/mandos/trunk : revision 752

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#!/usr/bin/python

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#!/usr/bin/python2.7

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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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import SocketServer as socketserver

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try:

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import SocketServer as socketserver

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except ImportError:

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import socketserver

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import socket

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import argparse

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import datetime

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import gnutls.library.functions

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import gnutls.library.constants

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import gnutls.library.types

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import ConfigParser as configparser

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try:

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import ConfigParser as configparser

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except ImportError:

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import configparser

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import sys

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import re

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import os

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import struct

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import fcntl

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import functools

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import cPickle as pickle

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try:

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import cPickle as pickle

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except ImportError:

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import pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import collections

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import codecs

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import dbus

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import dbus.service

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import gobject

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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 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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version = "1.6.0"

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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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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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syslogger = None

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try:

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.if_nametoindex)

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if_nametoindex = ctypes.cdll.LoadLibrary(

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

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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interface))

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

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ifreq[16:20])[0]

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

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

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return interface_index

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

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"""init logger and add loglevel"""

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global syslogger

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syslogger = (logging.handlers.SysLogHandler(

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facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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address = "/dev/log"))

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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class PGPEngine(object):

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

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def __init__(self):

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self.gnupg = GnuPGInterface.GnuPG()

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

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self.gnupg = GnuPGInterface.GnuPG()

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self.gnupg.options.meta_interactive = False

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self.gnupg.options.homedir = self.tempdir

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

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'--quiet',

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'--no-use-agent'])

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

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

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if len(encoded) > 2048:

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

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

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

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

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return encoded

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def encrypt(self, data, password):

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

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

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try:

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

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

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attach_fhs={'stderr': devnull})

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

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f.write(data)

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

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ciphertext = f.read()

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proc.wait()

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except IOError as e:

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raise PGPError(e)

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self.gnupg.passphrase = None

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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return ciphertext

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def decrypt(self, data, password):

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

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

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try:

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proc = self.gnupg.run(['--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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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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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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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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return super(AvahiError, self).__init__(value, *args,

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**kwargs)

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

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

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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, 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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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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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):

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def rename(self, remove=True):

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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 = unicode(self.server

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.GetAlternativeServiceName(self.name))

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

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self.name)

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self.remove()

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if 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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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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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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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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unicode(error))

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

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.format(error))

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str(error))

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raise AvahiGroupError("State changed: {!s}".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 = { 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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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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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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self.server.connect_to_signal("StateChanged",

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self.server_state_changed)

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self.server_state_changed)

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

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class AvahiServiceToSyslog(AvahiService):

384

def rename(self):

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

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

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ret = AvahiService.rename(self)

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syslogger.setFormatter(logging.Formatter

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

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

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.format(self.name)))

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

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syslogger.setFormatter(logging.Formatter(

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

424

.format(self.name)))

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return ret

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def timedelta_to_milliseconds(td):

395

"Convert a datetime.timedelta() to milliseconds"

396

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

397

+ (td.seconds * 1000)

398

+ (td.microseconds // 1000))

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class Client(object):

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

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430

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466

runtime_expansions: Allowed attributes for runtime expansion.

440

467

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

441

468

disabled, or None

469

server_settings: The server_settings dict from main()

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470

"""

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runtime_expansions = ("approval_delay", "approval_duration",

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

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475

"last_approval_request", "last_checked_ok",

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476

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

449

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

450

"extended_timeout": "15m",

451

"interval": "2m",

452

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

453

"host": "",

454

"approval_delay": "0s",

455

"approval_duration": "1s",

456

"approved_by_default": "True",

457

"enabled": "True",

458

}

459

460

def timeout_milliseconds(self):

461

"Return the 'timeout' attribute in milliseconds"

462

return timedelta_to_milliseconds(self.timeout)

463

464

def extended_timeout_milliseconds(self):

465

"Return the 'extended_timeout' attribute in milliseconds"

466

return timedelta_to_milliseconds(self.extended_timeout)

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468

def interval_milliseconds(self):

469

"Return the 'interval' attribute in milliseconds"

470

return timedelta_to_milliseconds(self.interval)

471

472

def approval_delay_milliseconds(self):

473

return timedelta_to_milliseconds(self.approval_delay)

477

client_defaults = {

478

"timeout": "PT5M",

479

"extended_timeout": "PT15M",

480

"interval": "PT2M",

481

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

482

"host": "",

483

"approval_delay": "PT0S",

484

"approval_duration": "PT1S",

485

"approved_by_default": "True",

486

"enabled": "True",

487

}

474

488

475

489

@staticmethod

476

490

def config_parser(config):

492

506

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

493

507

"enabled")

494

508

509

# Uppercase and remove spaces from fingerprint for later

510

# comparison purposes with return value from the

511

# fingerprint() function

495

512

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

496

513

.replace(" ", ""))

497

514

if "secret" in section:

502

519

"rb") as secfile:

503

520

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

504

521

else:

505

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

522

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

506

523

.format(section))

507

524

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

508

525

client["extended_timeout"] = string_to_delta(

519

536

520

537

return settings

521

538

522

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

539

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

523

540

self.name = name

541

if server_settings is None:

542

server_settings = {}

543

self.server_settings = server_settings

524

544

# adding all client settings

525

for setting, value in settings.iteritems():

545

for setting, value in settings.items():

526

546

setattr(self, setting, value)

527

547

528

548

if self.enabled:

536

556

self.expires = None

537

557

538

558

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

539

# Uppercase and remove spaces from fingerprint for later

540

# comparison purposes with return value from the fingerprint()

541

# function

542

559

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

543

560

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

544

561

datetime.datetime.utcnow())

551

568

self.current_checker_command = None

552

569

self.approved = None

553

570

self.approvals_pending = 0

554

self.changedstate = (multiprocessing_manager

555

.Condition(multiprocessing_manager

556

.Lock()))

557

self.client_structure = [attr for attr in

558

self.__dict__.iterkeys()

571

self.changedstate = multiprocessing_manager.Condition(

572

multiprocessing_manager.Lock())

573

self.client_structure = [attr

574

for attr in self.__dict__.iterkeys()

559

575

if not attr.startswith("_")]

560

576

self.client_structure.append("client_structure")

561

577

562

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

563

lambda obj:

564

isinstance(obj,

565

property)):

578

for name, t in inspect.getmembers(

579

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

566

580

if not name.startswith("_"):

567

581

self.client_structure.append(name)

568

582

610

624

# and every interval from then on.

611

625

if self.checker_initiator_tag is not None:

612

626

gobject.source_remove(self.checker_initiator_tag)

613

self.checker_initiator_tag = (gobject.timeout_add

614

(self.interval_milliseconds(),

615

self.start_checker))

627

self.checker_initiator_tag = gobject.timeout_add(

628

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

629

self.start_checker)

616

630

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

617

631

if self.disable_initiator_tag is not None:

618

632

gobject.source_remove(self.disable_initiator_tag)

619

self.disable_initiator_tag = (gobject.timeout_add

620

(self.timeout_milliseconds(),

621

self.disable))

633

self.disable_initiator_tag = gobject.timeout_add(

634

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

622

635

# Also start a new checker *right now*.

623

636

self.start_checker()

624

637

633

646

vars(self))

634

647

self.checked_ok()

635

648

else:

636

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

637

vars(self))

649

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

638

650

else:

639

651

self.last_checker_status = -1

640

652

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

654

666

gobject.source_remove(self.disable_initiator_tag)

655

667

self.disable_initiator_tag = None

656

668

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

657

self.disable_initiator_tag = (gobject.timeout_add

658

(timedelta_to_milliseconds

659

(timeout), self.disable))

669

self.disable_initiator_tag = gobject.timeout_add(

670

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

660

671

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

661

672

662

673

def need_approval(self):

679

690

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

680

691

try:

681

692

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

682

except (AttributeError, OSError) as error:

683

if (isinstance(error, OSError)

684

and error.errno != errno.ECHILD):

685

raise error

693

except AttributeError:

694

pass

695

except OSError as error:

696

if error.errno != errno.ECHILD:

697

raise

686

698

else:

687

699

if pid:

