/mandos/release : revision 237.7.392

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

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#

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# Everything else is

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#

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

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

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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from future_builtins import *

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try:

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from future_builtins import *

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except ImportError:

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pass

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import SocketServer as socketserver

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try:

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import SocketServer as socketserver

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except ImportError:

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import socketserver

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import socket

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import argparse

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import datetime

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import errno

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import gnutls.crypto

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import gnutls.connection

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import gnutls.errors

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import gnutls.library.functions

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import gnutls.library.constants

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import gnutls.library.types

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import ConfigParser as configparser

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try:

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import ConfigParser as configparser

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except ImportError:

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import configparser

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import sys

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import re

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import os

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import struct

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import fcntl

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import functools

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import cPickle as pickle

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try:

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import cPickle as pickle

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except ImportError:

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import pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import collections

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import codecs

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import dbus

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import dbus.service

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import gobject

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import avahi

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from gi.repository import GLib

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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import ctypes.util

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import xml.dom.minidom

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import inspect

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import GnuPGInterface

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try:

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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 = "1.5.3"

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if sys.version_info.major == 2:

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str = unicode

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version = "1.7.7"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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syslogger = None

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try:

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.if_nametoindex)

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if_nametoindex = ctypes.cdll.LoadLibrary(

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

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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interface))

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

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ifreq[16:20])[0]

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

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

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return interface_index

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def copy_function(func):

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

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if sys.version_info.major == 2:

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return types.FunctionType(func.func_code,

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func.func_globals,

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func.func_name,

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func.func_defaults,

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func.func_closure)

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else:

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return types.FunctionType(func.__code__,

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func.__globals__,

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func.__name__,

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func.__defaults__,

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func.__closure__)

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

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"""init logger and add loglevel"""

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global syslogger

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syslogger = (logging.handlers.SysLogHandler(

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facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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address = "/dev/log"))

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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class PGPEngine(object):

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

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def __init__(self):

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self.gnupg = GnuPGInterface.GnuPG()

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

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self.gnupg = GnuPGInterface.GnuPG()

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self.gnupg.options.meta_interactive = False

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self.gnupg.options.homedir = self.tempdir

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

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'--quiet',

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'--no-use-agent'])

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self.gpg = "gpg"

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try:

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output = subprocess.check_output(["gpgconf"])

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for line in output.splitlines():

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name, text, path = line.split(b":")

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if name == "gpg":

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self.gpg = path

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break

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except OSError as e:

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if e.errno != errno.ENOENT:

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raise

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self.gnupgargs = ['--batch',

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'--homedir', self.tempdir,

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'--force-mdc',

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'--quiet',

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'--no-use-agent']

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def __enter__(self):

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return self

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

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

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self._cleanup()

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return False

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def password_encode(self, password):

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

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

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

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

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if len(encoded) > 2048:

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

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

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

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

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return encoded

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def encrypt(self, data, password):

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

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

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try:

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

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

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attach_fhs={'stderr': devnull})

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

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f.write(data)

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

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ciphertext = f.read()

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proc.wait()

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except IOError as e:

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raise PGPError(e)

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self.gnupg.passphrase = None

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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return ciphertext

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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([self.gpg, '--decrypt',

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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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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# Pretend that we have an Avahi module

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class Avahi(object):

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

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

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

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

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PROTO_INET = 0 # avahi-common/address.h

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PROTO_INET6 = 1 # avahi-common/address.h

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DBUS_NAME = "org.freedesktop.Avahi"

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DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"

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DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

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DBUS_PATH_SERVER = "/"

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def string_array_to_txt_array(self, t):

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

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

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ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h

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ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h

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ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h

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SERVER_INVALID = 0 # avahi-common/defs.h

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SERVER_REGISTERING = 1 # avahi-common/defs.h

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SERVER_RUNNING = 2 # avahi-common/defs.h

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SERVER_COLLISION = 3 # avahi-common/defs.h

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SERVER_FAILURE = 4 # avahi-common/defs.h

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avahi = Avahi()

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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"""

270

345

if self.rename_count >= self.max_renames:

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346

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

272

347

" after %i retries, exiting.",

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self.rename_count)

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raise AvahiServiceError("Too many renames")

275

self.name = unicode(self.server

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.GetAlternativeServiceName(self.name))

350

self.name = str(

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self.server.GetAlternativeServiceName(self.name))

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self.rename_count += 1

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353

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

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354

self.name)

279

self.remove()

355

if remove:

356

self.remove()

280

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try:

281

358

self.add()

282

359

except dbus.exceptions.DBusException as error:

283

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

284

self.cleanup()

285

os._exit(1)

286

self.rename_count += 1

360

if (error.get_dbus_name()

361

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

362

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

363

return self.rename(remove=False)

364

else:

365

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

366

self.cleanup()

367

os._exit(1)

287

368

288

369

def remove(self):

289

370

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

327

408

self.rename()

328

409

elif state == avahi.ENTRY_GROUP_FAILURE:

329

410

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

330

unicode(error))

331

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

332

.format(error))

411

str(error))

412

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

333

413

334

414

def cleanup(self):

335

415

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

345

425

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

346

426

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

347

427

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

348

bad_states = { avahi.SERVER_INVALID:

349

"Zeroconf server invalid",

350

avahi.SERVER_REGISTERING: None,

351

avahi.SERVER_COLLISION:

352

"Zeroconf server name collision",

353

avahi.SERVER_FAILURE:

354

"Zeroconf server failure" }

428

bad_states = {

429

avahi.SERVER_INVALID: "Zeroconf server invalid",

430

avahi.SERVER_REGISTERING: None,

431

avahi.SERVER_COLLISION: "Zeroconf server name collision",

432

avahi.SERVER_FAILURE: "Zeroconf server failure",

433

}

355

434

if state in bad_states:

356

435

if bad_states[state] is not None:

357

436

if error is None:

360

439

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

361

440

self.cleanup()

362

441

elif state == avahi.SERVER_RUNNING:

363

self.add()

442

try:

443

self.add()

444

except dbus.exceptions.DBusException as error:

445

if (error.get_dbus_name()

446

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

447

logger.info("Local Zeroconf service name"

448

" collision.")

449

return self.rename(remove=False)

450

else:

451

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

452

self.cleanup()

453

os._exit(1)

364

454

else:

365

455

if error is None:

366

456

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

376

466

follow_name_owner_changes=True),

377

467

avahi.DBUS_INTERFACE_SERVER)

378

468

self.server.connect_to_signal("StateChanged",

379

self.server_state_changed)

469

self.server_state_changed)

380

470

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

381

471

382

472

383

473

class AvahiServiceToSyslog(AvahiService):

384

def rename(self):

474

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

385

475

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

386

ret = AvahiService.rename(self)

387

syslogger.setFormatter(logging.Formatter

388

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

389

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

390

.format(self.name)))

476

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

477

syslogger.setFormatter(logging.Formatter(

478

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

479

.format(self.name)))

391

480

return ret

392

481

393

394

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))

399

482

# Pretend that we have a GnuTLS module

483

class GnuTLS(object):

484

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

485

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

486

487

_library = ctypes.cdll.LoadLibrary(

488

ctypes.util.find_library("gnutls"))

489

_need_version = b"3.3.0"

