/mandos/trunk : revision 237.4.23

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

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#

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# Everything else is

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#

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

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

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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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try:

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import SocketServer as socketserver

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except ImportError:

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import socketserver

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import SocketServer as socketserver

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import socket

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import argparse

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import datetime

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import errno

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try:

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import ConfigParser as configparser

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except ImportError:

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import configparser

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import gnutls.crypto

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import gnutls.connection

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import gnutls.errors

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import gnutls.library.functions

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import gnutls.library.constants

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import gnutls.library.types

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import ConfigParser as configparser

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import sys

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import re

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import os

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import struct

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import fcntl

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import functools

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try:

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import cPickle as pickle

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except ImportError:

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import pickle

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import cPickle as pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import collections

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import codecs

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import dbus

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import dbus.service

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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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import GnuPGInterface

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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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version = "1.7.8"

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SO_BINDTODEVICE = None

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version = "1.5.0"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = None

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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try:

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if_nametoindex = ctypes.cdll.LoadLibrary(

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

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.if_nametoindex)

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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

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

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interface))

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

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ifreq[16:20])[0]

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return interface_index

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def copy_function(func):

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

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if sys.version_info.major == 2:

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return types.FunctionType(func.func_code,

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func.func_globals,

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func.func_name,

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func.func_defaults,

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func.func_closure)

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else:

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return types.FunctionType(func.__code__,

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func.__globals__,

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func.__name__,

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func.__defaults__,

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func.__closure__)

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

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"""init logger and add loglevel"""

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global syslogger

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syslogger = (logging.handlers.SysLogHandler(

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facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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address = "/dev/log"))

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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class PGPEngine(object):

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

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def __init__(self):

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self.gnupg = GnuPGInterface.GnuPG()

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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 == "gpg":

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self.gpg = path

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break

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except OSError as e:

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if e.errno != errno.ENOENT:

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raise

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self.gnupgargs = ['--batch',

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'--homedir', self.tempdir,

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'--force-mdc',

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'--quiet']

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

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

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

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self.gnupg = GnuPGInterface.GnuPG()

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self.gnupg.options.meta_interactive = False

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self.gnupg.options.homedir = self.tempdir

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self.gnupg.options.extra_args.extend(['--force-mdc',

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'--quiet',

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'--no-use-agent'])

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def __enter__(self):

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return self

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

151

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

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self._cleanup()

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return False

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228

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def password_encode(self, password):

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

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

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

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if len(encoded) > 2048:

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

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

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

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

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return encoded

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

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def encrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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

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with open(os.devnull) as devnull:

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try:

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

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

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attach_fhs={'stderr': devnull})

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

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f.write(data)

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

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ciphertext = f.read()

187

proc.wait()

188

except IOError as e:

189

raise PGPError(e)

190

self.gnupg.passphrase = None

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191

return ciphertext

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192

257

193

def decrypt(self, data, password):

258

passphrase = self.password_encode(password)

259

with tempfile.NamedTemporaryFile(

260

dir = self.tempdir) as passfile:

261

passfile.write(passphrase)

262

passfile.flush()

263

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

264

'--passphrase-file',

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passfile.name]

266

+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

270

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

271

if proc.returncode != 0:

272

raise PGPError(err)

194

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

195

with open(os.devnull) as devnull:

196

try:

197

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

198

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

199

attach_fhs={'stderr': devnull})

200

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

201

f.write(data)

202

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

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decrypted_plaintext = f.read()

204

proc.wait()

205

except IOError as e:

206

raise PGPError(e)

207

self.gnupg.passphrase = None

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return decrypted_plaintext

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# Pretend that we have an Avahi module

276

class Avahi(object):

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

278

It is instantiated once, and simulates having an Avahi module."""

279

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

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

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PROTO_INET = 0 # avahi-common/address.h

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PROTO_INET6 = 1 # avahi-common/address.h

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DBUS_NAME = "org.freedesktop.Avahi"

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DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"

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DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

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DBUS_PATH_SERVER = "/"

287

def string_array_to_txt_array(self, t):

288

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

289

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

290

ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h

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ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h

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ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h

293

SERVER_INVALID = 0 # avahi-common/defs.h

294

SERVER_REGISTERING = 1 # avahi-common/defs.h

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SERVER_RUNNING = 2 # avahi-common/defs.h

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SERVER_COLLISION = 3 # avahi-common/defs.h

297

SERVER_FAILURE = 4 # avahi-common/defs.h

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avahi = Avahi()

210

299

211

300

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class AvahiError(Exception):

301

213

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

302

214

self.value = value

303

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

304

**kwargs)

305

215

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

216

def __unicode__(self):

217

return unicode(repr(self.value))

306

218

307

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class AvahiServiceError(AvahiError):

308

220

pass

309

221

310

311

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class AvahiGroupError(AvahiError):

312

223

pass

313

224

320

231

Used to optionally bind to the specified interface.

321

232

name: string; Example: 'Mandos'

322

233

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

323

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

234

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

324

235

port: integer; what port to announce

325

236

TXT: list of strings; TXT record for the service

326

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

332

243

server: D-Bus Server

333

244

bus: dbus.SystemBus()

334

245

"""

335

336

def __init__(self,

337

interface = avahi.IF_UNSPEC,

338

name = None,

339

servicetype = None,

340

port = None,

341

TXT = None,

342

domain = "",

343

host = "",

344

max_renames = 32768,

345

protocol = avahi.PROTO_UNSPEC,

346

bus = None):

246

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

247

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

248

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

249

protocol = avahi.PROTO_UNSPEC, bus = None):

347

250

self.interface = interface

348

251

self.name = name

349

252

self.type = servicetype

358

261

self.server = None

359

262

self.bus = bus

360

263

self.entry_group_state_changed_match = None

361

362

def rename(self, remove=True):

264

def rename(self):

363

265

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

364

266

if self.rename_count >= self.max_renames:

365

267

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

366

268

" after %i retries, exiting.",

367

269

self.rename_count)

368

270

raise AvahiServiceError("Too many renames")

369

self.name = str(

370

self.server.GetAlternativeServiceName(self.name))

371

self.rename_count += 1

271

self.name = unicode(self.server

272

.GetAlternativeServiceName(self.name))

372

273

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

373

274

self.name)

374

if remove:

375

self.remove()

275

self.remove()

376

276

try:

377

277

self.add()

378

278

except dbus.exceptions.DBusException as error:

379

if (error.get_dbus_name()

380

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

381

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

382

return self.rename(remove=False)

383

else:

384

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

385

self.cleanup()

386

os._exit(1)

387

279

logger.critical("DBusException: %s", error)

280

self.cleanup()

281

os._exit(1)

282

self.rename_count += 1

388

283

def remove(self):

389

284

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

390

285

if self.entry_group_state_changed_match is not None:

392

287

self.entry_group_state_changed_match = None

393

288

if self.group is not None:

394

289

self.group.Reset()

395

396

290

def add(self):

397

291

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

398

292

self.remove()

415

309

dbus.UInt16(self.port),

416

310

avahi.string_array_to_txt_array(self.TXT))

417

311

self.group.Commit()

418

419

312

def entry_group_state_changed(self, state, error):

420

313

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

421

314

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

427

320

self.rename()

428

321

elif state == avahi.ENTRY_GROUP_FAILURE:

429

322

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

430

str(error))

431

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

432

323

unicode(error))

324

raise AvahiGroupError("State changed: %s"

325

% unicode(error))

433

326

def cleanup(self):

434

327

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

435

328

if self.group is not None:

440

333

pass

441

334

self.group = None

442

335

self.remove()

443

444

336

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

445

337

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

446

338

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

447

bad_states = {

448

avahi.SERVER_INVALID: "Zeroconf server invalid",

449

avahi.SERVER_REGISTERING: None,

450

avahi.SERVER_COLLISION: "Zeroconf server name collision",

451

avahi.SERVER_FAILURE: "Zeroconf server failure",

452

}

339

bad_states = { avahi.SERVER_INVALID:

340

"Zeroconf server invalid",

341

avahi.SERVER_REGISTERING: None,

342

avahi.SERVER_COLLISION:

343

"Zeroconf server name collision",

344

avahi.SERVER_FAILURE:

345

"Zeroconf server failure" }

453

346

if state in bad_states:

454

347

if bad_states[state] is not None:

455

348

if error is None:

458

351

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

459

352

self.cleanup()

460

353

elif state == avahi.SERVER_RUNNING:

461

try:

462

self.add()

463

except dbus.exceptions.DBusException as error:

464

if (error.get_dbus_name()

465

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

466

logger.info("Local Zeroconf service name"

467

" collision.")

468

return self.rename(remove=False)

469

else:

470

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

471

self.cleanup()

472

os._exit(1)

354

self.add()

473

355

else:

474

356

if error is None:

475

357

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

476

358

else:

477

359

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

478

479

360

def activate(self):

480

361

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

481

362

if self.server is None:

485

366

follow_name_owner_changes=True),

486

367

avahi.DBUS_INTERFACE_SERVER)

487

368

self.server.connect_to_signal("StateChanged",

488

self.server_state_changed)

369

self.server_state_changed)

489

370

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

490

371

491

492

372

class AvahiServiceToSyslog(AvahiService):

493

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

373

def rename(self):

494

374

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

495

ret = AvahiService.rename(self, *args, **kwargs)

496

syslogger.setFormatter(logging.Formatter(

497

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

498

.format(self.name)))

375

ret = AvahiService.rename(self)

376

syslogger.setFormatter(logging.Formatter

377

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

378

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

379

% self.name))

499

380

return ret

500

381

501

# Pretend that we have a GnuTLS module

502

class GnuTLS(object):

503

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

504

It is instantiated once, and simulates having a GnuTLS module."""

505

506

_library = ctypes.cdll.LoadLibrary(

507

ctypes.util.find_library("gnutls"))

508

_need_version = b"3.3.0"

509

def __init__(self):

510

# Need to use class name "GnuTLS" here, since this method is

511

# called before the assignment to the "gnutls" global variable

512

# happens.

513

if GnuTLS.check_version(self._need_version) is None:

514

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

515

.format(self._need_version))

516

517

# Unless otherwise indicated, the constants and types below are

518

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

519

520

# Constants

521

E_SUCCESS = 0

522

E_INTERRUPTED = -52

523

E_AGAIN = -28

524

CRT_OPENPGP = 2

525

CLIENT = 2

526

SHUT_RDWR = 0

527

CRD_CERTIFICATE = 1

528

E_NO_CERTIFICATE_FOUND = -49

529

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

530

531

# Types

532

class session_int(ctypes.Structure):

533

_fields_ = []

534

session_t = ctypes.POINTER(session_int)

535

class certificate_credentials_st(ctypes.Structure):

536

_fields_ = []

537

certificate_credentials_t = ctypes.POINTER(

538

certificate_credentials_st)

539

certificate_type_t = ctypes.c_int

540

class datum_t(ctypes.Structure):

541

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

542

('size', ctypes.c_uint)]

543

class openpgp_crt_int(ctypes.Structure):

544

_fields_ = []

545

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

546

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

547

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

548

credentials_type_t = ctypes.c_int

549

transport_ptr_t = ctypes.c_void_p

550

close_request_t = ctypes.c_int

551

552

# Exceptions

553

class Error(Exception):

554

# We need to use the class name "GnuTLS" here, since this

555

# exception might be raised from within GnuTLS.__init__,

556

# which is called before the assignment to the "gnutls"

557

# global variable has happened.

558

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

559

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

560

# code is passed, convert it to a string with

561

# gnutls.strerror()

562

self.code = code

563

if message is None and code is not None:

564

message = GnuTLS.strerror(code)

565

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

566

message, *args)

567

568

class CertificateSecurityError(Error):

569

pass

570

571

# Classes

572

class Credentials(object):

573

def __init__(self):

574

self._c_object = gnutls.certificate_credentials_t()

575

gnutls.certificate_allocate_credentials(

576

ctypes.byref(self._c_object))

577

self.type = gnutls.CRD_CERTIFICATE

578

579

def __del__(self):

580

gnutls.certificate_free_credentials(self._c_object)

581

582

class ClientSession(object):

583

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

584

self._c_object = gnutls.session_t()

585

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

586

gnutls.set_default_priority(self._c_object)

587

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

588

gnutls.handshake_set_private_extensions(self._c_object,

589

True)

590

self.socket = socket

591

if credentials is None:

592

credentials = gnutls.Credentials()

593

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

594

ctypes.cast(credentials._c_object,

595

ctypes.c_void_p))

596

self.credentials = credentials

597

598

def __del__(self):

599

gnutls.deinit(self._c_object)

600

601

def handshake(self):

602

return gnutls.handshake(self._c_object)

603

604

def send(self, data):

605

data = bytes(data)

606

data_len = len(data)

607

while data_len > 0:

608

data_len -= gnutls.record_send(self._c_object,

609

data[-data_len:],

610

data_len)

611

612

def bye(self):

613

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

614

615

# Error handling functions

616

def _error_code(result):

617

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

618

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

619

if result >= 0:

620

return result

621

if result == gnutls.E_NO_CERTIFICATE_FOUND:

622

raise gnutls.CertificateSecurityError(code = result)

623

raise gnutls.Error(code = result)

624

625

def _retry_on_error(result, func, arguments):

626

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

627

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

628

while result < 0:

629

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

630

return _error_code(result)

631

result = func(*arguments)

632

return result

633

634

# Unless otherwise indicated, the function declarations below are

635

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

636

637

# Functions

638

priority_set_direct = _library.gnutls_priority_set_direct

639

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

640

ctypes.POINTER(ctypes.c_char_p)]

641

priority_set_direct.restype = _error_code

642

643

init = _library.gnutls_init

644

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

645

init.restype = _error_code

646

647

set_default_priority = _library.gnutls_set_default_priority

648

set_default_priority.argtypes = [session_t]

649

set_default_priority.restype = _error_code

650

651

record_send = _library.gnutls_record_send

652

record_send.argtypes = [session_t, ctypes.c_void_p,

653

ctypes.c_size_t]

654

record_send.restype = ctypes.c_ssize_t

655

record_send.errcheck = _retry_on_error

656

657

certificate_allocate_credentials = (

658

_library.gnutls_certificate_allocate_credentials)

659

certificate_allocate_credentials.argtypes = [

660

ctypes.POINTER(certificate_credentials_t)]

661

certificate_allocate_credentials.restype = _error_code

662

663

certificate_free_credentials = (

664

_library.gnutls_certificate_free_credentials)