688

700

logger.warning("Checker was a zombie")

692

704

# Start a new checker if needed

693

705

if self.checker is None:

694

706

# Escape attributes for the shell

695

escaped_attrs = dict(

696

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

697

for attr in

698

self.runtime_expansions)

707

escaped_attrs = {

708

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

709

for attr in self.runtime_expansions }

699

710

try:

700

711

command = self.checker_command % escaped_attrs

701

712

except TypeError as error:

702

713

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

703

self.checker_command, exc_info=error)

704

return True # Try again later

714

self.checker_command,

715

exc_info=error)

716

return True # Try again later

705

717

self.current_checker_command = command

706

718

try:

707

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

708

command, self.name)

719

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

720

self.name)

709

721

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

710

722

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

711

723

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

712

724

# always replaced by /dev/null.)

725

# The exception is when not debugging but nevertheless

726

# running in the foreground; use the previously

727

# created wnull.

728

popen_args = {}

729

if (not self.server_settings["debug"]

730

and self.server_settings["foreground"]):

731

popen_args.update({"stdout": wnull,

732

"stderr": wnull })

713

733

self.checker = subprocess.Popen(command,

714

734

close_fds=True,

715

shell=True, cwd="/")

735

shell=True,

736

cwd="/",

737

**popen_args)

716

738

except OSError as error:

717

739

logger.error("Failed to start subprocess",

718

740

exc_info=error)

719

self.checker_callback_tag = (gobject.child_watch_add

720

(self.checker.pid,

721

self.checker_callback,

722

data=command))

741

return True

742

self.checker_callback_tag = gobject.child_watch_add(

743

self.checker.pid, self.checker_callback, data=command)

723

744

# The checker may have completed before the gobject

724

745

# watch was added. Check for this.

725

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

746

try:

747

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

748

except OSError as error:

749

if error.errno == errno.ECHILD:

750

# This should never happen

751

logger.error("Child process vanished",

752

exc_info=error)

753

return True

754

raise

726

755

if pid:

727

756

gobject.source_remove(self.checker_callback_tag)

728

757

self.checker_callback(pid, status, command)

748

777

self.checker = None

749

778

750

779

751

def dbus_service_property(dbus_interface, signature="v",

752

access="readwrite", byte_arrays=False):

780

def dbus_service_property(dbus_interface,

781

signature="v",

782

access="readwrite",

783

byte_arrays=False):

753

784

"""Decorators for marking methods of a DBusObjectWithProperties to

754

785

become properties on the D-Bus.

755

786

764

795

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

765

796

if byte_arrays and signature != "ay":

766

797

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

767

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

798

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

799

768

800

def decorator(func):

769

801

func._dbus_is_property = True

770

802

func._dbus_interface = dbus_interface

775

807

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

776

808

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

777

809

return func

810

778

811

return decorator

779

812

780

813

789

822

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

790

823

"false"}

791

824

"""

825

792

826

def decorator(func):

793

827

func._dbus_is_interface = True

794

828

func._dbus_interface = dbus_interface

795

829

func._dbus_name = dbus_interface

796

830

return func

831

797

832

return decorator

798

833

799

834

801

836

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

802

837

Usage:

803

838

839

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

840

"org.freedesktop.DBus.Property."

841

"EmitsChangedSignal": "false"})

804

842

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

805

843

access="r")

806

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

807

"org.freedesktop.DBus.Property."

808

"EmitsChangedSignal": "false"})

809

844

def Property_dbus_property(self):

810

845

return dbus.Boolean(False)

811

846

"""

847

812

848

def decorator(func):

813

849

func._dbus_annotations = annotations

814

850

return func

851

815

852

return decorator

816

853

817

854

818

855

class DBusPropertyException(dbus.exceptions.DBusException):

819

856

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

820

857

"""

821

def __unicode__(self):

822

return unicode(str(self))

858

pass

823

859

824

860

825

861

class DBusPropertyAccessException(DBusPropertyException):

849

885

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

850

886

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

851

887

"""

852

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

888

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

853

889

False)

854

890

855

891

def _get_all_dbus_things(self, thing):

856

892

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

857

893

"""

858

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

859

name),

894

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

860

895

athing.__get__(self))

861

896

for cls in self.__class__.__mro__

862

897

for name, athing in

863

inspect.getmembers(cls,

864

self._is_dbus_thing(thing)))

898

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

865

899

866

900

def _get_dbus_property(self, interface_name, property_name):

867

901

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

868

902

property with the specified name and interface.

869

903

"""

870

for cls in self.__class__.__mro__:

871

for name, value in (inspect.getmembers

872

(cls,

873

self._is_dbus_thing("property"))):

904

for cls in self.__class__.__mro__:

905

for name, value in inspect.getmembers(

906

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

874

907

if (value._dbus_name == property_name

875

908

and value._dbus_interface == interface_name):

876

909

return value.__get__(self)

877

910

878

911

# No such property

879

raise DBusPropertyNotFound(self.dbus_object_path + ":"

880

+ interface_name + "."

881

+ property_name)

912

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

913

self.dbus_object_path, interface_name, property_name))

882

914

883

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

915

@dbus.service.method(dbus.PROPERTIES_IFACE,

916

in_signature="ss",

884

917

out_signature="v")

885

918

def Get(self, interface_name, property_name):

886

919

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

904

937

# The byte_arrays option is not supported yet on

905

938

# signatures other than "ay".

906

939

if prop._dbus_signature != "ay":

907

raise ValueError

940

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

941

"'ay' signature {!r}"

942

.format(prop._dbus_signature))

908

943

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

909

944

for byte in value))

910

945

prop(value)

911

946

912

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

947

@dbus.service.method(dbus.PROPERTIES_IFACE,

948

in_signature="s",

913

949

out_signature="a{sv}")

914

950

def GetAll(self, interface_name):

915

951

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

930

966

if not hasattr(value, "variant_level"):

931

967

properties[name] = value

932

968

continue

933

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

934

value.variant_level+1)

969

properties[name] = type(value)(

970

value, variant_level = value.variant_level + 1)

935

971

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

936

972

973

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

974

def PropertiesChanged(self, interface_name, changed_properties,

975

invalidated_properties):

976

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

977

standard.

978

"""

979

pass

980

937

981

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

938

982

out_signature="s",

939

983

path_keyword='object_path',

947

991

connection)

948

992

try:

949

993

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

994

950

995

def make_tag(document, name, prop):

951

996

e = document.createElement("property")

952

997

e.setAttribute("name", name)

953

998

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

954

999

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

955

1000

return e

1001

956

1002

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

957

1003

# Add property tags

958

1004

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

970

1016

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

971

1017

and prop._dbus_interface

972

1018

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

973

annots.update(getattr

974

(prop,

975

"_dbus_annotations",

976

{}))

977

for name, value in annots.iteritems():

1019

annots.update(getattr(

1020

prop, "_dbus_annotations", {}))

1021

for name, value in annots.items():

978

1022

ann_tag = document.createElement(

979

1023

"annotation")

980

1024

ann_tag.setAttribute("name", name)

983

1027

# Add interface annotation tags

984

1028

for annotation, value in dict(

985

1029

itertools.chain.from_iterable(

986

annotations().iteritems()

987

for name, annotations in

988

self._get_all_dbus_things("interface")

1030

annotations().items()

1031

for name, annotations

1032

in self._get_all_dbus_things("interface")

989

1033

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

990

)).iteritems():

1034

)).items():

991

1035

ann_tag = document.createElement("annotation")

992

1036

ann_tag.setAttribute("name", annotation)

993

1037

ann_tag.setAttribute("value", value)

1020

1064

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

1021

1065

if dt is None:

1022

1066

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

1023

return dbus.String(dt.isoformat(),

1024

variant_level=variant_level)

1067

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

1025

1068

1026

1069

1027

1070

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1047

1090

(from DBusObjectWithProperties) and interfaces (from the

1048

1091

dbus_interface_annotations decorator).