490

def __init__(self):

491

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

492

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

493

# happens.

494

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

495

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

496

.format(self._need_version))

497

498

# Unless otherwise indicated, the constants and types below are

499

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

500

501

# Constants

502

E_SUCCESS = 0

503

E_INTERRUPTED = -52

504

E_AGAIN = -28

505

CRT_OPENPGP = 2

506

CLIENT = 2

507

SHUT_RDWR = 0

508

CRD_CERTIFICATE = 1

509

E_NO_CERTIFICATE_FOUND = -49

510

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

511

512

# Types

513

class session_int(ctypes.Structure):

514

_fields_ = []

515

session_t = ctypes.POINTER(session_int)

516

class certificate_credentials_st(ctypes.Structure):

517

_fields_ = []

518

certificate_credentials_t = ctypes.POINTER(

519

certificate_credentials_st)

520

certificate_type_t = ctypes.c_int

521

class datum_t(ctypes.Structure):

522

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

523

('size', ctypes.c_uint)]

524

class openpgp_crt_int(ctypes.Structure):

525

_fields_ = []

526

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

527

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

528

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

529

credentials_type_t = ctypes.c_int

530

transport_ptr_t = ctypes.c_void_p

531

close_request_t = ctypes.c_int

532

533

# Exceptions

534

class Error(Exception):

535

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

536

# exception might be raised from within GnuTLS.__init__,

537

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

538

# global variable has happened.

539

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

540

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

541

# code is passed, convert it to a string with

542

# gnutls.strerror()

543

self.code = code

544

if message is None and code is not None:

545

message = GnuTLS.strerror(code)

546

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

547

message, *args)

548

549

class CertificateSecurityError(Error):

550

pass

551

552

# Classes

553

class Credentials(object):

554

def __init__(self):

555

self._c_object = gnutls.certificate_credentials_t()

556

gnutls.certificate_allocate_credentials(

557

ctypes.byref(self._c_object))

558

self.type = gnutls.CRD_CERTIFICATE

559

560

def __del__(self):

561

gnutls.certificate_free_credentials(self._c_object)

562

563

class ClientSession(object):

564

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

565

self._c_object = gnutls.session_t()

566

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

567

gnutls.set_default_priority(self._c_object)

568

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

569

gnutls.handshake_set_private_extensions(self._c_object,

570

True)

571

self.socket = socket

572

if credentials is None:

573

credentials = gnutls.Credentials()

574

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

575

ctypes.cast(credentials._c_object,

576

ctypes.c_void_p))

577

self.credentials = credentials

578

579

def __del__(self):

580

gnutls.deinit(self._c_object)

581

582

def handshake(self):

583

return gnutls.handshake(self._c_object)

584

585

def send(self, data):

586

data = bytes(data)

587

data_len = len(data)

588

while data_len > 0:

589

data_len -= gnutls.record_send(self._c_object,

590

data[-data_len:],

591

data_len)

592

593

def bye(self):

594

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

595

596

# Error handling functions

597

def _error_code(result):

598

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

599

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

600

if result >= 0:

601

return result

602

if result == gnutls.E_NO_CERTIFICATE_FOUND:

603

raise gnutls.CertificateSecurityError(code = result)

604

raise gnutls.Error(code = result)

605

606

def _retry_on_error(result, func, arguments):

607

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

608

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

609

while result < 0:

610

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

611

return _error_code(result)

612

result = func(*arguments)

613

return result

614

615

# Unless otherwise indicated, the function declarations below are

616

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

617

618

# Functions

619

priority_set_direct = _library.gnutls_priority_set_direct

620

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

621

ctypes.POINTER(ctypes.c_char_p)]

622

priority_set_direct.restype = _error_code

623

624

init = _library.gnutls_init

625

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

626

init.restype = _error_code

627

628

set_default_priority = _library.gnutls_set_default_priority

629

set_default_priority.argtypes = [session_t]

630

set_default_priority.restype = _error_code

631

632

record_send = _library.gnutls_record_send

633

record_send.argtypes = [session_t, ctypes.c_void_p,

634

ctypes.c_size_t]

635

record_send.restype = ctypes.c_ssize_t

636

record_send.errcheck = _retry_on_error

637

638

certificate_allocate_credentials = (

639

_library.gnutls_certificate_allocate_credentials)

640

certificate_allocate_credentials.argtypes = [

641

ctypes.POINTER(certificate_credentials_t)]

642

certificate_allocate_credentials.restype = _error_code

643

644

certificate_free_credentials = (

645

_library.gnutls_certificate_free_credentials)

646

certificate_free_credentials.argtypes = [certificate_credentials_t]

647

certificate_free_credentials.restype = None

648

649

handshake_set_private_extensions = (

650

_library.gnutls_handshake_set_private_extensions)

651

handshake_set_private_extensions.argtypes = [session_t,

652

ctypes.c_int]

653

handshake_set_private_extensions.restype = None

654

655

credentials_set = _library.gnutls_credentials_set

656

credentials_set.argtypes = [session_t, credentials_type_t,

657

ctypes.c_void_p]

658

credentials_set.restype = _error_code

659

660

strerror = _library.gnutls_strerror

661

strerror.argtypes = [ctypes.c_int]

662

strerror.restype = ctypes.c_char_p

663

664

certificate_type_get = _library.gnutls_certificate_type_get

665

certificate_type_get.argtypes = [session_t]

666

certificate_type_get.restype = _error_code

667

668

certificate_get_peers = _library.gnutls_certificate_get_peers

669

certificate_get_peers.argtypes = [session_t,

670

ctypes.POINTER(ctypes.c_uint)]

671

certificate_get_peers.restype = ctypes.POINTER(datum_t)

672

673

global_set_log_level = _library.gnutls_global_set_log_level

674

global_set_log_level.argtypes = [ctypes.c_int]

675

global_set_log_level.restype = None

676

677

global_set_log_function = _library.gnutls_global_set_log_function

678

global_set_log_function.argtypes = [log_func]

679

global_set_log_function.restype = None

680

681

deinit = _library.gnutls_deinit

682

deinit.argtypes = [session_t]

683

deinit.restype = None

684

685

handshake = _library.gnutls_handshake

686

handshake.argtypes = [session_t]

687

handshake.restype = _error_code

688

handshake.errcheck = _retry_on_error

689

690

transport_set_ptr = _library.gnutls_transport_set_ptr

691

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

692

transport_set_ptr.restype = None

693

694

bye = _library.gnutls_bye

695

bye.argtypes = [session_t, close_request_t]

696

bye.restype = _error_code

697

bye.errcheck = _retry_on_error

698

699

check_version = _library.gnutls_check_version

700

check_version.argtypes = [ctypes.c_char_p]

701

check_version.restype = ctypes.c_char_p

702

703

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

704

705

openpgp_crt_init = _library.gnutls_openpgp_crt_init

706

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

707

openpgp_crt_init.restype = _error_code

708

709

openpgp_crt_import = _library.gnutls_openpgp_crt_import

710

openpgp_crt_import.argtypes = [openpgp_crt_t,

711

ctypes.POINTER(datum_t),

712

openpgp_crt_fmt_t]

713

openpgp_crt_import.restype = _error_code

714

715

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

716

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

717

ctypes.POINTER(ctypes.c_uint)]

718

openpgp_crt_verify_self.restype = _error_code

719

720

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

721

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

722

openpgp_crt_deinit.restype = None

723

724

openpgp_crt_get_fingerprint = (

725

_library.gnutls_openpgp_crt_get_fingerprint)

726

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

727

ctypes.c_void_p,

728

ctypes.POINTER(

729

ctypes.c_size_t)]

730

openpgp_crt_get_fingerprint.restype = _error_code

731

732

# Remove non-public functions

733

del _error_code, _retry_on_error

734

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

735

gnutls = GnuTLS()

736

737

def call_pipe(connection, # : multiprocessing.Connection

738

func, *args, **kwargs):

739

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

740

741

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

742

return value on the provided multiprocessing.Connection.