665

certificate_free_credentials.argtypes = [certificate_credentials_t]

666

certificate_free_credentials.restype = None

667

668

handshake_set_private_extensions = (

669

_library.gnutls_handshake_set_private_extensions)

670

handshake_set_private_extensions.argtypes = [session_t,

671

ctypes.c_int]

672

handshake_set_private_extensions.restype = None

673

674

credentials_set = _library.gnutls_credentials_set

675

credentials_set.argtypes = [session_t, credentials_type_t,

676

ctypes.c_void_p]

677

credentials_set.restype = _error_code

678

679

strerror = _library.gnutls_strerror

680

strerror.argtypes = [ctypes.c_int]

681

strerror.restype = ctypes.c_char_p

682

683

certificate_type_get = _library.gnutls_certificate_type_get

684

certificate_type_get.argtypes = [session_t]

685

certificate_type_get.restype = _error_code

686

687

certificate_get_peers = _library.gnutls_certificate_get_peers

688

certificate_get_peers.argtypes = [session_t,

689

ctypes.POINTER(ctypes.c_uint)]

690

certificate_get_peers.restype = ctypes.POINTER(datum_t)

691

692

global_set_log_level = _library.gnutls_global_set_log_level

693

global_set_log_level.argtypes = [ctypes.c_int]

694

global_set_log_level.restype = None

695

696

global_set_log_function = _library.gnutls_global_set_log_function

697

global_set_log_function.argtypes = [log_func]

698

global_set_log_function.restype = None

699

700

deinit = _library.gnutls_deinit

701

deinit.argtypes = [session_t]

702

deinit.restype = None

703

704

handshake = _library.gnutls_handshake

705

handshake.argtypes = [session_t]

706

handshake.restype = _error_code

707

handshake.errcheck = _retry_on_error

708

709

transport_set_ptr = _library.gnutls_transport_set_ptr

710

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

711

transport_set_ptr.restype = None

712

713

bye = _library.gnutls_bye

714

bye.argtypes = [session_t, close_request_t]

715

bye.restype = _error_code

716

bye.errcheck = _retry_on_error

717

718

check_version = _library.gnutls_check_version

719

check_version.argtypes = [ctypes.c_char_p]

720

check_version.restype = ctypes.c_char_p

721

722

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

723

724

openpgp_crt_init = _library.gnutls_openpgp_crt_init

725

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

726

openpgp_crt_init.restype = _error_code

727

728

openpgp_crt_import = _library.gnutls_openpgp_crt_import

729

openpgp_crt_import.argtypes = [openpgp_crt_t,

730

ctypes.POINTER(datum_t),

731

openpgp_crt_fmt_t]

732

openpgp_crt_import.restype = _error_code

733

734

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

735

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

736

ctypes.POINTER(ctypes.c_uint)]

737

openpgp_crt_verify_self.restype = _error_code

738

739

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

740

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

741

openpgp_crt_deinit.restype = None

742

743

openpgp_crt_get_fingerprint = (

744

_library.gnutls_openpgp_crt_get_fingerprint)

745

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

746

ctypes.c_void_p,

747

ctypes.POINTER(

748

ctypes.c_size_t)]

749

openpgp_crt_get_fingerprint.restype = _error_code

750

751

# Remove non-public functions

752

del _error_code, _retry_on_error

753

# Create the global "gnutls" object, simulating a module

754

gnutls = GnuTLS()

755

756

def call_pipe(connection, # : multiprocessing.Connection

757

func, *args, **kwargs):

758

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

759

760

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

761

return value on the provided multiprocessing.Connection.

762

"""

763

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

764

connection.close()

765

382

def timedelta_to_milliseconds(td):

383

"Convert a datetime.timedelta() to milliseconds"

384

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

385

+ (td.seconds * 1000)

386

+ (td.microseconds // 1000))

387

766

388

class Client(object):

767

389

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

768

390

773

395

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

774

396

to see if the client lives.

775

397

'None' if no process is running.

776

checker_callback_tag: a GLib event source tag, or None

398

checker_callback_tag: a gobject event source tag, or None

777

399

checker_command: string; External command which is run to check

778

400

if client lives. %() expansions are done at

779

401

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

780

402

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

781

checker_initiator_tag: a GLib event source tag, or None

403

checker_initiator_tag: a gobject event source tag, or None

782

404

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

783

405

client_structure: Object describing what attributes a client has

784

406

and is used for storing the client at exit

785

407

current_checker_command: string; current running checker_command

786

disable_initiator_tag: a GLib event source tag, or None

408

disable_initiator_tag: a gobject event source tag, or None

787

409

enabled: bool()

788

410

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

789

411

uniquely identify the client

793

415

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

794

416

last_checker_status: integer between 0 and 255 reflecting exit

795

417

status of last checker. -1 reflects crashed

796

checker, -2 means no checker completed yet.

797

last_checker_signal: The signal which killed the last checker, if

798

last_checker_status is -1

418

checker, or None.

799

419

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

800

420

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

801

421

D-Bus identifiers

802

422

secret: bytestring; sent verbatim (over TLS) to client

803

423

timeout: datetime.timedelta(); How long from last_checked_ok

804

424

until this client is disabled

805

extended_timeout: extra long timeout when secret has been sent

425

extended_timeout: extra long timeout when password has been sent

806

426

runtime_expansions: Allowed attributes for runtime expansion.

807

427

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

808

428

disabled, or None

809

server_settings: The server_settings dict from main()

810

429

"""

811

430

812

431

runtime_expansions = ("approval_delay", "approval_duration",

813

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

814

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

815

"last_approval_request", "last_checked_ok",

432

"created", "enabled", "fingerprint",

433

"host", "interval", "last_checked_ok",

816

434

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

817

client_defaults = {

818

"timeout": "PT5M",

819

"extended_timeout": "PT15M",

820

"interval": "PT2M",

821

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

822

"host": "",

823

"approval_delay": "PT0S",

824

"approval_duration": "PT1S",

825

"approved_by_default": "True",

826

"enabled": "True",

827

}

828

435

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

436

"extended_timeout": "15m",

437

"interval": "2m",

438

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

439

"host": "",

440

"approval_delay": "0s",

441

"approval_duration": "1s",

442

"approved_by_default": "True",

443

"enabled": "True",

444

}

445

446

def timeout_milliseconds(self):

447

"Return the 'timeout' attribute in milliseconds"

448

return timedelta_to_milliseconds(self.timeout)

449

450

def extended_timeout_milliseconds(self):

451

"Return the 'extended_timeout' attribute in milliseconds"

452

return timedelta_to_milliseconds(self.extended_timeout)

453

454

def interval_milliseconds(self):

455

"Return the 'interval' attribute in milliseconds"

456

return timedelta_to_milliseconds(self.interval)

457

458

def approval_delay_milliseconds(self):

459

return timedelta_to_milliseconds(self.approval_delay)

460

829

461

@staticmethod

830

462

def config_parser(config):

831

463

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

846

478

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

847

479

"enabled")

848

480

849

# Uppercase and remove spaces from fingerprint for later

850

# comparison purposes with return value from the

851

# fingerprint() function

852

481

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

853

482

.replace(" ", ""))

854

483

if "secret" in section:

855

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

856

.encode("utf-8"),

857

"base64")

484

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

858

485

elif "secfile" in section:

859

486

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

860

487

(section["secfile"])),

861

488

"rb") as secfile:

862

489

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

863

490

else:

864

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

865

.format(section))

491

raise TypeError("No secret or secfile for section %s"

492

% section)

866

493

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

867

494

client["extended_timeout"] = string_to_delta(

868

495

section["extended_timeout"])

874

501

client["checker_command"] = section["checker"]

875

502

client["last_approval_request"] = None

876

503

client["last_checked_ok"] = None

877

client["last_checker_status"] = -2

504

client["last_checker_status"] = None

878

505

879

506

return settings

880

881

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

507

508

509

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

510

"""Note: the 'checker' key in 'config' sets the

511

'checker_command' attribute and *not* the 'checker'

512

attribute."""

882

513

self.name = name

883

if server_settings is None:

884

server_settings = {}

885

self.server_settings = server_settings

886

514

# adding all client settings

887

for setting, value in settings.items():

515

for setting, value in settings.iteritems():

888

516

setattr(self, setting, value)

889

517

890

518

if self.enabled:

896

524

else:

897

525

self.last_enabled = None

898

526

self.expires = None

899

527

900

528

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

529

# Uppercase and remove spaces from fingerprint for later

530

# comparison purposes with return value from the fingerprint()

531

# function

901

532

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

902

533

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

903

534

datetime.datetime.utcnow())

904

535

905

536

# attributes specific for this server instance

906

537

self.checker = None

907

538

self.checker_initiator_tag = None

910

541

self.current_checker_command = None

911

542

self.approved = None

912

543

self.approvals_pending = 0

913

self.changedstate = multiprocessing_manager.Condition(

914

multiprocessing_manager.Lock())

915

self.client_structure = [attr

916

for attr in self.__dict__.keys()

544

self.changedstate = (multiprocessing_manager

545

.Condition(multiprocessing_manager

546

.Lock()))

547

self.client_structure = [attr for attr in

548

self.__dict__.iterkeys()

917

549

if not attr.startswith("_")]

918

550

self.client_structure.append("client_structure")

919

551

920

for name, t in inspect.getmembers(

921

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

552

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

553

lambda obj:

554

isinstance(obj,

555

property)):

922

556

if not name.startswith("_"):

923

557

self.client_structure.append(name)

924

558

932

566

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

933

567

# Already enabled

934

568

return

569

self.send_changedstate()

935

570

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

936

571

self.enabled = True

937

572

self.last_enabled = datetime.datetime.utcnow()

938

573

self.init_checker()

939

self.send_changedstate()

940

574

941

575

def disable(self, quiet=True):

942

576

"""Disable this client."""

943

577

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

944

578

return False

945

579

if not quiet:

580

self.send_changedstate()

581

if not quiet:

946

582

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

947

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

948

GLib.source_remove(self.disable_initiator_tag)

583

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

584

gobject.source_remove(self.disable_initiator_tag)

949

585

self.disable_initiator_tag = None

950

586

self.expires = None

951

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

952

GLib.source_remove(self.checker_initiator_tag)

587

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

588

gobject.source_remove(self.checker_initiator_tag)

953

589

self.checker_initiator_tag = None

954

590

self.stop_checker()

955

591

self.enabled = False

956

if not quiet:

957

self.send_changedstate()

958

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

592

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

959

593

return False

960

594

961

595

def __del__(self):

964

598

def init_checker(self):

965

599

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

966

600

# and every interval from then on.

967

if self.checker_initiator_tag is not None:

968

GLib.source_remove(self.checker_initiator_tag)

969

self.checker_initiator_tag = GLib.timeout_add(

970

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

971

self.start_checker)

601

self.checker_initiator_tag = (gobject.timeout_add

602

(self.interval_milliseconds(),

603

self.start_checker))

972

604

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

973

if self.disable_initiator_tag is not None:

974

GLib.source_remove(self.disable_initiator_tag)

975

self.disable_initiator_tag = GLib.timeout_add(

976

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

605

self.disable_initiator_tag = (gobject.timeout_add

606

(self.timeout_milliseconds(),

607

self.disable))

977

608

# Also start a new checker *right now*.

978

609

self.start_checker()

979

610

980

def checker_callback(self, source, condition, connection,

981

command):

611

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

982

612

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

983

613

self.checker_callback_tag = None

984

614

self.checker = None

985

# Read return code from connection (see call_pipe)

986

returncode = connection.recv()

987

connection.close()

988

989

if returncode >= 0:

990

self.last_checker_status = returncode

991

self.last_checker_signal = None

615

if os.WIFEXITED(condition):

616

self.last_checker_status = os.WEXITSTATUS(condition)

992

617

if self.last_checker_status == 0:

993

618

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

994

619

vars(self))

995

620

self.checked_ok()

996

621

else:

997

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

622

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

623

vars(self))

998

624

else:

999

625

self.last_checker_status = -1

1000

self.last_checker_signal = -returncode

1001

626

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

1002

627

vars(self))

1003

return False

1004

1005

def checked_ok(self):

1006

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

1007

self.last_checked_ok = datetime.datetime.utcnow()

1008

self.last_checker_status = 0

1009

self.last_checker_signal = None

1010

self.bump_timeout()

1011

1012

def bump_timeout(self, timeout=None):

1013

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

628

629

def checked_ok(self, timeout=None):

630

"""Bump up the timeout for this client.

631

632

This should only be called when the client has been seen,

633

alive and well.

634

"""

1014

635

if timeout is None:

1015

636

timeout = self.timeout

637

self.last_checked_ok = datetime.datetime.utcnow()

1016

638

if self.disable_initiator_tag is not None:

1017

GLib.source_remove(self.disable_initiator_tag)

1018

self.disable_initiator_tag = None

639

gobject.source_remove(self.disable_initiator_tag)

1019

640

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

1020

self.disable_initiator_tag = GLib.timeout_add(

1021

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

641

self.disable_initiator_tag = (gobject.timeout_add

642

(timedelta_to_milliseconds

643

(timeout), self.disable))

1022

644

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

1023

645

1024

646

def need_approval(self):

1030

652

If a checker already exists, leave it running and do

1031

653

nothing."""