1049

1092

"""

1093

1050

1094

def wrapper(cls):

1051

1095

for orig_interface_name, alt_interface_name in (

1052

alt_interface_names.iteritems()):

1096

alt_interface_names.items()):

1053

1097

attr = {}

1054

1098

interface_names = set()

1055

1099

# Go though all attributes of the class

1057

1101

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

1058

1102

# with the wrong interface name

1059

1103

if (not hasattr(attribute, "_dbus_interface")

1060

or not attribute._dbus_interface

1061

.startswith(orig_interface_name)):

1104

or not attribute._dbus_interface.startswith(

1105

orig_interface_name)):

1062

1106

continue

1063

1107

# Create an alternate D-Bus interface name based on

1064

1108

# the current name

1065

alt_interface = (attribute._dbus_interface

1066

.replace(orig_interface_name,

1067

alt_interface_name))

1109

alt_interface = attribute._dbus_interface.replace(

1110

orig_interface_name, alt_interface_name)

1068

1111

interface_names.add(alt_interface)

1069

1112

# Is this a D-Bus signal?

1070

1113

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

1071

# Extract the original non-method function by

1072

# black magic

1114

# Extract the original non-method undecorated

1115

# function by black magic

1073

1116

nonmethod_func = (dict(

1074

zip(attribute.func_code.co_freevars,

1075

attribute.__closure__))["func"]

1076

.cell_contents)

1117

zip(attribute.func_code.co_freevars,

1118

attribute.__closure__))

1119

["func"].cell_contents)

1077

1120

# Create a new, but exactly alike, function

1078

1121

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

1079

1122

# with the alternate D-Bus interface name

1080

new_function = (dbus.service.signal

1081

(alt_interface,

1082

attribute._dbus_signature)

1123

new_function = (dbus.service.signal(

1124

alt_interface, attribute._dbus_signature)

1083

1125

(types.FunctionType(

1084

nonmethod_func.func_code,

1085

nonmethod_func.func_globals,

1086

nonmethod_func.func_name,

1087

nonmethod_func.func_defaults,

1088

nonmethod_func.func_closure)))

1126

nonmethod_func.func_code,

1127

nonmethod_func.func_globals,

1128

nonmethod_func.func_name,

1129

nonmethod_func.func_defaults,

1130

nonmethod_func.func_closure)))

1089

1131

# Copy annotations, if any

1090

1132

try:

1091

new_function._dbus_annotations = (

1092

dict(attribute._dbus_annotations))

1133

new_function._dbus_annotations = dict(

1134

attribute._dbus_annotations)

1093

1135

except AttributeError:

1094

1136

pass

1095

1137

# Define a creator of a function to call both the

1100

1142

"""This function is a scope container to pass

1101

1143

func1 and func2 to the "call_both" function

1102

1144

outside of its arguments"""

1145

1103

1146

def call_both(*args, **kwargs):

1104

1147

"""This function will emit two D-Bus

1105

1148

signals by calling func1 and func2"""

1106

1149

func1(*args, **kwargs)

1107

1150

func2(*args, **kwargs)

1151

1108

1152

return call_both

1109

1153

# Create the "call_both" function and add it to

1110

1154

# the class

1115

1159

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

1116

1160

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

1117

1161

# to the class.

1118

attr[attrname] = (dbus.service.method

1119

(alt_interface,

1120

attribute._dbus_in_signature,

1121

attribute._dbus_out_signature)

1122

(types.FunctionType

1123

(attribute.func_code,

1124

attribute.func_globals,

1125

attribute.func_name,

1126

attribute.func_defaults,

1127

attribute.func_closure)))

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

1172

# Copy annotations, if any

1129

1173

try:

1130

attr[attrname]._dbus_annotations = (

1131

dict(attribute._dbus_annotations))

1174

attr[attrname]._dbus_annotations = dict(

1175

attribute._dbus_annotations)

1132

1176

except AttributeError:

1133

1177

pass

1134

1178

# Is this a D-Bus property?

1137

1181

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

1138

1182

# property with the alternate D-Bus interface

1139

1183

# name. Add it to the class.

1140

attr[attrname] = (dbus_service_property

1141

(alt_interface,

1142

attribute._dbus_signature,

1143

attribute._dbus_access,

1144

attribute

1145

._dbus_get_args_options

1146

["byte_arrays"])

1147

(types.FunctionType

1148

(attribute.func_code,

1149

attribute.func_globals,

1150

attribute.func_name,

1151

attribute.func_defaults,

1152

attribute.func_closure)))

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)))

1153

1195

# Copy annotations, if any

1154

1196

try:

1155

attr[attrname]._dbus_annotations = (

1156

dict(attribute._dbus_annotations))

1197

attr[attrname]._dbus_annotations = dict(

1198

attribute._dbus_annotations)

1157

1199

except AttributeError:

1158

1200

pass

1159

1201

# Is this a D-Bus interface?

1162

1204

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

1163

1205

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

1164

1206

# to the class.

1165

attr[attrname] = (dbus_interface_annotations

1166

(alt_interface)

1167

(types.FunctionType

1168

(attribute.func_code,

1169

attribute.func_globals,

1170

attribute.func_name,

1171

attribute.func_defaults,

1172

attribute.func_closure)))

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)))

1173

1214

if deprecate:

1174

1215

# Deprecate all alternate interfaces

1175

iname="_AlternateDBusNames_interface_annotation{0}"

1216

iname="_AlternateDBusNames_interface_annotation{}"

1176

1217

for interface_name in interface_names:

1218

1177

1219

@dbus_interface_annotations(interface_name)

1178

1220

def func(self):

1179

1221

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

1180

"true" }

1222

"true" }

1181

1223

# Find an unused name

1182

1224

for aname in (iname.format(i)

1183

1225

for i in itertools.count()):

1187

1229

if interface_names:

1188

1230

# Replace the class with a new subclass of it with

1189

1231

# methods, signals, etc. as created above.

1190

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

1191

(cls,), attr)

1232

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

1233

(cls, ), attr)

1192

1234

return cls

1235

1193

1236

return wrapper

1194

1237

1195

1238

1196

1239

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

1197

"se.bsnet.fukt.Mandos"})

1240

"se.bsnet.fukt.Mandos"})

1198

1241

class ClientDBus(Client, DBusObjectWithProperties):

1199

1242

"""A Client class using D-Bus

1200

1243

1204

1247

"""

1205

1248

1206

1249

runtime_expansions = (Client.runtime_expansions

1207

+ ("dbus_object_path",))

1250

+ ("dbus_object_path", ))

1251

1252

_interface = "se.recompile.Mandos.Client"

1208

1253

1209

1254

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

1210

1255

1213

1258

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

1214

1259

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

1215

1260

# the D-Bus

1216

client_object_name = unicode(self.name).translate(

1261

client_object_name = str(self.name).translate(

1217

1262

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

1218

1263

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

1219

self.dbus_object_path = (dbus.ObjectPath

1220

("/clients/" + client_object_name))

1264

self.dbus_object_path = dbus.ObjectPath(

1265

"/clients/" + client_object_name)

1221

1266

DBusObjectWithProperties.__init__(self, self.bus,

1222

1267

self.dbus_object_path)

1223

1268

1224

def notifychangeproperty(transform_func,

1225

dbus_name, type_func=lambda x: x,

1226

variant_level=1):

1269

def notifychangeproperty(transform_func, dbus_name,

1270

type_func=lambda x: x,

1271

variant_level=1,

1272

invalidate_only=False,

1273

_interface=_interface):

1227

1274

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

1228

1275

its changes to DBus.