743

"""

744

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

745

connection.close()

400

746

401

747

class Client(object):

402

748

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

408

754

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

409

755

to see if the client lives.

410

756

'None' if no process is running.

411

checker_callback_tag: a gobject event source tag, or None

757

checker_callback_tag: a GLib event source tag, or None

412

758

checker_command: string; External command which is run to check

413

759

if client lives. %() expansions are done at

414

760

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

415

761

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

416

checker_initiator_tag: a gobject event source tag, or None

762

checker_initiator_tag: a GLib event source tag, or None

417

763

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

418

764

client_structure: Object describing what attributes a client has

419

765

and is used for storing the client at exit

420

766

current_checker_command: string; current running checker_command

421

disable_initiator_tag: a gobject event source tag, or None

767

disable_initiator_tag: a GLib event source tag, or None

422

768

enabled: bool()

423

769

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

424

770

uniquely identify the client

429

775

last_checker_status: integer between 0 and 255 reflecting exit

430

776

status of last checker. -1 reflects crashed

431

777

checker, -2 means no checker completed yet.

778

last_checker_signal: The signal which killed the last checker, if

779

last_checker_status is -1

432

780

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

433

781

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

434

782

D-Bus identifiers

439

787

runtime_expansions: Allowed attributes for runtime expansion.

440

788

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

441

789

disabled, or None

790

server_settings: The server_settings dict from main()

442

791

"""

443

792

444

793

runtime_expansions = ("approval_delay", "approval_duration",

446

795

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

447

796

"last_approval_request", "last_checked_ok",

448

797

"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)

467

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)

798

client_defaults = {

799

"timeout": "PT5M",

800

"extended_timeout": "PT15M",

801

"interval": "PT2M",

802

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

803

"host": "",

804

"approval_delay": "PT0S",

805

"approval_duration": "PT1S",

806

"approved_by_default": "True",

807

"enabled": "True",

808

}

474

809

475

810

@staticmethod

476

811

def config_parser(config):

492

827

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

493

828

"enabled")

494

829

830

# Uppercase and remove spaces from fingerprint for later

831

# comparison purposes with return value from the

832

# fingerprint() function

495

833

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

496

834

.replace(" ", ""))

497

835

if "secret" in section:

498

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

836

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

837

.encode("utf-8"),

838

"base64")

499

839

elif "secfile" in section:

500

840

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

501

841

(section["secfile"])),

502

842

"rb") as secfile:

503

843

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

504

844

else:

505

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

845

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

506

846

.format(section))

507

847

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

508

848

client["extended_timeout"] = string_to_delta(

519

859

520

860

return settings

521

861

522

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

862

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

523

863

self.name = name

864

if server_settings is None:

865

server_settings = {}

866

self.server_settings = server_settings

524

867

# adding all client settings

525

for setting, value in settings.iteritems():

868

for setting, value in settings.items():

526

869

setattr(self, setting, value)

527

870

528

871

if self.enabled:

536

879

self.expires = None

537

880

538

881

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

882

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

543

883

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

544

884

datetime.datetime.utcnow())

551

891

self.current_checker_command = None

552

892

self.approved = None

553

893

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()

894

self.changedstate = multiprocessing_manager.Condition(

895

multiprocessing_manager.Lock())

896

self.client_structure = [attr

897

for attr in self.__dict__.keys()

559

898

if not attr.startswith("_")]

560

899

self.client_structure.append("client_structure")

561

900

562

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

563

lambda obj:

564

isinstance(obj,

565

property)):

901

for name, t in inspect.getmembers(

902

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

566

903

if not name.startswith("_"):

567

904

self.client_structure.append(name)

568

905

589

926

if not quiet:

590

927

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

591

928

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

592

gobject.source_remove(self.disable_initiator_tag)

929

GLib.source_remove(self.disable_initiator_tag)

593

930

self.disable_initiator_tag = None

594

931

self.expires = None

595

932

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

596

gobject.source_remove(self.checker_initiator_tag)

933

GLib.source_remove(self.checker_initiator_tag)

597

934

self.checker_initiator_tag = None

598

935

self.stop_checker()

599

936

self.enabled = False

600

937

if not quiet:

601

938

self.send_changedstate()

602

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

939

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

603

940

return False

604

941

605

942

def __del__(self):

609

946

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

610

947

# and every interval from then on.

611

948

if self.checker_initiator_tag is not None:

612

gobject.source_remove(self.checker_initiator_tag)

613

self.checker_initiator_tag = (gobject.timeout_add

614

(self.interval_milliseconds(),

615

self.start_checker))

949

GLib.source_remove(self.checker_initiator_tag)

950

self.checker_initiator_tag = GLib.timeout_add(

951

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

952

self.start_checker)

616

953

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

617

954

if self.disable_initiator_tag is not None:

618

gobject.source_remove(self.disable_initiator_tag)

619

self.disable_initiator_tag = (gobject.timeout_add

620

(self.timeout_milliseconds(),

621

self.disable))

955

GLib.source_remove(self.disable_initiator_tag)

956

self.disable_initiator_tag = GLib.timeout_add(

957

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

622

958

# Also start a new checker *right now*.

623

959

self.start_checker()

624

960

625

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

961

def checker_callback(self, source, condition, connection,

962

command):

626

963

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

627

964

self.checker_callback_tag = None

628

965

self.checker = None

629

if os.WIFEXITED(condition):

630

self.last_checker_status = os.WEXITSTATUS(condition)

966

# Read return code from connection (see call_pipe)

967

returncode = connection.recv()

968

connection.close()

969

970

if returncode >= 0:

971

self.last_checker_status = returncode

972

self.last_checker_signal = None

631

973

if self.last_checker_status == 0:

632

974

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

633

975

vars(self))

634

976

self.checked_ok()

635

977

else:

636

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

637

vars(self))

978

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

638

979

else:

639

980

self.last_checker_status = -1

981

self.last_checker_signal = -returncode

640

982

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

641

983

vars(self))

984

return False

642

985

643

986

def checked_ok(self):

644

987

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

645

988

self.last_checked_ok = datetime.datetime.utcnow()

646

989

self.last_checker_status = 0

990

self.last_checker_signal = None

647

991

self.bump_timeout()

648

992

649

993

def bump_timeout(self, timeout=None):

651

995

if timeout is None:

652

996

timeout = self.timeout

653

997

if self.disable_initiator_tag is not None:

654

gobject.source_remove(self.disable_initiator_tag)

998

GLib.source_remove(self.disable_initiator_tag)

