/mandos/trunk : revision 237.4.80

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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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from future_builtins import *

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try:

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from future_builtins import *

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except ImportError:

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pass

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import SocketServer as socketserver

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try:

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import SocketServer as socketserver

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except ImportError:

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import socketserver

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import socket

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import argparse

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import datetime

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import errno

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import gnutls.crypto

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import gnutls.connection

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import gnutls.errors

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import gnutls.library.functions

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import gnutls.library.constants

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import gnutls.library.types

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import ConfigParser as configparser

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try:

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import ConfigParser as configparser

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except ImportError:

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import configparser

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import sys

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import re

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import os

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import struct

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import fcntl

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import functools

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import cPickle as pickle

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try:

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import cPickle as pickle

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except ImportError:

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import pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import collections

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import codecs

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import dbus

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import dbus.service

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import gobject

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import avahi

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from gi.repository import GLib

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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import ctypes.util

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import xml.dom.minidom

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import inspect

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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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SO_BINDTODEVICE = None

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version = "1.5.3"

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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 = "1.7.10"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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syslogger = None

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try:

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.if_nametoindex)

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if_nametoindex = ctypes.cdll.LoadLibrary(

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

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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interface))

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

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ifreq[16:20])[0]

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

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

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return interface_index

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def copy_function(func):

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

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if sys.version_info.major == 2:

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return types.FunctionType(func.func_code,

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func.func_globals,

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func.func_name,

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func.func_defaults,

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func.func_closure)

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else:

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return types.FunctionType(func.__code__,

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func.__globals__,

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func.__name__,

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func.__defaults__,

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func.__closure__)

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

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"""init logger and add loglevel"""

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global syslogger

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syslogger = (logging.handlers.SysLogHandler(

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facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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address = "/dev/log"))

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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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.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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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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def __enter__(self):

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return self

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

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

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self._cleanup()

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return False

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def password_encode(self, password):

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

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

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

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

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if len(encoded) > 2048:

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

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

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

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

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return encoded

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def encrypt(self, data, password):

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

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with open(os.devnull, "w") 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()

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proc.wait()

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except IOError as e:

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raise PGPError(e)

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self.gnupg.passphrase = None

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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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return ciphertext

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256

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def decrypt(self, data, password):

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

198

with open(os.devnull, "w") as devnull:

199

try:

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

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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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decrypted_plaintext = f.read()

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proc.wait()

208

except IOError as e:

209

raise PGPError(e)

210

self.gnupg.passphrase = None

258

passphrase = self.password_encode(password)

259

with tempfile.NamedTemporaryFile(

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dir = self.tempdir) as passfile:

261

passfile.write(passphrase)

262

passfile.flush()

263

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

270

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

271

if proc.returncode != 0:

272

raise PGPError(err)

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return decrypted_plaintext

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274

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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.

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

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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 = "/"

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def string_array_to_txt_array(self, t):

288

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

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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

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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

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SERVER_FAILURE = 4 # avahi-common/defs.h

298

avahi = Avahi()

213

299

214

300

class AvahiError(Exception):

215

301

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

216

302

self.value = value

217

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

218

def __unicode__(self):

219

return unicode(repr(self.value))

303

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

304

**kwargs)

305

220

306

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class AvahiServiceError(AvahiError):

222

308

pass

223

309

310

224

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class AvahiGroupError(AvahiError):

225

312

pass

226

313

233

320

Used to optionally bind to the specified interface.

234

321

name: string; Example: 'Mandos'

235

322

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

236

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

323

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

237

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port: integer; what port to announce

238

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TXT: list of strings; TXT record for the service

239

326

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

246

333

bus: dbus.SystemBus()

247

334

"""

248

335

249

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

250

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

251

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

252

protocol = avahi.PROTO_UNSPEC, bus = None):

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):

253

347

self.interface = interface

254

348

self.name = name

255

349

self.type = servicetype

265

359

self.bus = bus

266

360

self.entry_group_state_changed_match = None

267

361

268

def rename(self):

362

def rename(self, remove=True):

269

363

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

270

364

if self.rename_count >= self.max_renames:

271

365

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

272

366

" after %i retries, exiting.",

273

367

self.rename_count)

274

368

raise AvahiServiceError("Too many renames")

275

self.name = unicode(self.server

276

.GetAlternativeServiceName(self.name))

369

self.name = str(

370

self.server.GetAlternativeServiceName(self.name))

371

self.rename_count += 1

277

372

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

278

373

self.name)

279

self.remove()

374

if remove:

375

self.remove()

280

376

try:

281

377

self.add()

282

378

except dbus.exceptions.DBusException as error:

283

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

284

self.cleanup()

285

os._exit(1)

286

self.rename_count += 1

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)

287

387

288

388

def remove(self):

289

389

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

327

427

self.rename()

328

428

elif state == avahi.ENTRY_GROUP_FAILURE:

329

429

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

330

unicode(error))

331

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

332

.format(error))

430

str(error))

431

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

333

432

334

433

def cleanup(self):

335

434

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

345

444

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

346

445

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

347

446

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

348

bad_states = { avahi.SERVER_INVALID:

349

"Zeroconf server invalid",

350

avahi.SERVER_REGISTERING: None,

351

avahi.SERVER_COLLISION:

352

"Zeroconf server name collision",

353

avahi.SERVER_FAILURE:

354

"Zeroconf server failure" }

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

}

355

453

if state in bad_states:

356

454

if bad_states[state] is not None:

357

455

if error is None:

360

458

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

361

459

self.cleanup()

362

460

elif state == avahi.SERVER_RUNNING:

363

self.add()

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)

364

473

else:

365

474

if error is None:

366

475

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

376

485

follow_name_owner_changes=True),

377

486

avahi.DBUS_INTERFACE_SERVER)

378

487

self.server.connect_to_signal("StateChanged",

379

self.server_state_changed)

488

self.server_state_changed)

380

489

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

381

490

491

382

492

class AvahiServiceToSyslog(AvahiService):

383

def rename(self):

493

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

384

494

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

385

ret = AvahiService.rename(self)

386

syslogger.setFormatter(logging.Formatter

387

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

388

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

389

.format(self.name)))

495

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

496

syslogger.setFormatter(logging.Formatter(

497

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

498

.format(self.name)))

390

499

return ret

391

500

392

def timedelta_to_milliseconds(td):

393

"Convert a datetime.timedelta() to milliseconds"

394

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

395

+ (td.seconds * 1000)

396

+ (td.microseconds // 1000))

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()

397

765

398

766

class Client(object):

399

767

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

405

773

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

406

774

to see if the client lives.

407

775

'None' if no process is running.

408

checker_callback_tag: a gobject event source tag, or None

776

checker_callback_tag: a GLib event source tag, or None

409

777

checker_command: string; External command which is run to check

410

778

if client lives. %() expansions are done at

411

779

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

412

780

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

413

checker_initiator_tag: a gobject event source tag, or None

781

checker_initiator_tag: a GLib event source tag, or None

414

782

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

415

783

client_structure: Object describing what attributes a client has

416

784

and is used for storing the client at exit

417

785

current_checker_command: string; current running checker_command

418

disable_initiator_tag: a gobject event source tag, or None

786

disable_initiator_tag: a GLib event source tag, or None

419

787

enabled: bool()

420

788

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

421

789

uniquely identify the client

426

794

last_checker_status: integer between 0 and 255 reflecting exit

427

795

status of last checker. -1 reflects crashed

428

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

429

799

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

430

800

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

431

801

D-Bus identifiers

436

806

runtime_expansions: Allowed attributes for runtime expansion.

437

807

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

438

808

disabled, or None

809

server_settings: The server_settings dict from main()

439

810

"""

440

811

441

812

runtime_expansions = ("approval_delay", "approval_duration",

442

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

443

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

813

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

814

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

815

"last_approval_request", "last_checked_ok",

444

816

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

445

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

446

"extended_timeout": "15m",

447

"interval": "2m",

448

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

449

"host": "",

450

"approval_delay": "0s",

451

"approval_duration": "1s",

452

"approved_by_default": "True",

453

"enabled": "True",

454

}

455

456

def timeout_milliseconds(self):

457

"Return the 'timeout' attribute in milliseconds"

458

return timedelta_to_milliseconds(self.timeout)

459

460

def extended_timeout_milliseconds(self):

461

"Return the 'extended_timeout' attribute in milliseconds"

462

return timedelta_to_milliseconds(self.extended_timeout)

463

464

def interval_milliseconds(self):

465

"Return the 'interval' attribute in milliseconds"

466

return timedelta_to_milliseconds(self.interval)

467

468

def approval_delay_milliseconds(self):

469

return timedelta_to_milliseconds(self.approval_delay)

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

}

470

828

471

829

@staticmethod

472

830

def config_parser(config):

488

846

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

489

847

"enabled")

490

848

849

# Uppercase and remove spaces from fingerprint for later

850

# comparison purposes with return value from the

851

# fingerprint() function

491

852

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

492

853

.replace(" ", ""))

493

854

if "secret" in section:

494

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

855

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

856

.encode("utf-8"),

857

"base64")

495

858

elif "secfile" in section:

496

859

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

497

860

(section["secfile"])),

498

861

"rb") as secfile:

499

862

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

500

863

else:

501

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

864

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

502

865

.format(section))

503

866

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

504

867

client["extended_timeout"] = string_to_delta(

515

878

516

879

return settings

517

880

518

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

881

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

519

882

self.name = name

883

if server_settings is None:

884

server_settings = {}

885

self.server_settings = server_settings

520

886

# adding all client settings

521

for setting, value in settings.iteritems():

887

for setting, value in settings.items():

522

888

setattr(self, setting, value)

523

889

524

890

if self.enabled:

532

898

self.expires = None

533

899

534

900

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

535

# Uppercase and remove spaces from fingerprint for later

536

# comparison purposes with return value from the fingerprint()

537

# function

538

901

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

539

902

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

540

903

datetime.datetime.utcnow())

547

910

self.current_checker_command = None

548

911

self.approved = None

549

912

self.approvals_pending = 0

550

self.changedstate = (multiprocessing_manager

551

.Condition(multiprocessing_manager

552

.Lock()))

553

self.client_structure = [attr for attr in

554

self.__dict__.iterkeys()

913

self.changedstate = multiprocessing_manager.Condition(

914

multiprocessing_manager.Lock())

915

self.client_structure = [attr

916

for attr in self.__dict__.keys()

555

917

if not attr.startswith("_")]

556

918

self.client_structure.append("client_structure")

557

919

558

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

559

lambda obj:

560

isinstance(obj,

561

property)):

920

for name, t in inspect.getmembers(

921

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

562

922

if not name.startswith("_"):