1032

654

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

1033

# did that, and if a checker (for some reason) started running

1034

# slowly and taking more than 'interval' time, then the client

1035

# would inevitably timeout, since no checker would get a

1036

# chance to run to completion. If we instead leave running

655

# did that, then if a checker (for some reason) started

656

# running slowly and taking more than 'interval' time, the

657

# client would inevitably timeout, since no checker would get

658

# a chance to run to completion. If we instead leave running

1037

659

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

1038

660

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

1039

661

# should be.

1040

662

1041

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

1042

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

1043

self.checker.join()

1044

self.checker = None

663

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

664

try:

665

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

666

except (AttributeError, OSError) as error:

667

if (isinstance(error, OSError)

668

and error.errno != errno.ECHILD):

669

raise error

670

else:

671

if pid:

672

logger.warning("Checker was a zombie")

673

gobject.source_remove(self.checker_callback_tag)

674

self.checker_callback(pid, status,

675

self.current_checker_command)

1045

676

# Start a new checker if needed

1046

677

if self.checker is None:

1047

# Escape attributes for the shell

1048

escaped_attrs = {

1049

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

1050

for attr in self.runtime_expansions }

1051

678

try:

1052

command = self.checker_command % escaped_attrs

1053

except TypeError as error:

1054

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

1055

self.checker_command,

1056

exc_info=error)

1057

return True # Try again later

679

# In case checker_command has exactly one % operator

680

command = self.checker_command % self.host

681

except TypeError:

682

# Escape attributes for the shell

683

escaped_attrs = dict(

684

(attr,

685

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

686

errors=

687

'replace')))

688

for attr in

689

self.runtime_expansions)

690

691

try:

692

command = self.checker_command % escaped_attrs

693

except TypeError as error:

694

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

695

' %s', self.checker_command, error)

696

return True # Try again later

1058

697

self.current_checker_command = command

1059

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

1060

self.name)

1061

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

1062

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

1063

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

1064

# always replaced by /dev/null.)

1065

# The exception is when not debugging but nevertheless

1066

# running in the foreground; use the previously

1067

# created wnull.

1068

popen_args = { "close_fds": True,

1069

"shell": True,

1070

"cwd": "/" }

1071

if (not self.server_settings["debug"]

1072

and self.server_settings["foreground"]):

1073

popen_args.update({"stdout": wnull,

1074

"stderr": wnull })

1075

pipe = multiprocessing.Pipe(duplex = False)

1076

self.checker = multiprocessing.Process(

1077

target = call_pipe,

1078

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

1079

kwargs = popen_args)

1080

self.checker.start()

1081

self.checker_callback_tag = GLib.io_add_watch(

1082

pipe[0].fileno(), GLib.IO_IN,

1083

self.checker_callback, pipe[0], command)

1084

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

698

try:

699

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

700

command, self.name)

701

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

702

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

703

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

704

# always replaced by /dev/null.)

705

self.checker = subprocess.Popen(command,

706

close_fds=True,

707

shell=True, cwd="/")

708

self.checker_callback_tag = (gobject.child_watch_add

709

(self.checker.pid,

710

self.checker_callback,

711

data=command))

712

# The checker may have completed before the gobject

713

# watch was added. Check for this.

714

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

715

if pid:

716

gobject.source_remove(self.checker_callback_tag)

717

self.checker_callback(pid, status, command)

718

except OSError as error:

719

logger.error("Failed to start subprocess: %s",

720

error)

721

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

1085

722

return True

1086

723

1087

724

def stop_checker(self):

1088

725

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

1089

726

if self.checker_callback_tag:

1090

GLib.source_remove(self.checker_callback_tag)

727

gobject.source_remove(self.checker_callback_tag)

1091

728

self.checker_callback_tag = None

1092

729

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

1093

730

return

1094

731

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

1095

self.checker.terminate()

732

try:

733

os.kill(self.checker.pid, signal.SIGTERM)

734

#time.sleep(0.5)

735

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

736

# os.kill(self.checker.pid, signal.SIGKILL)

737

except OSError as error:

738

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

739

raise

1096

740

self.checker = None

1097

741

1098

742

1099

def dbus_service_property(dbus_interface,

1100

signature="v",

1101

access="readwrite",

1102

byte_arrays=False):

743

def dbus_service_property(dbus_interface, signature="v",

744

access="readwrite", byte_arrays=False):

1103

745

"""Decorators for marking methods of a DBusObjectWithProperties to

1104

746

become properties on the D-Bus.

1105

747

1114

756

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

1115

757

if byte_arrays and signature != "ay":

1116

758

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

1117

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

1118

759

" signature %r" % signature)

1119

760

def decorator(func):

1120

761

func._dbus_is_property = True

1121

762

func._dbus_interface = dbus_interface

1126

767

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

1127

768

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1128

769

return func

1129

1130

return decorator

1131

1132

1133

def dbus_interface_annotations(dbus_interface):

1134

"""Decorator for marking functions returning interface annotations

1135

1136

Usage:

1137

1138

@dbus_interface_annotations("org.example.Interface")

1139

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

1140

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

1141

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

1142

"false"}

1143

"""

1144

1145

def decorator(func):

1146

func._dbus_is_interface = True

1147

func._dbus_interface = dbus_interface

1148

func._dbus_name = dbus_interface

1149

return func

1150

1151

return decorator

1152

1153

1154

def dbus_annotations(annotations):

1155

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

1156

Usage:

1157

1158

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

1159

"org.freedesktop.DBus.Property."

1160

"EmitsChangedSignal": "false"})

1161

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

1162

access="r")

1163

def Property_dbus_property(self):

1164

return dbus.Boolean(False)

1165

1166

See also the DBusObjectWithAnnotations class.

1167

"""

1168

1169

def decorator(func):

1170

func._dbus_annotations = annotations

1171

return func

1172

1173

770

return decorator

1174

771

1175

772

1176

773

class DBusPropertyException(dbus.exceptions.DBusException):

1177

774

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

1178

775

"""

1179

pass

776

def __unicode__(self):

777

return unicode(str(self))

1180

778

1181

779

1182

780

class DBusPropertyAccessException(DBusPropertyException):

1191

789

pass

1192

790

1193

791

1194

class DBusObjectWithAnnotations(dbus.service.Object):

1195

"""A D-Bus object with annotations.

1196

1197

Classes inheriting from this can use the dbus_annotations

1198

decorator to add annotations to methods or signals.

1199

"""

1200

1201

@staticmethod

1202

def _is_dbus_thing(thing):

1203

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

1204

1205

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

1206

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

1207

"""

1208

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

1209

False)

1210

1211

def _get_all_dbus_things(self, thing):

1212

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

1213

"""

1214

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

1215

athing.__get__(self))

1216

for cls in self.__class__.__mro__

1217

for name, athing in

1218

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

1219

1220

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1221

out_signature = "s",

1222

path_keyword = 'object_path',

1223

connection_keyword = 'connection')

1224

def Introspect(self, object_path, connection):

1225

"""Overloading of standard D-Bus method.

1226

1227

Inserts annotation tags on methods and signals.

1228

"""

1229

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

1230

connection)

1231

try:

1232

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

1233

1234

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

1235

# Add annotation tags

1236

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

1237

for tag in if_tag.getElementsByTagName(typ):

1238

annots = dict()

1239

for name, prop in (self.

1240

_get_all_dbus_things(typ)):

1241

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

1242

and prop._dbus_interface

1243

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

1244

annots.update(getattr(

1245

prop, "_dbus_annotations", {}))

1246

for name, value in annots.items():

1247

ann_tag = document.createElement(

1248

"annotation")

1249

ann_tag.setAttribute("name", name)

1250

ann_tag.setAttribute("value", value)

1251

tag.appendChild(ann_tag)

1252

# Add interface annotation tags

1253

for annotation, value in dict(

1254

itertools.chain.from_iterable(

1255

annotations().items()

1256

for name, annotations

1257

in self._get_all_dbus_things("interface")

1258

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

1259

)).items():

1260

ann_tag = document.createElement("annotation")

1261

ann_tag.setAttribute("name", annotation)

1262

ann_tag.setAttribute("value", value)

1263

if_tag.appendChild(ann_tag)

1264

# Fix argument name for the Introspect method itself

1265

if (if_tag.getAttribute("name")

1266

== dbus.INTROSPECTABLE_IFACE):

1267

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

1268

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

1269

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

1270

if (arg.getAttribute("direction")

1271

== "out"):

1272

arg.setAttribute("name",

1273

"xml_data")

1274

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

1275

document.unlink()

1276

except (AttributeError, xml.dom.DOMException,

1277

xml.parsers.expat.ExpatError) as error:

1278

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

1279

exc_info=error)

1280

return xmlstring

1281

1282

1283

class DBusObjectWithProperties(DBusObjectWithAnnotations):

792

class DBusObjectWithProperties(dbus.service.Object):

1284

793

"""A D-Bus object with properties.

1285

794

1286

795

Classes inheriting from this can use the dbus_service_property

1288

797

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

1289

798

"""

1290

799

800

@staticmethod

801

def _is_dbus_property(obj):

802

return getattr(obj, "_dbus_is_property", False)

803

804

def _get_all_dbus_properties(self):

805

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

806

"""

807

return ((prop.__get__(self)._dbus_name, prop.__get__(self))

808

for cls in self.__class__.__mro__

809

for name, prop in

810

inspect.getmembers(cls, self._is_dbus_property))

811

1291

812

def _get_dbus_property(self, interface_name, property_name):

1292

813

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

1293

814

property with the specified name and interface.

1294

815

"""

1295

for cls in self.__class__.__mro__:

1296

for name, value in inspect.getmembers(

1297

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

816

for cls in self.__class__.__mro__:

817

for name, value in (inspect.getmembers

818

(cls, self._is_dbus_property)):

1298

819

if (value._dbus_name == property_name

1299

820

and value._dbus_interface == interface_name):

1300

821

return value.__get__(self)

1301

822

1302

823

# No such property

1303

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

1304

self.dbus_object_path, interface_name, property_name))

1305

1306

@classmethod

1307

def _get_all_interface_names(cls):

1308

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

1309

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

1310

"_dbus_interface", None)

1311

for x in (inspect.getmro(cls))

1312

for attr in dir(x))

1313

if name is not None)

1314

1315

@dbus.service.method(dbus.PROPERTIES_IFACE,

1316

in_signature="ss",

824

raise DBusPropertyNotFound(self.dbus_object_path + ":"

825

+ interface_name + "."

826

+ property_name)

827

828

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

1317

829

out_signature="v")

1318

830

def Get(self, interface_name, property_name):

1319

831

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

1337

849

# The byte_arrays option is not supported yet on

1338

850

# signatures other than "ay".

1339

851

if prop._dbus_signature != "ay":

1340

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

1341

"'ay' signature {!r}"

1342

.format(prop._dbus_signature))

852

raise ValueError

1343

853

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

1344

854

for byte in value))

1345

855

prop(value)

1346

856

1347

@dbus.service.method(dbus.PROPERTIES_IFACE,

1348

in_signature="s",

857

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

1349

858

out_signature="a{sv}")

1350

859

def GetAll(self, interface_name):

1351

860

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

1354

863

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

1355

864

"""

1356

865

properties = {}

1357

for name, prop in self._get_all_dbus_things("property"):

866

for name, prop in self._get_all_dbus_properties():

1358

867

if (interface_name

1359

868

and interface_name != prop._dbus_interface):

1360

869

# Interface non-empty but did not match

1366

875

if not hasattr(value, "variant_level"):

1367

876

properties[name] = value

1368

877

continue

1369

properties[name] = type(value)(

1370

value, variant_level = value.variant_level + 1)

878

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

879

value.variant_level+1)

1371

880

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

1372

881

1373

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

1374

def PropertiesChanged(self, interface_name, changed_properties,

1375

invalidated_properties):

1376

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

1377

standard.

1378

"""

1379

pass

1380

1381

882

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1382

883

out_signature="s",

1383

884

path_keyword='object_path',

1384

885

connection_keyword='connection')

1385

886

def Introspect(self, object_path, connection):

1386

"""Overloading of standard D-Bus method.

1387

1388

Inserts property tags and interface annotation tags.

887

"""Standard D-Bus method, overloaded to insert property tags.

1389

888

"""

1390

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1391

object_path,

1392

connection)

889

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

890

connection)

1393

891

try:

1394

892

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

1395

1396

893

def make_tag(document, name, prop):

1397

894

e = document.createElement("property")

1398

895

e.setAttribute("name", name)

1399

896

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

1400

897

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

1401

898

return e

1402

1403

899

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

1404

# Add property tags

1405

900

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

1406

901

for name, prop

1407

in self._get_all_dbus_things("property")

902

in self._get_all_dbus_properties()

1408

903

if prop._dbus_interface

1409

904

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

1410

905

if_tag.appendChild(tag)

1411

# Add annotation tags for properties

1412

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

1413

annots = dict()

1414

for name, prop in self._get_all_dbus_things(

1415

"property"):

1416

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

1417

and prop._dbus_interface

1418

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

1419

annots.update(getattr(

1420

prop, "_dbus_annotations", {}))

1421

for name, value in annots.items():

1422

ann_tag = document.createElement(

1423

"annotation")

1424

ann_tag.setAttribute("name", name)

1425

ann_tag.setAttribute("value", value)

1426

tag.appendChild(ann_tag)

1427

906

# Add the names to the return values for the

1428

907

# "org.freedesktop.DBus.Properties" methods

1429

908

if (if_tag.getAttribute("name")

1444

923

except (AttributeError, xml.dom.DOMException,

1445

924

xml.parsers.expat.ExpatError) as error:

1446

925

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

1447

exc_info=error)

1448

return xmlstring

1449

1450

try:

1451

dbus.OBJECT_MANAGER_IFACE

1452

except AttributeError:

1453

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

1454

1455

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1456

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

1457

1458

Classes inheriting from this exposes the standard

1459

GetManagedObjects call and the InterfacesAdded and

1460

InterfacesRemoved signals on the standard

1461

"org.freedesktop.DBus.ObjectManager" interface.

1462

1463

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

1464

manually.

1465

"""

1466

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1467

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

1468

def GetManagedObjects(self):

1469

"""This function must be overridden"""

1470

raise NotImplementedError()

1471

1472

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1473

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

1474

def InterfacesAdded(self, object_path, interfaces_and_properties):

1475

pass

1476

1477

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

1478

def InterfacesRemoved(self, object_path, interfaces):

1479

pass

1480

1481

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1482

out_signature = "s",

1483

path_keyword = 'object_path',

1484

connection_keyword = 'connection')

1485

def Introspect(self, object_path, connection):

1486

"""Overloading of standard D-Bus method.

1487

1488

Override return argument name of GetManagedObjects to be

1489

"objpath_interfaces_and_properties"

1490

"""

1491

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1492

object_path,

1493

connection)

1494

try:

1495

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

1496

1497

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

1498

# Fix argument name for the GetManagedObjects method

1499

if (if_tag.getAttribute("name")

1500

== dbus.OBJECT_MANAGER_IFACE):

1501

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

1502

if (cn.getAttribute("name")

1503

== "GetManagedObjects"):

1504

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

1505

if (arg.getAttribute("direction")

1506

== "out"):

1507

arg.setAttribute(

1508

"name",

1509

"objpath_interfaces"

1510

"_and_properties")

1511

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

1512

document.unlink()

1513

except (AttributeError, xml.dom.DOMException,

1514

xml.parsers.expat.ExpatError) as error:

1515

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

1516

exc_info = error)

1517

return xmlstring

1518

1519

def datetime_to_dbus(dt, variant_level=0):

926

error)

927

return xmlstring

928

929

930

def datetime_to_dbus (dt, variant_level=0):

1520

931

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

1521

932

if dt is None:

1522

933

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

1523

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

1524

1525

1526

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1527

"""A class decorator; applied to a subclass of

1528

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

1529

interface names according to the "alt_interface_names" mapping.