655

999

self.disable_initiator_tag = None

656

1000

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

657

self.disable_initiator_tag = (gobject.timeout_add

658

(timedelta_to_milliseconds

659

(timeout), self.disable))

1001

self.disable_initiator_tag = GLib.timeout_add(

1002

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

660

1003

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

661

1004

662

1005

def need_approval(self):

676

1019

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

677

1020

# should be.

678

1021

679

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

680

try:

681

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

686

else:

687

if pid:

688

logger.warning("Checker was a zombie")

689

gobject.source_remove(self.checker_callback_tag)

690

self.checker_callback(pid, status,

691

self.current_checker_command)

1022

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

1023

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

1024

self.checker.join()

1025

self.checker = None

692

1026

# Start a new checker if needed

693

1027

if self.checker is None:

694

1028

# 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)

1029

escaped_attrs = {

1030

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

1031

for attr in self.runtime_expansions }

699

1032

try:

700

1033

command = self.checker_command % escaped_attrs

701

1034

except TypeError as error:

702

1035

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

703

self.checker_command, exc_info=error)

704

return True # Try again later

1036

self.checker_command,

1037

exc_info=error)

1038

return True # Try again later

705

1039

self.current_checker_command = command

706

try:

707

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

708

command, self.name)

709

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

710

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

711

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

712

# always replaced by /dev/null.)

713

self.checker = subprocess.Popen(command,

714

close_fds=True,

715

shell=True, cwd="/")

716

except OSError as error:

717

logger.error("Failed to start subprocess",

718

exc_info=error)

719

self.checker_callback_tag = (gobject.child_watch_add

720

(self.checker.pid,

721

self.checker_callback,

722

data=command))

723

# The checker may have completed before the gobject

724

# watch was added. Check for this.

725

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

726

if pid:

727

gobject.source_remove(self.checker_callback_tag)

728

self.checker_callback(pid, status, command)

729

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

1040

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

1041

self.name)

1042

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

1043

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

1044

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

1045

# always replaced by /dev/null.)

1046

# The exception is when not debugging but nevertheless

1047

# running in the foreground; use the previously

1048

# created wnull.

1049

popen_args = { "close_fds": True,

1050

"shell": True,

1051

"cwd": "/" }

1052

if (not self.server_settings["debug"]

1053

and self.server_settings["foreground"]):

1054

popen_args.update({"stdout": wnull,

1055

"stderr": wnull })

1056

pipe = multiprocessing.Pipe(duplex = False)

1057

self.checker = multiprocessing.Process(

1058

target = call_pipe,

1059

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

1060

kwargs = popen_args)

1061

self.checker.start()

1062

self.checker_callback_tag = GLib.io_add_watch(

1063

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

1064

self.checker_callback, pipe[0], command)

1065

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

730

1066

return True

731

1067

732

1068

def stop_checker(self):

733

1069

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

734

1070

if self.checker_callback_tag:

735

gobject.source_remove(self.checker_callback_tag)

1071

GLib.source_remove(self.checker_callback_tag)

736

1072

self.checker_callback_tag = None

737

1073

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

738

1074

return

739

1075

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

740

try:

741

self.checker.terminate()

742

#time.sleep(0.5)

743

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

744

# self.checker.kill()

745

except OSError as error:

746

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

747

raise

1076

self.checker.terminate()

748

1077

self.checker = None

749

1078

750

1079

751

def dbus_service_property(dbus_interface, signature="v",

752

access="readwrite", byte_arrays=False):

1080

def dbus_service_property(dbus_interface,

1081

signature="v",

1082

access="readwrite",

1083

byte_arrays=False):

753

1084

"""Decorators for marking methods of a DBusObjectWithProperties to

754

1085

become properties on the D-Bus.

755

1086

764

1095

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

765

1096

if byte_arrays and signature != "ay":

766

1097

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

767

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

1098

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

1099

768

1100

def decorator(func):

769

1101

func._dbus_is_property = True

770

1102

func._dbus_interface = dbus_interface

775

1107

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

776

1108

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

777

1109

return func

1110

778

1111

return decorator

779

1112

780

1113

789

1122

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

790

1123

"false"}

791

1124

"""

1125

792

1126

def decorator(func):

793

1127

func._dbus_is_interface = True

794

1128

func._dbus_interface = dbus_interface

795

1129

func._dbus_name = dbus_interface

796

1130

return func

1131

797

1132

return decorator

798

1133

799

1134

801

1136

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

802

1137

Usage:

803

1138

1139

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

1140

"org.freedesktop.DBus.Property."

1141

"EmitsChangedSignal": "false"})

804

1142

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

805

1143

access="r")

806

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

807

"org.freedesktop.DBus.Property."

808

"EmitsChangedSignal": "false"})

809

1144

def Property_dbus_property(self):

810

1145

return dbus.Boolean(False)

1146

1147

See also the DBusObjectWithAnnotations class.

811

1148

"""

1149

812

1150

def decorator(func):

813

1151

func._dbus_annotations = annotations

814

1152

return func

1153

815

1154

return decorator

816

1155

817

1156

818

1157

class DBusPropertyException(dbus.exceptions.DBusException):

819

1158

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

820

1159

"""

821

def __unicode__(self):

822

return unicode(str(self))

1160

pass

823

1161

824

1162

825

1163

class DBusPropertyAccessException(DBusPropertyException):

834

1172

pass

835

1173

836

1174

837

class DBusObjectWithProperties(dbus.service.Object):

838

"""A D-Bus object with properties.

1175

class DBusObjectWithAnnotations(dbus.service.Object):

1176

"""A D-Bus object with annotations.

839

1177

840

Classes inheriting from this can use the dbus_service_property

841

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

842

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

1178

Classes inheriting from this can use the dbus_annotations

1179

decorator to add annotations to methods or signals.

843

1180

"""

844

1181

845

1182

@staticmethod

849

1186

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

850

1187

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

851

1188

"""

852

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

1189

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

853

1190

False)

854

1191

855

1192

def _get_all_dbus_things(self, thing):

856

1193

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

857

1194

"""

858

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

859

name),

1195

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

860

1196

athing.__get__(self))

861

1197

for cls in self.__class__.__mro__

862

1198

for name, athing in

863

inspect.getmembers(cls,

864

self._is_dbus_thing(thing)))

1199

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

1200

1201

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1202

out_signature = "s",

1203

path_keyword = 'object_path',

1204

connection_keyword = 'connection')

1205

def Introspect(self, object_path, connection):

1206

"""Overloading of standard D-Bus method.

1207

1208

Inserts annotation tags on methods and signals.

1209

"""

1210

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

1211

connection)

1212

try:

1213

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

1214

1215

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

1216

# Add annotation tags

1217

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

1218

for tag in if_tag.getElementsByTagName(typ):

1219

annots = dict()

1220

for name, prop in (self.