563

923

self.client_structure.append(name)

564

924

585

945

if not quiet:

586

946

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

587

947

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

588

gobject.source_remove(self.disable_initiator_tag)

948

GLib.source_remove(self.disable_initiator_tag)

589

949

self.disable_initiator_tag = None

590

950

self.expires = None

591

951

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

592

gobject.source_remove(self.checker_initiator_tag)

952

GLib.source_remove(self.checker_initiator_tag)

593

953

self.checker_initiator_tag = None

594

954

self.stop_checker()

595

955

self.enabled = False

596

956

if not quiet:

597

957

self.send_changedstate()

598

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

958

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

599

959

return False

600

960

601

961

def __del__(self):

605

965

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

606

966

# and every interval from then on.

607

967

if self.checker_initiator_tag is not None:

608

gobject.source_remove(self.checker_initiator_tag)

609

self.checker_initiator_tag = (gobject.timeout_add

610

(self.interval_milliseconds(),

611

self.start_checker))

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)

612

972

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

613

973

if self.disable_initiator_tag is not None:

614

gobject.source_remove(self.disable_initiator_tag)

615

self.disable_initiator_tag = (gobject.timeout_add

616

(self.timeout_milliseconds(),

617

self.disable))

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)

618

977

# Also start a new checker *right now*.

619

978

self.start_checker()

620

979

621

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

980

def checker_callback(self, source, condition, connection,

981

command):

622

982

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

623

983

self.checker_callback_tag = None

624

984

self.checker = None

625

if os.WIFEXITED(condition):

626

self.last_checker_status = os.WEXITSTATUS(condition)

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

627

992

if self.last_checker_status == 0:

628

993

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

629

994

vars(self))

630

995

self.checked_ok()

631

996

else:

632

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

633

vars(self))

997

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

634

998

else:

635

999

self.last_checker_status = -1

1000

self.last_checker_signal = -returncode

636

1001

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

637

1002

vars(self))

1003

return False

638

1004

639

1005

def checked_ok(self):

640

1006

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

641

1007

self.last_checked_ok = datetime.datetime.utcnow()

642

1008

self.last_checker_status = 0

1009

self.last_checker_signal = None

643

1010

self.bump_timeout()

644

1011

645

1012

def bump_timeout(self, timeout=None):

647

1014

if timeout is None:

648

1015

timeout = self.timeout

649

1016

if self.disable_initiator_tag is not None:

650

gobject.source_remove(self.disable_initiator_tag)

1017

GLib.source_remove(self.disable_initiator_tag)

651

1018

self.disable_initiator_tag = None

652

1019

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

653

self.disable_initiator_tag = (gobject.timeout_add

654

(timedelta_to_milliseconds

655

(timeout), self.disable))

1020

self.disable_initiator_tag = GLib.timeout_add(

1021

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

656

1022

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

657

1023

658

1024

def need_approval(self):

672

1038

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

673

1039

# should be.

674

1040

675

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

676

try:

677

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

678

except (AttributeError, OSError) as error:

679

if (isinstance(error, OSError)

680

and error.errno != errno.ECHILD):

681

raise error

682

else:

683

if pid:

684

logger.warning("Checker was a zombie")

685

gobject.source_remove(self.checker_callback_tag)

686

self.checker_callback(pid, status,

687

self.current_checker_command)

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

688

1045

# Start a new checker if needed

689

1046

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 }

690

1051

try:

691

# In case checker_command has exactly one % operator

692

command = self.checker_command % self.host

693

except TypeError:

694

# Escape attributes for the shell

695

escaped_attrs = dict(

696

(attr,

697

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

698

errors=

699

'replace')))

700

for attr in

701

self.runtime_expansions)

702

703

try:

704

command = self.checker_command % escaped_attrs

705

except TypeError as error:

706

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

707

self.checker_command, exc_info=error)

708

return True # Try again later

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

709

1058

self.current_checker_command = command

710

try:

711

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

712

command, self.name)

713

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

714

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

715

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

716

# always replaced by /dev/null.)

717

self.checker = subprocess.Popen(command,

718

close_fds=True,

719

shell=True, cwd="/")

720

self.checker_callback_tag = (gobject.child_watch_add

721

(self.checker.pid,

722

self.checker_callback,

723

data=command))

724

# The checker may have completed before the gobject

725

# watch was added. Check for this.

726

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

727

if pid:

728

gobject.source_remove(self.checker_callback_tag)

729

self.checker_callback(pid, status, command)

730

except OSError as error:

731

logger.error("Failed to start subprocess",

732

exc_info=error)

733

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

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

734

1085

return True

735

1086

736

1087

def stop_checker(self):

737

1088

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

738

1089

if self.checker_callback_tag:

739

gobject.source_remove(self.checker_callback_tag)

1090

GLib.source_remove(self.checker_callback_tag)

740

1091

self.checker_callback_tag = None

741

1092

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

742

1093

return

743

1094

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

744

try:

745

self.checker.terminate()

746

#time.sleep(0.5)

747

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

748

# self.checker.kill()

749

except OSError as error:

750

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

751

raise

1095

self.checker.terminate()

752

1096

self.checker = None

753

1097

754

1098

755

def dbus_service_property(dbus_interface, signature="v",

756

access="readwrite", byte_arrays=False):

1099

def dbus_service_property(dbus_interface,

1100

signature="v",

1101

access="readwrite",

1102

byte_arrays=False):

757

1103

"""Decorators for marking methods of a DBusObjectWithProperties to

758

1104

become properties on the D-Bus.

759

1105

768

1114

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

769

1115

if byte_arrays and signature != "ay":

770

1116

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

771

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

1117

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

1118

772

1119

def decorator(func):

773

1120

func._dbus_is_property = True

774

1121

func._dbus_interface = dbus_interface

779

1126

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

780

1127

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

781

1128

return func

1129

782

1130

return decorator

783

1131

784

1132

793

1141

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

794

1142

"false"}

795

1143

"""

1144

796

1145

def decorator(func):

797

1146

func._dbus_is_interface = True

798

1147

func._dbus_interface = dbus_interface

799

1148

func._dbus_name = dbus_interface

800

1149

return func

1150

801

1151

return decorator

802

1152

803

1153

805

1155

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

806

1156

Usage:

807

1157

1158

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

1159

"org.freedesktop.DBus.Property."

1160

"EmitsChangedSignal": "false"})

808

1161

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

809

1162

access="r")

810

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

811

"org.freedesktop.DBus.Property."

812

"EmitsChangedSignal": "false"})

813

1163

def Property_dbus_property(self):

814

1164

return dbus.Boolean(False)

1165

1166

See also the DBusObjectWithAnnotations class.

815

1167

"""

1168

816

1169

def decorator(func):

817

1170

func._dbus_annotations = annotations

818

1171

return func

1172

819

1173

return decorator

820

1174

821

1175

822

1176

class DBusPropertyException(dbus.exceptions.DBusException):

823

1177

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

824

1178

"""

825

def __unicode__(self):

826

return unicode(str(self))

1179

pass

827

1180

828

1181

829

1182

class DBusPropertyAccessException(DBusPropertyException):

838

1191

pass

839

1192

840

1193

841

class DBusObjectWithProperties(dbus.service.Object):

842

"""A D-Bus object with properties.

1194

class DBusObjectWithAnnotations(dbus.service.Object):

1195

"""A D-Bus object with annotations.

843

1196

844

Classes inheriting from this can use the dbus_service_property

845

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

846

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

1197

Classes inheriting from this can use the dbus_annotations

1198

decorator to add annotations to methods or signals.

847

1199

"""

848

1200

849

1201

@staticmethod

853

1205

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

854

1206

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

855

1207

"""

856

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

1208

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

857

1209

False)

858

1210

859

1211

def _get_all_dbus_things(self, thing):

860

1212

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

861

1213

"""

862

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

863

name),

1214

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

864

1215

athing.__get__(self))

865

1216

for cls in self.__class__.__mro__

866

1217

for name, athing in

867

inspect.getmembers(cls,

868

self._is_dbus_thing(thing)))

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):

1284

"""A D-Bus object with properties.

1285

1286

Classes inheriting from this can use the dbus_service_property

1287

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

1288

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

1289

"""

869

1290

870

1291

def _get_dbus_property(self, interface_name, property_name):

871

1292

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

872

1293

property with the specified name and interface.

873

1294

"""

874

for cls in self.__class__.__mro__:

875

for name, value in (inspect.getmembers

876

(cls,

877

self._is_dbus_thing("property"))):

1295

for cls in self.__class__.__mro__:

1296

for name, value in inspect.getmembers(

1297

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

878

1298

if (value._dbus_name == property_name

879

1299

and value._dbus_interface == interface_name):

880

1300

return value.__get__(self)

881

1301

882

1302

# No such property

883

raise DBusPropertyNotFound(self.dbus_object_path + ":"

884

+ interface_name + "."

885

+ property_name)

886

887

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

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",

888

1317

out_signature="v")

889

1318

def Get(self, interface_name, property_name):

890

1319

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

908

1337

# The byte_arrays option is not supported yet on

909

1338

# signatures other than "ay".

910

1339

if prop._dbus_signature != "ay":

911

raise ValueError

1340

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

1341

"'ay' signature {!r}"

1342

.format(prop._dbus_signature))

912

1343

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

913

1344

for byte in value))

914

1345

prop(value)

915

1346

916

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

1347

@dbus.service.method(dbus.PROPERTIES_IFACE,

1348

in_signature="s",

917

1349

out_signature="a{sv}")

918

1350

def GetAll(self, interface_name):

919

1351

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

934

1366

if not hasattr(value, "variant_level"):

935

1367

properties[name] = value

936

1368

continue

937

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

938

value.variant_level+1)

1369

properties[name] = type(value)(

1370

value, variant_level = value.variant_level + 1)

939

1371

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

940

1372

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

941

1381

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

942

1382

out_signature="s",

943

1383

path_keyword='object_path',

947

1387

948

1388

Inserts property tags and interface annotation tags.

949

1389

"""

950

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

951

connection)

1390

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1391

object_path,

1392

connection)

952

1393

try:

953

1394

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

1395

954

1396

def make_tag(document, name, prop):

955

1397

e = document.createElement("property")

956

1398

e.setAttribute("name", name)

957

1399

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

958

1400

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

959

1401

return e

1402

960

1403

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

961

1404

# Add property tags

962

1405

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

965

1408

if prop._dbus_interface

966

1409

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

967

1410

if_tag.appendChild(tag)

968

# Add annotation tags

969

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

970

for tag in if_tag.getElementsByTagName(typ):

971

annots = dict()

972

for name, prop in (self.

