/mandos/release : revision 237.7.160

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#!/usr/bin/python2.7

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#!/usr/bin/python

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

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#

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

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# "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_builtins import *

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try:

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import SocketServer as socketserver

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except ImportError:

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import socketserver

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import SocketServer as socketserver

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import socket

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import argparse

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import datetime

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import gnutls.library.functions

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import gnutls.library.constants

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import gnutls.library.types

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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 ConfigParser as configparser

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import sys

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import re

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import os

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import struct

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import fcntl

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import functools

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try:

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import cPickle as pickle

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except ImportError:

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import pickle

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import cPickle as pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import collections

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import codecs

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import dbus

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import dbus.service

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try:

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import gobject

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except ImportError:

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from gi.repository import GObject as gobject

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import gobject

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import avahi

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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import ctypes.util

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import xml.dom.minidom

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import inspect

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import GnuPGInterface

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try:

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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except ImportError:

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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 = "1.6.9"

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version = "1.6.0"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = None

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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try:

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if_nametoindex = ctypes.cdll.LoadLibrary(

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

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.if_nametoindex)

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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

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

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interface))

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

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ifreq[16:20])[0]

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return interface_index

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def 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.gnupgargs = ['--batch',

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'--home', self.tempdir,

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'--force-mdc',

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'--quiet',

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'--no-use-agent']

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self.gnupg = GnuPGInterface.GnuPG()

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self.gnupg.options.meta_interactive = False

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self.gnupg.options.homedir = self.tempdir

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

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'--quiet',

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'--no-use-agent'])

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def __enter__(self):

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return self

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def password_encode(self, password):

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

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

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

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if len(encoded) > 2048:

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

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

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

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

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return encoded

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

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def encrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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

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with open(os.devnull, "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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return ciphertext

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def decrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir = self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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

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

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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()

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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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return decrypted_plaintext

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class AvahiError(Exception):

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

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self.value = value

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

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**kwargs)

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

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def __unicode__(self):

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return unicode(repr(self.value))

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class AvahiServiceError(AvahiError):

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pass

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class AvahiGroupError(AvahiError):

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pass

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Used to optionally bind to the specified interface.

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name: string; Example: 'Mandos'

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

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

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

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port: integer; what port to announce

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TXT: list of strings; TXT record for the service

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

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bus: dbus.SystemBus()

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"""

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def __init__(self,

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interface = avahi.IF_UNSPEC,

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name = None,

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servicetype = None,

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port = None,

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TXT = None,

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domain = "",

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host = "",

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max_renames = 32768,

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protocol = avahi.PROTO_UNSPEC,

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bus = None):

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

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

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

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protocol = avahi.PROTO_UNSPEC, bus = None):

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self.interface = interface

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self.name = name

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self.type = servicetype

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self.bus = bus

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self.entry_group_state_changed_match = None

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def rename(self, remove=True):

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def rename(self):

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

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if self.rename_count >= self.max_renames:

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

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" after %i retries, exiting.",

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self.rename_count)

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raise AvahiServiceError("Too many renames")

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self.name = str(

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self.server.GetAlternativeServiceName(self.name))

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self.rename_count += 1

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self.name = unicode(self.server

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.GetAlternativeServiceName(self.name))

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

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self.name)

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if remove:

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self.remove()

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self.remove()

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try:

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self.add()

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except dbus.exceptions.DBusException as error:

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if (error.get_dbus_name()

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

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

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return self.rename(remove=False)

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else:

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

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self.cleanup()

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os._exit(1)

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

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self.cleanup()

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os._exit(1)

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self.rename_count += 1

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def remove(self):

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

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self.rename()

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elif state == avahi.ENTRY_GROUP_FAILURE:

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

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str(error))

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

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unicode(error))

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

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.format(error))

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def cleanup(self):

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

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

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

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

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bad_states = {

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avahi.SERVER_INVALID: "Zeroconf server invalid",

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avahi.SERVER_REGISTERING: None,

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avahi.SERVER_COLLISION: "Zeroconf server name collision",

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avahi.SERVER_FAILURE: "Zeroconf server failure",

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}

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bad_states = { avahi.SERVER_INVALID:

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"Zeroconf server invalid",

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avahi.SERVER_REGISTERING: None,

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avahi.SERVER_COLLISION:

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"Zeroconf server name collision",

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avahi.SERVER_FAILURE:

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"Zeroconf server failure" }

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if state in bad_states:

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if bad_states[state] is not None:

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if error is None:

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follow_name_owner_changes=True),

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avahi.DBUS_INTERFACE_SERVER)

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379

self.server.connect_to_signal("StateChanged",

414

self.server_state_changed)

380

self.server_state_changed)

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

416

382

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class AvahiServiceToSyslog(AvahiService):

419

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

385

def rename(self):

420

386

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

421

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

422

syslogger.setFormatter(logging.Formatter(

423

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

424

.format(self.name)))

387

ret = AvahiService.rename(self)

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syslogger.setFormatter(logging.Formatter

389

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

390

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

391

.format(self.name)))

425

392

return ret

426

393

427

def call_pipe(connection, # : multiprocessing.Connection

428

func, *args, **kwargs):

429

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

430

431

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

432

return value on the provided multiprocessing.Connection.

433

"""

434

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

435

connection.close()

394

395

def timedelta_to_milliseconds(td):

396

"Convert a datetime.timedelta() to milliseconds"

397

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

398

+ (td.seconds * 1000)

399

+ (td.microseconds // 1000))

400

436

401

437

402

class Client(object):

438

403

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

465

430

last_checker_status: integer between 0 and 255 reflecting exit

466

431

status of last checker. -1 reflects crashed

467

432

checker, -2 means no checker completed yet.

468

last_checker_signal: The signal which killed the last checker, if

469

last_checker_status is -1

470

433

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

471

434

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

472

435

D-Bus identifiers

477

440

runtime_expansions: Allowed attributes for runtime expansion.

478

441

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

479

442

disabled, or None

480

server_settings: The server_settings dict from main()

481

443

"""

482

444

483

445

runtime_expansions = ("approval_delay", "approval_duration",

485

447

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

486

448

"last_approval_request", "last_checked_ok",

487

449

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

488

client_defaults = {

489

"timeout": "PT5M",

490

"extended_timeout": "PT15M",

491

"interval": "PT2M",

492

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

493

"host": "",

494

"approval_delay": "PT0S",

495

"approval_duration": "PT1S",

496

"approved_by_default": "True",

497

"enabled": "True",

498

}

450

client_defaults = { "timeout": "PT5M",

451

"extended_timeout": "PT15M",

452

"interval": "PT2M",

453

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

454

"host": "",

455

"approval_delay": "PT0S",

456

"approval_duration": "PT1S",

457

"approved_by_default": "True",

458

"enabled": "True",

459

}

460

461

def timeout_milliseconds(self):

462

"Return the 'timeout' attribute in milliseconds"

463

return timedelta_to_milliseconds(self.timeout)

464

465

def extended_timeout_milliseconds(self):

466

"Return the 'extended_timeout' attribute in milliseconds"

467

return timedelta_to_milliseconds(self.extended_timeout)

468

469

def interval_milliseconds(self):

470

"Return the 'interval' attribute in milliseconds"

471

return timedelta_to_milliseconds(self.interval)

472

473

def approval_delay_milliseconds(self):

474

return timedelta_to_milliseconds(self.approval_delay)

499

475

500

476

@staticmethod

501

477

def config_parser(config):

517

493

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

518

494

"enabled")

519

495

520

# Uppercase and remove spaces from fingerprint for later

521

# comparison purposes with return value from the

522

# fingerprint() function

523

496

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

524

497

.replace(" ", ""))

525

498

if "secret" in section:

530

503

"rb") as secfile:

531

504

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

532

505

else:

533

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

506

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

534

507

.format(section))

535

508

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

536

509

client["extended_timeout"] = string_to_delta(

547

520

548

521

return settings

549

522

550

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

523

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

551

524

self.name = name

552

if server_settings is None:

553

server_settings = {}

554

self.server_settings = server_settings

555

525

# adding all client settings

556

for setting, value in settings.items():

526

for setting, value in settings.iteritems():

557

527

setattr(self, setting, value)

558

528

559

529

if self.enabled:

567

537

self.expires = None

568

538

569

539

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

540

# Uppercase and remove spaces from fingerprint for later

541

# comparison purposes with return value from the fingerprint()

542

# function

570

543

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

571

544

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

572

545

datetime.datetime.utcnow())

579

552

self.current_checker_command = None

580

553

self.approved = None

581

554

self.approvals_pending = 0

582

self.changedstate = multiprocessing_manager.Condition(

583

multiprocessing_manager.Lock())

584

self.client_structure = [attr

585

for attr in self.__dict__.iterkeys()

555

self.changedstate = (multiprocessing_manager

556

.Condition(multiprocessing_manager

557

.Lock()))

558

self.client_structure = [attr for attr in

559

self.__dict__.iterkeys()