1221

_get_all_dbus_things(typ)):

1222

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

1223

and prop._dbus_interface

1224

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

1225

annots.update(getattr(

1226

prop, "_dbus_annotations", {}))

1227

for name, value in annots.items():

1228

ann_tag = document.createElement(

1229

"annotation")

1230

ann_tag.setAttribute("name", name)

1231

ann_tag.setAttribute("value", value)

1232

tag.appendChild(ann_tag)

1233

# Add interface annotation tags

1234

for annotation, value in dict(

1235

itertools.chain.from_iterable(

1236

annotations().items()

1237

for name, annotations

1238

in self._get_all_dbus_things("interface")

1239

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

1240

)).items():

1241

ann_tag = document.createElement("annotation")

1242

ann_tag.setAttribute("name", annotation)

1243

ann_tag.setAttribute("value", value)

1244

if_tag.appendChild(ann_tag)

1245

# Fix argument name for the Introspect method itself

1246

if (if_tag.getAttribute("name")

1247

== dbus.INTROSPECTABLE_IFACE):

1248

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

1249

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

1250

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

1251

if (arg.getAttribute("direction")

1252

== "out"):

1253

arg.setAttribute("name",

1254

"xml_data")

1255

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

1256

document.unlink()

1257

except (AttributeError, xml.dom.DOMException,

1258

xml.parsers.expat.ExpatError) as error:

1259

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

1260

exc_info=error)

1261

return xmlstring

1262

1263

1264

class DBusObjectWithProperties(DBusObjectWithAnnotations):

1265

"""A D-Bus object with properties.

1266

1267

Classes inheriting from this can use the dbus_service_property

1268

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

1269

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

1270

"""

865

1271

866

1272

def _get_dbus_property(self, interface_name, property_name):

867

1273

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

868

1274

property with the specified name and interface.

869

1275

"""

870

for cls in self.__class__.__mro__:

871

for name, value in (inspect.getmembers

872

(cls,

873

self._is_dbus_thing("property"))):

1276

for cls in self.__class__.__mro__:

1277

for name, value in inspect.getmembers(

1278

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

874

1279

if (value._dbus_name == property_name

875

1280

and value._dbus_interface == interface_name):

876

1281

return value.__get__(self)

877

1282

878

1283

# No such property

879

raise DBusPropertyNotFound(self.dbus_object_path + ":"

880

+ interface_name + "."

881

+ property_name)

882

883

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

1284

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

1285

self.dbus_object_path, interface_name, property_name))

1286

1287

@classmethod

1288

def _get_all_interface_names(cls):

1289

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

1290

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

1291

"_dbus_interface", None)

1292

for x in (inspect.getmro(cls))

1293

for attr in dir(x))

1294

if name is not None)

1295

1296

@dbus.service.method(dbus.PROPERTIES_IFACE,

1297

in_signature="ss",

884

1298

out_signature="v")

885

1299

def Get(self, interface_name, property_name):

886

1300

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

904

1318

# The byte_arrays option is not supported yet on

905

1319

# signatures other than "ay".

906

1320

if prop._dbus_signature != "ay":

907

raise ValueError

1321

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

1322

"'ay' signature {!r}"

1323

.format(prop._dbus_signature))

908

1324

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

909

1325

for byte in value))

910

1326

prop(value)

911

1327

912

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

1328

@dbus.service.method(dbus.PROPERTIES_IFACE,

1329

in_signature="s",

913

1330

out_signature="a{sv}")

914

1331

def GetAll(self, interface_name):

915

1332

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

930

1347

if not hasattr(value, "variant_level"):

931

1348

properties[name] = value

932

1349

continue

933

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

934

value.variant_level+1)

1350

properties[name] = type(value)(

1351

value, variant_level = value.variant_level + 1)

935

1352

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

936

1353

1354

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

1355

def PropertiesChanged(self, interface_name, changed_properties,

1356

invalidated_properties):

1357

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

1358

standard.

1359

"""

1360

pass

1361

937

1362

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

938

1363

out_signature="s",

939

1364

path_keyword='object_path',

943

1368

944

1369

Inserts property tags and interface annotation tags.

945

1370

"""

946

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

947

connection)

1371

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1372

object_path,

1373

connection)

948

1374

try:

949

1375

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

1376

950

1377

def make_tag(document, name, prop):

951

1378

e = document.createElement("property")

952

1379

e.setAttribute("name", name)

953

1380

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

954

1381

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

955

1382

return e

1383

956

1384

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

957

1385

# Add property tags

958

1386

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

961

1389

if prop._dbus_interface

962

1390

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

963

1391

if_tag.appendChild(tag)

964

# Add annotation tags

965

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

966

for tag in if_tag.getElementsByTagName(typ):

967

annots = dict()

968

for name, prop in (self.

969

_get_all_dbus_things(typ)):

970

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

971

and prop._dbus_interface

972

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

973

annots.update(getattr

974

(prop,

975

"_dbus_annotations",

976

{}))

977

for name, value in annots.iteritems():

978

ann_tag = document.createElement(

979

"annotation")

980

ann_tag.setAttribute("name", name)

981

ann_tag.setAttribute("value", value)

982

tag.appendChild(ann_tag)

983

# Add interface annotation tags

984

for annotation, value in dict(

985

itertools.chain.from_iterable(

986

annotations().iteritems()

987

for name, annotations in

988

self._get_all_dbus_things("interface")

989

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

990

)).iteritems():

991

ann_tag = document.createElement("annotation")

992

ann_tag.setAttribute("name", annotation)

993

ann_tag.setAttribute("value", value)

994

if_tag.appendChild(ann_tag)

1392

# Add annotation tags for properties

1393

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

1394

annots = dict()

1395

for name, prop in self._get_all_dbus_things(

1396

"property"):

1397

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

1398

and prop._dbus_interface

1399

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

1400

annots.update(getattr(

1401

prop, "_dbus_annotations", {}))

1402

for name, value in annots.items():

1403

ann_tag = document.createElement(

1404

"annotation")

1405

ann_tag.setAttribute("name", name)

1406

ann_tag.setAttribute("value", value)

1407

tag.appendChild(ann_tag)

995

1408

# Add the names to the return values for the

996

1409

# "org.freedesktop.DBus.Properties" methods

997

1410

if (if_tag.getAttribute("name")

1015

1428

exc_info=error)

1016

1429

return xmlstring

1017

1430

1018

1019

def datetime_to_dbus (dt, variant_level=0):

1431

try:

1432

dbus.OBJECT_MANAGER_IFACE

1433

except AttributeError:

1434

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

1435

1436

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1437

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

1438

1439

Classes inheriting from this exposes the standard

1440

GetManagedObjects call and the InterfacesAdded and

1441

InterfacesRemoved signals on the standard

1442

"org.freedesktop.DBus.ObjectManager" interface.

1443

1444

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

1445

manually.

1446

"""

1447

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1448

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

1449

def GetManagedObjects(self):

1450

"""This function must be overridden"""

1451

raise NotImplementedError()

1452

1453

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1454

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

1455

def InterfacesAdded(self, object_path, interfaces_and_properties):

1456

pass

1457

1458

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

1459

def InterfacesRemoved(self, object_path, interfaces):

1460

pass

1461

1462

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1463

out_signature = "s",

1464

path_keyword = 'object_path',

1465

connection_keyword = 'connection')

1466

def Introspect(self, object_path, connection):

1467

"""Overloading of standard D-Bus method.