973

_get_all_dbus_things(typ)):

974

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

975

and prop._dbus_interface

976

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

977

annots.update(getattr

978

(prop,

979

"_dbus_annotations",

980

{}))

981

for name, value in annots.iteritems():

982

ann_tag = document.createElement(

983

"annotation")

984

ann_tag.setAttribute("name", name)

985

ann_tag.setAttribute("value", value)

986

tag.appendChild(ann_tag)

987

# Add interface annotation tags

988

for annotation, value in dict(

989

itertools.chain.from_iterable(

990

annotations().iteritems()

991

for name, annotations in

992

self._get_all_dbus_things("interface")

993

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

994

)).iteritems():

995

ann_tag = document.createElement("annotation")

996

ann_tag.setAttribute("name", annotation)

997

ann_tag.setAttribute("value", value)

998

if_tag.appendChild(ann_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)

999

1427

# Add the names to the return values for the

1000

1428

# "org.freedesktop.DBus.Properties" methods

1001

1429

if (if_tag.getAttribute("name")

1019

1447

exc_info=error)

1020

1448

return xmlstring

1021

1449

1022

1023

def datetime_to_dbus (dt, variant_level=0):

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):

1024

1520

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

1025

1521

if dt is None:

1026

1522

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

1027

return dbus.String(dt.isoformat(),

1028

variant_level=variant_level)

1523

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

1029

1524

1030

1525

1031

1526

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1034

1529

interface names according to the "alt_interface_names" mapping.

1035

1530

Usage:

1036

1531

1037

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

1038

"net.example.AlternateInterface"})

1532

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

1533

"net.example.AlternateInterface"})

1039

1534

class SampleDBusObject(dbus.service.Object):

1040

1535

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

1041

1536

def SampleDBusMethod():

1051

1546

(from DBusObjectWithProperties) and interfaces (from the

1052

1547

dbus_interface_annotations decorator).

1053

1548

"""

1549

1054

1550

def wrapper(cls):

1055

1551

for orig_interface_name, alt_interface_name in (

1056

alt_interface_names.iteritems()):

1552

alt_interface_names.items()):

1057

1553

attr = {}

1058

1554

interface_names = set()

1059

1555

# Go though all attributes of the class

1061

1557

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

1062

1558

# with the wrong interface name

1063

1559

if (not hasattr(attribute, "_dbus_interface")

1064

or not attribute._dbus_interface

1065

.startswith(orig_interface_name)):

1560

or not attribute._dbus_interface.startswith(

1561

orig_interface_name)):

1066

1562

continue

1067

1563

# Create an alternate D-Bus interface name based on

1068

1564

# the current name

1069

alt_interface = (attribute._dbus_interface

1070

.replace(orig_interface_name,

1071

alt_interface_name))

1565

alt_interface = attribute._dbus_interface.replace(

1566

orig_interface_name, alt_interface_name)

1072

1567

interface_names.add(alt_interface)

1073

1568

# Is this a D-Bus signal?

1074

1569

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

1075

# Extract the original non-method function by

1076

# black magic

1077

nonmethod_func = (dict(

1570

# Extract the original non-method undecorated

1571

# function by black magic

1572

if sys.version_info.major == 2:

1573

nonmethod_func = (dict(

1078

1574

zip(attribute.func_code.co_freevars,

1079

attribute.__closure__))["func"]

1080

.cell_contents)

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)

1081

1582

# Create a new, but exactly alike, function

1082

1583

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

1083

1584

# with the alternate D-Bus interface name

1084

new_function = (dbus.service.signal

1085

(alt_interface,

1086

attribute._dbus_signature)

1087

(types.FunctionType(

1088

nonmethod_func.func_code,

1089

nonmethod_func.func_globals,

1090

nonmethod_func.func_name,

1091

nonmethod_func.func_defaults,

1092

nonmethod_func.func_closure)))

1585

new_function = copy_function(nonmethod_func)

1586

new_function = (dbus.service.signal(

1587

alt_interface,

1588

attribute._dbus_signature)(new_function))

1093

1589

# Copy annotations, if any

1094

1590

try:

1095

new_function._dbus_annotations = (

1096

dict(attribute._dbus_annotations))

1591

new_function._dbus_annotations = dict(

1592

attribute._dbus_annotations)

1097

1593

except AttributeError:

1098

1594

pass

1099

1595

# Define a creator of a function to call both the

1104

1600

"""This function is a scope container to pass

1105

1601

func1 and func2 to the "call_both" function

1106

1602

outside of its arguments"""

1603

1604

@functools.wraps(func2)

1107

1605

def call_both(*args, **kwargs):

1108

1606

"""This function will emit two D-Bus

1109

1607

signals by calling func1 and func2"""

1110

1608

func1(*args, **kwargs)

1111

1609

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

1112

1615

return call_both

1113

1616

# Create the "call_both" function and add it to

1114

1617

# the class

1119

1622

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

1120

1623

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

1121

1624

# to the class.

1122

attr[attrname] = (dbus.service.method

1123

(alt_interface,

1124

attribute._dbus_in_signature,

1125

attribute._dbus_out_signature)

1126

(types.FunctionType

1127

(attribute.func_code,

1128

attribute.func_globals,

1129

attribute.func_name,

1130

attribute.func_defaults,

1131

attribute.func_closure)))

1625

attr[attrname] = (

1626

dbus.service.method(

1627

alt_interface,

1628

attribute._dbus_in_signature,

1629

attribute._dbus_out_signature)

1630

(copy_function(attribute)))

1132

1631

# Copy annotations, if any

1133

1632

try:

1134

attr[attrname]._dbus_annotations = (

1135

dict(attribute._dbus_annotations))

1633

attr[attrname]._dbus_annotations = dict(

1634

attribute._dbus_annotations)

1136

1635

except AttributeError:

1137

1636

pass

1138

1637

# Is this a D-Bus property?

1141

1640

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

1142

1641

# property with the alternate D-Bus interface

1143

1642

# name. Add it to the class.

1144

attr[attrname] = (dbus_service_property

1145

(alt_interface,

1146

attribute._dbus_signature,

1147

attribute._dbus_access,

1148

attribute

1149

._dbus_get_args_options

1150

["byte_arrays"])

1151

(types.FunctionType

1152

(attribute.func_code,

1153

attribute.func_globals,

1154

attribute.func_name,

1155

attribute.func_defaults,

1156

attribute.func_closure)))

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)))

1157

1649

# Copy annotations, if any

1158

1650

try:

1159

attr[attrname]._dbus_annotations = (

1160

dict(attribute._dbus_annotations))

1651

attr[attrname]._dbus_annotations = dict(

1652

attribute._dbus_annotations)

1161

1653

except AttributeError:

1162

1654

pass

1163

1655

# Is this a D-Bus interface?

1166

1658

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

1167

1659

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

1168

1660

# to the class.

1169

attr[attrname] = (dbus_interface_annotations

1170

(alt_interface)

1171

(types.FunctionType

1172

(attribute.func_code,

1173

attribute.func_globals,

1174

attribute.func_name,

1175

attribute.func_defaults,

1176

attribute.func_closure)))

1661

attr[attrname] = (

1662

dbus_interface_annotations(alt_interface)

1663

(copy_function(attribute)))

1177

1664

if deprecate:

1178

1665

# Deprecate all alternate interfaces

1179

iname="_AlternateDBusNames_interface_annotation{0}"

1666

iname="_AlternateDBusNames_interface_annotation{}"

1180

1667

for interface_name in interface_names:

1668

1181

1669

@dbus_interface_annotations(interface_name)

1182

1670

def func(self):

1183

1671

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

1184

"true" }

1672

"true" }

1185

1673

# Find an unused name

1186

1674

for aname in (iname.format(i)

1187

1675

for i in itertools.count()):

1191

1679

if interface_names:

1192

1680

# Replace the class with a new subclass of it with

1193

1681

# methods, signals, etc. as created above.

1194

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

1195

(cls,), attr)

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)

1196

1688

return cls

1689

1197

1690

return wrapper

1198

1691

1199

1692

1200

1693

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

1201

"se.bsnet.fukt.Mandos"})

1694

"se.bsnet.fukt.Mandos"})

1202

1695

class ClientDBus(Client, DBusObjectWithProperties):

1203

1696

"""A Client class using D-Bus

1204

1697

1208

1701

"""

1209

1702

1210

1703

runtime_expansions = (Client.runtime_expansions

1211

+ ("dbus_object_path",))

1704

+ ("dbus_object_path", ))

1705

1706

_interface = "se.recompile.Mandos.Client"

1212

1707

1213

1708

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

1214

1709

1217

1712

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

1218

1713

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

1219

1714

# the D-Bus

1220

client_object_name = unicode(self.name).translate(

1715

client_object_name = str(self.name).translate(

1221

1716

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

1222

1717

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

1223

self.dbus_object_path = (dbus.ObjectPath

1224

("/clients/" + client_object_name))

1718

self.dbus_object_path = dbus.ObjectPath(

1719

"/clients/" + client_object_name)

1225

1720

DBusObjectWithProperties.__init__(self, self.bus,

1226

1721

self.dbus_object_path)

1227

1722

1228

def notifychangeproperty(transform_func,

1229

dbus_name, type_func=lambda x: x,

1230

variant_level=1):

1723

def notifychangeproperty(transform_func, dbus_name,

1724

type_func=lambda x: x,

1725

variant_level=1,

1726

invalidate_only=False,

1727

_interface=_interface):

1231

1728

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

1232

1729

its changes to DBus.