586

560

if not attr.startswith("_")]

587

561

self.client_structure.append("client_structure")

588

562

589

for name, t in inspect.getmembers(

590

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

563

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

564

lambda obj:

565

isinstance(obj,

566

property)):

591

567

if not name.startswith("_"):

592

568

self.client_structure.append(name)

593

569

635

611

# and every interval from then on.

636

612

if self.checker_initiator_tag is not None:

637

613

gobject.source_remove(self.checker_initiator_tag)

638

self.checker_initiator_tag = gobject.timeout_add(

639

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

640

self.start_checker)

614

self.checker_initiator_tag = (gobject.timeout_add

615

(self.interval_milliseconds(),

616

self.start_checker))

641

617

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

642

618

if self.disable_initiator_tag is not None:

643

619

gobject.source_remove(self.disable_initiator_tag)

644

self.disable_initiator_tag = gobject.timeout_add(

645

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

620

self.disable_initiator_tag = (gobject.timeout_add

621

(self.timeout_milliseconds(),

622

self.disable))

646

623

# Also start a new checker *right now*.

647

624

self.start_checker()

648

625

649

def checker_callback(self, source, condition, connection,

650

command):

626

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

651

627

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

652

628

self.checker_callback_tag = None

653

629

self.checker = None

654

# Read return code from connection (see call_pipe)

655

returncode = connection.recv()

656

connection.close()

657

658

if returncode >= 0:

659

self.last_checker_status = returncode

660

self.last_checker_signal = None

630

if os.WIFEXITED(condition):

631

self.last_checker_status = os.WEXITSTATUS(condition)

661

632

if self.last_checker_status == 0:

662

633

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

663

634

vars(self))

664

635

self.checked_ok()

665

636

else:

666

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

637

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

638

vars(self))

667

639

else:

668

640

self.last_checker_status = -1

669

self.last_checker_signal = -returncode

670

641

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

671

642

vars(self))

672

return False

673

643

674

644

def checked_ok(self):

675

645

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

676

646

self.last_checked_ok = datetime.datetime.utcnow()

677

647

self.last_checker_status = 0

678

self.last_checker_signal = None

679

648

self.bump_timeout()

680

649

681

650

def bump_timeout(self, timeout=None):

686

655

gobject.source_remove(self.disable_initiator_tag)

687

656

self.disable_initiator_tag = None

688

657

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

689

self.disable_initiator_tag = gobject.timeout_add(

690

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

658

self.disable_initiator_tag = (gobject.timeout_add

659

(timedelta_to_milliseconds

660

(timeout), self.disable))

691

661

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

692

662

693

663

def need_approval(self):

707

677

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

708

678

# should be.

709

679

710

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

711

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

712

self.checker.join()

713

self.checker = None

680

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

681

try:

682

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

683

except (AttributeError, OSError) as error:

684

if (isinstance(error, OSError)

685

and error.errno != errno.ECHILD):

686

raise error

687

else:

688

if pid:

689

logger.warning("Checker was a zombie")

690

gobject.source_remove(self.checker_callback_tag)

691

self.checker_callback(pid, status,

692

self.current_checker_command)

714

693

# Start a new checker if needed

715

694

if self.checker is None:

716

695

# Escape attributes for the shell

717

escaped_attrs = {

718

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

719

for attr in self.runtime_expansions }

696

escaped_attrs = dict(

697

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

698

for attr in

699

self.runtime_expansions)

720

700

try:

721

701

command = self.checker_command % escaped_attrs

722

702

except TypeError as error:

723

703

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

724

self.checker_command,

704

self.checker_command, exc_info=error)

705

return True # Try again later

706

self.current_checker_command = command

707

try:

708

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

709

command, self.name)

710

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

711

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

712

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

713

# always replaced by /dev/null.)

714

self.checker = subprocess.Popen(command,

715

close_fds=True,

716

shell=True, cwd="/")

717

except OSError as error:

718

logger.error("Failed to start subprocess",

725

719

exc_info=error)

726

return True # Try again later

727

self.current_checker_command = command

728

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

729

self.name)

730

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

731

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

732

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

733

# always replaced by /dev/null.)

734

# The exception is when not debugging but nevertheless

735

# running in the foreground; use the previously

736

# created wnull.

737

popen_args = { "close_fds": True,

738

"shell": True,

739

"cwd": "/" }

740

if (not self.server_settings["debug"]

741

and self.server_settings["foreground"]):

742

popen_args.update({"stdout": wnull,

743

"stderr": wnull })

744

pipe = multiprocessing.Pipe(duplex = False)

745

self.checker = multiprocessing.Process(

746

target = call_pipe,

747

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

748

kwargs = popen_args)

749

self.checker.start()

750

self.checker_callback_tag = gobject.io_add_watch(

751

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

752

self.checker_callback, pipe[0], command)

720

return True

721

self.checker_callback_tag = (gobject.child_watch_add

722

(self.checker.pid,

723

self.checker_callback,

724

data=command))

725

# The checker may have completed before the gobject

726

# watch was added. Check for this.

727

try:

728

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

729

except OSError as error:

730

if error.errno == errno.ECHILD:

731

# This should never happen

732

logger.error("Child process vanished",

733

exc_info=error)

734

return True

735

raise

736

if pid:

737

gobject.source_remove(self.checker_callback_tag)

738

self.checker_callback(pid, status, command)

753

739

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

754

740

return True

755

741

761

747

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

762

748

return

763

749

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

764

self.checker.terminate()

750

try:

751

self.checker.terminate()

752

#time.sleep(0.5)

753

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

754

# self.checker.kill()

755

except OSError as error:

756

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

757

raise

765

758

self.checker = None

766

759

767

760

768

def dbus_service_property(dbus_interface,

769

signature="v",

770

access="readwrite",

771

byte_arrays=False):

761

def dbus_service_property(dbus_interface, signature="v",

762

access="readwrite", byte_arrays=False):

772

763

"""Decorators for marking methods of a DBusObjectWithProperties to

773

764

become properties on the D-Bus.

774

765

783

774

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

784

775

if byte_arrays and signature != "ay":

785

776

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

786

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

787

777

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

788

778

def decorator(func):

789

779

func._dbus_is_property = True

790

780

func._dbus_interface = dbus_interface

795

785

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

796

786

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

797

787

return func

798

799

788

return decorator

800

789

801

790

810

799

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

811

800

"false"}

812

801

"""

813

814

802

def decorator(func):

815

803

func._dbus_is_interface = True

816

804

func._dbus_interface = dbus_interface

817

805

func._dbus_name = dbus_interface

818

806

return func

819

820

807

return decorator

821

808

822

809

824

811

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

825

812

Usage:

826

813

827

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

828

"org.freedesktop.DBus.Property."

829

"EmitsChangedSignal": "false"})

830

814

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

831

815

access="r")

816

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

817

"org.freedesktop.DBus.Property."

818

"EmitsChangedSignal": "false"})

832

819

def Property_dbus_property(self):

833

820

return dbus.Boolean(False)

834

821

"""

835

836

822

def decorator(func):

837

823

func._dbus_annotations = annotations

838

824

return func

839

840

825

return decorator

841

826

842

827

843

828

class DBusPropertyException(dbus.exceptions.DBusException):

844

829

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

845

830

"""

846

pass

831

def __unicode__(self):

832

return unicode(str(self))

847

833

848

834

849

835

class DBusPropertyAccessException(DBusPropertyException):

873

859

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

874

860

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

875

861

"""

876

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

862

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

877

863

False)

878

864

879

865

def _get_all_dbus_things(self, thing):

880

866

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

881

867

"""

882

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

868

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

869

name),

883

870

athing.__get__(self))

884

871

for cls in self.__class__.__mro__

885

872

for name, athing in

886

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

873

inspect.getmembers(cls,

874

self._is_dbus_thing(thing)))

887

875

888

876

def _get_dbus_property(self, interface_name, property_name):

889

877

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

890

878

property with the specified name and interface.

891

879

"""

892

for cls in self.__class__.__mro__:

893

for name, value in inspect.getmembers(

894

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

880

for cls in self.__class__.__mro__:

881

for name, value in (inspect.getmembers

882

(cls,

883

self._is_dbus_thing("property"))):

895

884

if (value._dbus_name == property_name

896

885

and value._dbus_interface == interface_name):

897

886

return value.__get__(self)

898

887

899

888

# No such property

900

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

901

self.dbus_object_path, interface_name, property_name))

889

raise DBusPropertyNotFound(self.dbus_object_path + ":"

890

+ interface_name + "."