1229

1276

1234

1281

to the D-Bus. Default: no transform

1235

1282

variant_level: D-Bus variant level. Default: 1

1236

1283

"""

1237

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

1284

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

1285

1238

1286

def setter(self, value):

1239

1287

if hasattr(self, "dbus_object_path"):

1240

1288

if (not hasattr(self, attrname) or

1241

1289

type_func(getattr(self, attrname, None))

1242

1290

!= type_func(value)):

1243

dbus_value = transform_func(type_func(value),

1244

variant_level

1245

=variant_level)

1246

self.PropertyChanged(dbus.String(dbus_name),

1247

dbus_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())

1248

1306

setattr(self, attrname, value)

1249

1307

1250

1308

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

1256

1314

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

1257

1315

last_enabled = notifychangeproperty(datetime_to_dbus,

1258

1316

"LastEnabled")

1259

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

1260

type_func = lambda checker:

1261

checker is not None)

1317

checker = notifychangeproperty(

1318

dbus.Boolean, "CheckerRunning",

1319

type_func = lambda checker: checker is not None)

1262

1320

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1263

1321

"LastCheckedOK")

1264

1322

last_checker_status = notifychangeproperty(dbus.Int16,

1267

1325

datetime_to_dbus, "LastApprovalRequest")

1268

1326

approved_by_default = notifychangeproperty(dbus.Boolean,

1269

1327

"ApprovedByDefault")

1270

approval_delay = notifychangeproperty(dbus.UInt64,

1271

"ApprovalDelay",

1272

type_func =

1273

timedelta_to_milliseconds)

1328

approval_delay = notifychangeproperty(

1329

dbus.UInt64, "ApprovalDelay",

1330

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

1274

1331

approval_duration = notifychangeproperty(

1275

1332

dbus.UInt64, "ApprovalDuration",

1276

type_func = timedelta_to_milliseconds)

1333

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

1277

1334

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

1278

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

1279

type_func =

1280

timedelta_to_milliseconds)

1335

timeout = notifychangeproperty(

1336

dbus.UInt64, "Timeout",

1337

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

1281

1338

extended_timeout = notifychangeproperty(

1282

1339

dbus.UInt64, "ExtendedTimeout",

1283

type_func = timedelta_to_milliseconds)

1284

interval = notifychangeproperty(dbus.UInt64,

1285

"Interval",

1286

type_func =

1287

timedelta_to_milliseconds)

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)

1288

1344

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

1345

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

1346

invalidate_only=True)

1289

1347

1290

1348

del notifychangeproperty

1291

1349

1318

1376

*args, **kwargs)

1319

1377

1320

1378

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

1321

old_checker = self.checker

1322

if self.checker is not None:

1323

old_checker_pid = self.checker.pid

1324

else:

1325

old_checker_pid = None

1379

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

1326

1380

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

1327

1381

# Only if new checker process was started

1328

1382

if (self.checker is not None

1337

1391

1338

1392

def approve(self, value=True):

1339

1393

self.approved = value

1340

gobject.timeout_add(timedelta_to_milliseconds

1341

(self.approval_duration),

1342

self._reset_approved)

1394

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

1395

* 1000), self._reset_approved)

1343

1396

self.send_changedstate()

1344

1397

1345

1398

## D-Bus methods, signals & properties

1346

_interface = "se.recompile.Mandos.Client"

1347

1399

1348

1400

## Interfaces

1349

1401

1350

@dbus_interface_annotations(_interface)

1351

def _foo(self):

1352

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

1353

"false"}

1354

1355

1402

## Signals

1356

1403

1357

1404

# CheckerCompleted - signal

1367

1414

pass

1368

1415

1369

1416

# PropertyChanged - signal

1417

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

1370

1418

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

1371

1419

def PropertyChanged(self, property, value):

1372

1420

"D-Bus signal"

1436

1484

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

1437

1485

1438

1486

# ApprovedByDefault - property

1439

@dbus_service_property(_interface, signature="b",

1487

@dbus_service_property(_interface,

1488

signature="b",

1440

1489

access="readwrite")

1441

1490

def ApprovedByDefault_dbus_property(self, value=None):

1442

1491

if value is None: # get

1444

1493

self.approved_by_default = bool(value)

1445

1494

1446

1495

# ApprovalDelay - property

1447

@dbus_service_property(_interface, signature="t",

1496

@dbus_service_property(_interface,

1497

signature="t",

1448

1498

access="readwrite")

1449

1499

def ApprovalDelay_dbus_property(self, value=None):

1450

1500

if value is None: # get

1451

return dbus.UInt64(self.approval_delay_milliseconds())

1501

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

1502

* 1000)

1452

1503

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

1453

1504

1454

1505

# ApprovalDuration - property

1455

@dbus_service_property(_interface, signature="t",

1506

@dbus_service_property(_interface,

1507

signature="t",

1456

1508

access="readwrite")

1457

1509

def ApprovalDuration_dbus_property(self, value=None):

1458

1510

if value is None: # get

1459

return dbus.UInt64(timedelta_to_milliseconds(

1460

self.approval_duration))

1511

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

1512

* 1000)

1461

1513

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

1462

1514

1463

1515

# Name - property

1471

1523

return dbus.String(self.fingerprint)

1472

1524

1473

1525

# Host - property

1474

@dbus_service_property(_interface, signature="s",

1526

@dbus_service_property(_interface,

1527

signature="s",

1475

1528

access="readwrite")

1476

1529

def Host_dbus_property(self, value=None):

1477

1530

if value is None: # get

1478

1531

return dbus.String(self.host)

1479

self.host = unicode(value)

1532

self.host = str(value)

1480

1533

1481

1534

# Created - property

1482

1535

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

1489

1542

return datetime_to_dbus(self.last_enabled)

1490

1543

1491

1544

# Enabled - property

1492

@dbus_service_property(_interface, signature="b",

1545

@dbus_service_property(_interface,

1546

signature="b",

1493

1547

access="readwrite")

1494

1548

def Enabled_dbus_property(self, value=None):

1495

1549

if value is None: # get

1500

1554

self.disable()

1501

1555

1502

1556

# LastCheckedOK - property

1503

@dbus_service_property(_interface, signature="s",

1557

@dbus_service_property(_interface,

1558

signature="s",

1504

1559

access="readwrite")

1505

1560

def LastCheckedOK_dbus_property(self, value=None):

1506

1561

if value is not None:

1509

1564

return datetime_to_dbus(self.last_checked_ok)

1510

1565

1511

1566

# LastCheckerStatus - property

1512

@dbus_service_property(_interface, signature="n",

1513

access="read")

1567

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

1514

1568

def LastCheckerStatus_dbus_property(self):

1515

1569

return dbus.Int16(self.last_checker_status)

1516

1570

1525

1579

return datetime_to_dbus(self.last_approval_request)

1526

1580

1527

1581

# Timeout - property

1528

@dbus_service_property(_interface, signature="t",

1582

@dbus_service_property(_interface,

1583

signature="t",

1529

1584

access="readwrite")

1530

1585

def Timeout_dbus_property(self, value=None):

1531

1586

if value is None: # get

1532

return dbus.UInt64(self.timeout_milliseconds())

1587

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

1533

1588

old_timeout = self.timeout

1534

1589

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

1535

1590

# Reschedule disabling

1544

1599

is None):

1545

1600

return

1546

1601

gobject.source_remove(self.disable_initiator_tag)

1547

self.disable_initiator_tag = (

1548

gobject.timeout_add(

1549

timedelta_to_milliseconds(self.expires - now),

1550

self.disable))

1602

self.disable_initiator_tag = gobject.timeout_add(

1603

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

1604

self.disable)

1551

1605

1552

1606

# ExtendedTimeout - property

1553

@dbus_service_property(_interface, signature="t",

1607

@dbus_service_property(_interface,

1608

signature="t",

1554

1609

access="readwrite")

1555

1610

def ExtendedTimeout_dbus_property(self, value=None):

1556

1611

if value is None: # get

1557

return dbus.UInt64(self.extended_timeout_milliseconds())

1612

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

1613

* 1000)

1558

1614

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

1559

1615

1560

1616

# Interval - property

1561

@dbus_service_property(_interface, signature="t",

1617

@dbus_service_property(_interface,

1618

signature="t",

1562

1619

access="readwrite")

1563

1620

def Interval_dbus_property(self, value=None):

1564

1621

if value is None: # get

1565

return dbus.UInt64(self.interval_milliseconds())

1622

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

1566

1623

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

1567

1624

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

1568

1625

return

1569

1626

if self.enabled:

1570

1627

# Reschedule checker run

1571

1628

gobject.source_remove(self.checker_initiator_tag)

1572

self.checker_initiator_tag = (gobject.timeout_add

1573

(value, self.start_checker))