1530

Usage:

1531

1532

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

1533

"net.example.AlternateInterface"})

1534

class SampleDBusObject(dbus.service.Object):

1535

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

1536

def SampleDBusMethod():

1537

pass

1538

1539

The above "SampleDBusMethod" on "SampleDBusObject" will be

1540

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

1541

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

1542

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

1543

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

1544

1545

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

1546

(from DBusObjectWithProperties) and interfaces (from the

1547

dbus_interface_annotations decorator).

934

return dbus.String(dt.isoformat(),

935

variant_level=variant_level)

936

937

938

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

939

.__metaclass__):

940

"""Applied to an empty subclass of a D-Bus object, this metaclass

941

will add additional D-Bus attributes matching a certain pattern.

1548

942

"""

1549

1550

def wrapper(cls):

1551

for orig_interface_name, alt_interface_name in (

1552

alt_interface_names.items()):

1553

attr = {}

1554

interface_names = set()

1555

# Go though all attributes of the class

1556

for attrname, attribute in inspect.getmembers(cls):

943

def __new__(mcs, name, bases, attr):

944

# Go through all the base classes which could have D-Bus

945

# methods, signals, or properties in them

946

for base in (b for b in bases

947

if issubclass(b, dbus.service.Object)):

948

# Go though all attributes of the base class

949

for attrname, attribute in inspect.getmembers(base):

1557

950

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

1558

951

# with the wrong interface name

1559

952

if (not hasattr(attribute, "_dbus_interface")

1560

or not attribute._dbus_interface.startswith(

1561

orig_interface_name)):

953

or not attribute._dbus_interface

954

.startswith("se.recompile.Mandos")):

1562

955

continue

1563

956

# Create an alternate D-Bus interface name based on

1564

957

# the current name

1565

alt_interface = attribute._dbus_interface.replace(

1566

orig_interface_name, alt_interface_name)

1567

interface_names.add(alt_interface)

958

alt_interface = (attribute._dbus_interface

959

.replace("se.recompile.Mandos",

960

"se.bsnet.fukt.Mandos"))

1568

961

# Is this a D-Bus signal?

1569

962

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

1570

# Extract the original non-method undecorated

1571

# function by black magic

1572

if sys.version_info.major == 2:

1573

nonmethod_func = (dict(

963

# Extract the original non-method function by

964

# black magic

965

nonmethod_func = (dict(

1574

966

zip(attribute.func_code.co_freevars,

1575

attribute.__closure__))

1576

["func"].cell_contents)

1577

else:

1578

nonmethod_func = (dict(

1579

zip(attribute.__code__.co_freevars,

1580

attribute.__closure__))

1581

["func"].cell_contents)

967

attribute.__closure__))["func"]

968

.cell_contents)

1582

969

# Create a new, but exactly alike, function

1583

970

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

1584

971

# with the alternate D-Bus interface name

1585

new_function = copy_function(nonmethod_func)

1586

new_function = (dbus.service.signal(

1587

alt_interface,

1588

attribute._dbus_signature)(new_function))

1589

# Copy annotations, if any

1590

try:

1591

new_function._dbus_annotations = dict(

1592

attribute._dbus_annotations)

1593

except AttributeError:

1594

pass

972

new_function = (dbus.service.signal

973

(alt_interface,

974

attribute._dbus_signature)

975

(types.FunctionType(

976

nonmethod_func.func_code,

977

nonmethod_func.func_globals,

978

nonmethod_func.func_name,

979

nonmethod_func.func_defaults,

980

nonmethod_func.func_closure)))

1595

981

# Define a creator of a function to call both the

1596

# original and alternate functions, so both the

1597

# original and alternate signals gets sent when

1598

# the function is called

982

# old and new functions, so both the old and new

983

# signals gets sent when the function is called

1599

984

def fixscope(func1, func2):

1600

985

"""This function is a scope container to pass

1601

986

func1 and func2 to the "call_both" function

1602

987

outside of its arguments"""

1603

1604

@functools.wraps(func2)

1605

988

def call_both(*args, **kwargs):

1606

989

"""This function will emit two D-Bus

1607

990

signals by calling func1 and func2"""

1608

991

func1(*args, **kwargs)

1609

992

func2(*args, **kwargs)

1610

# Make wrapper function look like a D-Bus signal

1611

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

1612

if name.startswith("_dbus_"):

1613

setattr(call_both, name, attr)

1614

1615

993

return call_both

1616

994

# Create the "call_both" function and add it to

1617

995

# the class

1618

attr[attrname] = fixscope(attribute, new_function)

996

attr[attrname] = fixscope(attribute,

997

new_function)

1619

998

# Is this a D-Bus method?

1620

999

elif getattr(attribute, "_dbus_is_method", False):

1621

1000

# Create a new, but exactly alike, function

1622

1001

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

1623

1002

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

1624

1003

# to the class.

1625

attr[attrname] = (

1626

dbus.service.method(

1627

alt_interface,

1628

attribute._dbus_in_signature,

1629

attribute._dbus_out_signature)

1630

(copy_function(attribute)))

1631

# Copy annotations, if any

1632

try:

1633

attr[attrname]._dbus_annotations = dict(

1634

attribute._dbus_annotations)

1635

except AttributeError:

1636

pass

1004

attr[attrname] = (dbus.service.method

1005

(alt_interface,

1006

attribute._dbus_in_signature,

1007

attribute._dbus_out_signature)

1008

(types.FunctionType

1009

(attribute.func_code,

1010

attribute.func_globals,

1011

attribute.func_name,

1012

attribute.func_defaults,

1013

attribute.func_closure)))

1637

1014

# Is this a D-Bus property?

1638

1015

elif getattr(attribute, "_dbus_is_property", False):

1639

1016

# Create a new, but exactly alike, function

1640

1017

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

1641

1018

# property with the alternate D-Bus interface

1642

1019

# name. Add it to the class.

1643

attr[attrname] = (dbus_service_property(

1644

alt_interface, attribute._dbus_signature,

1645

attribute._dbus_access,

1646

attribute._dbus_get_args_options

1647

["byte_arrays"])

1648

(copy_function(attribute)))

1649

# Copy annotations, if any

1650

try:

1651

attr[attrname]._dbus_annotations = dict(

1652

attribute._dbus_annotations)

1653

except AttributeError:

1654

pass

1655

# Is this a D-Bus interface?

1656

elif getattr(attribute, "_dbus_is_interface", False):

1657

# Create a new, but exactly alike, function

1658

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

1659

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

1660

# to the class.

1661

attr[attrname] = (

1662

dbus_interface_annotations(alt_interface)

1663

(copy_function(attribute)))

1664

if deprecate:

1665

# Deprecate all alternate interfaces

1666

iname="_AlternateDBusNames_interface_annotation{}"

1667

for interface_name in interface_names:

1668

1669

@dbus_interface_annotations(interface_name)

1670

def func(self):

1671

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

1672

"true" }

1673

# Find an unused name

1674

for aname in (iname.format(i)

1675

for i in itertools.count()):

1676

if aname not in attr:

1677

attr[aname] = func

1678

break

1679

if interface_names:

1680

# Replace the class with a new subclass of it with

1681

# methods, signals, etc. as created above.

1682

if sys.version_info.major == 2:

1683

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

1684

(cls, ), attr)

1685

else:

1686

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

1687

(cls, ), attr)

1688

return cls

1689

1690

return wrapper

1691

1692

1693

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

1694

"se.bsnet.fukt.Mandos"})

1020

attr[attrname] = (dbus_service_property

1021

(alt_interface,

1022

attribute._dbus_signature,

1023

attribute._dbus_access,

1024

attribute

1025

._dbus_get_args_options

1026

["byte_arrays"])

1027

(types.FunctionType

1028

(attribute.func_code,

1029

attribute.func_globals,

1030

attribute.func_name,

1031

attribute.func_defaults,

1032

attribute.func_closure)))

1033

return type.__new__(mcs, name, bases, attr)

1034

1035

1695

1036

class ClientDBus(Client, DBusObjectWithProperties):

1696

1037

"""A Client class using D-Bus

1697

1038

1701

1042

"""

1702

1043

1703

1044

runtime_expansions = (Client.runtime_expansions

1704

+ ("dbus_object_path", ))

1705

1706

_interface = "se.recompile.Mandos.Client"

1045

+ ("dbus_object_path",))

1707

1046

1708

1047

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

1709

1048

1710

1049

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

1711

1050

self.bus = bus

1712

1051

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

1052

self._approvals_pending = 0

1053

1054

self._approvals_pending = 0

1713

1055

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

1714

1056

# the D-Bus

1715

client_object_name = str(self.name).translate(

1057

client_object_name = unicode(self.name).translate(

1716

1058

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

1717

1059

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

1718

self.dbus_object_path = dbus.ObjectPath(

1719

"/clients/" + client_object_name)

1060

self.dbus_object_path = (dbus.ObjectPath

1061

("/clients/" + client_object_name))

1720

1062

DBusObjectWithProperties.__init__(self, self.bus,

1721

1063

self.dbus_object_path)

1722

1723

def notifychangeproperty(transform_func, dbus_name,

1724

type_func=lambda x: x,

1725

variant_level=1,

1726

invalidate_only=False,

1727

_interface=_interface):

1064

1065

def notifychangeproperty(transform_func,

1066

dbus_name, type_func=lambda x: x,

1067

variant_level=1):

1728

1068

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

1729

1069

its changes to DBus.

1730

1070

1735

1075

to the D-Bus. Default: no transform

1736

1076

variant_level: D-Bus variant level. Default: 1

1737

1077

"""

1738

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

1739

1078

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

1740

1079

def setter(self, value):

1741

1080

if hasattr(self, "dbus_object_path"):

1742

1081

if (not hasattr(self, attrname) or

1743

1082

type_func(getattr(self, attrname, None))

1744

1083

!= type_func(value)):

1745

if invalidate_only:

1746

self.PropertiesChanged(

1747

_interface, dbus.Dictionary(),

1748

dbus.Array((dbus_name, )))

1749

else:

1750

dbus_value = transform_func(

1751

type_func(value),

1752

variant_level = variant_level)

1753

self.PropertyChanged(dbus.String(dbus_name),

1754

dbus_value)

1755

self.PropertiesChanged(

1756

_interface,

1757

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

1758

dbus_value }),

1759

dbus.Array())

1084

dbus_value = transform_func(type_func(value),

1085

variant_level

1086

=variant_level)

1087

self.PropertyChanged(dbus.String(dbus_name),

1088

dbus_value)

1760

1089

setattr(self, attrname, value)

1761

1090

1762

1091

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

1763

1092

1093

1764

1094

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1765

1095

approvals_pending = notifychangeproperty(dbus.Boolean,

1766

1096

"ApprovalPending",

1768

1098

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

1769

1099

last_enabled = notifychangeproperty(datetime_to_dbus,

1770

1100

"LastEnabled")

1771

checker = notifychangeproperty(

1772

dbus.Boolean, "CheckerRunning",

1773

type_func = lambda checker: checker is not None)

1101

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

1102

type_func = lambda checker:

1103

checker is not None)

1774

1104

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1775

1105

"LastCheckedOK")

1776

last_checker_status = notifychangeproperty(dbus.Int16,

1777

"LastCheckerStatus")

1778

1106

last_approval_request = notifychangeproperty(

1779

1107

datetime_to_dbus, "LastApprovalRequest")

1780

1108

approved_by_default = notifychangeproperty(dbus.Boolean,

1781

1109

"ApprovedByDefault")

1782

approval_delay = notifychangeproperty(

1783

dbus.UInt64, "ApprovalDelay",

1784

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

1110

approval_delay = notifychangeproperty(dbus.UInt64,

1111

"ApprovalDelay",

1112

type_func =

1113

timedelta_to_milliseconds)

1785

1114

approval_duration = notifychangeproperty(

1786

1115

dbus.UInt64, "ApprovalDuration",

1787

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

1116

type_func = timedelta_to_milliseconds)

1788

1117

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

1789

timeout = notifychangeproperty(

1790

dbus.UInt64, "Timeout",

1791

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

1118

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

1119

type_func =

1120

timedelta_to_milliseconds)

1792

1121

extended_timeout = notifychangeproperty(

1793

1122

dbus.UInt64, "ExtendedTimeout",

1794

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

1795

interval = notifychangeproperty(

1796

dbus.UInt64, "Interval",

1797

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

1123

type_func = timedelta_to_milliseconds)

1124

interval = notifychangeproperty(dbus.UInt64,

1125

"Interval",

1126

type_func =

1127

timedelta_to_milliseconds)

1798

1128

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

1799

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

1800

invalidate_only=True)

1801

1129

1802

1130

del notifychangeproperty

1803

1131

1810

1138

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

1811

1139

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

1812

1140

1813

def checker_callback(self, source, condition,

1814

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

1815

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

1816

connection, command, *args,

1817

**kwargs)

1818

exitstatus = self.last_checker_status

1819

if exitstatus >= 0:

1141

def checker_callback(self, pid, condition, command,

1142

*args, **kwargs):

1143

self.checker_callback_tag = None

1144

self.checker = None

1145

if os.WIFEXITED(condition):

1146

exitstatus = os.WEXITSTATUS(condition)

1820

1147

# Emit D-Bus signal

1821

1148

self.CheckerCompleted(dbus.Int16(exitstatus),

1822

# This is specific to GNU libC

1823

dbus.Int64(exitstatus << 8),

1149

dbus.Int64(condition),

1824

1150

dbus.String(command))

1825

1151

else:

1826

1152

# Emit D-Bus signal

1827

1153

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

1828

dbus.Int64(

1829

# This is specific to GNU libC

1830

(exitstatus << 8)

1831

| self.last_checker_signal),

1154

dbus.Int64(condition),

1832

1155

dbus.String(command))

1833

return ret

1156

1157

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

1158

*args, **kwargs)

1834

1159

1835

1160

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

1836

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

1161

old_checker = self.checker

1162

if self.checker is not None:

1163

old_checker_pid = self.checker.pid

1164

else:

1165

old_checker_pid = None

1837

1166

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

1838

1167

# Only if new checker process was started

1839

1168

if (self.checker is not None

1847

1176

return False

1848

1177

1849

1178

def approve(self, value=True):

1179

self.send_changedstate()

1850

1180

self.approved = value

1851

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

1852

* 1000), self._reset_approved)

1853

self.send_changedstate()

1181

gobject.timeout_add(timedelta_to_milliseconds

1182

(self.approval_duration),

1183

self._reset_approved)

1184

1854

1185

1855

1186

## D-Bus methods, signals & properties

1856

1857

## Interfaces

1187

_interface = "se.recompile.Mandos.Client"

1858

1188

1859

1189

## Signals

1860

1190

1871

1201

pass

1872

1202

1873

1203

# PropertyChanged - signal

1874

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

1875

1204

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

1876

1205

def PropertyChanged(self, property, value):

1877

1206

"D-Bus signal"

1898

1227

"D-Bus signal"

1899

1228

return self.need_approval()

1900

1229

1230

# NeRwequest - signal

1231

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

1232

def NewRequest(self, ip):

1233

"""D-Bus signal

1234

Is sent after a client request a password.