1233

1730

1238

1735

to the D-Bus. Default: no transform

1239

1736

variant_level: D-Bus variant level. Default: 1

1240

1737

"""

1241

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

1738

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

1739

1242

1740

def setter(self, value):

1243

1741

if hasattr(self, "dbus_object_path"):

1244

1742

if (not hasattr(self, attrname) or

1245

1743

type_func(getattr(self, attrname, None))

1246

1744

!= type_func(value)):

1247

dbus_value = transform_func(type_func(value),

1248

variant_level

1249

=variant_level)

1250

self.PropertyChanged(dbus.String(dbus_name),

1251

dbus_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())

1252

1760

setattr(self, attrname, value)

1253

1761

1254

1762

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

1260

1768

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

1261

1769

last_enabled = notifychangeproperty(datetime_to_dbus,

1262

1770

"LastEnabled")

1263

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

1264

type_func = lambda checker:

1265

checker is not None)

1771

checker = notifychangeproperty(

1772

dbus.Boolean, "CheckerRunning",

1773

type_func = lambda checker: checker is not None)

1266

1774

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1267

1775

"LastCheckedOK")

1268

1776

last_checker_status = notifychangeproperty(dbus.Int16,

1271

1779

datetime_to_dbus, "LastApprovalRequest")

1272

1780

approved_by_default = notifychangeproperty(dbus.Boolean,

1273

1781

"ApprovedByDefault")

1274

approval_delay = notifychangeproperty(dbus.UInt64,

1275

"ApprovalDelay",

1276

type_func =

1277

timedelta_to_milliseconds)

1782

approval_delay = notifychangeproperty(

1783

dbus.UInt64, "ApprovalDelay",

1784

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

1278

1785

approval_duration = notifychangeproperty(

1279

1786

dbus.UInt64, "ApprovalDuration",

1280

type_func = timedelta_to_milliseconds)

1787

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

1281

1788

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

1282

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

1283

type_func =

1284

timedelta_to_milliseconds)

1789

timeout = notifychangeproperty(

1790

dbus.UInt64, "Timeout",

1791

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

1285

1792

extended_timeout = notifychangeproperty(

1286

1793

dbus.UInt64, "ExtendedTimeout",

1287

type_func = timedelta_to_milliseconds)

1288

interval = notifychangeproperty(dbus.UInt64,

1289

"Interval",

1290

type_func =

1291

timedelta_to_milliseconds)

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)

1292

1798

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

1799

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

1800

invalidate_only=True)

1293

1801

1294

1802

del notifychangeproperty

1295

1803

1302

1810

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

1303

1811

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

1304

1812

1305

def checker_callback(self, pid, condition, command,

1306

*args, **kwargs):

1307

self.checker_callback_tag = None

1308

self.checker = None

1309

if os.WIFEXITED(condition):

1310

exitstatus = os.WEXITSTATUS(condition)

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:

1311

1820

# Emit D-Bus signal

1312

1821

self.CheckerCompleted(dbus.Int16(exitstatus),

1313

dbus.Int64(condition),

1822

# This is specific to GNU libC

1823

dbus.Int64(exitstatus << 8),

1314

1824

dbus.String(command))

1315

1825

else:

1316

1826

# Emit D-Bus signal

1317

1827

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

1318

dbus.Int64(condition),

1828

dbus.Int64(

1829

# This is specific to GNU libC

1830

(exitstatus << 8)

1831

| self.last_checker_signal),

1319

1832

dbus.String(command))

1320

1321

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

1322

*args, **kwargs)

1833

return ret

1323

1834

1324

1835

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

1325

old_checker = self.checker

1326

if self.checker is not None:

1327

old_checker_pid = self.checker.pid

1328

else:

1329

old_checker_pid = None

1836

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

1330

1837

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

1331

1838

# Only if new checker process was started

1332

1839

if (self.checker is not None

1341

1848

1342

1849

def approve(self, value=True):

1343

1850

self.approved = value

1344

gobject.timeout_add(timedelta_to_milliseconds

1345

(self.approval_duration),

1346

self._reset_approved)

1851

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

1852

* 1000), self._reset_approved)

1347

1853

self.send_changedstate()

1348

1854

1349

1855

## D-Bus methods, signals & properties

1350

_interface = "se.recompile.Mandos.Client"

1351

1856

1352

1857

## Interfaces

1353

1858

1354

@dbus_interface_annotations(_interface)

1355

def _foo(self):

1356

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

1357

"false"}

1358

1359

1859

## Signals

1360

1860

1361

1861

# CheckerCompleted - signal

1371

1871

pass

1372

1872

1373

1873

# PropertyChanged - signal

1874

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

1374

1875

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

1375

1876

def PropertyChanged(self, property, value):

1376

1877

"D-Bus signal"

1410

1911

self.checked_ok()

1411

1912

1412

1913

# Enable - method

1914

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

1413

1915

@dbus.service.method(_interface)

1414

1916

def Enable(self):

1415

1917

"D-Bus method"

1416

1918

self.enable()

1417

1919

1418

1920

# StartChecker - method

1921

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

1419

1922

@dbus.service.method(_interface)

1420

1923

def StartChecker(self):

1421

1924

"D-Bus method"

1422

1925

self.start_checker()

1423

1926

1424

1927

# Disable - method

1928

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

1425

1929

@dbus.service.method(_interface)

1426

1930

def Disable(self):

1427

1931

"D-Bus method"

1428

1932

self.disable()

1429

1933

1430

1934

# StopChecker - method

1935

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

1431

1936

@dbus.service.method(_interface)

1432

1937

def StopChecker(self):

1433

1938

self.stop_checker()

1440

1945

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

1441

1946

1442

1947

# ApprovedByDefault - property

1443

@dbus_service_property(_interface, signature="b",

1948

@dbus_service_property(_interface,

1949

signature="b",

1444

1950

access="readwrite")

1445

1951

def ApprovedByDefault_dbus_property(self, value=None):

1446

1952

if value is None: # get

1448

1954

self.approved_by_default = bool(value)

1449

1955

1450

1956

# ApprovalDelay - property

1451

@dbus_service_property(_interface, signature="t",

1957

@dbus_service_property(_interface,

1958

signature="t",

1452

1959

access="readwrite")

1453

1960

def ApprovalDelay_dbus_property(self, value=None):

1454

1961

if value is None: # get

1455

return dbus.UInt64(self.approval_delay_milliseconds())

1962

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

1963

* 1000)

1456

1964

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

1457

1965

1458

1966

# ApprovalDuration - property

1459

@dbus_service_property(_interface, signature="t",

1967

@dbus_service_property(_interface,

1968

signature="t",

1460

1969

access="readwrite")

1461

1970

def ApprovalDuration_dbus_property(self, value=None):

1462

1971

if value is None: # get

1463

return dbus.UInt64(timedelta_to_milliseconds(

1464

self.approval_duration))

1972

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

1973

* 1000)

1465

1974

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

1466

1975

1467

1976

# Name - property

1977

@dbus_annotations(

1978

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

1468

1979

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

1469

1980

def Name_dbus_property(self):

1470

1981

return dbus.String(self.name)

1471

1982

1472

1983

# Fingerprint - property

1984

@dbus_annotations(

1985

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

1473

1986

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

1474

1987

def Fingerprint_dbus_property(self):

1475

1988

return dbus.String(self.fingerprint)

1476

1989

1477

1990

# Host - property

1478

@dbus_service_property(_interface, signature="s",

1991

@dbus_service_property(_interface,

1992

signature="s",

1479

1993

access="readwrite")

1480

1994

def Host_dbus_property(self, value=None):

1481

1995

if value is None: # get

1482

1996

return dbus.String(self.host)

1483

self.host = unicode(value)

1997

self.host = str(value)

1484

1998

1485

1999

# Created - property

2000

@dbus_annotations(

2001

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

1486

2002

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

1487

2003

def Created_dbus_property(self):

1488

2004

return datetime_to_dbus(self.created)

1493

2009

return datetime_to_dbus(self.last_enabled)

1494

2010

1495

2011

# Enabled - property

1496

@dbus_service_property(_interface, signature="b",

2012

@dbus_service_property(_interface,

2013

signature="b",

1497

2014

access="readwrite")

1498

2015

def Enabled_dbus_property(self, value=None):

1499

2016

if value is None: # get

1504

2021

self.disable()

1505

2022

1506

2023

# LastCheckedOK - property

1507

@dbus_service_property(_interface, signature="s",

2024

@dbus_service_property(_interface,

2025

signature="s",

1508

2026

access="readwrite")

1509

2027

def LastCheckedOK_dbus_property(self, value=None):

1510

2028

if value is not None:

1513

2031

return datetime_to_dbus(self.last_checked_ok)

1514

2032

1515

2033

# LastCheckerStatus - property

1516

@dbus_service_property(_interface, signature="n",

1517

access="read")

2034

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

1518

2035

def LastCheckerStatus_dbus_property(self):

1519

2036

return dbus.Int16(self.last_checker_status)

1520

2037

1529

2046

return datetime_to_dbus(self.last_approval_request)

1530

2047

1531

2048

# Timeout - property

1532

@dbus_service_property(_interface, signature="t",

2049

@dbus_service_property(_interface,

2050

signature="t",

1533

2051

access="readwrite")

1534

2052

def Timeout_dbus_property(self, value=None):

1535

2053

if value is None: # get

1536

return dbus.UInt64(self.timeout_milliseconds())

2054

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

1537

2055

old_timeout = self.timeout

1538

2056

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

1539

2057

# Reschedule disabling

1547

2065

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

1548

2066

is None):

1549

2067

return

1550

gobject.source_remove(self.disable_initiator_tag)

1551

self.disable_initiator_tag = (

1552

gobject.timeout_add(

1553

timedelta_to_milliseconds(self.expires - now),

1554

self.disable))

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)

1555

2072

1556

2073

# ExtendedTimeout - property

1557

@dbus_service_property(_interface, signature="t",

2074

@dbus_service_property(_interface,

2075

signature="t",

1558

2076

access="readwrite")

1559

2077

def ExtendedTimeout_dbus_property(self, value=None):

1560

2078

if value is None: # get

1561

return dbus.UInt64(self.extended_timeout_milliseconds())

2079

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

2080

* 1000)

1562

2081

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

1563

2082

1564

2083

# Interval - property

1565

@dbus_service_property(_interface, signature="t",

2084

@dbus_service_property(_interface,

2085

signature="t",

1566

2086

access="readwrite")

1567

2087

def Interval_dbus_property(self, value=None):

1568

2088

if value is None: # get

1569

return dbus.UInt64(self.interval_milliseconds())

2089

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

1570

2090

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

1571

2091

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

1572

2092

return

1573

2093

if self.enabled:

1574

2094

# Reschedule checker run

1575

gobject.source_remove(self.checker_initiator_tag)

1576

self.checker_initiator_tag = (gobject.timeout_add

1577

(value, self.start_checker))

1578

self.start_checker() # Start one now, too

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

1579

2099

1580

2100

# Checker - property

1581

@dbus_service_property(_interface, signature="s",

2101

@dbus_service_property(_interface,

2102

signature="s",

1582

2103

access="readwrite")

1583

2104

def Checker_dbus_property(self, value=None):

1584

2105

if value is None: # get

1585

2106

return dbus.String(self.checker_command)

1586

self.checker_command = unicode(value)

2107

self.checker_command = str(value)

1587

2108

1588

2109

# CheckerRunning - property

1589

@dbus_service_property(_interface, signature="b",

2110

@dbus_service_property(_interface,

2111

signature="b",

1590

2112

access="readwrite")

1591

2113

def CheckerRunning_dbus_property(self, value=None):

1592

2114

if value is None: # get

1597

2119

self.stop_checker()