1574

self.start_checker() # Start one now, too

1629

self.checker_initiator_tag = gobject.timeout_add(

1630

value, self.start_checker)

1631

self.start_checker() # Start one now, too

1575

1632

1576

1633

# Checker - property

1577

@dbus_service_property(_interface, signature="s",

1634

@dbus_service_property(_interface,

1635

signature="s",

1578

1636

access="readwrite")

1579

1637

def Checker_dbus_property(self, value=None):

1580

1638

if value is None: # get

1581

1639

return dbus.String(self.checker_command)

1582

self.checker_command = unicode(value)

1640

self.checker_command = str(value)

1583

1641

1584

1642

# CheckerRunning - property

1585

@dbus_service_property(_interface, signature="b",

1643

@dbus_service_property(_interface,

1644

signature="b",

1586

1645

access="readwrite")

1587

1646

def CheckerRunning_dbus_property(self, value=None):

1588

1647

if value is None: # get

1598

1657

return self.dbus_object_path # is already a dbus.ObjectPath

1599

1658

1600

1659

# Secret = property

1601

@dbus_service_property(_interface, signature="ay",

1602

access="write", byte_arrays=True)

1660

@dbus_service_property(_interface,

1661

signature="ay",

1662

access="write",

1663

byte_arrays=True)

1603

1664

def Secret_dbus_property(self, value):

1604

self.secret = str(value)

1665

self.secret = bytes(value)

1605

1666

1606

1667

del _interface

1607

1668

1611

1672

self._pipe = child_pipe

1612

1673

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

1613

1674

if not self._pipe.recv():

1614

raise KeyError()

1675

raise KeyError(fpr)

1615

1676

1616

1677

def __getattribute__(self, name):

1617

1678

if name == '_pipe':

1621

1682

if data[0] == 'data':

1622

1683

return data[1]

1623

1684

if data[0] == 'function':

1685

1624

1686

def func(*args, **kwargs):

1625

1687

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

1626

1688

return self._pipe.recv()[1]

1689

1627

1690

return func

1628

1691

1629

1692

def __setattr__(self, name, value):

1641

1704

def handle(self):

1642

1705

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

1643

1706

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

1644

unicode(self.client_address))

1707

str(self.client_address))

1645

1708

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

1646

1709

self.server.child_pipe.fileno())

1647

1710

1648

session = (gnutls.connection

1649

.ClientSession(self.request,

1650

gnutls.connection

1651

.X509Credentials()))

1711

session = gnutls.connection.ClientSession(

1712

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

1652

1713

1653

1714

# Note: gnutls.connection.X509Credentials is really a

1654

1715

# generic GnuTLS certificate credentials object so long as

1663

1724

priority = self.server.gnutls_priority

1664

1725

if priority is None:

1665

1726

priority = "NORMAL"

1666

(gnutls.library.functions

1667

.gnutls_priority_set_direct(session._c_object,

1668

priority, None))

1727

gnutls.library.functions.gnutls_priority_set_direct(

1728

session._c_object, priority, None)

1669

1729

1670

1730

# Start communication using the Mandos protocol

1671

1731

# Get protocol number

1673

1733

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

1674

1734

try:

1675

1735

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

1676

raise RuntimeError

1736

raise RuntimeError(line)

1677

1737

except (ValueError, IndexError, RuntimeError) as error:

1678

1738

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

1679

1739

return

1691

1751

approval_required = False

1692

1752

try:

1693

1753

try:

1694

fpr = self.fingerprint(self.peer_certificate

1695

(session))

1754

fpr = self.fingerprint(

1755

self.peer_certificate(session))

1696

1756

except (TypeError,

1697

1757

gnutls.errors.GNUTLSError) as error:

1698

1758

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

1713

1773

while True:

1714

1774

if not client.enabled:

1715

1775

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

1716

client.name)

1776

client.name)

1717

1777

if self.server.use_dbus:

1718

1778

# Emit D-Bus signal

1719

1779

client.Rejected("Disabled")

1728

1788

if self.server.use_dbus:

1729

1789

# Emit D-Bus signal

1730

1790

client.NeedApproval(

1731

client.approval_delay_milliseconds(),

1732

client.approved_by_default)

1791

client.approval_delay.total_seconds()

1792

* 1000, client.approved_by_default)

1733

1793

else:

1734

1794

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

1735

1795

client.name)

1741

1801

#wait until timeout or approved

1742

1802

time = datetime.datetime.now()

1743

1803

client.changedstate.acquire()

1744

client.changedstate.wait(

1745

float(timedelta_to_milliseconds(delay)

1746

/ 1000))

1804

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

1747

1805

client.changedstate.release()

1748

1806

time2 = datetime.datetime.now()

1749

1807

if (time2 - time) >= delay:

1768

1826

logger.warning("gnutls send failed",

1769

1827

exc_info=error)

1770

1828

return

1771

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

1772

sent, len(client.secret)

1773

- (sent_size + sent))

1829

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

1830

len(client.secret) - (sent_size

1831

+ sent))

1774

1832

sent_size += sent

1775

1833

1776

1834

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

1793

1851

def peer_certificate(session):

1794

1852

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

1795

1853

# If not an OpenPGP certificate...

1796

if (gnutls.library.functions

1797

.gnutls_certificate_type_get(session._c_object)

1854

if (gnutls.library.functions.gnutls_certificate_type_get(

1855

session._c_object)

1798

1856

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1799

1857

# ...do the normal thing

1800

1858

return session.peer_certificate

1814

1872

def fingerprint(openpgp):

1815

1873

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1816

1874

# New GnuTLS "datum" with the OpenPGP public key

1817

datum = (gnutls.library.types

1818

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

1819

ctypes.POINTER

1820

(ctypes.c_ubyte)),

1821

ctypes.c_uint(len(openpgp))))

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)))

1822

1879

# New empty GnuTLS certificate

1823

1880

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1824

(gnutls.library.functions

1825

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

1881

gnutls.library.functions.gnutls_openpgp_crt_init(

1882

ctypes.byref(crt))

1826

1883

# Import the OpenPGP public key into the certificate

1827

(gnutls.library.functions

1828

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

1829

gnutls.library.constants

1830

.GNUTLS_OPENPGP_FMT_RAW))

1884

gnutls.library.functions.gnutls_openpgp_crt_import(

1885

crt, ctypes.byref(datum),

1886

gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)

1831

1887

# Verify the self signature in the key

1832

1888

crtverify = ctypes.c_uint()

1833

(gnutls.library.functions

1834

.gnutls_openpgp_crt_verify_self(crt, 0,

1835

ctypes.byref(crtverify)))

1889

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

1890

crt, 0, ctypes.byref(crtverify))

1836

1891

if crtverify.value != 0:

1837

1892

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1838

raise (gnutls.errors.CertificateSecurityError

1839

("Verify failed"))

1893

raise gnutls.errors.CertificateSecurityError(

1894

"Verify failed")

1840

1895

# New buffer for the fingerprint

1841

1896

buf = ctypes.create_string_buffer(20)

1842

1897

buf_len = ctypes.c_size_t()

1843

1898

# Get the fingerprint from the certificate into the buffer

1844

(gnutls.library.functions

1845

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

1846

ctypes.byref(buf_len)))

1899

gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(

1900

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

1847

1901

# Deinit the certificate

1848

1902

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1849

1903

# Convert the buffer to a Python bytestring

1855

1909

1856

1910

class MultiprocessingMixIn(object):

1857

1911

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

1912

1858

1913

def sub_process_main(self, request, address):

1859

1914

try:

1860

1915

self.finish_request(request, address)

1872

1927

1873

1928

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1874

1929

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

1930

1875

1931

def process_request(self, request, client_address):

1876

1932

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

1877

1933

1886

1942

1887

1943

def add_pipe(self, parent_pipe, proc):

1888

1944

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

1889

raise NotImplementedError

1945

raise NotImplementedError()

1890

1946

1891

1947

1892

1948

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1898

1954

interface: None or a network interface name (string)

1899

1955

use_ipv6: Boolean; to use IPv6 or not

1900

1956

"""

1957

1901

1958

def __init__(self, server_address, RequestHandlerClass,

1902

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

1959

interface=None,

1960

use_ipv6=True,

1961

socketfd=None):

1903

1962

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

1904

1963

creating a new one with socket.socket().