1235

"""

1236

pass

1237

1901

1238

## Methods

1902

1239

1903

1240

# Approve - method

1911

1248

self.checked_ok()

1912

1249

1913

1250

# Enable - method

1914

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

1915

1251

@dbus.service.method(_interface)

1916

1252

def Enable(self):

1917

1253

"D-Bus method"

1918

1254

self.enable()

1919

1255

1920

1256

# StartChecker - method

1921

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

1922

1257

@dbus.service.method(_interface)

1923

1258

def StartChecker(self):

1924

1259

"D-Bus method"

1925

1260

self.start_checker()

1926

1261

1927

1262

# Disable - method

1928

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

1929

1263

@dbus.service.method(_interface)

1930

1264

def Disable(self):

1931

1265

"D-Bus method"

1932

1266

self.disable()

1933

1267

1934

1268

# StopChecker - method

1935

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

1936

1269

@dbus.service.method(_interface)

1937

1270

def StopChecker(self):

1938

1271

self.stop_checker()

1945

1278

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

1946

1279

1947

1280

# ApprovedByDefault - property

1948

@dbus_service_property(_interface,

1949

signature="b",

1281

@dbus_service_property(_interface, signature="b",

1950

1282

access="readwrite")

1951

1283

def ApprovedByDefault_dbus_property(self, value=None):

1952

1284

if value is None: # get

1954

1286

self.approved_by_default = bool(value)

1955

1287

1956

1288

# ApprovalDelay - property

1957

@dbus_service_property(_interface,

1958

signature="t",

1289

@dbus_service_property(_interface, signature="t",

1959

1290

access="readwrite")

1960

1291

def ApprovalDelay_dbus_property(self, value=None):

1961

1292

if value is None: # get

1962

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

1963

* 1000)

1293

return dbus.UInt64(self.approval_delay_milliseconds())

1964

1294

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

1965

1295

1966

1296

# ApprovalDuration - property

1967

@dbus_service_property(_interface,

1968

signature="t",

1297

@dbus_service_property(_interface, signature="t",

1969

1298

access="readwrite")

1970

1299

def ApprovalDuration_dbus_property(self, value=None):

1971

1300

if value is None: # get

1972

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

1973

* 1000)

1301

return dbus.UInt64(timedelta_to_milliseconds(

1302

self.approval_duration))

1974

1303

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

1975

1304

1976

1305

# Name - property

1977

@dbus_annotations(

1978

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

1979

1306

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

1980

1307

def Name_dbus_property(self):

1981

1308

return dbus.String(self.name)

1982

1309

1983

1310

# Fingerprint - property

1984

@dbus_annotations(

1985

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

1986

1311

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

1987

1312

def Fingerprint_dbus_property(self):

1988

1313

return dbus.String(self.fingerprint)

1989

1314

1990

1315

# Host - property

1991

@dbus_service_property(_interface,

1992

signature="s",

1316

@dbus_service_property(_interface, signature="s",

1993

1317

access="readwrite")

1994

1318

def Host_dbus_property(self, value=None):

1995

1319

if value is None: # get

1996

1320

return dbus.String(self.host)

1997

self.host = str(value)

1321

self.host = unicode(value)

1998

1322

1999

1323

# Created - property

2000

@dbus_annotations(

2001

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

2002

1324

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

2003

1325

def Created_dbus_property(self):

2004

1326

return datetime_to_dbus(self.created)

2009

1331

return datetime_to_dbus(self.last_enabled)

2010

1332

2011

1333

# Enabled - property

2012

@dbus_service_property(_interface,

2013

signature="b",

1334

@dbus_service_property(_interface, signature="b",

2014

1335

access="readwrite")

2015

1336

def Enabled_dbus_property(self, value=None):

2016

1337

if value is None: # get

2021

1342

self.disable()

2022

1343

2023

1344

# LastCheckedOK - property

2024

@dbus_service_property(_interface,

2025

signature="s",

1345

@dbus_service_property(_interface, signature="s",

2026

1346

access="readwrite")

2027

1347

def LastCheckedOK_dbus_property(self, value=None):

2028

1348

if value is not None:

2030

1350

return

2031

1351

return datetime_to_dbus(self.last_checked_ok)

2032

1352

2033

# LastCheckerStatus - property

2034

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

2035

def LastCheckerStatus_dbus_property(self):

2036

return dbus.Int16(self.last_checker_status)

2037

2038

1353

# Expires - property

2039

1354

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

2040

1355

def Expires_dbus_property(self):

2046

1361

return datetime_to_dbus(self.last_approval_request)

2047

1362

2048

1363

# Timeout - property

2049

@dbus_service_property(_interface,

2050

signature="t",

1364

@dbus_service_property(_interface, signature="t",

2051

1365

access="readwrite")

2052

1366

def Timeout_dbus_property(self, value=None):

2053

1367

if value is None: # get

2054

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

2055

old_timeout = self.timeout

1368

return dbus.UInt64(self.timeout_milliseconds())

2056

1369

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

2057

# Reschedule disabling

1370

# Reschedule timeout

2058

1371

if self.enabled:

2059

1372

now = datetime.datetime.utcnow()

2060

self.expires += self.timeout - old_timeout

2061

if self.expires <= now:

1373

time_to_die = timedelta_to_milliseconds(

1374

(self.last_checked_ok + self.timeout) - now)

1375

if time_to_die <= 0:

2062

1376

# The timeout has passed

2063

1377

self.disable()

2064

1378

else:

1379

self.expires = (now +

1380

datetime.timedelta(milliseconds =

1381

time_to_die))

2065

1382

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

2066

1383

is None):

2067

1384

return

2068

GLib.source_remove(self.disable_initiator_tag)

2069

self.disable_initiator_tag = GLib.timeout_add(

2070

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

2071

self.disable)

1385

gobject.source_remove(self.disable_initiator_tag)

1386

self.disable_initiator_tag = (gobject.timeout_add

1387

(time_to_die,

1388

self.disable))

2072

1389

2073

1390

# ExtendedTimeout - property

2074

@dbus_service_property(_interface,

2075

signature="t",

1391

@dbus_service_property(_interface, signature="t",

2076

1392

access="readwrite")

2077

1393

def ExtendedTimeout_dbus_property(self, value=None):

2078

1394

if value is None: # get

2079

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

2080

* 1000)

1395

return dbus.UInt64(self.extended_timeout_milliseconds())

2081

1396

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

2082

1397

2083

1398

# Interval - property

2084

@dbus_service_property(_interface,

2085

signature="t",

1399

@dbus_service_property(_interface, signature="t",

2086

1400

access="readwrite")

2087

1401

def Interval_dbus_property(self, value=None):

2088

1402

if value is None: # get

2089

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

1403

return dbus.UInt64(self.interval_milliseconds())

2090

1404

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

2091

1405

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

2092

1406

return

2093

1407

if self.enabled:

2094

1408

# Reschedule checker run

2095

GLib.source_remove(self.checker_initiator_tag)

2096

self.checker_initiator_tag = GLib.timeout_add(

2097

value, self.start_checker)

2098

self.start_checker() # Start one now, too

1409

gobject.source_remove(self.checker_initiator_tag)

1410

self.checker_initiator_tag = (gobject.timeout_add

1411

(value, self.start_checker))

1412

self.start_checker() # Start one now, too

2099

1413

2100

1414

# Checker - property

2101

@dbus_service_property(_interface,

2102

signature="s",

1415

@dbus_service_property(_interface, signature="s",

2103

1416

access="readwrite")

2104

1417

def Checker_dbus_property(self, value=None):

2105

1418

if value is None: # get

2106

1419

return dbus.String(self.checker_command)

2107

self.checker_command = str(value)

1420

self.checker_command = unicode(value)

2108

1421

2109

1422

# CheckerRunning - property

2110

@dbus_service_property(_interface,

2111

signature="b",

1423

@dbus_service_property(_interface, signature="b",

2112

1424

access="readwrite")

2113

1425

def CheckerRunning_dbus_property(self, value=None):

2114

1426

if value is None: # get

2119

1431

self.stop_checker()

2120

1432

2121

1433

# ObjectPath - property

2122

@dbus_annotations(

2123

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

2124

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

2125

1434

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

2126

1435

def ObjectPath_dbus_property(self):

2127

1436

return self.dbus_object_path # is already a dbus.ObjectPath

2128

1437

2129

1438

# Secret = property

2130

@dbus_annotations(

2131

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

2132

"invalidates"})

2133

@dbus_service_property(_interface,

2134

signature="ay",

2135

access="write",

2136

byte_arrays=True)

1439

@dbus_service_property(_interface, signature="ay",

1440

access="write", byte_arrays=True)

2137

1441

def Secret_dbus_property(self, value):

2138

self.secret = bytes(value)

1442

self.secret = str(value)

2139

1443

2140

1444

del _interface

2141

1445

2145

1449

self._pipe = child_pipe

2146

1450

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

2147

1451

if not self._pipe.recv():

2148

raise KeyError(fpr)

1452

raise KeyError()

2149

1453

2150

1454

def __getattribute__(self, name):

2151

1455

if name == '_pipe':

2155

1459

if data[0] == 'data':

2156

1460

return data[1]

2157

1461

if data[0] == 'function':

2158

2159

1462

def func(*args, **kwargs):

2160

1463

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

2161

1464

return self._pipe.recv()[1]

2162

2163

1465

return func

2164

1466

2165

1467

def __setattr__(self, name, value):

2168

1470

self._pipe.send(('setattr', name, value))

2169

1471

2170

1472

1473

class ClientDBusTransitional(ClientDBus):

1474

__metaclass__ = AlternateDBusNamesMetaclass

1475

1476

2171

1477

class ClientHandler(socketserver.BaseRequestHandler, object):

2172

1478

"""A class to handle client connections.

2173

1479

2177

1483

def handle(self):

2178

1484

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

2179

1485

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

2180

str(self.client_address))

1486

unicode(self.client_address))

2181

1487

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

2182

1488

self.server.child_pipe.fileno())

2183

1489

2184

session = gnutls.ClientSession(self.request)

1490

session = (gnutls.connection

1491

.ClientSession(self.request,

1492

gnutls.connection

1493

.X509Credentials()))

1494

1495

# Note: gnutls.connection.X509Credentials is really a

1496

# generic GnuTLS certificate credentials object so long as

1497

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

1498

# here despite using OpenPGP certificates.

2185

1499

2186

1500

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

2187

1501

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

2191

1505

priority = self.server.gnutls_priority

2192

1506

if priority is None:

2193

1507

priority = "NORMAL"

2194

gnutls.priority_set_direct(session._c_object,

2195

priority.encode("utf-8"),

2196

None)

1508

(gnutls.library.functions

1509

.gnutls_priority_set_direct(session._c_object,

1510

priority, None))

2197

1511

2198

1512

# Start communication using the Mandos protocol

2199

1513

# Get protocol number

2201

1515

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

2202

1516

try:

2203

1517

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

2204

raise RuntimeError(line)

1518

raise RuntimeError

2205

1519

except (ValueError, IndexError, RuntimeError) as error:

2206

1520

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

2207

1521

return

2209

1523

# Start GnuTLS connection

2210

1524

try:

2211

1525

session.handshake()

2212

except gnutls.Error as error:

1526

except gnutls.errors.GNUTLSError as error:

2213

1527

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

2214

1528

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

2215

1529

# established. Just abandon the request.

2219

1533

approval_required = False

2220

1534

try:

2221

1535

try:

2222

fpr = self.fingerprint(

2223

self.peer_certificate(session))

2224

except (TypeError, gnutls.Error) as error:

1536

fpr = self.fingerprint(self.peer_certificate

1537

(session))

1538

except (TypeError,

1539

gnutls.errors.GNUTLSError) as error:

2225

1540

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

2226

1541

return

2227

1542

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

2232

1547

except KeyError:

2233

1548

return

2234

1549

1550

if self.server.use_dbus:

1551

# Emit D-Bus signal

1552

client.NewRequest(str(self.client_address))

1553

2235

1554

if client.approval_delay:

2236

1555

delay = client.approval_delay

2237

1556

client.approvals_pending += 1

2240

1559

while True:

2241

1560

if not client.enabled:

2242

1561

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

2243

client.name)

1562

client.name)

2244

1563

if self.server.use_dbus:

2245

1564

# Emit D-Bus signal

2246

1565

client.Rejected("Disabled")

2255

1574

if self.server.use_dbus:

2256

1575

# Emit D-Bus signal

2257

1576

client.NeedApproval(

2258

client.approval_delay.total_seconds()

2259

* 1000, client.approved_by_default)

1577

client.approval_delay_milliseconds(),

1578

client.approved_by_default)

2260

1579

else:

2261

1580

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

2262

1581

client.name)

2268

1587

#wait until timeout or approved

2269

1588

time = datetime.datetime.now()

2270

1589

client.changedstate.acquire()

2271

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

1590

(client.changedstate.wait

1591

(float(client.timedelta_to_milliseconds(delay)

1592

/ 1000)))

2272

1593

client.changedstate.release()

2273

1594

time2 = datetime.datetime.now()

2274

1595

if (time2 - time) >= delay:

2285

1606

else:

2286

1607

delay -= time2 - time

2287

1608

2288

try:

2289

session.send(client.secret)

2290

except gnutls.Error as error:

2291

logger.warning("gnutls send failed",

2292

exc_info = error)

2293

return

1609

sent_size = 0

1610

while sent_size < len(client.secret):

1611

try:

1612

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

1613

except gnutls.errors.GNUTLSError as error:

1614

logger.warning("gnutls send failed")

1615

return

1616

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

1617

sent, len(client.secret)

1618

- (sent_size + sent))

1619

sent_size += sent

2294

1620

2295

1621

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

2296

1622

# bump the timeout using extended_timeout

2297

client.bump_timeout(client.extended_timeout)

1623

client.checked_ok(client.extended_timeout)

2298

1624

if self.server.use_dbus:

2299

1625

# Emit D-Bus signal

2300

1626

client.GotSecret()

2304

1630

client.approvals_pending -= 1

2305

1631

try:

2306

1632

session.bye()

2307

except gnutls.Error as error:

2308

logger.warning("GnuTLS bye failed",

2309

exc_info=error)

1633

except gnutls.errors.GNUTLSError as error:

1634

logger.warning("GnuTLS bye failed")

2310

1635

2311

1636

@staticmethod

2312

1637

def peer_certificate(session):

2313

1638

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

2314

1639

# If not an OpenPGP certificate...

2315

if (gnutls.certificate_type_get(session._c_object)

2316

!= gnutls.CRT_OPENPGP):

2317

# ...return invalid data

2318

return b""

1640

if (gnutls.library.functions

1641

.gnutls_certificate_type_get(session._c_object)

1642

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1643

# ...do the normal thing

1644

return session.peer_certificate

2319

1645

list_size = ctypes.c_uint(1)

2320

cert_list = (gnutls.certificate_get_peers

1646

cert_list = (gnutls.library.functions

1647

.gnutls_certificate_get_peers

2321

1648

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

2322

1649

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

2323

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

1650

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

1651

" certificate")

2324

1652

if list_size.value == 0:

2325

1653

return None

2326

1654

cert = cert_list[0]

2330

1658

def fingerprint(openpgp):

2331

1659

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

2332

1660

# New GnuTLS "datum" with the OpenPGP public key

2333

datum = gnutls.datum_t(

2334

ctypes.cast(ctypes.c_char_p(openpgp),

2335

ctypes.POINTER(ctypes.c_ubyte)),

2336

ctypes.c_uint(len(openpgp)))

1661

datum = (gnutls.library.types

1662

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

1663

ctypes.POINTER

1664

(ctypes.c_ubyte)),

1665

ctypes.c_uint(len(openpgp))))

2337

1666

# New empty GnuTLS certificate

2338

crt = gnutls.openpgp_crt_t()

2339

gnutls.openpgp_crt_init(ctypes.byref(crt))

1667

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1668

(gnutls.library.functions

1669

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2340

1670

# Import the OpenPGP public key into the certificate

2341

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

2342

gnutls.OPENPGP_FMT_RAW)

1671

(gnutls.library.functions

1672

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

1673

gnutls.library.constants

1674

.GNUTLS_OPENPGP_FMT_RAW))

2343

1675

# Verify the self signature in the key

2344

1676

crtverify = ctypes.c_uint()

2345

gnutls.openpgp_crt_verify_self(crt, 0,

2346

ctypes.byref(crtverify))

1677

(gnutls.library.functions

1678

.gnutls_openpgp_crt_verify_self(crt, 0,

1679

ctypes.byref(crtverify)))

2347

1680

if crtverify.value != 0:

2348

gnutls.openpgp_crt_deinit(crt)

2349

raise gnutls.CertificateSecurityError("Verify failed")

1681

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1682

raise (gnutls.errors.CertificateSecurityError

1683

("Verify failed"))

2350

1684

# New buffer for the fingerprint

2351

1685

buf = ctypes.create_string_buffer(20)

2352

1686

buf_len = ctypes.c_size_t()

2353

1687

# Get the fingerprint from the certificate into the buffer

2354

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

2355

ctypes.byref(buf_len))

1688

(gnutls.library.functions

1689

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

1690

ctypes.byref(buf_len)))

2356

1691

# Deinit the certificate

2357

gnutls.openpgp_crt_deinit(crt)

1692

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2358

1693

# Convert the buffer to a Python bytestring

2359

1694

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

2360

1695

# Convert the bytestring to hexadecimal notation

2364

1699

2365

1700

class MultiprocessingMixIn(object):

2366

1701

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

2367

2368

1702

def sub_process_main(self, request, address):

2369

1703

try:

2370

1704

self.finish_request(request, address)

2375

1709

def process_request(self, request, address):

2376

1710

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

2377

1711

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

2378

args = (request, address))

1712

args = (request,

1713

address))

2379

1714

proc.start()

2380

1715

return proc

2381

1716

2382

1717

2383

1718

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2384

1719

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

2385

2386

1720

def process_request(self, request, client_address):

2387

1721

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

2388

1722

2397

1731

2398

1732

def add_pipe(self, parent_pipe, proc):

2399

1733

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

2400

raise NotImplementedError()

1734

raise NotImplementedError

2401

1735

2402

1736

2403

1737

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2409

1743

interface: None or a network interface name (string)

2410

1744

use_ipv6: Boolean; to use IPv6 or not

2411

1745

"""

2412

2413

1746

def __init__(self, server_address, RequestHandlerClass,

2414

interface=None,

2415

use_ipv6=True,

2416

socketfd=None):

2417

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

2418

creating a new one with socket.socket().

2419

"""

1747

interface=None, use_ipv6=True):

2420

1748

self.interface = interface

2421

1749

if use_ipv6:

2422

1750

self.address_family = socket.AF_INET6

2423

if socketfd is not None:

2424

# Save the file descriptor

2425

self.socketfd = socketfd

2426

# Save the original socket.socket() function

2427

self.socket_socket = socket.socket

2428

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

2429

#

2430

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

2431

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

2432

# patching socket.socket.)

2433

#

2434

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

2435

@functools.wraps(socket.socket)

2436

def socket_wrapper(*args, **kwargs):

2437

# Restore original function so subsequent calls are

2438

# not affected.

2439

socket.socket = self.socket_socket

2440

del self.socket_socket

2441

# This time only, return a new socket object from the

2442

# saved file descriptor.

2443

return socket.fromfd(self.socketfd, *args, **kwargs)

2444

# Replace socket.socket() function with wrapper

2445

socket.socket = socket_wrapper

2446

# The socketserver.TCPServer.__init__ will call

2447

# socket.socket(), which might be our replacement,

2448

# socket_wrapper(), if socketfd was set.

2449

1751

socketserver.TCPServer.__init__(self, server_address,

2450

1752

RequestHandlerClass)

2451

2452

1753

def server_bind(self):

2453

1754

"""This overrides the normal server_bind() function

2454

1755

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

2455

1756

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

2456

1757

if self.interface is not None:

2457

1758

if SO_BINDTODEVICE is None:

2458

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

2459

# common enough.

2460

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

2461

SO_BINDTODEVICE = 25

2462

try:

2463

self.socket.setsockopt(

2464

socket.SOL_SOCKET, SO_BINDTODEVICE,

2465

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

2466

except socket.error as error:

2467

if error.errno == errno.EPERM:

2468

logger.error("No permission to bind to"

2469

" interface %s", self.interface)

2470

elif error.errno == errno.ENOPROTOOPT:

2471

logger.error("SO_BINDTODEVICE not available;"

2472

" cannot bind to interface %s",

2473

self.interface)

2474

elif error.errno == errno.ENODEV:

2475

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

2476

" cannot bind", self.interface)

2477

else:

2478

raise

1759

logger.error("SO_BINDTODEVICE does not exist;"

1760

" cannot bind to interface %s",

1761

self.interface)

1762

else:

1763

try:

1764

self.socket.setsockopt(socket.SOL_SOCKET,

1765

SO_BINDTODEVICE,

1766

str(self.interface

1767

+ '\0'))

1768

except socket.error as error:

1769

if error[0] == errno.EPERM:

1770

logger.error("No permission to"

1771

" bind to interface %s",

1772

self.interface)

1773

elif error[0] == errno.ENOPROTOOPT:

1774

logger.error("SO_BINDTODEVICE not available;"

1775

" cannot bind to interface %s",

1776

self.interface)

1777

else:

1778

raise

2479

1779

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

2480

1780

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

2481

1781

if not self.server_address[0]:

2482

1782

if self.address_family == socket.AF_INET6:

2483

1783

any_address = "::" # in6addr_any

2484

1784

else:

2485

any_address = "0.0.0.0" # INADDR_ANY

1785

any_address = socket.INADDR_ANY

2486

1786

self.server_address = (any_address,

2487

1787

self.server_address[1])

2488

1788

elif not self.server_address[1]:

2489

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

1789

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

1790

0)

2490

1791

# if self.interface:

2491

1792

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

2492

1793

# 0, # port

2504

1805

gnutls_priority GnuTLS priority string

2505

1806

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

2506

1807

2507

Assumes a GLib.MainLoop event loop.

1808

Assumes a gobject.MainLoop event loop.

2508

1809

"""

2509

2510

1810

def __init__(self, server_address, RequestHandlerClass,

2511

interface=None,

2512

use_ipv6=True,

2513

clients=None,

2514

gnutls_priority=None,

2515

use_dbus=True,

2516

socketfd=None):

1811

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

1812

gnutls_priority=None, use_dbus=True):

2517

1813

self.enabled = False

2518

1814

self.clients = clients

2519

1815

if self.clients is None:

2523

1819

IPv6_TCPServer.__init__(self, server_address,

2524

1820

RequestHandlerClass,

2525

1821

interface = interface,

2526

use_ipv6 = use_ipv6,

2527

socketfd = socketfd)

2528

1822

use_ipv6 = use_ipv6)

2529

1823

def server_activate(self):

2530

1824

if self.enabled:

2531

1825

return socketserver.TCPServer.server_activate(self)

2535

1829

2536

1830

def add_pipe(self, parent_pipe, proc):

2537

1831

# Call "handle_ipc" for both data and EOF events

2538

GLib.io_add_watch(

2539

parent_pipe.fileno(),

2540

GLib.IO_IN | GLib.IO_HUP,

2541

functools.partial(self.handle_ipc,

2542

parent_pipe = parent_pipe,

2543

proc = proc))

1832

gobject.io_add_watch(parent_pipe.fileno(),

1833

gobject.IO_IN | gobject.IO_HUP,

1834

functools.partial(self.handle_ipc,

1835

parent_pipe =

1836

parent_pipe,

1837

proc = proc))

2544

1838

2545

def handle_ipc(self, source, condition,

2546

parent_pipe=None,

2547

proc = None,

2548

client_object=None):

1839

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

1840

proc = None, client_object=None):

1841

condition_names = {

1842

gobject.IO_IN: "IN", # There is data to read.

1843

gobject.IO_OUT: "OUT", # Data can be written (without

1844

# blocking).

1845

gobject.IO_PRI: "PRI", # There is urgent data to read.

1846

gobject.IO_ERR: "ERR", # Error condition.

1847

gobject.IO_HUP: "HUP" # Hung up (the connection has been

1848

# broken, usually for pipes and

1849

# sockets).

1850

}

1851

conditions_string = ' | '.join(name

1852

for cond, name in

1853

condition_names.iteritems()

1854

if cond & condition)

2549

1855

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

2550

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

1856

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

2551

1857

# Wait for other process to exit

2552

1858

proc.join()

2553

1859

return False

2560

1866

fpr = request[1]

2561

1867

address = request[2]

2562

1868

2563

for c in self.clients.values():

1869

for c in self.clients.itervalues():

2564

1870

if c.fingerprint == fpr:

2565

1871

client = c

2566

1872

break

2574

1880

parent_pipe.send(False)

2575

1881

return False

2576

1882

2577

GLib.io_add_watch(

2578

parent_pipe.fileno(),

2579

GLib.IO_IN | GLib.IO_HUP,

2580

functools.partial(self.handle_ipc,

2581

parent_pipe = parent_pipe,

2582

proc = proc,

2583

client_object = client))

1883

gobject.io_add_watch(parent_pipe.fileno(),

1884

gobject.IO_IN | gobject.IO_HUP,

1885

functools.partial(self.handle_ipc,

1886

parent_pipe =

1887

parent_pipe,

1888

proc = proc,

1889

client_object =

1890

client))

2584

1891

parent_pipe.send(True)

2585

1892

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

2586

1893

# same fileno

2592

1899

2593

1900

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

2594

1901

funcname)(*args,

2595

**kwargs)))

1902

**kwargs)))

2596

1903

2597

1904

if command == 'getattr':

2598

1905

attrname = request[1]

2599

if isinstance(client_object.__getattribute__(attrname),

2600

collections.Callable):

2601

parent_pipe.send(('function', ))

1906

if callable(client_object.__getattribute__(attrname)):

1907

parent_pipe.send(('function',))

2602

1908

else:

2603

parent_pipe.send((

2604

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

1909

parent_pipe.send(('data', client_object

1910

.__getattribute__(attrname)))

2605

1911

2606

1912

if command == 'setattr':

2607

1913

attrname = request[1]

2611

1917

return True

2612

1918

2613

1919

2614

def rfc3339_duration_to_delta(duration):

2615

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

2616

2617

>>> rfc3339_duration_to_delta("P7D")

2618

datetime.timedelta(7)

2619

>>> rfc3339_duration_to_delta("PT60S")

2620

datetime.timedelta(0, 60)

2621

>>> rfc3339_duration_to_delta("PT60M")

2622

datetime.timedelta(0, 3600)

2623

>>> rfc3339_duration_to_delta("PT24H")

2624

datetime.timedelta(1)

2625

>>> rfc3339_duration_to_delta("P1W")

2626

datetime.timedelta(7)

2627

>>> rfc3339_duration_to_delta("PT5M30S")

2628

datetime.timedelta(0, 330)

2629

>>> rfc3339_duration_to_delta("P1DT3M20S")

2630

datetime.timedelta(1, 200)

2631

"""

2632

2633

# Parsing an RFC 3339 duration with regular expressions is not

2634

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

2635

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

2636

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

2637

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

2638

# avoid excessive use of external libraries.

2639

2640

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

2641

Token = collections.namedtuple("Token", (

2642

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

2643

# a "group" containing digits

2644

"value", # datetime.timedelta or None

2645

"followers")) # Tokens valid after this token

2646

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

2647

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

2648

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

2649

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

2650

datetime.timedelta(seconds=1),

2651

frozenset((token_end, )))