891

+ property_name)

902

892

903

@dbus.service.method(dbus.PROPERTIES_IFACE,

904

in_signature="ss",

893

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

905

894

out_signature="v")

906

895

def Get(self, interface_name, property_name):

907

896

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

925

914

# The byte_arrays option is not supported yet on

926

915

# signatures other than "ay".

927

916

if prop._dbus_signature != "ay":

928

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

929

"'ay' signature {!r}"

930

.format(prop._dbus_signature))

917

raise ValueError

931

918

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

932

919

for byte in value))

933

920

prop(value)

934

921

935

@dbus.service.method(dbus.PROPERTIES_IFACE,

936

in_signature="s",

922

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

937

923

out_signature="a{sv}")

938

924

def GetAll(self, interface_name):

939

925

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

954

940

if not hasattr(value, "variant_level"):

955

941

properties[name] = value

956

942

continue

957

properties[name] = type(value)(

958

value, variant_level = value.variant_level + 1)

943

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

944

value.variant_level+1)

959

945

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

960

946

961

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

962

def PropertiesChanged(self, interface_name, changed_properties,

963

invalidated_properties):

964

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

965

standard.

966

"""

967

pass

968

969

947

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

970

948

out_signature="s",

971

949

path_keyword='object_path',

979

957

connection)

980

958

try:

981

959

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

982

983

960

def make_tag(document, name, prop):

984

961

e = document.createElement("property")

985

962

e.setAttribute("name", name)

986

963

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

987

964

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

988

965

return e

989

990

966

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

991

967

# Add property tags

992

968

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

1004

980

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

1005

981

and prop._dbus_interface

1006

982

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

1007

annots.update(getattr(

1008

prop, "_dbus_annotations", {}))

1009

for name, value in annots.items():

983

annots.update(getattr

984

(prop,

985

"_dbus_annotations",

986

{}))

987

for name, value in annots.iteritems():

1010

988

ann_tag = document.createElement(

1011

989

"annotation")

1012

990

ann_tag.setAttribute("name", name)

1015

993

# Add interface annotation tags

1016

994

for annotation, value in dict(

1017

995

itertools.chain.from_iterable(

1018

annotations().items()

1019

for name, annotations

1020

in self._get_all_dbus_things("interface")

996

annotations().iteritems()

997

for name, annotations in

998

self._get_all_dbus_things("interface")

1021

999

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

1022

)).items():

1000

)).iteritems():

1023

1001

ann_tag = document.createElement("annotation")

1024

1002

ann_tag.setAttribute("name", annotation)

1025

1003

ann_tag.setAttribute("value", value)

1052

1030

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

1053

1031

if dt is None:

1054

1032

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

1055

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

1033

return dbus.String(dt.isoformat(),

1034

variant_level=variant_level)

1056

1035

1057

1036

1058

1037

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1078

1057

(from DBusObjectWithProperties) and interfaces (from the

1079

1058

dbus_interface_annotations decorator).

1080

1059

"""

1081

1082

1060

def wrapper(cls):

1083

1061

for orig_interface_name, alt_interface_name in (

1084

alt_interface_names.items()):

1062

alt_interface_names.iteritems()):

1085

1063

attr = {}

1086

1064

interface_names = set()

1087

1065

# Go though all attributes of the class

1089

1067

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

1090

1068

# with the wrong interface name

1091

1069

if (not hasattr(attribute, "_dbus_interface")

1092

or not attribute._dbus_interface.startswith(

1093

orig_interface_name)):

1070

or not attribute._dbus_interface

1071

.startswith(orig_interface_name)):

1094

1072

continue

1095

1073

# Create an alternate D-Bus interface name based on

1096

1074

# the current name

1097

alt_interface = attribute._dbus_interface.replace(

1098

orig_interface_name, alt_interface_name)

1075

alt_interface = (attribute._dbus_interface

1076

.replace(orig_interface_name,

1077

alt_interface_name))

1099

1078

interface_names.add(alt_interface)

1100

1079

# Is this a D-Bus signal?

1101

1080

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

1102

if sys.version_info.major == 2:

1103

# Extract the original non-method undecorated

1104

# function by black magic

1105

nonmethod_func = (dict(

1081

# Extract the original non-method function by

1082

# black magic

1083

nonmethod_func = (dict(

1106

1084

zip(attribute.func_code.co_freevars,

1107

attribute.__closure__))

1108

["func"].cell_contents)

1109

else:

1110

nonmethod_func = attribute

1085

attribute.__closure__))["func"]

1086

.cell_contents)

1111

1087

# Create a new, but exactly alike, function

1112

1088

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

1113

1089

# with the alternate D-Bus interface name

1114

if sys.version_info.major == 2:

1115

new_function = types.FunctionType(

1116

nonmethod_func.func_code,

1117

nonmethod_func.func_globals,

1118

nonmethod_func.func_name,

1119

nonmethod_func.func_defaults,

1120

nonmethod_func.func_closure)

1121

else:

1122

new_function = types.FunctionType(

1123

nonmethod_func.__code__,

1124

nonmethod_func.__globals__,

1125

nonmethod_func.__name__,

1126

nonmethod_func.__defaults__,

1127

nonmethod_func.__closure__)

1128

new_function = (dbus.service.signal(

1129

alt_interface,

1130

attribute._dbus_signature)(new_function))

1090

new_function = (dbus.service.signal

1091

(alt_interface,

1092

attribute._dbus_signature)

1093

(types.FunctionType(

1094

nonmethod_func.func_code,

1095

nonmethod_func.func_globals,

1096

nonmethod_func.func_name,

1097

nonmethod_func.func_defaults,

1098

nonmethod_func.func_closure)))

1131

1099

# Copy annotations, if any

1132

1100

try:

1133

new_function._dbus_annotations = dict(

1134

attribute._dbus_annotations)

1101

new_function._dbus_annotations = (

1102

dict(attribute._dbus_annotations))

1135

1103

except AttributeError:

1136

1104

pass

1137

1105

# Define a creator of a function to call both the

1142

1110

"""This function is a scope container to pass

1143

1111

func1 and func2 to the "call_both" function

1144

1112

outside of its arguments"""

1145

1146

1113

def call_both(*args, **kwargs):

1147

1114

"""This function will emit two D-Bus

1148

1115

signals by calling func1 and func2"""

1149

1116

func1(*args, **kwargs)

1150

1117

func2(*args, **kwargs)

1151

1152

1118

return call_both

1153

1119

# Create the "call_both" function and add it to

1154

1120

# the class

1159

1125

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

1160

1126

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

1161

1127

# to the class.

1162

attr[attrname] = (

1163

dbus.service.method(

1164

alt_interface,

1165

attribute._dbus_in_signature,

1166

attribute._dbus_out_signature)

1167

(types.FunctionType(attribute.func_code,

1168

attribute.func_globals,

1169

attribute.func_name,

1170

attribute.func_defaults,

1171

attribute.func_closure)))

1128

attr[attrname] = (dbus.service.method

1129

(alt_interface,

1130

attribute._dbus_in_signature,

1131

attribute._dbus_out_signature)

1132

(types.FunctionType

1133

(attribute.func_code,

1134

attribute.func_globals,

1135

attribute.func_name,

1136

attribute.func_defaults,

1137

attribute.func_closure)))

1172

1138

# Copy annotations, if any

1173

1139

try:

1174

attr[attrname]._dbus_annotations = dict(

1175

attribute._dbus_annotations)

1140

attr[attrname]._dbus_annotations = (

1141

dict(attribute._dbus_annotations))

1176

1142

except AttributeError:

1177

1143

pass

1178

1144

# Is this a D-Bus property?

1181

1147

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

1182

1148

# property with the alternate D-Bus interface

1183

1149

# name. Add it to the class.

1184

attr[attrname] = (dbus_service_property(

1185

alt_interface, attribute._dbus_signature,

1186

attribute._dbus_access,

1187

attribute._dbus_get_args_options

1188

["byte_arrays"])

1189

(types.FunctionType(

1190

attribute.func_code,

1191

attribute.func_globals,

1192

attribute.func_name,

1193

attribute.func_defaults,

1194

attribute.func_closure)))

1150

attr[attrname] = (dbus_service_property

1151

(alt_interface,

1152

attribute._dbus_signature,

1153

attribute._dbus_access,

1154

attribute

1155

._dbus_get_args_options

1156

["byte_arrays"])

1157

(types.FunctionType

1158

(attribute.func_code,

1159

attribute.func_globals,

1160

attribute.func_name,

1161

attribute.func_defaults,

1162

attribute.func_closure)))

1195

1163

# Copy annotations, if any

1196

1164

try:

1197

attr[attrname]._dbus_annotations = dict(

1198

attribute._dbus_annotations)

1165

attr[attrname]._dbus_annotations = (

1166

dict(attribute._dbus_annotations))

1199

1167

except AttributeError:

1200

1168

pass

1201

1169

# Is this a D-Bus interface?

1204

1172

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

1205

1173

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

1206

1174

# to the class.

1207

attr[attrname] = (

1208

dbus_interface_annotations(alt_interface)

1209

(types.FunctionType(attribute.func_code,

1210

attribute.func_globals,

1211

attribute.func_name,

1212

attribute.func_defaults,

1213

attribute.func_closure)))

1175

attr[attrname] = (dbus_interface_annotations

1176

(alt_interface)

