978

2336

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

2979

2337

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

2980

2338

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

2981

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

2982

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

2983

default=None)

2984

2339

2985

2340

options = parser.parse_args()

2986

2341

2342

if options.check:

2343

import doctest

2344

doctest.testmod()

2345

sys.exit()

2346

2987

2347

# Default values for config file for server-global settings

2988

if gnutls.has_rawpk:

2989

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

2990

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

2991

else:

2992

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

2993

":+SIGN-DSA-SHA256")

2994

server_defaults = {"interface": "",

2995

"address": "",

2996

"port": "",

2997

"debug": "False",

2998

"priority": priority,

2999

"servicename": "Mandos",

3000

"use_dbus": "True",

3001

"use_ipv6": "True",

3002

"debuglevel": "",

3003

"restore": "True",

3004

"socket": "",

3005

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

3006

"foreground": "False",

3007

"zeroconf": "True",

3008

}

3009

del priority

3010

2348

server_defaults = { "interface": "",

2349

"address": "",

2350

"port": "",

2351

"debug": "False",

2352

"priority":

2353

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

2354

"servicename": "Mandos",

2355

"use_dbus": "True",

2356

"use_ipv6": "True",

2357

"debuglevel": "",

2358

"restore": "True",

2359

"socket": "",

2360

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

2361

"foreground": "False",

2362

}

2363

3011

2364

# Parse config file for server-global settings

3012

server_config = configparser.ConfigParser(server_defaults)

2365

server_config = configparser.SafeConfigParser(server_defaults)

3013

2366

del server_defaults

3014

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

3015

# Convert the ConfigParser object to a dict

2367

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

2368

"mandos.conf"))

2369

# Convert the SafeConfigParser object to a dict

3016

2370

server_settings = server_config.defaults()

3017

2371

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

3018

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

3019

"foreground", "zeroconf"):

2372

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

3020

2373

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

3021

2374

option)

3022

2375

if server_settings["port"]:

3032

2385

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

3033

2386

["socket"])

3034

2387

del server_config

3035

2388

3036

2389

# Override the settings from the config file with command line

3037

2390

# options, if set.

3038

2391

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

3039

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

3040

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

3041

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

2392

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

2393

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

2394

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

3042

2395

value = getattr(options, option)

3043

2396

if value is not None:

3044

2397

server_settings[option] = value

3045

2398

del options

3046

2399

# Force all strings to be unicode

3047

2400

for option in server_settings.keys():

3048

if isinstance(server_settings[option], bytes):

3049

server_settings[option] = (server_settings[option]

3050

.decode("utf-8"))

2401

if type(server_settings[option]) is str:

2402

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

3051

2403

# Force all boolean options to be boolean

3052

2404

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

3053

"foreground", "zeroconf"):

2405

"foreground"):

3054

2406

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

3055

2407

# Debug implies foreground

3056

2408

if server_settings["debug"]:

3057

2409

server_settings["foreground"] = True

3058

2410

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

3059

2411

3060

2412

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

3061

3062

if (not server_settings["zeroconf"]

3063

and not (server_settings["port"]

3064

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

3065

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

3066

2413

3067

2414

# For convenience

3068

2415

debug = server_settings["debug"]

3069

2416

debuglevel = server_settings["debuglevel"]

3072

2419

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

3073

2420

stored_state_file)

3074

2421

foreground = server_settings["foreground"]

3075

zeroconf = server_settings["zeroconf"]

3076

2422

3077

2423

if debug:

3078

2424

initlogger(debug, logging.DEBUG)

3079

2425

else:

3082

2428

else:

3083

2429

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

3084

2430

initlogger(debug, level)

3085

2431

3086

2432

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

3087

syslogger.setFormatter(

3088

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

3089

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

3090

server_settings["servicename"])))

3091

2433

syslogger.setFormatter(logging.Formatter

2434

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

2435

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

2436

.format(server_settings

2437

["servicename"])))

2438

3092

2439

# Parse config file with clients

3093

client_config = configparser.ConfigParser(Client.client_defaults)

2440

client_config = configparser.SafeConfigParser(Client

2441

.client_defaults)

3094

2442

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

3095

2443

"clients.conf"))

3096

2444

3097

2445

global mandos_dbus_service

3098

2446

mandos_dbus_service = None

3099

3100

socketfd = None

3101

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

3102

socketfd = server_settings["socket"]