1468

1469

Override return argument name of GetManagedObjects to be

1470

"objpath_interfaces_and_properties"

1471

"""

1472

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1473

object_path,

1474

connection)

1475

try:

1476

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

1477

1478

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

1479

# Fix argument name for the GetManagedObjects method

1480

if (if_tag.getAttribute("name")

1481

== dbus.OBJECT_MANAGER_IFACE):

1482

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

1483

if (cn.getAttribute("name")

1484

== "GetManagedObjects"):

1485

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

1486

if (arg.getAttribute("direction")

1487

== "out"):

1488

arg.setAttribute(

1489

"name",

1490

"objpath_interfaces"

1491

"_and_properties")

1492

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

1493

document.unlink()

1494

except (AttributeError, xml.dom.DOMException,

1495

xml.parsers.expat.ExpatError) as error:

1496

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

1497

exc_info = error)

1498

return xmlstring

1499

1500

def datetime_to_dbus(dt, variant_level=0):

1020

1501

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

1021

1502

if dt is None:

1022

1503

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

1023

return dbus.String(dt.isoformat(),

1024

variant_level=variant_level)

1504

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

1025

1505

1026

1506

1027

1507

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1030

1510

interface names according to the "alt_interface_names" mapping.

1031

1511

Usage:

1032

1512

1033

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

1034

"net.example.AlternateInterface"})

1513

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

1514

"net.example.AlternateInterface"})

1035

1515

class SampleDBusObject(dbus.service.Object):

1036

1516

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

1037

1517

def SampleDBusMethod():

1047

1527

(from DBusObjectWithProperties) and interfaces (from the

1048

1528

dbus_interface_annotations decorator).

1049

1529

"""

1530

1050

1531

def wrapper(cls):

1051

1532

for orig_interface_name, alt_interface_name in (

1052

alt_interface_names.iteritems()):

1533

alt_interface_names.items()):

1053

1534

attr = {}

1054

1535

interface_names = set()

1055

1536

# Go though all attributes of the class

1057

1538

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

1058

1539

# with the wrong interface name

1059

1540

if (not hasattr(attribute, "_dbus_interface")

1060

or not attribute._dbus_interface

1061

.startswith(orig_interface_name)):

1541

or not attribute._dbus_interface.startswith(

1542

orig_interface_name)):

1062

1543

continue

1063

1544

# Create an alternate D-Bus interface name based on

1064

1545

# the current name

1065

alt_interface = (attribute._dbus_interface

1066

.replace(orig_interface_name,

1067

alt_interface_name))

1546

alt_interface = attribute._dbus_interface.replace(

1547

orig_interface_name, alt_interface_name)

1068

1548

interface_names.add(alt_interface)

1069

1549

# Is this a D-Bus signal?

1070

1550

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

1071

# Extract the original non-method function by

1072

# black magic

1073

nonmethod_func = (dict(

1551

# Extract the original non-method undecorated

1552

# function by black magic

1553

if sys.version_info.major == 2:

1554

nonmethod_func = (dict(

1074

1555

zip(attribute.func_code.co_freevars,

1075

attribute.__closure__))["func"]

1076

.cell_contents)

1556

attribute.__closure__))

1557

["func"].cell_contents)

1558

else:

1559

nonmethod_func = (dict(

1560

zip(attribute.__code__.co_freevars,

1561

attribute.__closure__))

1562

["func"].cell_contents)

1077

1563

# Create a new, but exactly alike, function

1078

1564

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

1079

1565

# with the alternate D-Bus interface name

1080

new_function = (dbus.service.signal

1081

(alt_interface,

1082

attribute._dbus_signature)

1083

(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)))

1566

new_function = copy_function(nonmethod_func)

1567

new_function = (dbus.service.signal(

1568

alt_interface,

1569

attribute._dbus_signature)(new_function))

1089

1570

# Copy annotations, if any

1090

1571

try:

1091

new_function._dbus_annotations = (

1092

dict(attribute._dbus_annotations))

1572

new_function._dbus_annotations = dict(

1573

attribute._dbus_annotations)

1093

1574

except AttributeError:

1094

1575

pass

1095

1576

# Define a creator of a function to call both the

1100

1581

"""This function is a scope container to pass

1101

1582

func1 and func2 to the "call_both" function

1102

1583

outside of its arguments"""

1584

1585

@functools.wraps(func2)

1103

1586

def call_both(*args, **kwargs):

1104

1587

"""This function will emit two D-Bus

1105

1588

signals by calling func1 and func2"""

1106

1589

func1(*args, **kwargs)

1107

1590

func2(*args, **kwargs)

1591

# Make wrapper function look like a D-Bus signal

1592

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

1593

if name.startswith("_dbus_"):

1594

setattr(call_both, name, attr)

1595

1108

1596

return call_both

1109

1597

# Create the "call_both" function and add it to

1110

1598

# the class

1115

1603

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

1116

1604

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

1117

1605

# 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)))

1606

attr[attrname] = (

1607

dbus.service.method(

1608

alt_interface,

1609

attribute._dbus_in_signature,

1610

attribute._dbus_out_signature)

1611

(copy_function(attribute)))

1128

1612

# Copy annotations, if any

1129

1613

try:

1130

attr[attrname]._dbus_annotations = (

1131

dict(attribute._dbus_annotations))

1614

attr[attrname]._dbus_annotations = dict(

1615

attribute._dbus_annotations)

1132

1616

except AttributeError:

1133

1617

pass

1134

1618

# Is this a D-Bus property?

1137

1621

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

1138

1622

# property with the alternate D-Bus interface

1139

1623

# 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)))

1624

attr[attrname] = (dbus_service_property(

1625

alt_interface, attribute._dbus_signature,

1626

attribute._dbus_access,

1627

attribute._dbus_get_args_options

1628

["byte_arrays"])

1629

(copy_function(attribute)))

1153

1630

# Copy annotations, if any

1154

1631

try:

1155

attr[attrname]._dbus_annotations = (

1156

dict(attribute._dbus_annotations))

1632

attr[attrname]._dbus_annotations = dict(

1633

attribute._dbus_annotations)

1157

1634

except AttributeError:

1158

1635

pass

1159

1636

# Is this a D-Bus interface?

1162

1639

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

1163

1640

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

1164

1641

# 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)))

1642

attr[attrname] = (

1643

dbus_interface_annotations(alt_interface)

1644

(copy_function(attribute)))

1173

1645

if deprecate:

1174

1646

# Deprecate all alternate interfaces

1175

iname="_AlternateDBusNames_interface_annotation{0}"

1647

iname="_AlternateDBusNames_interface_annotation{}"

1176

1648

for interface_name in interface_names:

1649

1177

1650

@dbus_interface_annotations(interface_name)

1178

1651

def func(self):

1179

1652

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

1180

"true" }

1653

"true" }

1181

1654

# Find an unused name

1182

1655

for aname in (iname.format(i)

1183

1656

for i in itertools.count()):

1187

1660

if interface_names:

1188

1661

# Replace the class with a new subclass of it with

1189

1662

# methods, signals, etc. as created above.

1190

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

1191

(cls,), attr)

1663

if sys.version_info.major == 2:

1664

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

1665

(cls, ), attr)

1666

else:

1667

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

1668

(cls, ), attr)

1192

1669

return cls

1670

1193

1671

return wrapper

1194

1672

1195

1673

1196

1674

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

1197

"se.bsnet.fukt.Mandos"})