1177

(types.FunctionType

1178

(attribute.func_code,

1179

attribute.func_globals,

1180

attribute.func_name,

1181

attribute.func_defaults,

1182

attribute.func_closure)))

1214

1183

if deprecate:

1215

1184

# Deprecate all alternate interfaces

1216

iname="_AlternateDBusNames_interface_annotation{}"

1185

iname="_AlternateDBusNames_interface_annotation{0}"

1217

1186

for interface_name in interface_names:

1218

1219

1187

@dbus_interface_annotations(interface_name)

1220

1188

def func(self):

1221

1189

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

1222

"true" }

1190

"true" }

1223

1191

# Find an unused name

1224

1192

for aname in (iname.format(i)

1225

1193

for i in itertools.count()):

1229

1197

if interface_names:

1230

1198

# Replace the class with a new subclass of it with

1231

1199

# methods, signals, etc. as created above.

1232

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

1233

(cls, ), attr)

1200

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

1201

(cls,), attr)

1234

1202

return cls

1235

1236

1203

return wrapper

1237

1204

1238

1205

1239

1206

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

1240

"se.bsnet.fukt.Mandos"})

1207

"se.bsnet.fukt.Mandos"})

1241

1208

class ClientDBus(Client, DBusObjectWithProperties):

1242

1209

"""A Client class using D-Bus

1243

1210

1247

1214

"""

1248

1215

1249

1216

runtime_expansions = (Client.runtime_expansions

1250

+ ("dbus_object_path", ))

1251

1252

_interface = "se.recompile.Mandos.Client"

1217

+ ("dbus_object_path",))

1253

1218

1254

1219

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

1255

1220

1258

1223

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

1259

1224

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

1260

1225

# the D-Bus

1261

client_object_name = str(self.name).translate(

1226

client_object_name = unicode(self.name).translate(

1262

1227

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

1263

1228

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

1264

self.dbus_object_path = dbus.ObjectPath(

1265

"/clients/" + client_object_name)

1229

self.dbus_object_path = (dbus.ObjectPath

1230

("/clients/" + client_object_name))

1266

1231

DBusObjectWithProperties.__init__(self, self.bus,

1267

1232

self.dbus_object_path)

1268

1233

1269

def notifychangeproperty(transform_func, dbus_name,

1270

type_func=lambda x: x,

1271

variant_level=1,

1272

invalidate_only=False,

1273

_interface=_interface):

1234

def notifychangeproperty(transform_func,

1235

dbus_name, type_func=lambda x: x,

1236

variant_level=1):

1274

1237

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

1275

1238

its changes to DBus.

1276

1239

1281

1244

to the D-Bus. Default: no transform

1282

1245

variant_level: D-Bus variant level. Default: 1

1283

1246

"""

1284

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

1285

1247

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

1286

1248

def setter(self, value):

1287

1249

if hasattr(self, "dbus_object_path"):

1288

1250

if (not hasattr(self, attrname) or

1289

1251

type_func(getattr(self, attrname, None))

1290

1252

!= type_func(value)):

1291

if invalidate_only:

1292

self.PropertiesChanged(

1293

_interface, dbus.Dictionary(),

1294

dbus.Array((dbus_name, )))

1295

else:

1296

dbus_value = transform_func(

1297

type_func(value),

1298

variant_level = variant_level)

1299

self.PropertyChanged(dbus.String(dbus_name),

1300

dbus_value)

1301

self.PropertiesChanged(

1302

_interface,

1303

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

1304

dbus_value }),

1305

dbus.Array())

1253

dbus_value = transform_func(type_func(value),

1254

variant_level

1255

=variant_level)

1256

self.PropertyChanged(dbus.String(dbus_name),

1257

dbus_value)

1306

1258

setattr(self, attrname, value)

1307

1259

1308

1260

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

1314

1266

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

1315

1267

last_enabled = notifychangeproperty(datetime_to_dbus,

1316

1268

"LastEnabled")

1317

checker = notifychangeproperty(

1318

dbus.Boolean, "CheckerRunning",

1319

type_func = lambda checker: checker is not None)

1269

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

1270

type_func = lambda checker:

1271

checker is not None)

1320

1272

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1321

1273

"LastCheckedOK")

1322

1274

last_checker_status = notifychangeproperty(dbus.Int16,

1325

1277

datetime_to_dbus, "LastApprovalRequest")

1326

1278

approved_by_default = notifychangeproperty(dbus.Boolean,

1327

1279

"ApprovedByDefault")

1328

approval_delay = notifychangeproperty(

1329

dbus.UInt64, "ApprovalDelay",

1330

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

1280

approval_delay = notifychangeproperty(dbus.UInt64,

1281

"ApprovalDelay",

1282

type_func =

1283

timedelta_to_milliseconds)

1331

1284

approval_duration = notifychangeproperty(

1332

1285

dbus.UInt64, "ApprovalDuration",

1333

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

1286

type_func = timedelta_to_milliseconds)

1334

1287

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

1335

timeout = notifychangeproperty(

1336

dbus.UInt64, "Timeout",

1337

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

1288

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

1289

type_func =

1290

timedelta_to_milliseconds)

1338

1291

extended_timeout = notifychangeproperty(

1339

1292

dbus.UInt64, "ExtendedTimeout",

1340

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

1341

interval = notifychangeproperty(

1342

dbus.UInt64, "Interval",

1343

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

1293

type_func = timedelta_to_milliseconds)

1294

interval = notifychangeproperty(dbus.UInt64,

1295

"Interval",

1296

type_func =

1297

timedelta_to_milliseconds)

1344

1298

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

1345

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

1346

invalidate_only=True)

1347

1299

1348

1300

del notifychangeproperty

1349

1301

1356

1308

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

1357

1309

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

1358

1310

1359

def checker_callback(self, source, condition,

1360

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

1361

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

1362

connection, command, *args,

1363

**kwargs)

1364

exitstatus = self.last_checker_status

1365

if exitstatus >= 0:

1311

def checker_callback(self, pid, condition, command,

1312

*args, **kwargs):

1313

self.checker_callback_tag = None

1314

self.checker = None

1315

if os.WIFEXITED(condition):

1316

exitstatus = os.WEXITSTATUS(condition)

1366

1317

# Emit D-Bus signal

1367

1318

self.CheckerCompleted(dbus.Int16(exitstatus),

1368

dbus.Int64(0),

1319

dbus.Int64(condition),

1369

1320

dbus.String(command))

1370

1321

else:

1371

1322

# Emit D-Bus signal

1372

1323

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

1373

dbus.Int64(

1374

self.last_checker_signal),

1324

dbus.Int64(condition),

1375

1325

dbus.String(command))

1376

return ret

1326

1327

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

1328

*args, **kwargs)

1377

1329

1378

1330

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

1379

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

1331

old_checker = self.checker

1332

if self.checker is not None:

1333

old_checker_pid = self.checker.pid

1334

else:

1335

old_checker_pid = None

1380

1336

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

1381

1337

# Only if new checker process was started

1382

1338

if (self.checker is not None

1391

1347

1392

1348

def approve(self, value=True):

1393

1349

self.approved = value

1394

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

1395

* 1000), self._reset_approved)

1350

gobject.timeout_add(timedelta_to_milliseconds

1351

(self.approval_duration),

1352

self._reset_approved)

1396

1353

self.send_changedstate()

1397

1354

1398

1355

## D-Bus methods, signals & properties

1356

_interface = "se.recompile.Mandos.Client"

1399

1357

1400

1358

## Interfaces

1401

1359

1360

@dbus_interface_annotations(_interface)

1361

def _foo(self):

1362

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

1363

"false"}

1364

1402

1365

## Signals

1403

1366

1404

1367

# CheckerCompleted - signal

1414

1377

pass

1415

1378

1416

1379

# PropertyChanged - signal

1417

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

1418

1380

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

1419

1381

def PropertyChanged(self, property, value):

1420

1382

"D-Bus signal"

1484

1446

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

1485

1447

1486

1448

# ApprovedByDefault - property

1487

@dbus_service_property(_interface,

1488

signature="b",

1449

@dbus_service_property(_interface, signature="b",

1489

1450

access="readwrite")

1490

1451

def ApprovedByDefault_dbus_property(self, value=None):

1491

1452

if value is None: # get

1493

1454

self.approved_by_default = bool(value)

1494

1455

1495

1456

# ApprovalDelay - property

1496

@dbus_service_property(_interface,

1497

signature="t",

1457

@dbus_service_property(_interface, signature="t",

1498

1458

access="readwrite")

1499

1459

def ApprovalDelay_dbus_property(self, value=None):

1500

1460

if value is None: # get

1501

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

1502

* 1000)

1461

return dbus.UInt64(self.approval_delay_milliseconds())

1503

1462

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

1504

1463

1505

1464

# ApprovalDuration - property

1506

@dbus_service_property(_interface,

1507

signature="t",

1465

@dbus_service_property(_interface, signature="t",

1508

1466

access="readwrite")