1598

2120

1599

2121

# ObjectPath - property

2122

@dbus_annotations(

2123

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

2124

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

1600

2125

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

1601

2126

def ObjectPath_dbus_property(self):

1602

2127

return self.dbus_object_path # is already a dbus.ObjectPath

1603

2128

1604

2129

# Secret = property

1605

@dbus_service_property(_interface, signature="ay",

1606

access="write", byte_arrays=True)

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)

1607

2137

def Secret_dbus_property(self, value):

1608

self.secret = str(value)

2138

self.secret = bytes(value)

1609

2139

1610

2140

del _interface

1611

2141

1615

2145

self._pipe = child_pipe

1616

2146

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

1617

2147

if not self._pipe.recv():

1618

raise KeyError()

2148

raise KeyError(fpr)

1619

2149

1620

2150

def __getattribute__(self, name):

1621

2151

if name == '_pipe':

1625

2155

if data[0] == 'data':

1626

2156

return data[1]

1627

2157

if data[0] == 'function':

2158

1628

2159

def func(*args, **kwargs):

1629

2160

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

1630

2161

return self._pipe.recv()[1]

2162

1631

2163

return func

1632

2164

1633

2165

def __setattr__(self, name, value):

1645

2177

def handle(self):

1646

2178

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

1647

2179

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

1648

unicode(self.client_address))

2180

str(self.client_address))

1649

2181

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

1650

2182

self.server.child_pipe.fileno())

1651

2183

1652

session = (gnutls.connection

1653

.ClientSession(self.request,

1654

gnutls.connection

1655

.X509Credentials()))

1656

1657

# Note: gnutls.connection.X509Credentials is really a

1658

# generic GnuTLS certificate credentials object so long as

1659

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

1660

# here despite using OpenPGP certificates.

2184

session = gnutls.ClientSession(self.request)

1661

2185

1662

2186

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

1663

2187

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

1667

2191

priority = self.server.gnutls_priority

1668

2192

if priority is None:

1669

2193

priority = "NORMAL"

1670

(gnutls.library.functions

1671

.gnutls_priority_set_direct(session._c_object,

1672

priority, None))

2194

gnutls.priority_set_direct(session._c_object,

2195

priority.encode("utf-8"),

2196

None)

1673

2197

1674

2198

# Start communication using the Mandos protocol

1675

2199

# Get protocol number

1677

2201

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

1678

2202

try:

1679

2203

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

1680

raise RuntimeError

2204

raise RuntimeError(line)

1681

2205

except (ValueError, IndexError, RuntimeError) as error:

1682

2206

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

1683

2207

return

1685

2209

# Start GnuTLS connection

1686

2210

try:

1687

2211

session.handshake()

1688

except gnutls.errors.GNUTLSError as error:

2212

except gnutls.Error as error:

1689

2213

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

1690

2214

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

1691

2215

# established. Just abandon the request.

1695

2219

approval_required = False

1696

2220

try:

1697

2221

try:

1698

fpr = self.fingerprint(self.peer_certificate

1699

(session))

1700

except (TypeError,

1701

gnutls.errors.GNUTLSError) as error:

2222

fpr = self.fingerprint(

2223

self.peer_certificate(session))

2224

except (TypeError, gnutls.Error) as error:

1702

2225

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

1703

2226

return

1704

2227

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

1717

2240

while True:

1718

2241

if not client.enabled:

1719

2242

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

1720

client.name)

2243

client.name)

1721

2244

if self.server.use_dbus:

1722

2245

# Emit D-Bus signal

1723

2246

client.Rejected("Disabled")

1732

2255

if self.server.use_dbus:

1733

2256

# Emit D-Bus signal

1734

2257

client.NeedApproval(

1735

client.approval_delay_milliseconds(),

1736

client.approved_by_default)

2258

client.approval_delay.total_seconds()

2259

* 1000, client.approved_by_default)

1737

2260

else:

1738

2261

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

1739

2262

client.name)

1745

2268

#wait until timeout or approved

1746

2269

time = datetime.datetime.now()

1747

2270

client.changedstate.acquire()

1748

client.changedstate.wait(

1749

float(timedelta_to_milliseconds(delay)

1750

/ 1000))

2271

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

1751

2272

client.changedstate.release()

1752

2273

time2 = datetime.datetime.now()

1753

2274

if (time2 - time) >= delay:

1764

2285

else:

1765

2286

delay -= time2 - time

1766

2287

1767

sent_size = 0

1768

while sent_size < len(client.secret):

1769

try:

1770

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

1771

except gnutls.errors.GNUTLSError as error:

1772

logger.warning("gnutls send failed",

1773

exc_info=error)

1774

return

1775

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

1776

sent, len(client.secret)

1777

- (sent_size + sent))

1778

sent_size += sent

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

1779

2294

1780

2295

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

1781

2296

# bump the timeout using extended_timeout

1789

2304

client.approvals_pending -= 1

1790

2305

try:

1791

2306

session.bye()

1792

except gnutls.errors.GNUTLSError as error:

2307

except gnutls.Error as error:

1793

2308

logger.warning("GnuTLS bye failed",

1794

2309

exc_info=error)

1795

2310

1797

2312

def peer_certificate(session):

1798

2313

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

1799

2314

# If not an OpenPGP certificate...

1800

if (gnutls.library.functions

1801

.gnutls_certificate_type_get(session._c_object)

1802

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1803

# ...do the normal thing

1804

return session.peer_certificate

2315

if (gnutls.certificate_type_get(session._c_object)

2316

!= gnutls.CRT_OPENPGP):

2317

# ...return invalid data

2318

return b""

1805

2319

list_size = ctypes.c_uint(1)

1806

cert_list = (gnutls.library.functions

1807

.gnutls_certificate_get_peers

2320

cert_list = (gnutls.certificate_get_peers

1808

2321

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

1809

2322

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

1810

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

1811

" certificate")

2323

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

1812

2324

if list_size.value == 0:

1813

2325

return None

1814

2326

cert = cert_list[0]

1818

2330

def fingerprint(openpgp):

1819

2331

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1820

2332

# New GnuTLS "datum" with the OpenPGP public key

1821

datum = (gnutls.library.types

1822

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

1823

ctypes.POINTER

1824

(ctypes.c_ubyte)),

1825

ctypes.c_uint(len(openpgp))))

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)))

1826

2337

# New empty GnuTLS certificate

1827

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1828

(gnutls.library.functions

1829

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2338

crt = gnutls.openpgp_crt_t()

2339

gnutls.openpgp_crt_init(ctypes.byref(crt))

1830

2340

# Import the OpenPGP public key into the certificate

1831

(gnutls.library.functions

1832

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

1833

gnutls.library.constants

1834

.GNUTLS_OPENPGP_FMT_RAW))

2341

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

2342

gnutls.OPENPGP_FMT_RAW)

1835

2343

# Verify the self signature in the key

1836

2344

crtverify = ctypes.c_uint()

1837

(gnutls.library.functions

1838

.gnutls_openpgp_crt_verify_self(crt, 0,

1839

ctypes.byref(crtverify)))

2345

gnutls.openpgp_crt_verify_self(crt, 0,

2346

ctypes.byref(crtverify))

1840

2347

if crtverify.value != 0:

1841

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1842

raise (gnutls.errors.CertificateSecurityError

1843

("Verify failed"))

2348

gnutls.openpgp_crt_deinit(crt)

2349

raise gnutls.CertificateSecurityError("Verify failed")

1844

2350

# New buffer for the fingerprint

1845

2351

buf = ctypes.create_string_buffer(20)

1846

2352

buf_len = ctypes.c_size_t()

1847

2353

# Get the fingerprint from the certificate into the buffer

1848

(gnutls.library.functions

1849

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

1850

ctypes.byref(buf_len)))

2354

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

2355

ctypes.byref(buf_len))

1851

2356

# Deinit the certificate

1852

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2357

gnutls.openpgp_crt_deinit(crt)

1853

2358

# Convert the buffer to a Python bytestring

1854

2359

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

1855

2360

# Convert the bytestring to hexadecimal notation

1859

2364

1860

2365

class MultiprocessingMixIn(object):

1861

2366

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

2367

1862

2368

def sub_process_main(self, request, address):

1863

2369

try:

1864

2370

self.finish_request(request, address)

1876

2382

1877

2383

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1878

2384

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

2385

1879

2386

def process_request(self, request, client_address):

1880

2387

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

1881

2388

1890

2397

1891

2398

def add_pipe(self, parent_pipe, proc):

1892

2399

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

1893

raise NotImplementedError

2400

raise NotImplementedError()

1894

2401

1895

2402

1896

2403

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1902

2409

interface: None or a network interface name (string)

1903

2410

use_ipv6: Boolean; to use IPv6 or not

1904

2411

"""

2412

1905

2413

def __init__(self, server_address, RequestHandlerClass,

1906

interface=None, use_ipv6=True):

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

"""

1907

2420

self.interface = interface

1908

2421

if use_ipv6:

1909

2422

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.

1910

2449

socketserver.TCPServer.__init__(self, server_address,

1911

2450

RequestHandlerClass)

2451

1912

2452

def server_bind(self):

1913

2453

"""This overrides the normal server_bind() function

1914

2454

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

1915

2455

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

2456

global SO_BINDTODEVICE

1916

2457

if self.interface is not None:

1917

2458

if SO_BINDTODEVICE is None:

1918

logger.error("SO_BINDTODEVICE does not exist;"

1919

" cannot bind to interface %s",

1920

self.interface)

1921

else:

1922

try:

1923

self.socket.setsockopt(socket.SOL_SOCKET,

1924

SO_BINDTODEVICE,

1925

str(self.interface

1926

+ '\0'))

1927

except socket.error as error:

1928

if error[0] == errno.EPERM:

1929

logger.error("No permission to"

1930

" bind to interface %s",

1931

self.interface)

1932

elif error[0] == errno.ENOPROTOOPT:

1933

logger.error("SO_BINDTODEVICE not available;"

1934

" cannot bind to interface %s",

1935

self.interface)

1936

else:

1937

raise

2459

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

2460

# common enough.

2461

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

2462

SO_BINDTODEVICE = 25

2463

try:

2464

self.socket.setsockopt(

2465

socket.SOL_SOCKET, SO_BINDTODEVICE,

2466

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

2467

except socket.error as error:

2468

if error.errno == errno.EPERM:

2469

logger.error("No permission to bind to"

2470

" interface %s", self.interface)

2471

elif error.errno == errno.ENOPROTOOPT:

2472

logger.error("SO_BINDTODEVICE not available;"

2473

" cannot bind to interface %s",

2474

self.interface)

2475

elif error.errno == errno.ENODEV:

2476

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

2477

" cannot bind", self.interface)

2478

else:

2479

raise

1938

2480

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

1939

2481

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

1940

2482

if not self.server_address[0]:

1941

2483

if self.address_family == socket.AF_INET6:

1942

2484

any_address = "::" # in6addr_any

1943

2485

else:

1944

any_address = socket.INADDR_ANY

2486

any_address = "0.0.0.0" # INADDR_ANY

1945

2487

self.server_address = (any_address,

1946

2488

self.server_address[1])

1947

2489

elif not self.server_address[1]:

1948

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

1949

0)

2490

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

1950

2491

# if self.interface:

1951

2492

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

1952

2493

# 0, # port

1964

2505

gnutls_priority GnuTLS priority string

1965

2506

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

1966

2507

1967

Assumes a gobject.MainLoop event loop.