1905

1964

"""

1946

2005

self.interface)

1947

2006

else:

1948

2007

try:

1949

self.socket.setsockopt(socket.SOL_SOCKET,

1950

SO_BINDTODEVICE,

1951

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

2008

self.socket.setsockopt(

2009

socket.SOL_SOCKET, SO_BINDTODEVICE,

2010

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

1952

2011

except socket.error as error:

1953

2012

if error.errno == errno.EPERM:

1954

2013

logger.error("No permission to bind to"

1968

2027

if self.address_family == socket.AF_INET6:

1969

2028

any_address = "::" # in6addr_any

1970

2029

else:

1971

any_address = socket.INADDR_ANY

2030

any_address = "0.0.0.0" # INADDR_ANY

1972

2031

self.server_address = (any_address,

1973

2032

self.server_address[1])

1974

2033

elif not self.server_address[1]:

1975

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

1976

0)

2034

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

1977

2035

# if self.interface:

1978

2036

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

1979

2037

# 0, # port

1993

2051

1994

2052

Assumes a gobject.MainLoop event loop.

1995

2053

"""

2054

1996

2055

def __init__(self, server_address, RequestHandlerClass,

1997

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

1998

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

2056

interface=None,

2057

use_ipv6=True,

2058

clients=None,

2059

gnutls_priority=None,

2060

use_dbus=True,

2061

socketfd=None):

1999

2062

self.enabled = False

2000

2063

self.clients = clients

2001

2064

if self.clients is None:

2007

2070

interface = interface,

2008

2071

use_ipv6 = use_ipv6,

2009

2072

socketfd = socketfd)

2073

2010

2074

def server_activate(self):

2011

2075

if self.enabled:

2012

2076

return socketserver.TCPServer.server_activate(self)

2016

2080

2017

2081

def add_pipe(self, parent_pipe, proc):

2018

2082

# Call "handle_ipc" for both data and EOF events

2019

gobject.io_add_watch(parent_pipe.fileno(),

2020

gobject.IO_IN | gobject.IO_HUP,

2021

functools.partial(self.handle_ipc,

2022

parent_pipe =

2023

parent_pipe,

2024

proc = proc))

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))

2025

2089

2026

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

2027

proc = None, client_object=None):

2090

def handle_ipc(self, source, condition,

2091

parent_pipe=None,

2092

proc = None,

2093

client_object=None):

2028

2094

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

2029

2095

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

2030

2096

# Wait for other process to exit

2053

2119

parent_pipe.send(False)

2054

2120

return False

2055

2121

2056

gobject.io_add_watch(parent_pipe.fileno(),

2057

gobject.IO_IN | gobject.IO_HUP,

2058

functools.partial(self.handle_ipc,

2059

parent_pipe =

2060

parent_pipe,

2061

proc = proc,

2062

client_object =

2063

client))

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))

2064

2129

parent_pipe.send(True)

2065

2130

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

2066

2131

# same fileno

2072

2137

2073

2138

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

2074

2139

funcname)(*args,

2075

**kwargs)))

2140

**kwargs)))

2076

2141

2077

2142

if command == 'getattr':

2078

2143

attrname = request[1]

2079

2144

if callable(client_object.__getattribute__(attrname)):

2080

parent_pipe.send(('function',))

2145

parent_pipe.send(('function', ))

2081

2146

else:

2082

parent_pipe.send(('data', client_object

2083

.__getattribute__(attrname)))

2147

parent_pipe.send((

2148

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

2084

2149

2085

2150

if command == 'setattr':

2086

2151

attrname = request[1]

2090

2155

return True

2091

2156

2092

2157

2158

def rfc3339_duration_to_delta(duration):

2159

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

2160

2161

>>> rfc3339_duration_to_delta("P7D")

2162

datetime.timedelta(7)

2163

>>> rfc3339_duration_to_delta("PT60S")

2164

datetime.timedelta(0, 60)

2165

>>> rfc3339_duration_to_delta("PT60M")

2166

datetime.timedelta(0, 3600)

2167

>>> rfc3339_duration_to_delta("PT24H")

2168

datetime.timedelta(1)

2169

>>> rfc3339_duration_to_delta("P1W")

2170

datetime.timedelta(7)

2171

>>> rfc3339_duration_to_delta("PT5M30S")

2172

datetime.timedelta(0, 330)

2173

>>> rfc3339_duration_to_delta("P1DT3M20S")

2174

datetime.timedelta(1, 200)

2175

"""

2176

2177

# Parsing an RFC 3339 duration with regular expressions is not

2178

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

2179

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

2180

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

2181

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

2182

# avoid excessive use of external libraries.

2183

2184

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

2185

Token = collections.namedtuple("Token",

2186

("regexp", # To match token; if

2187

# "value" is not None,

2188

# must have a "group"

2189

# containing digits

2190

"value", # datetime.timedelta or

2191

# None

2192

"followers")) # Tokens valid after

2193

# this token

2194

Token = collections.namedtuple("Token", (

2195

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

2196

# a "group" containing digits

2197

"value", # datetime.timedelta or None

2198

"followers")) # Tokens valid after this token

2199

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

2200

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

2201

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

2202

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

2203

datetime.timedelta(seconds=1),

2204

frozenset((token_end, )))

2205

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

2206

datetime.timedelta(minutes=1),

2207

frozenset((token_second, token_end)))

2208

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

2209

datetime.timedelta(hours=1),

2210

frozenset((token_minute, token_end)))

2211

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

2212

None,

2213

frozenset((token_hour, token_minute,

2214

token_second)))

2215

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

2216

datetime.timedelta(days=1),

2217

frozenset((token_time, token_end)))

2218

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

2219

datetime.timedelta(weeks=4),

2220

frozenset((token_day, token_end)))

2221

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

2222

datetime.timedelta(weeks=52),

2223

frozenset((token_month, token_end)))

2224

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

2225

datetime.timedelta(weeks=1),

2226

frozenset((token_end, )))

2227

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

2228

frozenset((token_year, token_month,

2229

token_day, token_time,

2230

token_week)))

2231

# Define starting values

2232

value = datetime.timedelta() # Value so far

2233

found_token = None

2234

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

2235

s = duration # String left to parse

2236

# Loop until end token is found

2237

while found_token is not token_end:

2238

# Search for any currently valid tokens

2239

for token in followers:

2240

match = token.regexp.match(s)

2241

if match is not None:

2242

# Token found

2243

if token.value is not None:

2244

# Value found, parse digits

2245

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

2246

# Add to value so far

2247

value += factor * token.value

2248

# Strip token from string

2249

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

2250

# Go to found token

2251

found_token = token

2252

# Set valid next tokens

2253

followers = found_token.followers

2254

break

2255

else:

2256

# No currently valid tokens were found

2257

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

2258

.format(duration))

2259

# End token found

2260

return value

2261

2262

2093

2263

def string_to_delta(interval):

2094

2264

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

2095

2265

2106

2276

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

2107

2277

datetime.timedelta(0, 330)

2108

2278

"""

2279

2280

try:

2281

return rfc3339_duration_to_delta(interval)

2282

except ValueError:

2283

pass

2284

2109

2285

timevalue = datetime.timedelta(0)

2110

2286

for s in interval.split():

2111

2287

try:

2112

suffix = unicode(s[-1])

2288

suffix = s[-1]

2113

2289

value = int(s[:-1])

2114

2290

if suffix == "d":

2115

2291

delta = datetime.timedelta(value)

2122

2298

elif suffix == "w":

2123

2299

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

2124

2300

else:

2125

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

2126

.format(suffix))

2127

except (ValueError, IndexError) as e:

2301

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

2302

except IndexError as e:

2128

2303

raise ValueError(*(e.args))

2129

2304

timevalue += delta

2130

2305

return timevalue

2146

2321

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

2147

2322

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

2148

2323

raise OSError(errno.ENODEV,

2149

"{0} not a character device"

2324

"{} not a character device"