1509

1467

def ApprovalDuration_dbus_property(self, value=None):

1510

1468

if value is None: # get

1511

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

1512

* 1000)

1469

return dbus.UInt64(timedelta_to_milliseconds(

1470

self.approval_duration))

1513

1471

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

1514

1472

1515

1473

# Name - property

1523

1481

return dbus.String(self.fingerprint)

1524

1482

1525

1483

# Host - property

1526

@dbus_service_property(_interface,

1527

signature="s",

1484

@dbus_service_property(_interface, signature="s",

1528

1485

access="readwrite")

1529

1486

def Host_dbus_property(self, value=None):

1530

1487

if value is None: # get

1531

1488

return dbus.String(self.host)

1532

self.host = str(value)

1489

self.host = unicode(value)

1533

1490

1534

1491

# Created - property

1535

1492

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

1542

1499

return datetime_to_dbus(self.last_enabled)

1543

1500

1544

1501

# Enabled - property

1545

@dbus_service_property(_interface,

1546

signature="b",

1502

@dbus_service_property(_interface, signature="b",

1547

1503

access="readwrite")

1548

1504

def Enabled_dbus_property(self, value=None):

1549

1505

if value is None: # get

1554

1510

self.disable()

1555

1511

1556

1512

# LastCheckedOK - property

1557

@dbus_service_property(_interface,

1558

signature="s",

1513

@dbus_service_property(_interface, signature="s",

1559

1514

access="readwrite")

1560

1515

def LastCheckedOK_dbus_property(self, value=None):

1561

1516

if value is not None:

1564

1519

return datetime_to_dbus(self.last_checked_ok)

1565

1520

1566

1521

# LastCheckerStatus - property

1567

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

1522

@dbus_service_property(_interface, signature="n",

1523

access="read")

1568

1524

def LastCheckerStatus_dbus_property(self):

1569

1525

return dbus.Int16(self.last_checker_status)

1570

1526

1579

1535

return datetime_to_dbus(self.last_approval_request)

1580

1536

1581

1537

# Timeout - property

1582

@dbus_service_property(_interface,

1583

signature="t",

1538

@dbus_service_property(_interface, signature="t",

1584

1539

access="readwrite")

1585

1540

def Timeout_dbus_property(self, value=None):

1586

1541

if value is None: # get

1587

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

1542

return dbus.UInt64(self.timeout_milliseconds())

1588

1543

old_timeout = self.timeout

1589

1544

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

1590

1545

# Reschedule disabling

1599

1554

is None):

1600

1555

return

1601

1556

gobject.source_remove(self.disable_initiator_tag)

1602

self.disable_initiator_tag = gobject.timeout_add(

1603

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

1604

self.disable)

1557

self.disable_initiator_tag = (

1558

gobject.timeout_add(

1559

timedelta_to_milliseconds(self.expires - now),

1560

self.disable))

1605

1561

1606

1562

# ExtendedTimeout - property

1607

@dbus_service_property(_interface,

1608

signature="t",

1563

@dbus_service_property(_interface, signature="t",

1609

1564

access="readwrite")

1610

1565

def ExtendedTimeout_dbus_property(self, value=None):

1611

1566

if value is None: # get

1612

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

1613

* 1000)

1567

return dbus.UInt64(self.extended_timeout_milliseconds())

1614

1568

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

1615

1569

1616

1570

# Interval - property

1617

@dbus_service_property(_interface,

1618

signature="t",

1571

@dbus_service_property(_interface, signature="t",

1619

1572

access="readwrite")

1620

1573

def Interval_dbus_property(self, value=None):

1621

1574

if value is None: # get

1622

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

1575

return dbus.UInt64(self.interval_milliseconds())

1623

1576

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

1624

1577

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

1625

1578

return

1626

1579

if self.enabled:

1627

1580

# Reschedule checker run

1628

1581

gobject.source_remove(self.checker_initiator_tag)

1629

self.checker_initiator_tag = gobject.timeout_add(

1630

value, self.start_checker)

1631

self.start_checker() # Start one now, too

1582

self.checker_initiator_tag = (gobject.timeout_add

1583

(value, self.start_checker))

1584

self.start_checker() # Start one now, too

1632

1585

1633

1586

# Checker - property

1634

@dbus_service_property(_interface,

1635

signature="s",

1587

@dbus_service_property(_interface, signature="s",

1636

1588

access="readwrite")

1637

1589

def Checker_dbus_property(self, value=None):

1638

1590

if value is None: # get

1639

1591

return dbus.String(self.checker_command)

1640

self.checker_command = str(value)

1592

self.checker_command = unicode(value)

1641

1593

1642

1594

# CheckerRunning - property

1643

@dbus_service_property(_interface,

1644

signature="b",

1595

@dbus_service_property(_interface, signature="b",

1645

1596

access="readwrite")

1646

1597

def CheckerRunning_dbus_property(self, value=None):

1647

1598

if value is None: # get

1657

1608

return self.dbus_object_path # is already a dbus.ObjectPath

1658

1609

1659

1610

# Secret = property

1660

@dbus_service_property(_interface,

1661

signature="ay",

1662

access="write",

1663

byte_arrays=True)

1611

@dbus_service_property(_interface, signature="ay",

1612

access="write", byte_arrays=True)

1664

1613

def Secret_dbus_property(self, value):

1665

self.secret = bytes(value)

1614

self.secret = str(value)

1666

1615

1667

1616

del _interface

1668

1617

1672

1621

self._pipe = child_pipe

1673

1622

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

1674

1623

if not self._pipe.recv():

1675

raise KeyError(fpr)

1624

raise KeyError()

1676

1625

1677

1626

def __getattribute__(self, name):

1678

1627

if name == '_pipe':

1682

1631

if data[0] == 'data':

1683

1632

return data[1]

1684

1633

if data[0] == 'function':

1685

1686

1634

def func(*args, **kwargs):

1687

1635

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

1688

1636

return self._pipe.recv()[1]

1689

1690

1637

return func

1691

1638

1692

1639

def __setattr__(self, name, value):

1704

1651

def handle(self):

1705

1652

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

1706

1653

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

1707

str(self.client_address))

1654

unicode(self.client_address))

1708

1655

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

1709

1656

self.server.child_pipe.fileno())

1710

1657

1711

session = gnutls.connection.ClientSession(

1712

self.request, gnutls.connection .X509Credentials())

1658

session = (gnutls.connection

1659

.ClientSession(self.request,

1660

gnutls.connection

1661

.X509Credentials()))

1713

1662

1714

1663

# Note: gnutls.connection.X509Credentials is really a

1715

1664

# generic GnuTLS certificate credentials object so long as

1724

1673

priority = self.server.gnutls_priority

1725

1674

if priority is None:

1726

1675

priority = "NORMAL"

1727

gnutls.library.functions.gnutls_priority_set_direct(

1728

session._c_object, priority, None)

1676

(gnutls.library.functions

1677

.gnutls_priority_set_direct(session._c_object,

1678

priority, None))

1729

1679

1730

1680

# Start communication using the Mandos protocol

1731

1681

# Get protocol number

1733

1683

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

1734

1684

try:

1735

1685

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

1736

raise RuntimeError(line)

1686

raise RuntimeError

1737

1687

except (ValueError, IndexError, RuntimeError) as error:

1738

1688

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

1739

1689

return

1751

1701

approval_required = False

1752

1702

try:

1753

1703

try:

1754

fpr = self.fingerprint(

1755

self.peer_certificate(session))

1704

fpr = self.fingerprint(self.peer_certificate

1705

(session))

1756

1706

except (TypeError,

1757

1707

gnutls.errors.GNUTLSError) as error:

1758

1708

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

1773

1723

while True:

1774

1724

if not client.enabled:

1775

1725

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

1776

client.name)

1726

client.name)

1777

1727

if self.server.use_dbus:

1778

1728

# Emit D-Bus signal

1779

1729

client.Rejected("Disabled")

1788

1738

if self.server.use_dbus:

1789

1739

# Emit D-Bus signal

1790

1740

client.NeedApproval(

1791

client.approval_delay.total_seconds()

1792

* 1000, client.approved_by_default)

1741

client.approval_delay_milliseconds(),

1742

client.approved_by_default)

1793

1743

else:

1794

1744

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

1795

1745

client.name)

1801

1751

#wait until timeout or approved

1802

1752

time = datetime.datetime.now()

1803

1753

client.changedstate.acquire()

1804

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

1754

client.changedstate.wait(

1755

float(timedelta_to_milliseconds(delay)

1756

/ 1000))

1805

1757

client.changedstate.release()

1806

1758

time2 = datetime.datetime.now()

1807

1759

if (time2 - time) >= delay:

1826

1778

logger.warning("gnutls send failed",

1827

1779

exc_info=error)

1828

1780

return

1829

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

1830

len(client.secret) - (sent_size

1831

+ sent))

1781

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

1782

sent, len(client.secret)

1783

- (sent_size + sent))