2508

Assumes a GLib.MainLoop event loop.

1968

2509

"""

2510

1969

2511

def __init__(self, server_address, RequestHandlerClass,

1970

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

1971

gnutls_priority=None, use_dbus=True):

2512

interface=None,

2513

use_ipv6=True,

2514

clients=None,

2515

gnutls_priority=None,

2516

use_dbus=True,

2517

socketfd=None):

1972

2518

self.enabled = False

1973

2519

self.clients = clients

1974

2520

if self.clients is None:

1978

2524

IPv6_TCPServer.__init__(self, server_address,

1979

2525

RequestHandlerClass,

1980

2526

interface = interface,

1981

use_ipv6 = use_ipv6)

2527

use_ipv6 = use_ipv6,

2528

socketfd = socketfd)

2529

1982

2530

def server_activate(self):

1983

2531

if self.enabled:

1984

2532

return socketserver.TCPServer.server_activate(self)

1988

2536

1989

2537

def add_pipe(self, parent_pipe, proc):

1990

2538

# Call "handle_ipc" for both data and EOF events

1991

gobject.io_add_watch(parent_pipe.fileno(),

1992

gobject.IO_IN | gobject.IO_HUP,

1993

functools.partial(self.handle_ipc,

1994

parent_pipe =

1995

parent_pipe,

1996

proc = proc))

2539

GLib.io_add_watch(

2540

parent_pipe.fileno(),

2541

GLib.IO_IN | GLib.IO_HUP,

2542

functools.partial(self.handle_ipc,

2543

parent_pipe = parent_pipe,

2544

proc = proc))

1997

2545

1998

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

1999

proc = None, client_object=None):

2546

def handle_ipc(self, source, condition,

2547

parent_pipe=None,

2548

proc = None,

2549

client_object=None):

2000

2550

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

2001

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

2551

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

2002

2552

# Wait for other process to exit

2003

2553

proc.join()

2004

2554

return False

2011

2561

fpr = request[1]

2012

2562

address = request[2]

2013

2563

2014

for c in self.clients.itervalues():

2564

for c in self.clients.values():

2015

2565

if c.fingerprint == fpr:

2016

2566

client = c

2017

2567

break

2025

2575

parent_pipe.send(False)

2026

2576

return False

2027

2577

2028

gobject.io_add_watch(parent_pipe.fileno(),

2029

gobject.IO_IN | gobject.IO_HUP,

2030

functools.partial(self.handle_ipc,

2031

parent_pipe =

2032

parent_pipe,

2033

proc = proc,

2034

client_object =

2035

client))

2578

GLib.io_add_watch(

2579

parent_pipe.fileno(),

2580

GLib.IO_IN | GLib.IO_HUP,

2581

functools.partial(self.handle_ipc,

2582

parent_pipe = parent_pipe,

2583

proc = proc,

2584

client_object = client))

2036

2585

parent_pipe.send(True)

2037

2586

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

2038

2587

# same fileno

2044

2593

2045

2594

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

2046

2595

funcname)(*args,

2047

**kwargs)))

2596

**kwargs)))

2048

2597

2049

2598

if command == 'getattr':

2050

2599

attrname = request[1]

2051

if callable(client_object.__getattribute__(attrname)):

2052

parent_pipe.send(('function',))

2600

if isinstance(client_object.__getattribute__(attrname),

2601

collections.Callable):

2602

parent_pipe.send(('function', ))

2053

2603

else:

2054

parent_pipe.send(('data', client_object

2055

.__getattribute__(attrname)))

2604

parent_pipe.send((

2605

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

2056

2606

2057

2607

if command == 'setattr':

2058

2608

attrname = request[1]

2062

2612

return True

2063

2613

2064

2614

2615

def rfc3339_duration_to_delta(duration):

2616

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

2617

2618

>>> rfc3339_duration_to_delta("P7D")

2619

datetime.timedelta(7)

2620

>>> rfc3339_duration_to_delta("PT60S")

2621

datetime.timedelta(0, 60)

2622

>>> rfc3339_duration_to_delta("PT60M")

2623

datetime.timedelta(0, 3600)

2624

>>> rfc3339_duration_to_delta("PT24H")

2625

datetime.timedelta(1)

2626

>>> rfc3339_duration_to_delta("P1W")

2627

datetime.timedelta(7)

2628

>>> rfc3339_duration_to_delta("PT5M30S")

2629

datetime.timedelta(0, 330)

2630

>>> rfc3339_duration_to_delta("P1DT3M20S")

2631

datetime.timedelta(1, 200)

2632

"""

2633

2634

# Parsing an RFC 3339 duration with regular expressions is not

2635

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

2636

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

2637

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

2638

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

2639

# avoid excessive use of external libraries.

2640

2641

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

2642

Token = collections.namedtuple("Token", (

2643

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

2644

# a "group" containing digits

2645

"value", # datetime.timedelta or None

2646

"followers")) # Tokens valid after this token

2647

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

2648

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

2649

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

2650

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

2651

datetime.timedelta(seconds=1),

2652

frozenset((token_end, )))

2653

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

2654

datetime.timedelta(minutes=1),

2655

frozenset((token_second, token_end)))

2656

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

2657

datetime.timedelta(hours=1),

2658

frozenset((token_minute, token_end)))

2659

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

2660

None,

2661

frozenset((token_hour, token_minute,

2662

token_second)))

2663

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

2664

datetime.timedelta(days=1),

2665

frozenset((token_time, token_end)))

2666

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

2667

datetime.timedelta(weeks=4),

2668

frozenset((token_day, token_end)))

2669

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

2670

datetime.timedelta(weeks=52),

2671

frozenset((token_month, token_end)))

2672

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

2673

datetime.timedelta(weeks=1),

2674

frozenset((token_end, )))

2675

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

2676

frozenset((token_year, token_month,

2677

token_day, token_time,

2678

token_week)))

2679

# Define starting values

2680

value = datetime.timedelta() # Value so far

2681

found_token = None

2682

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

2683

s = duration # String left to parse

2684

# Loop until end token is found

2685

while found_token is not token_end:

2686

# Search for any currently valid tokens

2687

for token in followers:

2688

match = token.regexp.match(s)

2689

if match is not None:

2690

# Token found

2691

if token.value is not None:

2692

# Value found, parse digits

2693

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

2694

# Add to value so far

2695

value += factor * token.value

2696

# Strip token from string

2697

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

2698

# Go to found token

2699

found_token = token

2700

# Set valid next tokens

2701

followers = found_token.followers

2702

break

2703

else:

2704

# No currently valid tokens were found

2705

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

2706

.format(duration))

2707

# End token found

2708

return value

2709

2710

2065

2711

def string_to_delta(interval):

2066

2712

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

2067

2713

2078

2724

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

2079

2725

datetime.timedelta(0, 330)

2080

2726

"""

2727

2728

try:

2729

return rfc3339_duration_to_delta(interval)

2730

except ValueError:

2731

pass

2732

2081

2733

timevalue = datetime.timedelta(0)

2082

2734

for s in interval.split():

2083

2735

try:

2084

suffix = unicode(s[-1])

2736

suffix = s[-1]

2085

2737

value = int(s[:-1])

2086

2738

if suffix == "d":

2087

2739

delta = datetime.timedelta(value)

2094

2746

elif suffix == "w":

2095

2747

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

2096

2748

else:

2097

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

2098

.format(suffix))

2099

except (ValueError, IndexError) as e:

2749

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

2750

except IndexError as e:

2100

2751

raise ValueError(*(e.args))

2101

2752

timevalue += delta

2102

2753

return timevalue

2118

2769

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

2119

2770

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

2120

2771

raise OSError(errno.ENODEV,

2121

"{0} not a character device"

2772

"{} not a character device"

2122

2773

.format(os.devnull))

2123

2774

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

2124

2775

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

2134

2785

2135

2786

parser = argparse.ArgumentParser()

2136

2787

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

2137

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

2788

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

2138

2789

help="show version number and exit")

2139

2790

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

2140

2791

help="Bind to interface IF")

2146

2797

help="Run self-test")

2147

2798

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

2148

2799

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

2149

" to terminal")

2800

" to terminal", default=None)

2150

2801

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

2151

2802

help="Debug level for stdout output")

2152

2803

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

2159

2810

" files")

2160

2811

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

2161

2812

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

2162

" system bus interface")

2813

" system bus interface", default=None)

2163

2814

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

2164

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

2815

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

2816

default=None)

2165

2817

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

2166

2818

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

2167

" state")

2819

" state", default=None)

2820

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

2821

help="Specify a file descriptor to a network"

2822

" socket to use instead of creating one")

2168

2823

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

2169

2824

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

2825

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

2826

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

2827

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

2828

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

2829

default=None)

2170

2830

2171

2831

options = parser.parse_args()

2172

2832

2173

2833

if options.check:

2174

2834

import doctest

2175

doctest.testmod()

2176

sys.exit()

2835

fail_count, test_count = doctest.testmod()

2836

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

2177

2837

2178

2838

# Default values for config file for server-global settings

2179

2839

server_defaults = { "interface": "",

2181

2841

"port": "",

2182

2842

"debug": "False",

2183

2843

"priority":

2184

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

2844

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

2845

":+SIGN-DSA-SHA256",

2185

2846

"servicename": "Mandos",

2186

2847

"use_dbus": "True",

2187

2848

"use_ipv6": "True",

2188

2849

"debuglevel": "",

2189

2850

"restore": "True",

2190

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

2191

}

2851

"socket": "",

2852

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

2853

"foreground": "False",

2854

"zeroconf": "True",

2855

}

2192

2856

2193

2857

# Parse config file for server-global settings

2194

2858

server_config = configparser.SafeConfigParser(server_defaults)

2195

2859

del server_defaults

2196

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

2197

"mandos.conf"))

2860

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

2198

2861

# Convert the SafeConfigParser object to a dict

2199

2862

server_settings = server_config.defaults()