3103

tcp_server = MandosServer(

3104

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

3105

ClientHandler,

3106

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

3107

use_ipv6=use_ipv6,

3108

gnutls_priority=server_settings["priority"],

3109

use_dbus=use_dbus,

3110

socketfd=socketfd)

2447

2448

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

2449

server_settings["port"]),

2450

ClientHandler,

2451

interface=(server_settings["interface"]

2452

or None),

2453

use_ipv6=use_ipv6,

2454

gnutls_priority=

2455

server_settings["priority"],

2456

use_dbus=use_dbus,

2457

socketfd=(server_settings["socket"]

2458

or None))

3111

2459

if not foreground:

3112

2460

pidfilename = "/run/mandos.pid"

3113

2461

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

3114

2462

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

3115

2463

pidfile = None

3116

2464

try:

3117

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

2465

pidfile = open(pidfilename, "w")

3118

2466

except IOError as e:

3119

2467

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

3120

2468

exc_info=e)

3121

3122

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

3123

("mandos", "mandos"),

3124

("nobody", "nogroup")):

2469

2470

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

3125

2471

try:

3126

2472

uid = pwd.getpwnam(name).pw_uid

3127

gid = pwd.getpwnam(group).pw_gid

2473

gid = pwd.getpwnam(name).pw_gid

3128

2474

break

3129

2475

except KeyError:

3130

2476

continue

3134

2480

try:

3135

2481

os.setgid(gid)

3136

2482

os.setuid(uid)

3137

if debug:

3138

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

3139

gid))

3140

2483

except OSError as error:

3141

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

3142

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

3143

2484

if error.errno != errno.EPERM:

3144

2485

raise

3145

2486

3146

2487

if debug:

3147

2488

# Enable all possible GnuTLS debugging

3148

2489

3149

2490

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

3150

2491

# - GnuTLS manual

3151

gnutls.global_set_log_level(11)

3152

3153

@gnutls.log_func

2492

gnutls.library.functions.gnutls_global_set_log_level(11)

2493

2494

@gnutls.library.types.gnutls_log_func

3154

2495

def debug_gnutls(level, string):

3155

2496

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

3156

3157

gnutls.global_set_log_function(debug_gnutls)

3158

2497

2498

(gnutls.library.functions

2499

.gnutls_global_set_log_function(debug_gnutls))

2500

3159

2501

# Redirect stdin so all checkers get /dev/null

3160

2502

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

3161

2503

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

3162

2504

if null > 2:

3163

2505

os.close(null)

3164

2506

3165

2507

# Need to fork before connecting to D-Bus

3166

2508

if not foreground:

3167

2509

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

3168

2510

daemon()

3169

3170

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

3171

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

3172

# need to inform GLib that threads will be used.

3173

GLib.threads_init()

3174

2511

2512

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

2513

# need to inform gobject that threads will be used.

2514

gobject.threads_init()

2515

3175

2516

global main_loop

3176

2517

# From the Avahi example code

3177

2518

DBusGMainLoop(set_as_default=True)

3178

main_loop = GLib.MainLoop()

2519

main_loop = gobject.MainLoop()

3179

2520

bus = dbus.SystemBus()

3180

2521

# End of Avahi example code

3181

2522

if use_dbus:

3182

2523

try:

3183

2524

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

3184

bus,

3185

do_not_queue=True)

3186

old_bus_name = dbus.service.BusName(

3187

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

3188

do_not_queue=True)

3189

except dbus.exceptions.DBusException as e:

2525

bus, do_not_queue=True)

2526

old_bus_name = (dbus.service.BusName

2527

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

2528

do_not_queue=True))

2529

except dbus.exceptions.NameExistsException as e:

3190

2530

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

3191

2531

use_dbus = False

3192

2532

server_settings["use_dbus"] = False

3193

2533

tcp_server.use_dbus = False

3194

if zeroconf:

3195

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

3196

service = AvahiServiceToSyslog(

3197

name=server_settings["servicename"],

3198

servicetype="_mandos._tcp",

3199

protocol=protocol,

3200

bus=bus)

3201

if server_settings["interface"]:

3202

service.interface = if_nametoindex(

3203

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

3204

2534

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2535

service = AvahiServiceToSyslog(name =

2536

server_settings["servicename"],

2537

servicetype = "_mandos._tcp",

2538

protocol = protocol, bus = bus)

2539

if server_settings["interface"]:

2540

service.interface = (if_nametoindex

2541

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

2542

3205

2543

global multiprocessing_manager

3206

2544

multiprocessing_manager = multiprocessing.Manager()

3207

2545

3208

2546

client_class = Client

3209

2547

if use_dbus:

3210

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

3211

2548

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

2549

3212

2550

client_settings = Client.config_parser(client_config)

3213

2551

old_client_settings = {}

3214

2552

clients_data = {}

3215

2553

3216

2554

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

3217

2555

global wnull

3218

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

2556

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

3219

2557

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

3220

2558

# mode

3221

2559

if debug or not foreground:

3222

2560

wnull.close()

3223

2561

3224

2562

# Get client data and settings from last running state.

3225

2563

if server_settings["restore"]:

3226

2564

try:

3227

2565

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

3228

if sys.version_info.major == 2:

3229

clients_data, old_client_settings = pickle.load(

3230

stored_state)

3231

else:

3232

bytes_clients_data, bytes_old_client_settings = (

3233

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

3234

# Fix bytes to strings

3235

# clients_data

3236

# .keys()

3237

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

3238

if isinstance(key, bytes)

3239

else key): value

3240

for key, value in

3241

bytes_clients_data.items()}

3242

del bytes_clients_data

3243

for key in clients_data:

3244

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

3245

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

3246

for k, v in

3247

clients_data[key].items()}

3248

clients_data[key] = value

3249

# .client_structure

3250

value["client_structure"] = [

3251

(s.decode("utf-8")

3252

if isinstance(s, bytes)

3253

else s) for s in

3254

value["client_structure"]]

3255

# .name, .host, and .checker_command

3256

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

3257

if isinstance(value[k], bytes):

3258

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

3259

if "key_id" not in value:

3260

value["key_id"] = ""

3261

elif "fingerprint" not in value:

3262

value["fingerprint"] = ""

3263

# old_client_settings

3264

# .keys()

3265

old_client_settings = {

3266

(key.decode("utf-8")

3267

if isinstance(key, bytes)

3268

else key): value

3269

for key, value in

3270

bytes_old_client_settings.items()}

3271

del bytes_old_client_settings

3272

# .host and .checker_command

3273

for value in old_client_settings.values():

3274

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

3275

if isinstance(value[attribute], bytes):

3276

value[attribute] = (value[attribute]

3277

.decode("utf-8"))

2566

clients_data, old_client_settings = (pickle.load

2567

(stored_state))

3278

2568

os.remove(stored_state_path)

3279

2569

except IOError as e:

3280

2570

if e.errno == errno.ENOENT:

3281

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

3282

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

2571

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

2572

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

3283

2573

else:

3284

2574

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

3285

2575

exc_info=e)

3286

2576

raise

3287

2577

except EOFError as e:

3288

2578

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

3289

"EOFError:",

3290

exc_info=e)

3291

2579

"EOFError:", exc_info=e)

2580

3292

2581

with PGPEngine() as pgp:

3293

for client_name, client in clients_data.items():

2582

for client_name, client in clients_data.iteritems():

3294

2583

# Skip removed clients

3295

2584

if client_name not in client_settings:

3296

2585

continue

3297

2586

3298

2587

# Decide which value to use after restoring saved state.

3299

2588

# We have three different values: Old config file,

3300

2589

# new config file, and saved state.

3305

2594

# For each value in new config, check if it

3306

2595

# differs from the old config value (Except for

3307

2596

# the "secret" attribute)

3308

if (name != "secret"

3309

and (value !=

3310

old_client_settings[client_name][name])):

2597

if (name != "secret" and

2598

value != old_client_settings[client_name]

2599

[name]):

3311

2600

client[name] = value

3312

2601

except KeyError:

3313

2602

pass

3314

2603

3315

2604

# Clients who has passed its expire date can still be

3316

# enabled if its last checker was successful. A Client

2605

# enabled if its last checker was successful. Clients

3317

2606

# whose checker succeeded before we stored its state is

3318

2607

# assumed to have successfully run all checkers during

3319

2608

# downtime.

3321

2610

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

3322

2611

if not client["last_checked_ok"]:

3323

2612

logger.warning(

3324

"disabling client {} - Client never "

3325

"performed a successful checker".format(

3326

client_name))

2613

"disabling client {0} - Client never "

2614

"performed a successful checker"

2615

.format(client_name))

3327

2616

client["enabled"] = False

3328

2617

elif client["last_checker_status"] != 0:

3329

2618

logger.warning(

3330

"disabling client {} - Client last"

3331

" checker failed with error code"

3332

" {}".format(

3333

client_name,

3334

client["last_checker_status"]))

2619

"disabling client {0} - Client "

2620

"last checker failed with error code {1}"

2621

.format(client_name,

2622

client["last_checker_status"]))

3335

2623

client["enabled"] = False

3336

2624

else:

3337

client["expires"] = (

3338

datetime.datetime.utcnow()

3339

+ client["timeout"])

2625

client["expires"] = (datetime.datetime

2626

.utcnow()

2627

+ client["timeout"])

3340

2628

logger.debug("Last checker succeeded,"

3341

" keeping {} enabled".format(

3342

client_name))

2629

" keeping {0} enabled"

2630

.format(client_name))

3343

2631

try:

3344

client["secret"] = pgp.decrypt(

3345

client["encrypted_secret"],

3346

client_settings[client_name]["secret"])

2632

client["secret"] = (

2633

pgp.decrypt(client["encrypted_secret"],

2634

client_settings[client_name]

2635

["secret"]))

3347

2636

except PGPError:

3348

2637

# If decryption fails, we use secret from new settings

3349

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

3350

client_name))

3351

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

3352

["secret"])

3353

2638

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

2639

.format(client_name))

2640

client["secret"] = (

2641

client_settings[client_name]["secret"])

2642

3354

2643

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

3355

2644

for client_name in (set(old_client_settings)

3356

2645

- set(client_settings)):

3358

2647

for client_name in (set(client_settings)

3359

2648

- set(old_client_settings)):

3360

2649

clients_data[client_name] = client_settings[client_name]

3361

2650

3362

2651

# Create all client objects

3363

for client_name, client in clients_data.items():

2652

for client_name, client in clients_data.iteritems():

3364

2653

tcp_server.clients[client_name] = client_class(

3365

name=client_name,

3366

settings=client,

3367

server_settings=server_settings)

3368

2654

name = client_name, settings = client,

2655

server_settings = server_settings)

2656

3369

2657

if not tcp_server.clients:

3370

2658

logger.warning("No clients defined")

3371

2659

3372

2660

if not foreground:

3373

2661

if pidfile is not None:

3374

pid = os.getpid()

3375

2662

try:

3376

2663

with pidfile:

3377

print(pid, file=pidfile)

2664

pid = os.getpid()

2665

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

3378

2666

except IOError:

3379

2667

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

3380

2668

pidfilename, pid)

3381

2669

del pidfile

3382

2670

del pidfilename

3383

3384

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

3385

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3386

lambda: main_loop.quit() and False)

3387

2671

2672

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

2673

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

2674

3388

2675

if use_dbus:

3389

3390

@alternate_dbus_interfaces(

3391

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

3392

class MandosDBusService(DBusObjectWithObjectManager):

2676

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

2677

"se.bsnet.fukt.Mandos"})

2678

class MandosDBusService(DBusObjectWithProperties):

3393

2679

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

3394

3395

2680

def __init__(self):

3396

2681

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

3397

3398

2682

_interface = "se.recompile.Mandos"

3399

2683

2684

@dbus_interface_annotations(_interface)

2685

def _foo(self):

2686

return { "org.freedesktop.DBus.Property"

2687

".EmitsChangedSignal":

2688

"false"}

2689

3400

2690

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

3401

2691

def ClientAdded(self, objpath):

3402

2692

"D-Bus signal"

3403

2693

pass

3404

2694

3405

2695

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

3406

def ClientNotFound(self, key_id, address):

2696

def ClientNotFound(self, fingerprint, address):

3407

2697

"D-Bus signal"

3408

2698

pass

3409

3410

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

3411

"true"})

2699

3412

2700

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

3413

2701

def ClientRemoved(self, objpath, name):

3414

2702

"D-Bus signal"

3415

2703

pass

3416

3417

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

3418

"true"})