1832

1784

sent_size += sent

1833

1785

1834

1786

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

1851

1803

def peer_certificate(session):

1852

1804

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

1853

1805

# If not an OpenPGP certificate...

1854

if (gnutls.library.functions.gnutls_certificate_type_get(

1855

session._c_object)

1806

if (gnutls.library.functions

1807

.gnutls_certificate_type_get(session._c_object)

1856

1808

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1857

1809

# ...do the normal thing

1858

1810

return session.peer_certificate

1872

1824

def fingerprint(openpgp):

1873

1825

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1874

1826

# New GnuTLS "datum" with the OpenPGP public key

1875

datum = gnutls.library.types.gnutls_datum_t(

1876

ctypes.cast(ctypes.c_char_p(openpgp),

1877

ctypes.POINTER(ctypes.c_ubyte)),

1878

ctypes.c_uint(len(openpgp)))

1827

datum = (gnutls.library.types

1828

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

1829

ctypes.POINTER

1830

(ctypes.c_ubyte)),

1831

ctypes.c_uint(len(openpgp))))

1879

1832

# New empty GnuTLS certificate

1880

1833

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1881

gnutls.library.functions.gnutls_openpgp_crt_init(

1882

ctypes.byref(crt))

1834

(gnutls.library.functions

1835

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

1883

1836

# Import the OpenPGP public key into the certificate

1884

gnutls.library.functions.gnutls_openpgp_crt_import(

1885

crt, ctypes.byref(datum),

1886

gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)

1837

(gnutls.library.functions

1838

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

1839

gnutls.library.constants

1840

.GNUTLS_OPENPGP_FMT_RAW))

1887

1841

# Verify the self signature in the key

1888

1842

crtverify = ctypes.c_uint()

1889

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

1890

crt, 0, ctypes.byref(crtverify))

1843

(gnutls.library.functions

1844

.gnutls_openpgp_crt_verify_self(crt, 0,

1845

ctypes.byref(crtverify)))

1891

1846

if crtverify.value != 0:

1892

1847

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1893

raise gnutls.errors.CertificateSecurityError(

1894

"Verify failed")

1848

raise (gnutls.errors.CertificateSecurityError

1849

("Verify failed"))

1895

1850

# New buffer for the fingerprint

1896

1851

buf = ctypes.create_string_buffer(20)

1897

1852

buf_len = ctypes.c_size_t()

1898

1853

# Get the fingerprint from the certificate into the buffer

1899

gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(

1900

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

1854

(gnutls.library.functions

1855

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

1856

ctypes.byref(buf_len)))

1901

1857

# Deinit the certificate

1902

1858

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1903

1859

# Convert the buffer to a Python bytestring

1909

1865

1910

1866

class MultiprocessingMixIn(object):

1911

1867

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

1912

1913

1868

def sub_process_main(self, request, address):

1914

1869

try:

1915

1870

self.finish_request(request, address)

1927

1882

1928

1883

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1929

1884

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

1930

1931

1885

def process_request(self, request, client_address):

1932

1886

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

1933

1887

1942

1896

1943

1897

def add_pipe(self, parent_pipe, proc):

1944

1898

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

1945

raise NotImplementedError()

1899

raise NotImplementedError

1946

1900

1947

1901

1948

1902

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1954

1908

interface: None or a network interface name (string)

1955

1909

use_ipv6: Boolean; to use IPv6 or not

1956

1910

"""

1957

1958

1911

def __init__(self, server_address, RequestHandlerClass,

1959

interface=None,

1960

use_ipv6=True,

1961

socketfd=None):

1912

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

1962

1913

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

1963

1914

creating a new one with socket.socket().

1964

1915

"""

2005

1956

self.interface)

2006

1957

else:

2007

1958

try:

2008

self.socket.setsockopt(

2009

socket.SOL_SOCKET, SO_BINDTODEVICE,

2010

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

1959

self.socket.setsockopt(socket.SOL_SOCKET,

1960

SO_BINDTODEVICE,

1961

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

2011

1962

except socket.error as error:

2012

1963

if error.errno == errno.EPERM:

2013

1964

logger.error("No permission to bind to"

2027

1978

if self.address_family == socket.AF_INET6:

2028

1979

any_address = "::" # in6addr_any

2029

1980

else:

2030

any_address = "0.0.0.0" # INADDR_ANY

1981

any_address = socket.INADDR_ANY

2031

1982

self.server_address = (any_address,

2032

1983

self.server_address[1])

2033

1984

elif not self.server_address[1]:

2034

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

1985

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

1986

0)

2035

1987

# if self.interface:

2036

1988

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

2037

1989

# 0, # port

2051

2003

2052

2004

Assumes a gobject.MainLoop event loop.

2053

2005

"""

2054

2055

2006

def __init__(self, server_address, RequestHandlerClass,

2056

interface=None,

2057

use_ipv6=True,

2058

clients=None,

2059

gnutls_priority=None,

2060

use_dbus=True,

2061

socketfd=None):

2007

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

2008

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

2062

2009

self.enabled = False

2063

2010

self.clients = clients

2064

2011

if self.clients is None:

2070

2017

interface = interface,

2071

2018

use_ipv6 = use_ipv6,

2072

2019

socketfd = socketfd)

2073

2074

2020

def server_activate(self):

2075

2021

if self.enabled:

2076

2022

return socketserver.TCPServer.server_activate(self)

2080

2026

2081

2027

def add_pipe(self, parent_pipe, proc):

2082

2028

# Call "handle_ipc" for both data and EOF events

2083

gobject.io_add_watch(

2084

parent_pipe.fileno(),

2085

gobject.IO_IN | gobject.IO_HUP,

2086

functools.partial(self.handle_ipc,

2087

parent_pipe = parent_pipe,

2088

proc = proc))

2029

gobject.io_add_watch(parent_pipe.fileno(),

2030

gobject.IO_IN | gobject.IO_HUP,

2031

functools.partial(self.handle_ipc,

2032

parent_pipe =

2033

parent_pipe,

2034

proc = proc))

2089

2035

2090

def handle_ipc(self, source, condition,

2091

parent_pipe=None,

2092

proc = None,

2093

client_object=None):

2036

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

2037

proc = None, client_object=None):

2094

2038

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

2095

2039

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

2096

2040

# Wait for other process to exit

2119

2063

parent_pipe.send(False)

2120

2064

return False

2121

2065

2122

gobject.io_add_watch(

2123

parent_pipe.fileno(),

2124

gobject.IO_IN | gobject.IO_HUP,

2125

functools.partial(self.handle_ipc,

2126

parent_pipe = parent_pipe,

2127

proc = proc,

2128

client_object = client))

2066

gobject.io_add_watch(parent_pipe.fileno(),

2067

gobject.IO_IN | gobject.IO_HUP,

2068

functools.partial(self.handle_ipc,

2069

parent_pipe =

2070

parent_pipe,

2071

proc = proc,

2072

client_object =

2073

client))

2129

2074

parent_pipe.send(True)

2130

2075

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

2131

2076

# same fileno

2137

2082

2138

2083

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

2139

2084

funcname)(*args,

2140

**kwargs)))

2085

**kwargs)))

2141

2086

2142

2087

if command == 'getattr':

2143

2088

attrname = request[1]

2144

if isinstance(client_object.__getattribute__(attrname),

2145

collections.Callable):

2146

parent_pipe.send(('function', ))

2089

if callable(client_object.__getattribute__(attrname)):

2090

parent_pipe.send(('function',))

2147

2091

else:

2148

parent_pipe.send((

2149

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

2092

parent_pipe.send(('data', client_object

2093

.__getattribute__(attrname)))

2150

2094

2151

2095

if command == 'setattr':

2152

2096

attrname = request[1]

2183

2127

# avoid excessive use of external libraries.

2184

2128

2185

2129

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

2186

Token = collections.namedtuple("Token", (

2187

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

2188

# a "group" containing digits

2189

"value", # datetime.timedelta or None

2190

"followers")) # Tokens valid after this token

2130

Token = collections.namedtuple("Token",

2131

("regexp", # To match token; if

2132

# "value" is not None,

2133

# must have a "group"

2134

# containing digits

2135

"value", # datetime.timedelta or

2136

# None

2137

"followers")) # Tokens valid after

2138

# this token

2191

2139

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

2192

2140

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

2193

2141

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

2194

2142

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

2195

2143

datetime.timedelta(seconds=1),

2196

frozenset((token_end, )))

2144

frozenset((token_end,)))

2197

2145

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

2198

2146

datetime.timedelta(minutes=1),

2199

2147

frozenset((token_second, token_end)))

2215

2163

frozenset((token_month, token_end)))

2216

2164

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

2217

2165

datetime.timedelta(weeks=1),

2218

frozenset((token_end, )))

2166

frozenset((token_end,)))

2219

2167

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

2220

2168

frozenset((token_year, token_month,

2221

2169

token_day, token_time,

2222

token_week)))