2652

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

2653

datetime.timedelta(minutes=1),

2654

frozenset((token_second, token_end)))

2655

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

2656

datetime.timedelta(hours=1),

2657

frozenset((token_minute, token_end)))

2658

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

2659

None,

2660

frozenset((token_hour, token_minute,

2661

token_second)))

2662

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

2663

datetime.timedelta(days=1),

2664

frozenset((token_time, token_end)))

2665

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

2666

datetime.timedelta(weeks=4),

2667

frozenset((token_day, token_end)))

2668

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

2669

datetime.timedelta(weeks=52),

2670

frozenset((token_month, token_end)))

2671

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

2672

datetime.timedelta(weeks=1),

2673

frozenset((token_end, )))

2674

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

2675

frozenset((token_year, token_month,

2676

token_day, token_time,

2677

token_week)))

2678

# Define starting values

2679

value = datetime.timedelta() # Value so far

2680

found_token = None

2681

followers = frozenset((token_duration, )) # Following valid tokens

2682

s = duration # String left to parse

2683

# Loop until end token is found

2684

while found_token is not token_end:

2685

# Search for any currently valid tokens

2686

for token in followers:

2687

match = token.regexp.match(s)

2688

if match is not None:

2689

# Token found

2690

if token.value is not None:

2691

# Value found, parse digits

2692

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

2693

# Add to value so far

2694

value += factor * token.value

2695

# Strip token from string

2696

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

2697

# Go to found token

2698

found_token = token

2699

# Set valid next tokens

2700

followers = found_token.followers

2701

break

2702

else:

2703

# No currently valid tokens were found

2704

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

2705

.format(duration))

2706

# End token found

2707

return value

2708

2709

2710

1920

def string_to_delta(interval):

2711

1921

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

2712

1922

2723

1933

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

2724

1934

datetime.timedelta(0, 330)

2725

1935

"""

2726

2727

try:

2728

return rfc3339_duration_to_delta(interval)

2729

except ValueError:

2730

pass

2731

2732

1936

timevalue = datetime.timedelta(0)

2733

1937

for s in interval.split():

2734

1938

try:

2735

suffix = s[-1]

1939

suffix = unicode(s[-1])

2736

1940

value = int(s[:-1])

2737

1941

if suffix == "d":

2738

1942

delta = datetime.timedelta(value)

2745

1949

elif suffix == "w":

2746

1950

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

2747

1951

else:

2748

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

2749

except IndexError as e:

1952

raise ValueError("Unknown suffix %r" % suffix)

1953

except (ValueError, IndexError) as e:

2750

1954

raise ValueError(*(e.args))

2751

1955

timevalue += delta

2752

1956

return timevalue

2765

1969

sys.exit()

2766

1970

if not noclose:

2767

1971

# Close all standard open file descriptors

2768

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

1972

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

2769

1973

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

2770

1974

raise OSError(errno.ENODEV,

2771

"{} not a character device"

2772

.format(os.devnull))

1975

"%s not a character device"

1976

% os.path.devnull)

2773

1977

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

2774

1978

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

2775

1979

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

2784

1988

2785

1989

parser = argparse.ArgumentParser()

2786

1990

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

2787

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

1991

version = "%%(prog)s %s" % version,

2788

1992

help="show version number and exit")

2789

1993

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

2790

1994

help="Bind to interface IF")

2796

2000

help="Run self-test")

2797

2001

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

2798

2002

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

2799

" to terminal", default=None)

2003

" to terminal")

2800

2004

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

2801

2005

help="Debug level for stdout output")

2802

2006

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

2809

2013

" files")

2810

2014

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

2811

2015

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

2812

" system bus interface", default=None)

2016

" system bus interface")

2813

2017

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

2814

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

2815

default=None)

2018

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

2816

2019

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

2817

2020

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

2818

" state", default=None)

2819

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

2820

help="Specify a file descriptor to a network"

2821

" socket to use instead of creating one")

2021

" state")

2822

2022

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

2823

2023

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

2824

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

2825

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

2826

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

2827

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

2828

default=None)

2829

2024

2830

2025

options = parser.parse_args()

2831

2026

2832

2027

if options.check:

2833

2028

import doctest

2834

fail_count, test_count = doctest.testmod()

2835

sys.exit(os.EX_OK if fail_count == 0 else 1)

2029

doctest.testmod()

2030

sys.exit()

2836

2031

2837

2032

# Default values for config file for server-global settings

2838

2033

server_defaults = { "interface": "",

2840

2035

"port": "",

2841

2036

"debug": "False",

2842

2037

"priority":

2843

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

2844

":+SIGN-DSA-SHA256",

2038

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

2845

2039

"servicename": "Mandos",

2846

2040

"use_dbus": "True",

2847

2041

"use_ipv6": "True",

2848

2042

"debuglevel": "",

2849

2043

"restore": "True",

2850

"socket": "",

2851

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

2852

"foreground": "False",

2853

"zeroconf": "True",

2854

}

2044

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

2045

}

2855

2046

2856

2047

# Parse config file for server-global settings

2857

2048

server_config = configparser.SafeConfigParser(server_defaults)

2858

2049

del server_defaults

2859

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

2050

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

2051

"mandos.conf"))

2860

2052

# Convert the SafeConfigParser object to a dict

2861

2053

server_settings = server_config.defaults()

2862

2054

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

2863

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

2055

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

2864

2056

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

2865

2057

option)

2866

2058

if server_settings["port"]:

2867

2059

server_settings["port"] = server_config.getint("DEFAULT",

2868

2060

"port")

2869

if server_settings["socket"]:

2870

server_settings["socket"] = server_config.getint("DEFAULT",

2871

"socket")

2872

# Later, stdin will, and stdout and stderr might, be dup'ed

2873

# over with an opened os.devnull. But we don't want this to

2874

# happen with a supplied network socket.

2875

if 0 <= server_settings["socket"] <= 2:

2876

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

2877

["socket"])

2878

2061

del server_config

2879

2062

2880

2063

# Override the settings from the config file with command line

2881

2064

# options, if set.

2882

2065

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

2883

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

2884

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

2885

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

2066

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

2067

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

2068

"statedir"):

2886

2069

value = getattr(options, option)

2887

2070

if value is not None:

2888

2071

server_settings[option] = value

2889

2072

del options

2890

2073

# Force all strings to be unicode

2891

2074

for option in server_settings.keys():

2892

if isinstance(server_settings[option], bytes):

2893

server_settings[option] = (server_settings[option]

2894

.decode("utf-8"))

2895

# Force all boolean options to be boolean

2896

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

2897

"foreground", "zeroconf"):

2898

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

2899

# Debug implies foreground

2900

if server_settings["debug"]:

2901

server_settings["foreground"] = True

2075

if type(server_settings[option]) is str:

2076

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

2902

2077

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

2903

2078

2904

2079

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

2905

2080

2906

if (not server_settings["zeroconf"]

2907

and not (server_settings["port"]

2908

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

2909

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

2910

2911

2081

# For convenience

2912

2082

debug = server_settings["debug"]

2913

2083

debuglevel = server_settings["debuglevel"]

2915

2085

use_ipv6 = server_settings["use_ipv6"]

2916

2086

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

2917

2087

stored_state_file)

2918

foreground = server_settings["foreground"]

2919

zeroconf = server_settings["zeroconf"]

2920

2088

2921

2089

if debug:

2922

2090

initlogger(debug, logging.DEBUG)

2928

2096

initlogger(debug, level)

2929

2097

2930

2098

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

2931

syslogger.setFormatter(

2932

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

2933

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

2934

server_settings["servicename"])))

2099

syslogger.setFormatter(logging.Formatter

2100

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

2101

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

2102

% server_settings["servicename"]))

2935

2103

2936

2104

# Parse config file with clients

2937

2105

client_config = configparser.SafeConfigParser(Client

2942

2110

global mandos_dbus_service

2943

2111

mandos_dbus_service = None

2944

2112

2945

socketfd = None

2946

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

2947

socketfd = server_settings["socket"]

2948

tcp_server = MandosServer(

2949

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

2950

ClientHandler,

2951

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

2952

use_ipv6=use_ipv6,

2953

gnutls_priority=server_settings["priority"],

2954

use_dbus=use_dbus,

2955

socketfd=socketfd)

2956

if not foreground:

2957

pidfilename = "/run/mandos.pid"

2958

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

2959

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

2960

pidfile = None

2113

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

2114

server_settings["port"]),

2115

ClientHandler,

2116

interface=(server_settings["interface"]

2117

or None),

2118

use_ipv6=use_ipv6,

2119

gnutls_priority=

2120

server_settings["priority"],

2121

use_dbus=use_dbus)

2122

if not debug:

2123

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

2961

2124

try:

2962

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

2963

except IOError as e:

2964

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

2965

exc_info=e)

2125

pidfile = open(pidfilename, "w")

2126

except IOError:

2127

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

2966

2128

2967

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

2968

("mandos", "mandos"),

2969

("nobody", "nogroup")):

2129

try:

2130

uid = pwd.getpwnam("_mandos").pw_uid

2131

gid = pwd.getpwnam("_mandos").pw_gid

2132

except KeyError:

2970

2133

try:

2971

uid = pwd.getpwnam(name).pw_uid

2972

gid = pwd.getpwnam(group).pw_gid

2973

break

2134

uid = pwd.getpwnam("mandos").pw_uid

2135

gid = pwd.getpwnam("mandos").pw_gid

2974

2136

except KeyError:

2975

continue

2976

else:

2977

uid = 65534

2978

gid = 65534

2137

try:

2138

uid = pwd.getpwnam("nobody").pw_uid

2139

gid = pwd.getpwnam("nobody").pw_gid

2140

except KeyError:

2141

uid = 65534

2142

gid = 65534

2979

2143

try:

2980

2144

os.setgid(gid)

2981

2145

os.setuid(uid)

2982

if debug:

2983

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

2984

gid))

2985

2146

except OSError as error:

2986

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

2987

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

2988

if error.errno != errno.EPERM:

2989

raise

2147

if error[0] != errno.EPERM:

2148

raise error

2990

2149

2991

2150

if debug:

2992

2151

# Enable all possible GnuTLS debugging

2993

2152

2994

2153

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

2995

2154

# - GnuTLS manual

2996

gnutls.global_set_log_level(11)

2155

gnutls.library.functions.gnutls_global_set_log_level(11)

2997

2156

2998

@gnutls.log_func

2157

@gnutls.library.types.gnutls_log_func

2999

2158

def debug_gnutls(level, string):

3000

2159

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

3001

2160

3002

gnutls.global_set_log_function(debug_gnutls)

2161

(gnutls.library.functions

2162

.gnutls_global_set_log_function(debug_gnutls))

3003

2163

3004

2164

# Redirect stdin so all checkers get /dev/null

3005

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

2165

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

3006

2166

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

3007

2167

if null > 2:

3008

2168

os.close(null)

3009

2169

3010

2170

# Need to fork before connecting to D-Bus

3011

if not foreground:

2171

if not debug:

3012

2172

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

3013

2173

daemon()

3014

2174

3015

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

3016

# to inform GLib that threads will be used.

3017

GLib.threads_init()

2175

gobject.threads_init()

3018

2176

3019

2177

global main_loop

3020

2178

# From the Avahi example code

3021

DBusGMainLoop(set_as_default=True)

3022

main_loop = GLib.MainLoop()

2179

DBusGMainLoop(set_as_default=True )

2180

main_loop = gobject.MainLoop()

3023

2181

bus = dbus.SystemBus()

3024

2182

# End of Avahi example code

3025

2183

if use_dbus:

3026

2184

try:

3027

2185

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

3028

bus,

3029

do_not_queue=True)

3030

old_bus_name = dbus.service.BusName(

3031

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

3032

do_not_queue=True)

3033

except dbus.exceptions.DBusException as e:

3034

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

2186

bus, do_not_queue=True)

2187

old_bus_name = (dbus.service.BusName

2188

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

2189

do_not_queue=True))

2190

except dbus.exceptions.NameExistsException as e:

2191

logger.error(unicode(e) + ", disabling D-Bus")

3035

2192

use_dbus = False

3036

2193

server_settings["use_dbus"] = False

3037

2194

tcp_server.use_dbus = False

3038

if zeroconf:

3039

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

3040

service = AvahiServiceToSyslog(

3041

name = server_settings["servicename"],

3042

servicetype = "_mandos._tcp",

3043

protocol = protocol,

3044

bus = bus)

3045

if server_settings["interface"]:

3046

service.interface = if_nametoindex(

3047

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

2195

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2196

service = AvahiServiceToSyslog(name =

2197

server_settings["servicename"],

2198

servicetype = "_mandos._tcp",

2199

protocol = protocol, bus = bus)

2200

if server_settings["interface"]:

2201

service.interface = (if_nametoindex

2202

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

3048

2203

3049

2204

global multiprocessing_manager

3050

2205

multiprocessing_manager = multiprocessing.Manager()

3051

2206

3052

2207

client_class = Client

3053

2208

if use_dbus:

3054

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

2209

client_class = functools.partial(ClientDBusTransitional,

2210

bus = bus)

3055

2211

3056

2212

client_settings = Client.config_parser(client_config)

3057

2213

old_client_settings = {}

3058

2214

clients_data = {}

3059

2215

3060

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

3061

global wnull

3062

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

3063

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

3064

# mode

3065

if debug or not foreground:

3066

wnull.close()

3067

3068

2216

# Get client data and settings from last running state.

3069

2217

if server_settings["restore"]:

3070

2218

try:

3071

2219

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

3072

if sys.version_info.major == 2:

3073

clients_data, old_client_settings = pickle.load(

3074

stored_state)

3075

else:

3076

bytes_clients_data, bytes_old_client_settings = (

3077

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

3078

### Fix bytes to strings

3079

## clients_data

3080

# .keys()

3081

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

3082

if isinstance(key, bytes)

3083

else key): value

3084

for key, value in

3085

bytes_clients_data.items() }

3086

del bytes_clients_data

3087

for key in clients_data:

3088

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

3089

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

3090

for k, v in

3091

clients_data[key].items() }

3092

clients_data[key] = value

3093

# .client_structure

3094

value["client_structure"] = [

3095

(s.decode("utf-8")

3096

if isinstance(s, bytes)