1675

"se.bsnet.fukt.Mandos"})

1198

1676

class ClientDBus(Client, DBusObjectWithProperties):

1199

1677

"""A Client class using D-Bus

1200

1678

1204

1682

"""

1205

1683

1206

1684

runtime_expansions = (Client.runtime_expansions

1207

+ ("dbus_object_path",))

1685

+ ("dbus_object_path", ))

1686

1687

_interface = "se.recompile.Mandos.Client"

1208

1688

1209

1689

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

1210

1690

1213

1693

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

1214

1694

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

1215

1695

# the D-Bus

1216

client_object_name = unicode(self.name).translate(

1696

client_object_name = str(self.name).translate(

1217

1697

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

1218

1698

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

1219

self.dbus_object_path = (dbus.ObjectPath

1220

("/clients/" + client_object_name))

1699

self.dbus_object_path = dbus.ObjectPath(

1700

"/clients/" + client_object_name)

1221

1701

DBusObjectWithProperties.__init__(self, self.bus,

1222

1702

self.dbus_object_path)

1223

1703

1224

def notifychangeproperty(transform_func,

1225

dbus_name, type_func=lambda x: x,

1226

variant_level=1):

1704

def notifychangeproperty(transform_func, dbus_name,

1705

type_func=lambda x: x,

1706

variant_level=1,

1707

invalidate_only=False,

1708

_interface=_interface):

1227

1709

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

1228

1710

its changes to DBus.

1229

1711

1234

1716

to the D-Bus. Default: no transform

1235

1717

variant_level: D-Bus variant level. Default: 1

1236

1718

"""

1237

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

1719

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

1720

1238

1721

def setter(self, value):

1239

1722

if hasattr(self, "dbus_object_path"):

1240

1723

if (not hasattr(self, attrname) or

1241

1724

type_func(getattr(self, attrname, None))

1242

1725

!= 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)

1726

if invalidate_only:

1727

self.PropertiesChanged(

1728

_interface, dbus.Dictionary(),

1729

dbus.Array((dbus_name, )))

1730

else:

1731

dbus_value = transform_func(

1732

type_func(value),

1733

variant_level = variant_level)

1734

self.PropertyChanged(dbus.String(dbus_name),

1735

dbus_value)

1736

self.PropertiesChanged(

1737

_interface,

1738

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

1739

dbus_value }),

1740

dbus.Array())

1248

1741

setattr(self, attrname, value)

1249

1742

1250

1743

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

1256

1749

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

1257

1750

last_enabled = notifychangeproperty(datetime_to_dbus,

1258

1751

"LastEnabled")

1259

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

1260

type_func = lambda checker:

1261

checker is not None)

1752

checker = notifychangeproperty(

1753

dbus.Boolean, "CheckerRunning",

1754

type_func = lambda checker: checker is not None)

1262

1755

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1263

1756

"LastCheckedOK")

1264

1757

last_checker_status = notifychangeproperty(dbus.Int16,

1267

1760

datetime_to_dbus, "LastApprovalRequest")

1268

1761

approved_by_default = notifychangeproperty(dbus.Boolean,

1269

1762

"ApprovedByDefault")

1270

approval_delay = notifychangeproperty(dbus.UInt64,

1271

"ApprovalDelay",

1272

type_func =

1273

timedelta_to_milliseconds)

1763

approval_delay = notifychangeproperty(

1764

dbus.UInt64, "ApprovalDelay",

1765

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

1274

1766

approval_duration = notifychangeproperty(

1275

1767

dbus.UInt64, "ApprovalDuration",

1276

type_func = timedelta_to_milliseconds)

1768

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

1277

1769

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

1278

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

1279

type_func =

1280

timedelta_to_milliseconds)

1770

timeout = notifychangeproperty(

1771

dbus.UInt64, "Timeout",

1772

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

1281

1773

extended_timeout = notifychangeproperty(

1282

1774

dbus.UInt64, "ExtendedTimeout",

1283

type_func = timedelta_to_milliseconds)

1284

interval = notifychangeproperty(dbus.UInt64,

1285

"Interval",

1286

type_func =

1287

timedelta_to_milliseconds)

1775

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

1776

interval = notifychangeproperty(

1777

dbus.UInt64, "Interval",

1778

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

1288

1779

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

1780

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

1781

invalidate_only=True)

1289

1782

1290

1783

del notifychangeproperty

1291

1784

1298

1791

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

1299

1792

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

1300

1793

1301

def checker_callback(self, pid, condition, command,

1302

*args, **kwargs):

1303

self.checker_callback_tag = None

1304

self.checker = None

1305

if os.WIFEXITED(condition):

1306

exitstatus = os.WEXITSTATUS(condition)

1794

def checker_callback(self, source, condition,

1795

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

1796

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

1797

connection, command, *args,

1798

**kwargs)

1799

exitstatus = self.last_checker_status

1800

if exitstatus >= 0:

1307

1801

# Emit D-Bus signal

1308

1802

self.CheckerCompleted(dbus.Int16(exitstatus),

1309

dbus.Int64(condition),

1803

# This is specific to GNU libC

1804

dbus.Int64(exitstatus << 8),

1310

1805

dbus.String(command))

1311

1806

else:

1312

1807

# Emit D-Bus signal

1313

1808

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

1314

dbus.Int64(condition),

1809

dbus.Int64(

1810

# This is specific to GNU libC

1811

(exitstatus << 8)

1812

| self.last_checker_signal),

1315

1813

dbus.String(command))

1316

1317

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

1318

*args, **kwargs)

1814

return ret

1319

1815

1320

1816

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

1817

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

1326

1818

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

1327

1819

# Only if new checker process was started

1328

1820

if (self.checker is not None

1337

1829

1338

1830

def approve(self, value=True):

1339

1831

self.approved = value

1340

gobject.timeout_add(timedelta_to_milliseconds

1341

(self.approval_duration),

1342

self._reset_approved)

1832

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

1833

* 1000), self._reset_approved)

1343

1834

self.send_changedstate()

1344

1835

1345

1836

## D-Bus methods, signals & properties

1346

_interface = "se.recompile.Mandos.Client"

1347

1837

1348

1838

## Interfaces

1349

1839

1350

@dbus_interface_annotations(_interface)

1351

def _foo(self):

1352

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

1353

"false"}

1354

1355

1840

## Signals

1356

1841

1357

1842

# CheckerCompleted - signal

1367

1852

pass

1368

1853

1369

1854

# PropertyChanged - signal

1855

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

1370

1856

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

1371

1857

def PropertyChanged(self, property, value):

1372

1858

"D-Bus signal"

1406

1892

self.checked_ok()

1407

1893

1408

1894

# Enable - method

1895

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

1409

1896

@dbus.service.method(_interface)

1410

1897

def Enable(self):

1411

1898

"D-Bus method"

1412

1899

self.enable()

1413

1900

1414

1901

# StartChecker - method

1902

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

1415

1903

@dbus.service.method(_interface)

1416

1904

def StartChecker(self):

1417

1905

"D-Bus method"

1418

1906

self.start_checker()

1419

1907

1420

1908

# Disable - method

1909

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

1421

1910

@dbus.service.method(_interface)

1422

1911

def Disable(self):

1423

1912

"D-Bus method"