2170

token_week))),

2223

2171

# Define starting values

2224

2172

value = datetime.timedelta() # Value so far

2225

2173

found_token = None

2226

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

2174

followers = frozenset(token_duration,) # Following valid tokens

2227

2175

s = duration # String left to parse

2228

2176

# Loop until end token is found

2229

2177

while found_token is not token_end:

2246

2194

break

2247

2195

else:

2248

2196

# No currently valid tokens were found

2249

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

2250

.format(duration))

2197

raise ValueError("Invalid RFC 3339 duration")

2251

2198

# End token found

2252

2199

return value

2253

2200

2277

2224

timevalue = datetime.timedelta(0)

2278

2225

for s in interval.split():

2279

2226

try:

2280

suffix = s[-1]

2227

suffix = unicode(s[-1])

2281

2228

value = int(s[:-1])

2282

2229

if suffix == "d":

2283

2230

delta = datetime.timedelta(value)

2290

2237

elif suffix == "w":

2291

2238

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

2292

2239

else:

2293

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

2294

except IndexError as e:

2240

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

2241

.format(suffix))

2242

except (ValueError, IndexError) as e:

2295

2243

raise ValueError(*(e.args))

2296

2244

timevalue += delta

2297

2245

return timevalue

2313

2261

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

2314

2262

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

2315

2263

raise OSError(errno.ENODEV,

2316

"{} not a character device"

2264

"{0} not a character device"

2317

2265

.format(os.devnull))

2318

2266

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

2319

2267

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

2329

2277

2330

2278

parser = argparse.ArgumentParser()

2331

2279

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

2332

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

2280

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

2333

2281

help="show version number and exit")

2334

2282

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

2335

2283

help="Bind to interface IF")

2341

2289

help="Run self-test")

2342

2290

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

2343

2291

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

2344

" to terminal", default=None)

2292

" to terminal")

2345

2293

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

2346

2294

help="Debug level for stdout output")

2347

2295

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

2354

2302

" files")

2355

2303

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

2356

2304

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

2357

" system bus interface", default=None)

2305

" system bus interface")

2358

2306

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

2359

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

2360

default=None)

2307

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

2361

2308

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

2362

2309

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

2363

" state", default=None)

2310

" state")

2364

2311

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

2365

2312

help="Specify a file descriptor to a network"

2366

2313

" socket to use instead of creating one")

2367

2314

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

2368

2315

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

2369

2316

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

2370

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

2371

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

2372

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

2373

default=None)

2317

help="Run in foreground")

2374

2318

2375

2319

options = parser.parse_args()

2376

2320

2377

2321

if options.check:

2378

2322

import doctest

2379

fail_count, test_count = doctest.testmod()

2380

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

2323

doctest.testmod()

2324

sys.exit()

2381

2325

2382

2326

# Default values for config file for server-global settings

2383

2327

server_defaults = { "interface": "",

2385

2329

"port": "",

2386

2330

"debug": "False",

2387

2331

"priority":

2388

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

2389

":+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",

2332

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

2390

2333

"servicename": "Mandos",

2391

2334

"use_dbus": "True",

2392

2335

"use_ipv6": "True",

2395

2338

"socket": "",

2396

2339

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

2397

2340

"foreground": "False",

2398

"zeroconf": "True",

2399

}

2341

}

2400

2342

2401

2343

# Parse config file for server-global settings

2402

2344

server_config = configparser.SafeConfigParser(server_defaults)

2403

2345

del server_defaults

2404

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

2346

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

2347

"mandos.conf"))

2405

2348

# Convert the SafeConfigParser object to a dict

2406

2349

server_settings = server_config.defaults()

2407

2350

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

2425

2368

# Override the settings from the config file with command line

2426

2369

# options, if set.

2427

2370

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

2428

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

2429

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

2430

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

2371

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

2372

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

2373

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

2431

2374

value = getattr(options, option)

2432

2375

if value is not None:

2433

2376

server_settings[option] = value

2434

2377

del options

2435

2378

# Force all strings to be unicode

2436

2379

for option in server_settings.keys():

2437

if isinstance(server_settings[option], bytes):

2438

server_settings[option] = (server_settings[option]

2439

.decode("utf-8"))

2440

# Force all boolean options to be boolean

2441

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

2442

"foreground", "zeroconf"):

2443

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

2380

if type(server_settings[option]) is str:

2381

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

2444

2382

# Debug implies foreground

2445

2383

if server_settings["debug"]:

2446

2384

server_settings["foreground"] = True

2448

2386

2449

2387

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

2450

2388

2451

if (not server_settings["zeroconf"]

2452

and not (server_settings["port"]

2453

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

2454

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

2455

2456

2389

# For convenience

2457

2390

debug = server_settings["debug"]

2458

2391

debuglevel = server_settings["debuglevel"]

2461

2394

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

2462

2395

stored_state_file)

2463

2396

foreground = server_settings["foreground"]

2464

zeroconf = server_settings["zeroconf"]

2465

2397

2466

2398

if debug:

2467

2399

initlogger(debug, logging.DEBUG)

2473

2405

initlogger(debug, level)

2474

2406

2475

2407

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

2476

syslogger.setFormatter(

2477

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

2478

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

2479

server_settings["servicename"])))

2408

syslogger.setFormatter(logging.Formatter

2409

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

2410

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

2411

.format(server_settings

2412

["servicename"])))

2480

2413

2481

2414

# Parse config file with clients

2482

2415

client_config = configparser.SafeConfigParser(Client

2487

2420

global mandos_dbus_service

2488

2421

mandos_dbus_service = None

2489

2422

2490

socketfd = None

2491

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

2492

socketfd = server_settings["socket"]

2493

tcp_server = MandosServer(

2494

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

2495

ClientHandler,

2496

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

2497

use_ipv6=use_ipv6,

2498

gnutls_priority=server_settings["priority"],

2499

use_dbus=use_dbus,

2500

socketfd=socketfd)

2423

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

2424

server_settings["port"]),

2425

ClientHandler,

2426

interface=(server_settings["interface"]

2427

or None),

2428

use_ipv6=use_ipv6,

2429

gnutls_priority=

2430

server_settings["priority"],

2431

use_dbus=use_dbus,

2432

socketfd=(server_settings["socket"]

2433

or None))

2501

2434

if not foreground:

2502

pidfilename = "/run/mandos.pid"

2503

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

2504

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

2435

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

2505

2436

pidfile = None

2506

2437

try:

2507

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

2438

pidfile = open(pidfilename, "w")

2508

2439

except IOError as e:

2509

2440

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

2510

2441

exc_info=e)

2524

2455

os.setuid(uid)

2525

2456

except OSError as error:

2526

2457

if error.errno != errno.EPERM:

2527

raise

2458

raise error

2528

2459

2529

2460

if debug:

2530

2461

# Enable all possible GnuTLS debugging

2537

2468

def debug_gnutls(level, string):

2538

2469

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

2539

2470

2540

gnutls.library.functions.gnutls_global_set_log_function(

2541

debug_gnutls)

2471

(gnutls.library.functions

2472

.gnutls_global_set_log_function(debug_gnutls))

2542

2473

2543

2474

# Redirect stdin so all checkers get /dev/null

2544

2475

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

2564

2495

if use_dbus:

2565

2496

try:

2566

2497

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

2567

bus,

2568

do_not_queue=True)

2569

old_bus_name = dbus.service.BusName(

2570

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

2571

do_not_queue=True)

2572

except dbus.exceptions.DBusException as e:

2498

bus, do_not_queue=True)

2499

old_bus_name = (dbus.service.BusName

2500

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

2501

do_not_queue=True))

2502

except dbus.exceptions.NameExistsException as e:

2573

2503

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

2574

2504

use_dbus = False

2575

2505

server_settings["use_dbus"] = False

2576

2506

tcp_server.use_dbus = False

2577

if zeroconf:

2578

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2579

service = AvahiServiceToSyslog(

2580

name = server_settings["servicename"],

2581

servicetype = "_mandos._tcp",

2582

protocol = protocol,

2583

bus = bus)

2584

if server_settings["interface"]:

2585

service.interface = if_nametoindex(

2586

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

2507

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2508

service = AvahiServiceToSyslog(name =

2509

server_settings["servicename"],

2510

servicetype = "_mandos._tcp",

2511

protocol = protocol, bus = bus)

2512

if server_settings["interface"]:

2513

service.interface = (if_nametoindex

2514

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

2587

2515

2588

2516

global multiprocessing_manager

2589

2517

multiprocessing_manager = multiprocessing.Manager()

2596

2524

old_client_settings = {}

2597

2525

clients_data = {}

2598

2526

2599

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

2600

global wnull

2601

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

2602

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

2603

# mode

2604

if debug or not foreground:

2605

wnull.close()

2606

2607

2527

# Get client data and settings from last running state.

2608

2528

if server_settings["restore"]:

2609

2529

try:

2610

2530

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

2611

clients_data, old_client_settings = pickle.load(

2612

stored_state)