2150

2325

.format(os.devnull))

2151

2326

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

2152

2327

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

2162

2337

2163

2338

parser = argparse.ArgumentParser()

2164

2339

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

2165

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

2340

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

2166

2341

help="show version number and exit")

2167

2342

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

2168

2343

help="Bind to interface IF")

2174

2349

help="Run self-test")

2175

2350

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

2176

2351

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

2177

" to terminal")

2352

" to terminal", default=None)

2178

2353

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

2179

2354

help="Debug level for stdout output")

2180

2355

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

2187

2362

" files")

2188

2363

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

2189

2364

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

2190

" system bus interface")

2365

" system bus interface", default=None)

2191

2366

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

2192

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

2367

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

2368

default=None)

2193

2369

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

2194

2370

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

2195

" state")

2371

" state", default=None)

2196

2372

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

2197

2373

help="Specify a file descriptor to a network"

2198

2374

" socket to use instead of creating one")

2199

2375

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

2200

2376

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

2201

2377

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

2202

help="Run in foreground")

2378

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

2379

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

2380

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

2381

default=None)

2203

2382

2204

2383

options = parser.parse_args()

2205

2384

2206

2385

if options.check:

2207

2386

import doctest

2208

doctest.testmod()

2209

sys.exit()

2387

fail_count, test_count = doctest.testmod()

2388

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

2210

2389

2211

2390

# Default values for config file for server-global settings

2212

2391

server_defaults = { "interface": "",

2214

2393

"port": "",

2215

2394

"debug": "False",

2216

2395

"priority":

2217

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

2396

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

2397

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

2218

2398

"servicename": "Mandos",

2219

2399

"use_dbus": "True",

2220

2400

"use_ipv6": "True",

2223

2403

"socket": "",

2224

2404

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

2225

2405

"foreground": "False",

2226

}

2406

"zeroconf": "True",

2407

}

2227

2408

2228

2409

# Parse config file for server-global settings

2229

2410

server_config = configparser.SafeConfigParser(server_defaults)

2230

2411

del server_defaults

2231

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

2232

"mandos.conf"))

2412

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

2233

2413

# Convert the SafeConfigParser object to a dict

2234

2414

server_settings = server_config.defaults()

2235

2415

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

2253

2433

# Override the settings from the config file with command line

2254

2434

# options, if set.

2255

2435

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

2256

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

2257

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

2258

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

2436

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

2437

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

2438

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

2259

2439

value = getattr(options, option)

2260

2440

if value is not None:

2261

2441

server_settings[option] = value

2262

2442

del options

2263

2443

# Force all strings to be unicode

2264

2444

for option in server_settings.keys():

2265

if type(server_settings[option]) is str:

2266

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

2445

if isinstance(server_settings[option], bytes):

2446

server_settings[option] = (server_settings[option]

2447

.decode("utf-8"))

2448

# Force all boolean options to be boolean

2449

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

2450

"foreground", "zeroconf"):

2451

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

2267

2452

# Debug implies foreground

2268

2453

if server_settings["debug"]:

2269

2454

server_settings["foreground"] = True

2271

2456

2272

2457

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

2273

2458

2459

if (not server_settings["zeroconf"]

2460

and not (server_settings["port"]

2461

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

2462

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

2463

2274

2464

# For convenience

2275

2465

debug = server_settings["debug"]

2276

2466

debuglevel = server_settings["debuglevel"]

2279

2469

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

2280

2470

stored_state_file)

2281

2471

foreground = server_settings["foreground"]

2472

zeroconf = server_settings["zeroconf"]

2282

2473

2283

2474

if debug:

2284

2475

initlogger(debug, logging.DEBUG)

2290

2481

initlogger(debug, level)

2291

2482

2292

2483

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

2293

syslogger.setFormatter(logging.Formatter

2294

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

2295

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

2296

.format(server_settings

2297

["servicename"])))

2484

syslogger.setFormatter(

2485

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

2486

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

2487

server_settings["servicename"])))

2298

2488

2299

2489

# Parse config file with clients

2300

2490

client_config = configparser.SafeConfigParser(Client

2305

2495

global mandos_dbus_service

2306

2496

mandos_dbus_service = None

2307

2497

2308

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

2309

server_settings["port"]),

2310

ClientHandler,

2311

interface=(server_settings["interface"]

2312

or None),

2313

use_ipv6=use_ipv6,

2314

gnutls_priority=

2315

server_settings["priority"],

2316

use_dbus=use_dbus,

2317

socketfd=(server_settings["socket"]

2318

or None))

2498

socketfd = None

2499

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

2500

socketfd = server_settings["socket"]

2501

tcp_server = MandosServer(

2502

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

2503

ClientHandler,

2504

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

2505

use_ipv6=use_ipv6,

2506

gnutls_priority=server_settings["priority"],

2507

use_dbus=use_dbus,

2508

socketfd=socketfd)

2319

2509

if not foreground:

2320

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

2510

pidfilename = "/run/mandos.pid"

2511

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

2512

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

2321

2513

pidfile = None

2322

2514

try:

2323

pidfile = open(pidfilename, "w")

2515

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

2324

2516

except IOError as e:

2325

2517

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

2326

2518

exc_info=e)

2340

2532

os.setuid(uid)

2341

2533

except OSError as error:

2342

2534

if error.errno != errno.EPERM:

2343

raise error

2535

raise

2344

2536

2345

2537

if debug:

2346

2538

# Enable all possible GnuTLS debugging

2353

2545

def debug_gnutls(level, string):

2354

2546

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

2355

2547

2356

(gnutls.library.functions

2357

.gnutls_global_set_log_function(debug_gnutls))

2548

gnutls.library.functions.gnutls_global_set_log_function(

2549

debug_gnutls)

2358

2550

2359

2551

# Redirect stdin so all checkers get /dev/null

2360

2552

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

2380

2572

if use_dbus:

2381

2573

try:

2382

2574

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

2383

bus, do_not_queue=True)

2384

old_bus_name = (dbus.service.BusName

2385

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

2386

do_not_queue=True))

2387

except dbus.exceptions.NameExistsException as e:

2575

bus,

2576

do_not_queue=True)

2577

old_bus_name = dbus.service.BusName(

2578

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

2579

do_not_queue=True)

2580

except dbus.exceptions.DBusException as e:

2388

2581

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

2389

2582

use_dbus = False

2390

2583

server_settings["use_dbus"] = False

2391

2584

tcp_server.use_dbus = False

2392

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2393

service = AvahiServiceToSyslog(name =

2394

server_settings["servicename"],

2395

servicetype = "_mandos._tcp",

2396

protocol = protocol, bus = bus)

2397

if server_settings["interface"]:

2398

service.interface = (if_nametoindex

2399

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

2585

if zeroconf:

2586

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2587

service = AvahiServiceToSyslog(

2588

name = server_settings["servicename"],

2589

servicetype = "_mandos._tcp",

2590

protocol = protocol,

2591

bus = bus)

2592

if server_settings["interface"]:

2593

service.interface = if_nametoindex(

2594

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

2400

2595

2401

2596

global multiprocessing_manager

2402

2597

multiprocessing_manager = multiprocessing.Manager()

2409

2604

old_client_settings = {}

2410

2605

clients_data = {}

2411

2606

2607

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

2608

global wnull

2609

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

2610

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

2611

# mode

2612

if debug or not foreground:

2613

wnull.close()

2614

2412

2615

# Get client data and settings from last running state.

2413

2616

if server_settings["restore"]:

2414

2617

try:

2415

2618

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

2416

clients_data, old_client_settings = (pickle.load

2417

(stored_state))

2619

clients_data, old_client_settings = pickle.load(

2620

stored_state)

2418

2621

os.remove(stored_state_path)

2419

2622

except IOError as e:

2420

2623

if e.errno == errno.ENOENT:

2421

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

2422

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

2624

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

2625

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

2423

2626

else:

2424

2627

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

2425

2628

exc_info=e)

2426

2629

raise

2427

2630

except EOFError as e:

2428

2631

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

2429

"EOFError:", exc_info=e)

2632

"EOFError:",

2633

exc_info=e)