2200

2863

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

2201

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

2864

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

2202

2865

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

2203

2866

option)

2204

2867

if server_settings["port"]:

2205

2868

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

2206

2869

"port")

2870

if server_settings["socket"]:

2871

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

2872

"socket")

2873

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

2874

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

2875

# happen with a supplied network socket.

2876

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

2877

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

2878

["socket"])

2207

2879

del server_config

2208

2880

2209

2881

# Override the settings from the config file with command line

2210

2882

# options, if set.

2211

2883

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

2212

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

2213

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

2214

"statedir"):

2884

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

2885

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

2886

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

2215

2887

value = getattr(options, option)

2216

2888

if value is not None:

2217

2889

server_settings[option] = value

2218

2890

del options

2219

2891

# Force all strings to be unicode

2220

2892

for option in server_settings.keys():

2221

if type(server_settings[option]) is str:

2222

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

2893

if isinstance(server_settings[option], bytes):

2894

server_settings[option] = (server_settings[option]

2895

.decode("utf-8"))

2896

# Force all boolean options to be boolean

2897

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

2898

"foreground", "zeroconf"):

2899

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

2900

# Debug implies foreground

2901

if server_settings["debug"]:

2902

server_settings["foreground"] = True

2223

2903

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

2224

2904

2225

2905

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

2226

2906

2907

if (not server_settings["zeroconf"]

2908

and not (server_settings["port"]

2909

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

2910

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

2911

2227

2912

# For convenience

2228

2913

debug = server_settings["debug"]

2229

2914

debuglevel = server_settings["debuglevel"]

2231

2916

use_ipv6 = server_settings["use_ipv6"]

2232

2917

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

2233

2918

stored_state_file)

2919

foreground = server_settings["foreground"]

2920

zeroconf = server_settings["zeroconf"]

2234

2921

2235

2922

if debug:

2236

2923

initlogger(debug, logging.DEBUG)

2242

2929

initlogger(debug, level)

2243

2930

2244

2931

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

2245

syslogger.setFormatter(logging.Formatter

2246

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

2247

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

2248

.format(server_settings

2249

["servicename"])))

2932

syslogger.setFormatter(

2933

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

2934

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

2935

server_settings["servicename"])))

2250

2936

2251

2937

# Parse config file with clients

2252

2938

client_config = configparser.SafeConfigParser(Client

2257

2943

global mandos_dbus_service

2258

2944

mandos_dbus_service = None

2259

2945

2260

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

2261

server_settings["port"]),

2262

ClientHandler,

2263

interface=(server_settings["interface"]

2264

or None),

2265

use_ipv6=use_ipv6,

2266

gnutls_priority=

2267

server_settings["priority"],

2268

use_dbus=use_dbus)

2269

if not debug:

2270

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

2946

socketfd = None

2947

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

2948

socketfd = server_settings["socket"]

2949

tcp_server = MandosServer(

2950

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

2951

ClientHandler,

2952

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

2953

use_ipv6=use_ipv6,

2954

gnutls_priority=server_settings["priority"],

2955

use_dbus=use_dbus,

2956

socketfd=socketfd)

2957

if not foreground:

2958

pidfilename = "/run/mandos.pid"

2959

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

2960

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

2961

pidfile = None

2271

2962

try:

2272

pidfile = open(pidfilename, "w")

2963

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

2273

2964

except IOError as e:

2274

2965

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

2275

2966

exc_info=e)

2276

2967

2277

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

2968

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

2969

("mandos", "mandos"),

2970

("nobody", "nogroup")):

2278

2971

try:

2279

2972

uid = pwd.getpwnam(name).pw_uid

2280

gid = pwd.getpwnam(name).pw_gid

2973

gid = pwd.getpwnam(group).pw_gid

2281

2974

break

2282

2975

except KeyError:

2283

2976

continue

2287

2980

try:

2288

2981

os.setgid(gid)

2289

2982

os.setuid(uid)

2983

if debug:

2984

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

2985

gid))

2290

2986

except OSError as error:

2291

if error[0] != errno.EPERM:

2292

raise error

2987

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

2988

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

2989

if error.errno != errno.EPERM:

2990

raise

2293

2991

2294

2992

if debug:

2295

2993

# Enable all possible GnuTLS debugging

2296

2994

2297

2995

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

2298

2996

# - GnuTLS manual

2299

gnutls.library.functions.gnutls_global_set_log_level(11)

2997

gnutls.global_set_log_level(11)

2300

2998

2301

@gnutls.library.types.gnutls_log_func

2999

@gnutls.log_func

2302

3000

def debug_gnutls(level, string):

2303

3001

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

2304

3002

2305

(gnutls.library.functions

2306

.gnutls_global_set_log_function(debug_gnutls))

3003

gnutls.global_set_log_function(debug_gnutls)

2307

3004

2308

3005

# Redirect stdin so all checkers get /dev/null

2309

3006

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

2312

3009

os.close(null)

2313

3010

2314

3011

# Need to fork before connecting to D-Bus

2315

if not debug:

3012

if not foreground:

2316

3013

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

2317

3014

daemon()

2318

3015

2319

gobject.threads_init()

3016

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

3017

# to inform GLib that threads will be used.

3018

GLib.threads_init()

2320

3019

2321

3020

global main_loop

2322

3021

# From the Avahi example code

2323

3022

DBusGMainLoop(set_as_default=True)

2324

main_loop = gobject.MainLoop()

3023

main_loop = GLib.MainLoop()

2325

3024

bus = dbus.SystemBus()

2326

3025

# End of Avahi example code

2327

3026

if use_dbus:

2328

3027

try:

2329

3028

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

2330

bus, do_not_queue=True)

2331

old_bus_name = (dbus.service.BusName

2332

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

2333

do_not_queue=True))

2334

except dbus.exceptions.NameExistsException as e:

3029

bus,

3030

do_not_queue=True)

3031

old_bus_name = dbus.service.BusName(

3032

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

3033

do_not_queue=True)

3034

except dbus.exceptions.DBusException as e:

2335

3035

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

2336

3036

use_dbus = False

2337

3037

server_settings["use_dbus"] = False

2338

3038

tcp_server.use_dbus = False

2339

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2340

service = AvahiServiceToSyslog(name =

2341

server_settings["servicename"],

2342

servicetype = "_mandos._tcp",

2343

protocol = protocol, bus = bus)

2344

if server_settings["interface"]:

2345

service.interface = (if_nametoindex

2346

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

3039

if zeroconf:

3040

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

3041

service = AvahiServiceToSyslog(

3042

name = server_settings["servicename"],

3043

servicetype = "_mandos._tcp",

3044

protocol = protocol,

3045

bus = bus)

3046

if server_settings["interface"]:

3047

service.interface = if_nametoindex(

3048

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

2347

3049

2348

3050

global multiprocessing_manager

2349

3051

multiprocessing_manager = multiprocessing.Manager()

2356

3058

old_client_settings = {}

2357

3059

clients_data = {}

2358

3060

3061

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

3062

global wnull

3063

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

3064

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

3065

# mode

3066

if debug or not foreground:

3067

wnull.close()

3068

2359

3069

# Get client data and settings from last running state.

2360

3070

if server_settings["restore"]:

2361

3071

try:

2362

3072

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

2363

clients_data, old_client_settings = (pickle.load

2364

(stored_state))

3073

if sys.version_info.major == 2:

3074

clients_data, old_client_settings = pickle.load(

3075

stored_state)

3076

else:

3077

bytes_clients_data, bytes_old_client_settings = (

3078

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

3079

### Fix bytes to strings

3080

## clients_data

3081

# .keys()

3082

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

3083

if isinstance(key, bytes)

3084

else key): value

3085

for key, value in

3086

bytes_clients_data.items() }

3087

del bytes_clients_data

3088

for key in clients_data:

3089

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

3090

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

3091

for k, v in

3092

clients_data[key].items() }

3093

clients_data[key] = value

3094

# .client_structure

3095

value["client_structure"] = [

3096

(s.decode("utf-8")

3097

if isinstance(s, bytes)

3098

else s) for s in

3099

value["client_structure"] ]

3100

# .name & .host

3101

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

3102

if isinstance(value[k], bytes):

3103

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

3104

## old_client_settings

3105

# .keys()

3106

old_client_settings = {

3107

(key.decode("utf-8")

3108

if isinstance(key, bytes)

3109

else key): value

3110

for key, value in

3111

bytes_old_client_settings.items() }

3112

del bytes_old_client_settings

3113

# .host

3114

for value in old_client_settings.values():

3115

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

3116

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

3117

.decode("utf-8"))

2365

3118

os.remove(stored_state_path)

2366

3119

except IOError as e:

2367

3120

if e.errno == errno.ENOENT:

2368

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

2369

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

3121

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

3122

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

2370

3123

else:

2371

3124

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

2372

3125

exc_info=e)

2373

3126

raise

2374

3127

except EOFError as e:

2375

3128

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

2376

"EOFError:", exc_info=e)

3129

"EOFError:",

3130

exc_info=e)

2377

3131

2378

3132

with PGPEngine() as pgp:

2379

for client_name, client in clients_data.iteritems():

3133

for client_name, client in clients_data.items():

3134

# Skip removed clients

3135

if client_name not in client_settings:

3136

continue

3137

2380

3138

# Decide which value to use after restoring saved state.

2381

3139

# We have three different values: Old config file,

2382

3140

# new config file, and saved state.

2387

3145

# For each value in new config, check if it

2388

3146

# differs from the old config value (Except for

2389

3147

# the "secret" attribute)

2390

if (name != "secret" and

2391

value != old_client_settings[client_name]

2392

[name]):

3148

if (name != "secret"

3149

and (value !=

3150

old_client_settings[client_name][name])):

2393

3151

client[name] = value

2394

3152

except KeyError:

2395

3153

pass

2396

3154

2397

3155

# Clients who has passed its expire date can still be

2398

# enabled if its last checker was successful. Clients

3156

# enabled if its last checker was successful. A Client

2399

3157

# whose checker succeeded before we stored its state is

2400

3158

# assumed to have successfully run all checkers during

2401

3159

# downtime.

2403

3161

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

2404

3162

if not client["last_checked_ok"]:

2405

3163

logger.warning(

2406

"disabling client {0} - Client never "

2407

"performed a successful checker"

2408

.format(client_name))

3164

"disabling client {} - Client never "

3165

"performed a successful checker".format(

3166

client_name))

2409

3167

client["enabled"] = False

2410

3168

elif client["last_checker_status"] != 0:

2411

3169

logger.warning(

2412

"disabling client {0} - Client "

2413

"last checker failed with error code {1}"

2414

.format(client_name,

2415

client["last_checker_status"]))