2531

clients_data, old_client_settings = (pickle.load

2532

(stored_state))

2613

2533

os.remove(stored_state_path)

2614

2534

except IOError as e:

2615

2535

if e.errno == errno.ENOENT:

2616

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

2617

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

2536

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

2537

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

2618

2538

else:

2619

2539

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

2620

2540

exc_info=e)

2621

2541

raise

2622

2542

except EOFError as e:

2623

2543

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

2624

"EOFError:",

2625

exc_info=e)

2544

"EOFError:", exc_info=e)

2626

2545

2627

2546

with PGPEngine() as pgp:

2628

for client_name, client in clients_data.items():

2629

# Skip removed clients

2630

if client_name not in client_settings:

2631

continue

2632

2547

for client_name, client in clients_data.iteritems():

2633

2548

# Decide which value to use after restoring saved state.

2634

2549

# We have three different values: Old config file,

2635

2550

# new config file, and saved state.

2640

2555

# For each value in new config, check if it

2641

2556

# differs from the old config value (Except for

2642

2557

# the "secret" attribute)

2643

if (name != "secret"

2644

and (value !=

2645

old_client_settings[client_name][name])):

2558

if (name != "secret" and

2559

value != old_client_settings[client_name]

2560

[name]):

2646

2561

client[name] = value

2647

2562

except KeyError:

2648

2563

pass

2649

2564

2650

2565

# Clients who has passed its expire date can still be

2651

# enabled if its last checker was successful. A Client

2566

# enabled if its last checker was successful. Clients

2652

2567

# whose checker succeeded before we stored its state is

2653

2568

# assumed to have successfully run all checkers during

2654

2569

# downtime.

2656

2571

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

2657

2572

if not client["last_checked_ok"]:

2658

2573

logger.warning(

2659

"disabling client {} - Client never "

2660

"performed a successful checker".format(

2661

client_name))

2574

"disabling client {0} - Client never "

2575

"performed a successful checker"

2576

.format(client_name))

2662

2577

client["enabled"] = False

2663

2578

elif client["last_checker_status"] != 0:

2664

2579

logger.warning(

2665

"disabling client {} - Client last"

2666

" checker failed with error code"

2667

" {}".format(

2668

client_name,

2669

client["last_checker_status"]))

2580

"disabling client {0} - Client "

2581

"last checker failed with error code {1}"

2582

.format(client_name,

2583

client["last_checker_status"]))

2670

2584

client["enabled"] = False

2671

2585

else:

2672

client["expires"] = (

2673

datetime.datetime.utcnow()

2674

+ client["timeout"])

2586

client["expires"] = (datetime.datetime

2587

.utcnow()

2588

+ client["timeout"])

2675

2589

logger.debug("Last checker succeeded,"

2676

" keeping {} enabled".format(

2677

client_name))

2590

" keeping {0} enabled"

2591

.format(client_name))

2678

2592

try:

2679

client["secret"] = pgp.decrypt(

2680

client["encrypted_secret"],

2681

client_settings[client_name]["secret"])

2593

client["secret"] = (

2594

pgp.decrypt(client["encrypted_secret"],

2595

client_settings[client_name]

2596

["secret"]))

2682

2597

except PGPError:

2683

2598

# If decryption fails, we use secret from new settings

2684

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

2685

client_name))

2686

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

2687

["secret"])

2599

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

2600

.format(client_name))

2601

client["secret"] = (

2602

client_settings[client_name]["secret"])

2688

2603

2689

2604

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

2690

2605

for client_name in (set(old_client_settings)

2695

2610

clients_data[client_name] = client_settings[client_name]

2696

2611

2697

2612

# Create all client objects

2698

for client_name, client in clients_data.items():

2613

for client_name, client in clients_data.iteritems():

2699

2614

tcp_server.clients[client_name] = client_class(

2700

name = client_name,

2701

settings = client,

2702

server_settings = server_settings)

2615

name = client_name, settings = client)

2703

2616

2704

2617

if not tcp_server.clients:

2705

2618

logger.warning("No clients defined")

2706

2619

2707

2620

if not foreground:

2708

2621

if pidfile is not None:

2709

pid = os.getpid()

2710

2622

try:

2711

2623

with pidfile:

2712

print(pid, file=pidfile)

2624

pid = os.getpid()

2625

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

2713

2626

except IOError:

2714

2627

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

2715

2628

pidfilename, pid)

2720

2633

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

2721

2634

2722

2635

if use_dbus:

2723

2724

@alternate_dbus_interfaces(

2725

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

2636

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

2637

"se.bsnet.fukt.Mandos"})

2726

2638

class MandosDBusService(DBusObjectWithProperties):

2727

2639

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

2728

2729

2640

def __init__(self):

2730

2641

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

2731

2732

2642

_interface = "se.recompile.Mandos"

2733

2643

2734

2644

@dbus_interface_annotations(_interface)

2735

2645

def _foo(self):

2736

return {

2737

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

2738

"false" }

2646

return { "org.freedesktop.DBus.Property"

2647

".EmitsChangedSignal":

2648

"false"}

2739

2649

2740

2650

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

2741

2651

def ClientAdded(self, objpath):

2755

2665

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

2756

2666

def GetAllClients(self):

2757

2667

"D-Bus method"

2758

return dbus.Array(c.dbus_object_path for c in

2668

return dbus.Array(c.dbus_object_path

2669

for c in

2759

2670

tcp_server.clients.itervalues())

2760

2671

2761

2672

@dbus.service.method(_interface,

2763

2674

def GetAllClientsWithProperties(self):

2764

2675

"D-Bus method"

2765

2676

return dbus.Dictionary(

2766

{ c.dbus_object_path: c.GetAll("")

2767

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

2677

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

2678

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

2768

2679

signature="oa{sv}")

2769

2680

2770

2681

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

2787

2698

2788

2699

def cleanup():

2789

2700

"Cleanup function; run on exit"

2790

if zeroconf:

2791

service.cleanup()

2701

service.cleanup()

2792

2702

2793

2703

multiprocessing.active_children()

2794

wnull.close()

2795

2704

if not (tcp_server.clients or client_settings):

2796

2705

return

2797

2706

2808

2717

2809

2718

# A list of attributes that can not be pickled

2810

2719

# + secret.

2811

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

2812

"checker", "server_settings" }

2813

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

2814

.Object):

2720

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

2721

"checker"))

2722

for name, typ in (inspect.getmembers

2723

(dbus.service.Object)):

2815

2724

exclude.add(name)

2816

2725

2817

2726

client_dict["encrypted_secret"] = (client

2824

2733

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

2825

2734

2826

2735

try:

2827

with tempfile.NamedTemporaryFile(

2828

mode='wb',

2829

suffix=".pickle",

2830

prefix='clients-',

2831

dir=os.path.dirname(stored_state_path),

2832

delete=False) as stored_state:

2736

with (tempfile.NamedTemporaryFile

2737

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

2738

dir=os.path.dirname(stored_state_path),

2739

delete=False)) as stored_state:

2833

2740

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

2834

tempname = stored_state.name

2741

tempname=stored_state.name

2835

2742

os.rename(tempname, stored_state_path)

2836

2743

except (IOError, OSError) as e:

2837

2744

if not debug:

2840

2747

except NameError:

2841

2748

pass

2842

2749

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

2843

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

2750

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

2844

2751

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

2845

2752

else:

2846

2753

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

2847

2754

exc_info=e)

2848

raise

2755

raise e

2849

2756

2850

2757

# Delete all clients, and settings from config

2851

2758

while tcp_server.clients:

2856

2763

client.disable(quiet=True)

2857

2764

if use_dbus:

2858

2765

# Emit D-Bus signal

2859

mandos_dbus_service.ClientRemoved(

2860

client.dbus_object_path, client.name)

2766

mandos_dbus_service.ClientRemoved(client

2767

.dbus_object_path,

2768

client.name)

2861

2769

client_settings.clear()

2862

2770

2863

2771

atexit.register(cleanup)

2874

2782

tcp_server.server_activate()

2875

2783

2876

2784

# Find out what port we got

2877

if zeroconf:

2878

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

2785

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

2879

2786

if use_ipv6:

2880

2787

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

2881

2788

" flowinfo %d, scope_id %d",

2887

2794

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

2888

2795

2889

2796

try:

2890

if zeroconf:

2891

# From the Avahi example code

2892

try:

2893

service.activate()

2894

except dbus.exceptions.DBusException as error:

2895

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

2896

cleanup()

2897

sys.exit(1)

2898

# End of Avahi example code

2797

# From the Avahi example code

2798

try:

2799

service.activate()

2800

except dbus.exceptions.DBusException as error:

2801

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

2802

cleanup()

2803

sys.exit(1)

2804

# End of Avahi example code

2899

2805

2900

2806

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

2901

2807

lambda *args, **kwargs:

2916

2822

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

2917

2823

cleanup()

2918

2824

2919

2920

2825

if __name__ == '__main__':

2921

2826

main()