2430

2634

2431

2635

with PGPEngine() as pgp:

2432

for client_name, client in clients_data.iteritems():

2636

for client_name, client in clients_data.items():

2637

# Skip removed clients

2638

if client_name not in client_settings:

2639

continue

2640

2433

2641

# Decide which value to use after restoring saved state.

2434

2642

# We have three different values: Old config file,

2435

2643

# new config file, and saved state.

2440

2648

# For each value in new config, check if it

2441

2649

# differs from the old config value (Except for

2442

2650

# the "secret" attribute)

2443

if (name != "secret" and

2444

value != old_client_settings[client_name]

2445

[name]):

2651

if (name != "secret"

2652

and (value !=

2653

old_client_settings[client_name][name])):

2446

2654

client[name] = value

2447

2655

except KeyError:

2448

2656

pass

2456

2664

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

2457

2665

if not client["last_checked_ok"]:

2458

2666

logger.warning(

2459

"disabling client {0} - Client never "

2460

"performed a successful checker"

2461

.format(client_name))

2667

"disabling client {} - Client never "

2668

"performed a successful checker".format(

2669

client_name))

2462

2670

client["enabled"] = False

2463

2671

elif client["last_checker_status"] != 0:

2464

2672

logger.warning(

2465

"disabling client {0} - Client "

2466

"last checker failed with error code {1}"

2467

.format(client_name,

2468

client["last_checker_status"]))

2673

"disabling client {} - Client last"

2674

" checker failed with error code"

2675

" {}".format(

2676

client_name,

2677

client["last_checker_status"]))

2469

2678

client["enabled"] = False

2470

2679

else:

2471

client["expires"] = (datetime.datetime

2472

.utcnow()

2473

+ client["timeout"])

2680

client["expires"] = (

2681

datetime.datetime.utcnow()

2682

+ client["timeout"])

2474

2683

logger.debug("Last checker succeeded,"

2475

" keeping {0} enabled"

2476

.format(client_name))

2684

" keeping {} enabled".format(

2685

client_name))

2477

2686

try:

2478

client["secret"] = (

2479

pgp.decrypt(client["encrypted_secret"],

2480

client_settings[client_name]

2481

["secret"]))

2687

client["secret"] = pgp.decrypt(

2688

client["encrypted_secret"],

2689

client_settings[client_name]["secret"])

2482

2690

except PGPError:

2483

2691

# If decryption fails, we use secret from new settings

2484

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

2485

.format(client_name))

2486

client["secret"] = (

2487

client_settings[client_name]["secret"])

2692

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

2693

client_name))

2694

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

2695

["secret"])

2488

2696

2489

2697

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

2490

2698

for client_name in (set(old_client_settings)

2495

2703

clients_data[client_name] = client_settings[client_name]

2496

2704

2497

2705

# Create all client objects

2498

for client_name, client in clients_data.iteritems():

2706

for client_name, client in clients_data.items():

2499

2707

tcp_server.clients[client_name] = client_class(

2500

name = client_name, settings = client)

2708

name = client_name,

2709

settings = client,

2710

server_settings = server_settings)

2501

2711

2502

2712

if not tcp_server.clients:

2503

2713

logger.warning("No clients defined")

2504

2714

2505

2715

if not foreground:

2506

2716

if pidfile is not None:

2717

pid = os.getpid()

2507

2718

try:

2508

2719

with pidfile:

2509

pid = os.getpid()

2510

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

2720

print(pid, file=pidfile)

2511

2721

except IOError:

2512

2722

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

2513

2723

pidfilename, pid)

2518

2728

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

2519

2729

2520

2730

if use_dbus:

2521

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

2522

"se.bsnet.fukt.Mandos"})

2731

2732

@alternate_dbus_interfaces(

2733

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

2523

2734

class MandosDBusService(DBusObjectWithProperties):

2524

2735

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

2736

2525

2737

def __init__(self):

2526

2738

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

2739

2527

2740

_interface = "se.recompile.Mandos"

2528

2741

2529

2742

@dbus_interface_annotations(_interface)

2530

2743

def _foo(self):

2531

return { "org.freedesktop.DBus.Property"

2532

".EmitsChangedSignal":

2533

"false"}

2744

return {

2745

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

2746

"false" }

2534

2747

2535

2748

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

2536

2749

def ClientAdded(self, objpath):

2550

2763

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

2551

2764

def GetAllClients(self):

2552

2765

"D-Bus method"

2553

return dbus.Array(c.dbus_object_path

2554

for c in

2766

return dbus.Array(c.dbus_object_path for c in

2555

2767

tcp_server.clients.itervalues())

2556

2768

2557

2769

@dbus.service.method(_interface,

2559

2771

def GetAllClientsWithProperties(self):

2560

2772

"D-Bus method"

2561

2773

return dbus.Dictionary(

2562

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

2563

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

2774

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

2775

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

2564

2776

signature="oa{sv}")

2565

2777

2566

2778

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

2583

2795

2584

2796

def cleanup():

2585

2797

"Cleanup function; run on exit"

2586

service.cleanup()

2798

if zeroconf:

2799

service.cleanup()

2587

2800

2588

2801

multiprocessing.active_children()

2802

wnull.close()

2589

2803

if not (tcp_server.clients or client_settings):

2590

2804

return

2591

2805

2602

2816

2603

2817

# A list of attributes that can not be pickled

2604

2818

# + secret.

2605

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

2606

"checker"))

2607

for name, typ in (inspect.getmembers

2608

(dbus.service.Object)):

2819

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

2820

"checker", "server_settings" }

2821

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

2822

.Object):

2609

2823

exclude.add(name)

2610

2824

2611

2825

client_dict["encrypted_secret"] = (client

2618

2832

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

2619

2833

2620

2834

try:

2621

with (tempfile.NamedTemporaryFile

2622

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

2623

dir=os.path.dirname(stored_state_path),

2624

delete=False)) as stored_state:

2835

with tempfile.NamedTemporaryFile(

2836

mode='wb',

2837

suffix=".pickle",

2838

prefix='clients-',

2839

dir=os.path.dirname(stored_state_path),

2840

delete=False) as stored_state:

2625

2841

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

2626

tempname=stored_state.name

2842

tempname = stored_state.name

2627

2843

os.rename(tempname, stored_state_path)

2628

2844

except (IOError, OSError) as e:

2629

2845

if not debug:

2632

2848

except NameError:

2633

2849

pass

2634

2850

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

2635

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

2851

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

2636

2852

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

2637

2853

else:

2638

2854

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

2639

2855

exc_info=e)

2640

raise e

2856

raise

2641

2857

2642

2858

# Delete all clients, and settings from config

2643

2859

while tcp_server.clients:

2648

2864

client.disable(quiet=True)

2649

2865

if use_dbus:

2650

2866

# Emit D-Bus signal

2651

mandos_dbus_service.ClientRemoved(client

2652

.dbus_object_path,

2653

client.name)

2867

mandos_dbus_service.ClientRemoved(

2868

client.dbus_object_path, client.name)

2654

2869

client_settings.clear()

2655

2870

2656

2871

atexit.register(cleanup)

2667

2882

tcp_server.server_activate()

2668

2883

2669

2884

# Find out what port we got

2670

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

2885

if zeroconf:

2886

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

2671

2887

if use_ipv6:

2672

2888

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

2673

2889

" flowinfo %d, scope_id %d",

2679

2895

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

2680

2896

2681

2897

try:

2682

# From the Avahi example code

2683

try:

2684

service.activate()

2685

except dbus.exceptions.DBusException as error:

2686

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

2687

cleanup()

2688

sys.exit(1)

2689

# End of Avahi example code

2898

if zeroconf:

2899

# From the Avahi example code

2900

try:

2901

service.activate()

2902

except dbus.exceptions.DBusException as error:

2903

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

2904

cleanup()

2905

sys.exit(1)

2906

# End of Avahi example code

2690

2907

2691

2908

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

2692

2909

lambda *args, **kwargs:

2707

2924

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

2708

2925

cleanup()

2709

2926

2927

2710

2928

if __name__ == '__main__':

2711

2929

main()