3097

else s) for s in

3098

value["client_structure"] ]

3099

# .name & .host

3100

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

3101

if isinstance(value[k], bytes):

3102

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

3103

## old_client_settings

3104

# .keys()

3105

old_client_settings = {

3106

(key.decode("utf-8")

3107

if isinstance(key, bytes)

3108

else key): value

3109

for key, value in

3110

bytes_old_client_settings.items() }

3111

del bytes_old_client_settings

3112

# .host

3113

for value in old_client_settings.values():

3114

if isinstance(value["host"], bytes):

3115

value["host"] = (value["host"]

3116

.decode("utf-8"))

2220

clients_data, old_client_settings = (pickle.load

2221

(stored_state))

3117

2222

os.remove(stored_state_path)

3118

2223

except IOError as e:

3119

if e.errno == errno.ENOENT:

3120

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

3121

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

3122

else:

3123

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

3124

exc_info=e)

2224

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

2225

.format(e))

2226

if e.errno != errno.ENOENT:

3125

2227

raise

3126

2228

except EOFError as e:

3127

2229

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

3128

"EOFError:",

3129

exc_info=e)

2230

"EOFError: {0}".format(e))

3130

2231

3131

2232

with PGPEngine() as pgp:

3132

for client_name, client in clients_data.items():

3133

# Skip removed clients

3134

if client_name not in client_settings:

3135

continue

3136

2233

for client_name, client in clients_data.iteritems():

3137

2234

# Decide which value to use after restoring saved state.

3138

2235

# We have three different values: Old config file,

3139

2236

# new config file, and saved state.

3144

2241

# For each value in new config, check if it

3145

2242

# differs from the old config value (Except for

3146

2243

# the "secret" attribute)

3147

if (name != "secret"

3148

and (value !=

3149

old_client_settings[client_name][name])):

2244

if (name != "secret" and

2245

value != old_client_settings[client_name]

2246

[name]):

3150

2247

client[name] = value

3151

2248

except KeyError:

3152

2249

pass

3153

2250

3154

2251

# Clients who has passed its expire date can still be

3155

# enabled if its last checker was successful. A Client

3156

# whose checker succeeded before we stored its state is

3157

# assumed to have successfully run all checkers during

3158

# downtime.

2252

# enabled if its last checker was successful. Clients

2253

# whose checker failed before we stored its state is

2254

# assumed to have failed all checkers during downtime.

3159

2255

if client["enabled"]:

3160

2256

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

3161

2257

if not client["last_checked_ok"]:

3162

2258

logger.warning(

3163

"disabling client {} - Client never "

3164

"performed a successful checker".format(

3165

client_name))

2259

"disabling client {0} - Client never "

2260

"performed a successfull checker"

2261

.format(client["name"]))

3166

2262

client["enabled"] = False

3167

2263

elif client["last_checker_status"] != 0:

3168

2264

logger.warning(

3169

"disabling client {} - Client last"

3170

" checker failed with error code"

3171

" {}".format(

3172

client_name,

3173

client["last_checker_status"]))

2265

"disabling client {0} - Client "

2266

"last checker failed with error code {1}"

2267

.format(client["name"],

2268

client["last_checker_status"]))

3174

2269

client["enabled"] = False

3175

2270

else:

3176

client["expires"] = (

3177

datetime.datetime.utcnow()

3178

+ client["timeout"])

2271

client["expires"] = (datetime.datetime

2272

.utcnow()

2273

+ client["timeout"])

3179

2274

logger.debug("Last checker succeeded,"

3180

" keeping {} enabled".format(

3181

client_name))

2275

" keeping {0} enabled"

2276

.format(client["name"]))

3182

2277

try:

3183

client["secret"] = pgp.decrypt(

3184

client["encrypted_secret"],

3185

client_settings[client_name]["secret"])

2278

client["secret"] = (

2279

pgp.decrypt(client["encrypted_secret"],

2280

client_settings[client_name]

2281

["secret"]))

3186

2282

except PGPError:

3187

2283

# If decryption fails, we use secret from new settings

3188

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

3189

client_name))

3190

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

3191

["secret"])

2284

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

2285

.format(client_name))

2286

client["secret"] = (

2287

client_settings[client_name]["secret"])

2288

3192

2289

3193

2290

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

3194

2291

for client_name in (set(old_client_settings)

3197

2294

for client_name in (set(client_settings)

3198

2295

- set(old_client_settings)):

3199

2296

clients_data[client_name] = client_settings[client_name]

3200

3201

# Create all client objects

3202

for client_name, client in clients_data.items():

2297

2298

# Create clients all clients

2299

for client_name, client in clients_data.iteritems():

3203

2300

tcp_server.clients[client_name] = client_class(

3204

name = client_name,

3205

settings = client,

3206

server_settings = server_settings)

2301

name = client_name, settings = client)

3207

2302

3208

2303

if not tcp_server.clients:

3209

2304

logger.warning("No clients defined")

3210

3211

if not foreground:

3212

if pidfile is not None:

3213

pid = os.getpid()

3214

try:

3215

with pidfile:

3216

print(pid, file=pidfile)

3217

except IOError:

3218

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

3219

pidfilename, pid)

3220

del pidfile

2305

2306

if not debug:

2307

try:

2308

with pidfile:

2309

pid = os.getpid()

2310

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

2311

del pidfile

2312

except IOError:

2313

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

2314

pidfilename, pid)

2315

except NameError:

2316

# "pidfile" was never created

2317

pass

3221

2318

del pidfilename

2319

signal.signal(signal.SIGINT, signal.SIG_IGN)

3222

2320

3223

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

3224

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3225

lambda: main_loop.quit() and False)

2321

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

2322

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

3226

2323

3227

2324

if use_dbus:

3228

3229

@alternate_dbus_interfaces(

3230

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

3231

class MandosDBusService(DBusObjectWithObjectManager):

2325

class MandosDBusService(dbus.service.Object):

3232

2326

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

3233

3234

2327

def __init__(self):

3235

2328

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

3236

3237

2329

_interface = "se.recompile.Mandos"

3238

2330

3239

2331

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

3246

2338

"D-Bus signal"

3247

2339

pass

3248

2340

3249

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

3250

"true"})

3251

2341

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

3252

2342

def ClientRemoved(self, objpath, name):

3253

2343

"D-Bus signal"

3254

2344

pass

3255

2345

3256

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

3257

"true"})

3258

2346

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

3259

2347

def GetAllClients(self):

3260

2348

"D-Bus method"

3261

return dbus.Array(c.dbus_object_path for c in

3262

tcp_server.clients.values())

2349

return dbus.Array(c.dbus_object_path

2350

for c in

2351

tcp_server.clients.itervalues())

3263

2352

3264

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

3265

"true"})

3266

2353

@dbus.service.method(_interface,

3267

2354

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

3268

2355

def GetAllClientsWithProperties(self):

3269

2356

"D-Bus method"

3270

2357

return dbus.Dictionary(

3271

{ c.dbus_object_path: c.GetAll(

3272

"se.recompile.Mandos.Client")

3273

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

2358

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

2359

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

3274

2360

signature="oa{sv}")

3275

2361

3276

2362

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

3277

2363

def RemoveClient(self, object_path):

3278

2364

"D-Bus method"

3279

for c in tcp_server.clients.values():

2365

for c in tcp_server.clients.itervalues():

3280

2366

if c.dbus_object_path == object_path:

3281

2367

del tcp_server.clients[c.name]

3282

2368

c.remove_from_connection()

3283

# Don't signal the disabling

2369

# Don't signal anything except ClientRemoved

3284

2370

c.disable(quiet=True)

3285

# Emit D-Bus signal for removal

3286

self.client_removed_signal(c)

2371

# Emit D-Bus signal

2372

self.ClientRemoved(object_path, c.name)

3287

2373

return

3288

2374

raise KeyError(object_path)

3289

2375

3290

2376

del _interface

3291

3292

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3293

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

3294

def GetManagedObjects(self):

3295

"""D-Bus method"""

3296

return dbus.Dictionary(

3297

{ client.dbus_object_path:

3298

dbus.Dictionary(

3299

{ interface: client.GetAll(interface)

3300

for interface in

3301

client._get_all_interface_names()})

3302

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

3303

3304

def client_added_signal(self, client):

3305

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

3306

if use_dbus:

3307

# New standard signal

3308

self.InterfacesAdded(

3309

client.dbus_object_path,

3310

dbus.Dictionary(

3311

{ interface: client.GetAll(interface)

3312

for interface in

3313

client._get_all_interface_names()}))

3314

# Old signal

3315

self.ClientAdded(client.dbus_object_path)

3316

3317

def client_removed_signal(self, client):

3318

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

3319

if use_dbus:

3320

# New standard signal

3321

self.InterfacesRemoved(

3322

client.dbus_object_path,

3323

client._get_all_interface_names())

3324

# Old signal

3325

self.ClientRemoved(client.dbus_object_path,

3326

client.name)

3327

2377

3328

mandos_dbus_service = MandosDBusService()

2378

class MandosDBusServiceTransitional(MandosDBusService):

2379

__metaclass__ = AlternateDBusNamesMetaclass

2380

mandos_dbus_service = MandosDBusServiceTransitional()

3329

2381

3330

# Save modules to variables to exempt the modules from being

3331

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

3332

mp = multiprocessing

3333

wn = wnull

3334

2382

def cleanup():

3335

2383

"Cleanup function; run on exit"

3336

if zeroconf:

3337

service.cleanup()

2384

service.cleanup()

3338

2385

3339

mp.active_children()

3340

wn.close()

2386

multiprocessing.active_children()

3341

2387

if not (tcp_server.clients or client_settings):

3342

2388

return

3343

2389

3346

2392

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

3347

2393

clients = {}

3348

2394

with PGPEngine() as pgp:

3349

for client in tcp_server.clients.values():

2395

for client in tcp_server.clients.itervalues():

3350

2396

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

3351

2397

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

3352

2398

key)

3354

2400

3355

2401

# A list of attributes that can not be pickled

3356

2402

# + secret.

3357

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

3358

"checker", "server_settings" }

3359

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

3360

.Object):

2403

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

2404

"checker"))

2405

for name, typ in (inspect.getmembers

2406

(dbus.service.Object)):

3361

2407

exclude.add(name)

3362

2408

3363

2409

client_dict["encrypted_secret"] = (client

3370

2416

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

3371

2417

3372

2418

try:

3373

with tempfile.NamedTemporaryFile(

3374

mode='wb',

3375

suffix=".pickle",

3376

prefix='clients-',

3377

dir=os.path.dirname(stored_state_path),

3378

delete=False) as stored_state:

3379

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

3380

protocol = 2)

3381

tempname = stored_state.name

2419

tempfd, tempname = tempfile.mkstemp(suffix=".pickle",

2420

prefix="clients-",

2421

dir=os.path.dirname

2422

(stored_state_path))

2423

with os.fdopen(tempfd, "wb") as stored_state:

2424

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

3382

2425

os.rename(tempname, stored_state_path)

3383

2426

except (IOError, OSError) as e:

2427

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

2428

.format(e))

3384

2429

if not debug:

3385

2430

try:

3386

2431

os.remove(tempname)

3387

2432

except NameError:

3388

2433

pass

3389

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

3390

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

3391

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

3392

else:

3393

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

3394

exc_info=e)

3395

raise

2434

if e.errno not in set((errno.ENOENT, errno.EACCES,

2435

errno.EEXIST)):

2436

raise e

3396

2437

3397

2438

# Delete all clients, and settings from config

3398

2439

while tcp_server.clients:

3399

2440

name, client = tcp_server.clients.popitem()

3400

2441

if use_dbus:

3401

2442

client.remove_from_connection()

3402

# Don't signal the disabling

2443

# Don't signal anything except ClientRemoved

3403

2444

client.disable(quiet=True)

3404

# Emit D-Bus signal for removal

3405

2445

if use_dbus:

3406

mandos_dbus_service.client_removed_signal(client)

2446

# Emit D-Bus signal

2447

mandos_dbus_service.ClientRemoved(client

2448

.dbus_object_path,

2449

client.name)

3407

2450

client_settings.clear()

3408

2451

3409

2452

atexit.register(cleanup)

3410

2453

3411

for client in tcp_server.clients.values():

2454

for client in tcp_server.clients.itervalues():

3412

2455

if use_dbus:

3413

# Emit D-Bus signal for adding

3414

mandos_dbus_service.client_added_signal(client)

2456

# Emit D-Bus signal

2457

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3415

2458

# Need to initiate checking of clients

3416

2459

if client.enabled:

3417

2460

client.init_checker()

3420

2463

tcp_server.server_activate()

3421

2464

3422

2465

# Find out what port we got

3423

if zeroconf:

3424

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

2466

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

3425

2467

if use_ipv6:

3426

2468

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

3427

" flowinfo %d, scope_id %d",

3428

*tcp_server.socket.getsockname())

2469

" flowinfo %d, scope_id %d"

2470

% tcp_server.socket.getsockname())

3429

2471

else: # IPv4

3430

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

3431

*tcp_server.socket.getsockname())

2472

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

2473

% tcp_server.socket.getsockname())

3432

2474

3433

2475

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

3434

2476

3435

2477

try:

3436

if zeroconf:

3437

# From the Avahi example code

3438

try:

3439

service.activate()

3440

except dbus.exceptions.DBusException as error:

3441

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

3442

cleanup()

3443

sys.exit(1)

3444

# End of Avahi example code

2478

# From the Avahi example code

2479

try:

2480

service.activate()

2481

except dbus.exceptions.DBusException as error:

2482

logger.critical("DBusException: %s", error)

2483

cleanup()

2484

sys.exit(1)

2485

# End of Avahi example code

3445

2486

3446

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

3447

lambda *args, **kwargs:

3448

(tcp_server.handle_request

3449

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

2487

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

2488

lambda *args, **kwargs:

2489

(tcp_server.handle_request

2490

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

3450

2491

3451

2492

logger.debug("Starting main loop")

3452

2493

main_loop.run()

3453

2494

except AvahiError as error:

3454

logger.critical("Avahi Error", exc_info=error)

2495

logger.critical("AvahiError: %s", error)

3455

2496

cleanup()

3456

2497

sys.exit(1)

3457

2498

except KeyboardInterrupt:

3462

2503

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

3463

2504

cleanup()

3464

2505

3465

3466

2506

if __name__ == '__main__':

3467

2507

main()