2704

3419

2705

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

3420

2706

def GetAllClients(self):

3421

2707

"D-Bus method"

3422

return dbus.Array(c.dbus_object_path for c in

3423

tcp_server.clients.values())

3424

3425

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

3426

"true"})

2708

return dbus.Array(c.dbus_object_path

2709

for c in

2710

tcp_server.clients.itervalues())

2711

3427

2712

@dbus.service.method(_interface,

3428

2713

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

3429

2714

def GetAllClientsWithProperties(self):

3430

2715

"D-Bus method"

3431

2716

return dbus.Dictionary(

3432

{c.dbus_object_path: c.GetAll(

3433

"se.recompile.Mandos.Client")

3434

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

2717

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

2718

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

3435

2719

signature="oa{sv}")

3436

2720

3437

2721

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

3438

2722

def RemoveClient(self, object_path):

3439

2723

"D-Bus method"

3440

for c in tcp_server.clients.values():

2724

for c in tcp_server.clients.itervalues():

3441

2725

if c.dbus_object_path == object_path:

3442

2726

del tcp_server.clients[c.name]

3443

2727

c.remove_from_connection()

3444

# Don't signal the disabling

2728

# Don't signal anything except ClientRemoved

3445

2729

c.disable(quiet=True)

3446

# Emit D-Bus signal for removal

3447

self.client_removed_signal(c)

2730

# Emit D-Bus signal

2731

self.ClientRemoved(object_path, c.name)

3448

2732

return

3449

2733

raise KeyError(object_path)

3450

2734

3451

2735

del _interface

3452

3453

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3454

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

3455

def GetManagedObjects(self):

3456

"""D-Bus method"""

3457

return dbus.Dictionary(

3458

{client.dbus_object_path:

3459

dbus.Dictionary(

3460

{interface: client.GetAll(interface)

3461

for interface in

3462

client._get_all_interface_names()})

3463

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

3464

3465

def client_added_signal(self, client):

3466

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

3467

if use_dbus:

3468

# New standard signal

3469

self.InterfacesAdded(

3470

client.dbus_object_path,

3471

dbus.Dictionary(

3472

{interface: client.GetAll(interface)

3473

for interface in

3474

client._get_all_interface_names()}))

3475

# Old signal

3476

self.ClientAdded(client.dbus_object_path)

3477

3478

def client_removed_signal(self, client):

3479

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

3480

if use_dbus:

3481

# New standard signal

3482

self.InterfacesRemoved(

3483

client.dbus_object_path,

3484

client._get_all_interface_names())

3485

# Old signal

3486

self.ClientRemoved(client.dbus_object_path,

3487

client.name)

3488

2736

3489

2737

mandos_dbus_service = MandosDBusService()

3490

3491

# Save modules to variables to exempt the modules from being

3492

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

3493

mp = multiprocessing

3494

wn = wnull

3495

2738

3496

2739

def cleanup():

3497

2740

"Cleanup function; run on exit"

3498

if zeroconf:

3499

service.cleanup()

3500

3501

mp.active_children()

3502

wn.close()

2741

service.cleanup()

2742

2743

multiprocessing.active_children()

2744

wnull.close()

3503

2745

if not (tcp_server.clients or client_settings):

3504

2746

return

3505

2747

3506

2748

# Store client before exiting. Secrets are encrypted with key

3507

2749

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

3508

2750

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

3509

2751

clients = {}

3510

2752

with PGPEngine() as pgp:

3511

for client in tcp_server.clients.values():

2753

for client in tcp_server.clients.itervalues():

3512

2754

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

3513

2755

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

3514

2756

key)

3515

2757

client_dict = {}

3516

2758

3517

2759

# A list of attributes that can not be pickled

3518

2760

# + secret.

3519

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

3520

"checker", "server_settings"}

3521

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

3522

.Object):

2761

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

2762

"checker", "server_settings"))

2763

for name, typ in (inspect.getmembers

2764

(dbus.service.Object)):

3523

2765

exclude.add(name)

3524

2766

3525

2767

client_dict["encrypted_secret"] = (client

3526

2768

.encrypted_secret)

3527

2769

for attr in client.client_structure:

3528

2770

if attr not in exclude:

3529

2771

client_dict[attr] = getattr(client, attr)