3170

"disabling client {} - Client last"

3171

" checker failed with error code"

3172

" {}".format(

3173

client_name,

3174

client["last_checker_status"]))

2416

3175

client["enabled"] = False

2417

3176

else:

2418

client["expires"] = (datetime.datetime

2419

.utcnow()

2420

+ client["timeout"])

3177

client["expires"] = (

3178

datetime.datetime.utcnow()

3179

+ client["timeout"])

2421

3180

logger.debug("Last checker succeeded,"

2422

" keeping {0} enabled"

2423

.format(client_name))

3181

" keeping {} enabled".format(

3182

client_name))

2424

3183

try:

2425

client["secret"] = (

2426

pgp.decrypt(client["encrypted_secret"],

2427

client_settings[client_name]

2428

["secret"]))

3184

client["secret"] = pgp.decrypt(

3185

client["encrypted_secret"],

3186

client_settings[client_name]["secret"])

2429

3187

except PGPError:

2430

3188

# If decryption fails, we use secret from new settings

2431

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

2432

.format(client_name))

2433

client["secret"] = (

2434

client_settings[client_name]["secret"])

3189

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

3190

client_name))

3191

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

3192

["secret"])

2435

3193

2436

3194

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

2437

3195

for client_name in (set(old_client_settings)

2442

3200

clients_data[client_name] = client_settings[client_name]

2443

3201

2444

3202

# Create all client objects

2445

for client_name, client in clients_data.iteritems():

3203

for client_name, client in clients_data.items():

2446

3204

tcp_server.clients[client_name] = client_class(

2447

name = client_name, settings = client)

3205

name = client_name,

3206

settings = client,

3207

server_settings = server_settings)

2448

3208

2449

3209

if not tcp_server.clients:

2450

3210

logger.warning("No clients defined")

2451

3211

2452

if not debug:

2453

try:

2454

with pidfile:

2455

pid = os.getpid()

2456

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

2457

del pidfile

2458

except IOError:

2459

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

2460

pidfilename, pid)

2461

except NameError:

2462

# "pidfile" was never created

2463

pass

3212

if not foreground:

3213

if pidfile is not None:

3214

pid = os.getpid()

3215

try:

3216

with pidfile:

3217

print(pid, file=pidfile)

3218

except IOError:

3219

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

3220

pidfilename, pid)

3221

del pidfile

2464

3222

del pidfilename

2465

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

2466

3223

2467

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

2468

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

3224

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

3225

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3226

lambda: main_loop.quit() and False)

2469

3227

2470

3228

if use_dbus:

2471

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

2472

"se.bsnet.fukt.Mandos"})

2473

class MandosDBusService(DBusObjectWithProperties):

3229

3230

@alternate_dbus_interfaces(

3231

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

3232

class MandosDBusService(DBusObjectWithObjectManager):

2474

3233

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

3234

2475

3235

def __init__(self):

2476

3236

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

3237

2477

3238

_interface = "se.recompile.Mandos"

2478

3239

2479

@dbus_interface_annotations(_interface)

2480

def _foo(self):

2481

return { "org.freedesktop.DBus.Property"

2482

".EmitsChangedSignal":

2483

"false"}

2484

2485

3240

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

2486

3241

def ClientAdded(self, objpath):

2487

3242

"D-Bus signal"

2492

3247

"D-Bus signal"

2493

3248

pass

2494

3249

3250

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

3251

"true"})

2495

3252

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

2496

3253

def ClientRemoved(self, objpath, name):

2497

3254

"D-Bus signal"

2498

3255

pass

2499

3256

3257

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

3258

"true"})

2500

3259

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

2501

3260

def GetAllClients(self):

2502

3261

"D-Bus method"

2503

return dbus.Array(c.dbus_object_path

2504

for c in

2505

tcp_server.clients.itervalues())

3262

return dbus.Array(c.dbus_object_path for c in

3263

tcp_server.clients.values())

2506

3264

3265

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

3266

"true"})

2507

3267

@dbus.service.method(_interface,

2508

3268

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

2509

3269

def GetAllClientsWithProperties(self):

2510

3270

"D-Bus method"

2511

3271

return dbus.Dictionary(

2512

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

2513

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

3272

{ c.dbus_object_path: c.GetAll(

3273

"se.recompile.Mandos.Client")

3274

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

2514

3275

signature="oa{sv}")

2515

3276

2516

3277

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

2517

3278

def RemoveClient(self, object_path):

2518

3279

"D-Bus method"

2519

for c in tcp_server.clients.itervalues():

3280

for c in tcp_server.clients.values():

2520

3281

if c.dbus_object_path == object_path:

2521

3282

del tcp_server.clients[c.name]

2522

3283

c.remove_from_connection()

2523

# Don't signal anything except ClientRemoved

3284

# Don't signal the disabling

2524

3285

c.disable(quiet=True)

2525

# Emit D-Bus signal

2526

self.ClientRemoved(object_path, c.name)

3286

# Emit D-Bus signal for removal

3287

self.client_removed_signal(c)

2527

3288

return

2528

3289

raise KeyError(object_path)

2529

3290

2530

3291

del _interface

3292

3293

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3294

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

3295

def GetManagedObjects(self):

3296

"""D-Bus method"""

3297

return dbus.Dictionary(

3298

{ client.dbus_object_path:

3299

dbus.Dictionary(

3300

{ interface: client.GetAll(interface)

3301

for interface in

3302

client._get_all_interface_names()})

3303

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

3304

3305

def client_added_signal(self, client):

3306

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

3307

if use_dbus:

3308

# New standard signal

3309

self.InterfacesAdded(

3310

client.dbus_object_path,

3311

dbus.Dictionary(

3312

{ interface: client.GetAll(interface)

3313

for interface in

3314

client._get_all_interface_names()}))

3315

# Old signal

3316

self.ClientAdded(client.dbus_object_path)

3317

3318

def client_removed_signal(self, client):

3319

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

3320

if use_dbus:

3321

# New standard signal

3322

self.InterfacesRemoved(

3323

client.dbus_object_path,

3324

client._get_all_interface_names())

3325

# Old signal

3326

self.ClientRemoved(client.dbus_object_path,

3327

client.name)

2531

3328

2532

3329

mandos_dbus_service = MandosDBusService()

2533

3330

3331

# Save modules to variables to exempt the modules from being

3332

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

3333

mp = multiprocessing

3334

wn = wnull

2534

3335

def cleanup():

2535

3336

"Cleanup function; run on exit"

2536

service.cleanup()

3337

if zeroconf:

3338

service.cleanup()

2537

3339

2538

multiprocessing.active_children()

3340

mp.active_children()

3341

wn.close()

2539

3342

if not (tcp_server.clients or client_settings):

2540

3343

return

2541

3344

2544

3347

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

2545

3348

clients = {}

2546

3349

with PGPEngine() as pgp:

2547

for client in tcp_server.clients.itervalues():

3350

for client in tcp_server.clients.values():

2548

3351

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

2549

3352

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

2550

3353

key)

2552

3355

2553

3356

# A list of attributes that can not be pickled

2554

3357

# + secret.

2555

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

2556

"checker"))

2557

for name, typ in (inspect.getmembers

2558

(dbus.service.Object)):

3358

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

3359

"checker", "server_settings" }

3360

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

3361

.Object):

2559

3362

exclude.add(name)

2560

3363

2561

3364

client_dict["encrypted_secret"] = (client

2568

3371

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

2569

3372

2570

3373

try:

2571

with (tempfile.NamedTemporaryFile

2572

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

2573

dir=os.path.dirname(stored_state_path),

2574

delete=False)) as stored_state:

2575

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

2576

tempname=stored_state.name

3374

with tempfile.NamedTemporaryFile(

3375

mode='wb',

3376

suffix=".pickle",

3377

prefix='clients-',

3378

dir=os.path.dirname(stored_state_path),

3379

delete=False) as stored_state:

3380

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

3381

protocol = 2)

3382

tempname = stored_state.name

2577

3383

os.rename(tempname, stored_state_path)

2578

3384

except (IOError, OSError) as e:

2579

3385

if not debug:

2582

3388

except NameError:

2583

3389

pass

2584

3390

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

2585

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

3391

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

2586

3392

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

2587

3393

else:

2588

3394

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

2589

3395

exc_info=e)

2590

raise e

3396

raise

2591

3397

2592

3398

# Delete all clients, and settings from config

2593

3399

while tcp_server.clients:

2594

3400

name, client = tcp_server.clients.popitem()

2595

3401

if use_dbus:

2596

3402

client.remove_from_connection()

2597

# Don't signal anything except ClientRemoved

3403

# Don't signal the disabling

2598

3404

client.disable(quiet=True)

3405

# Emit D-Bus signal for removal

2599

3406

if use_dbus:

2600

# Emit D-Bus signal

2601

mandos_dbus_service.ClientRemoved(client

2602

.dbus_object_path,

2603

client.name)

3407

mandos_dbus_service.client_removed_signal(client)

2604

3408

client_settings.clear()

2605

3409

2606

3410

atexit.register(cleanup)

2607

3411

2608

for client in tcp_server.clients.itervalues():

3412

for client in tcp_server.clients.values():

2609

3413

if use_dbus:

2610

# Emit D-Bus signal

2611

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3414

# Emit D-Bus signal for adding

3415

mandos_dbus_service.client_added_signal(client)

2612

3416

# Need to initiate checking of clients

2613

3417

if client.enabled:

2614

3418

client.init_checker()

2617

3421

tcp_server.server_activate()

2618

3422

2619

3423

# Find out what port we got

2620

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

3424

if zeroconf:

3425

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

2621

3426

if use_ipv6:

2622

3427

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

2623

3428

" flowinfo %d, scope_id %d",

2629

3434

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

2630

3435

2631

3436

try:

2632

# From the Avahi example code

2633

try:

2634

service.activate()

2635

except dbus.exceptions.DBusException as error:

2636

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

2637

cleanup()

2638

sys.exit(1)

2639

# End of Avahi example code

3437

if zeroconf:

3438

# From the Avahi example code

3439

try:

3440

service.activate()

3441

except dbus.exceptions.DBusException as error:

3442

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

3443

cleanup()

3444

sys.exit(1)

3445

# End of Avahi example code

2640

3446

2641

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

2642

lambda *args, **kwargs:

2643

(tcp_server.handle_request

2644

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

3447

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

3448

lambda *args, **kwargs:

3449

(tcp_server.handle_request

3450

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

2645

3451

2646

3452

logger.debug("Starting main loop")

2647

3453

main_loop.run()

2657

3463

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

2658

3464

cleanup()

2659

3465

3466

2660

3467

if __name__ == '__main__':

2661

3468

main()