3530

2772

3531

2773

clients[client.name] = client_dict

3532

2774

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

3533

2775

3534

2776

try:

3535

with tempfile.NamedTemporaryFile(

3536

mode='wb',

3537

suffix=".pickle",

3538

prefix='clients-',

3539

dir=os.path.dirname(stored_state_path),

3540

delete=False) as stored_state:

3541

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

3542

protocol=2)

3543

tempname = stored_state.name

2777

with (tempfile.NamedTemporaryFile

2778

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

2779

dir=os.path.dirname(stored_state_path),

2780

delete=False)) as stored_state:

2781

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

2782

tempname=stored_state.name

3544

2783

os.rename(tempname, stored_state_path)

3545

2784

except (IOError, OSError) as e:

3546

2785

if not debug:

3549

2788

except NameError:

3550

2789

pass

3551

2790

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

3552

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

2791

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

3553

2792

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

3554

2793

else:

3555

2794

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

3556

2795

exc_info=e)

3557

2796

raise

3558

2797

3559

2798

# Delete all clients, and settings from config

3560

2799

while tcp_server.clients:

3561

2800

name, client = tcp_server.clients.popitem()

3562

2801

if use_dbus:

3563

2802

client.remove_from_connection()

3564

# Don't signal the disabling

2803

# Don't signal anything except ClientRemoved

3565

2804

client.disable(quiet=True)

3566

# Emit D-Bus signal for removal

3567

2805

if use_dbus:

3568

mandos_dbus_service.client_removed_signal(client)

2806

# Emit D-Bus signal

2807

mandos_dbus_service.ClientRemoved(client

2808

.dbus_object_path,

2809

client.name)

3569

2810

client_settings.clear()

3570

2811

3571

2812

atexit.register(cleanup)

3572

3573

for client in tcp_server.clients.values():

2813

2814

for client in tcp_server.clients.itervalues():

3574

2815

if use_dbus:

3575

# Emit D-Bus signal for adding

3576

mandos_dbus_service.client_added_signal(client)

2816

# Emit D-Bus signal

2817

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3577

2818

# Need to initiate checking of clients

3578

2819

if client.enabled:

3579

2820

client.init_checker()

3580

2821

3581

2822

tcp_server.enable()

3582

2823

tcp_server.server_activate()

3583

2824

3584

2825

# Find out what port we got

3585

if zeroconf:

3586

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

2826

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

3587

2827

if use_ipv6:

3588

2828

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

3589

2829

" flowinfo %d, scope_id %d",

3591

2831

else: # IPv4

3592

2832

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

3593

2833

*tcp_server.socket.getsockname())

3594

3595

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

3596

2834

2835

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

2836

3597

2837

try:

3598

if zeroconf:

3599

# From the Avahi example code

3600

try:

3601

service.activate()

3602

except dbus.exceptions.DBusException as error:

3603

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

3604

cleanup()

3605

sys.exit(1)

3606

# End of Avahi example code

3607

3608

GLib.io_add_watch(

3609

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

3610

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

3611

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

3612

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

3613

2838

# From the Avahi example code

2839

try:

2840

service.activate()

2841

except dbus.exceptions.DBusException as error:

2842

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

2843

cleanup()

2844

sys.exit(1)

2845

# End of Avahi example code

2846

2847

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

2848

lambda *args, **kwargs:

2849

(tcp_server.handle_request

2850

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

2851

3614

2852

logger.debug("Starting main loop")

3615

2853

main_loop.run()

3616

2854

except AvahiError as error:

3625

2863

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

3626

2864

cleanup()

3627

2865

3628

3629

def should_only_run_tests():

3630

parser = argparse.ArgumentParser(add_help=False)

3631

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

3632

args, unknown_args = parser.parse_known_args()

3633

run_tests = args.check

3634

if run_tests:

3635

# Remove --check argument from sys.argv

3636

sys.argv[1:] = unknown_args

3637

return run_tests

3638

3639

# Add all tests from doctest strings

3640

def load_tests(loader, tests, none):

3641

import doctest

3642

tests.addTests(doctest.DocTestSuite())

3643

return tests

3644

3645

2866

if __name__ == '__main__':

3646

try:

3647

if should_only_run_tests():

3648

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

3649

unittest.main()

3650

else:

3651

main()

3652

finally:

3653

logging.shutdown()

2867

main()