1424

1913

self.disable()

1425

1914

1426

1915

# StopChecker - method

1916

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

1427

1917

@dbus.service.method(_interface)

1428

1918

def StopChecker(self):

1429

1919

self.stop_checker()

1436

1926

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

1437

1927

1438

1928

# ApprovedByDefault - property

1439

@dbus_service_property(_interface, signature="b",

1929

@dbus_service_property(_interface,

1930

signature="b",

1440

1931

access="readwrite")

1441

1932

def ApprovedByDefault_dbus_property(self, value=None):

1442

1933

if value is None: # get

1444

1935

self.approved_by_default = bool(value)

1445

1936

1446

1937

# ApprovalDelay - property

1447

@dbus_service_property(_interface, signature="t",

1938

@dbus_service_property(_interface,

1939

signature="t",

1448

1940

access="readwrite")

1449

1941

def ApprovalDelay_dbus_property(self, value=None):

1450

1942

if value is None: # get

1451

return dbus.UInt64(self.approval_delay_milliseconds())

1943

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

1944

* 1000)

1452

1945

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

1453

1946

1454

1947

# ApprovalDuration - property

1455

@dbus_service_property(_interface, signature="t",

1948

@dbus_service_property(_interface,

1949

signature="t",

1456

1950

access="readwrite")

1457

1951

def ApprovalDuration_dbus_property(self, value=None):

1458

1952

if value is None: # get

1459

return dbus.UInt64(timedelta_to_milliseconds(

1460

self.approval_duration))

1953

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

1954

* 1000)

1461

1955

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

1462

1956

1463

1957

# Name - property

1958

@dbus_annotations(

1959

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

1464

1960

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

1465

1961

def Name_dbus_property(self):

1466

1962

return dbus.String(self.name)

1467

1963

1468

1964

# Fingerprint - property

1965

@dbus_annotations(

1966

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

1469

1967

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

1470

1968

def Fingerprint_dbus_property(self):

1471

1969

return dbus.String(self.fingerprint)

1472

1970

1473

1971

# Host - property

1474

@dbus_service_property(_interface, signature="s",

1972

@dbus_service_property(_interface,

1973

signature="s",

1475

1974

access="readwrite")

1476

1975

def Host_dbus_property(self, value=None):

1477

1976

if value is None: # get

1478

1977

return dbus.String(self.host)

1479

self.host = unicode(value)

1978

self.host = str(value)

1480

1979

1481

1980

# Created - property

1981

@dbus_annotations(

1982

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

1482

1983

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

1483

1984

def Created_dbus_property(self):

1484

1985

return datetime_to_dbus(self.created)

1489

1990

return datetime_to_dbus(self.last_enabled)

1490

1991

1491

1992

# Enabled - property

1492

@dbus_service_property(_interface, signature="b",

1993

@dbus_service_property(_interface,

1994

signature="b",

1493

1995

access="readwrite")

1494

1996

def Enabled_dbus_property(self, value=None):

1495

1997

if value is None: # get

1500

2002

self.disable()

1501

2003

1502

2004

# LastCheckedOK - property

1503

@dbus_service_property(_interface, signature="s",

2005

@dbus_service_property(_interface,

2006

signature="s",

1504

2007

access="readwrite")

1505

2008

def LastCheckedOK_dbus_property(self, value=None):

1506

2009

if value is not None:

1509

2012

return datetime_to_dbus(self.last_checked_ok)

1510

2013

1511

2014

# LastCheckerStatus - property

1512

@dbus_service_property(_interface, signature="n",

1513

access="read")

2015

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

1514

2016

def LastCheckerStatus_dbus_property(self):

1515

2017

return dbus.Int16(self.last_checker_status)

1516

2018

1525

2027

return datetime_to_dbus(self.last_approval_request)

1526

2028

1527

2029

# Timeout - property

1528

@dbus_service_property(_interface, signature="t",

2030

@dbus_service_property(_interface,

2031

signature="t",

1529

2032

access="readwrite")

1530

2033

def Timeout_dbus_property(self, value=None):

1531

2034

if value is None: # get

1532

return dbus.UInt64(self.timeout_milliseconds())

2035

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

1533

2036

old_timeout = self.timeout

1534

2037

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

1535

2038

# Reschedule disabling

1543

2046

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

1544

2047

is None):

1545

2048

return

1546

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))

2049

GLib.source_remove(self.disable_initiator_tag)

2050

self.disable_initiator_tag = GLib.timeout_add(

2051

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

2052

self.disable)

1551

2053

1552

2054

# ExtendedTimeout - property

1553

@dbus_service_property(_interface, signature="t",

2055

@dbus_service_property(_interface,

2056

signature="t",

1554

2057

access="readwrite")

1555

2058

def ExtendedTimeout_dbus_property(self, value=None):

1556

2059

if value is None: # get

1557

return dbus.UInt64(self.extended_timeout_milliseconds())

2060

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

2061

* 1000)

1558

2062

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

1559

2063

1560

2064

# Interval - property

1561

@dbus_service_property(_interface, signature="t",

2065

@dbus_service_property(_interface,

2066

signature="t",

1562

2067

access="readwrite")

1563

2068

def Interval_dbus_property(self, value=None):

1564

2069

if value is None: # get

1565

return dbus.UInt64(self.interval_milliseconds())

2070

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

1566

2071

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

1567

2072

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

1568

2073

return

1569

2074

if self.enabled:

1570

2075

# Reschedule checker run

1571

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

2076

GLib.source_remove(self.checker_initiator_tag)

2077

self.checker_initiator_tag = GLib.timeout_add(

2078

value, self.start_checker)

2079

self.start_checker() # Start one now, too

1575

2080

1576

2081

# Checker - property

1577

@dbus_service_property(_interface, signature="s",

2082

@dbus_service_property(_interface,

2083

signature="s",

1578

2084

access="readwrite")

1579

2085

def Checker_dbus_property(self, value=None):

1580

2086

if value is None: # get

1581

2087

return dbus.String(self.checker_command)

1582

self.checker_command = unicode(value)

2088

self.checker_command = str(value)

1583

2089

1584

2090

# CheckerRunning - property

1585

@dbus_service_property(_interface, signature="b",

2091

@dbus_service_property(_interface,

2092

signature="b",

1586

2093

access="readwrite")

1587

2094

def CheckerRunning_dbus_property(self, value=None):

1588

2095

if value is None: # get

1593

2100

self.stop_checker()

1594

2101

1595

2102

# ObjectPath - property

2103

@dbus_annotations(

2104

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

2105

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

1596

2106

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

1597

2107

def ObjectPath_dbus_property(self):

1598

2108

return self.dbus_object_path # is already a dbus.ObjectPath

1599

2109

1600

2110

# Secret = property

1601

@dbus_service_property(_interface, signature="ay",

1602

access="write", byte_arrays=True)

2111

@dbus_annotations(

2112

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

2113

"invalidates"})

2114

@dbus_service_property(_interface,

2115

signature="ay",

2116

access="write",

2117

byte_arrays=True)

1603

2118

def Secret_dbus_property(self, value):

1604

self.secret = str(value)

2119

self.secret = bytes(value)

1605

2120

1606

2121

del _interface

1607

2122

1611

2126

self._pipe = child_pipe

1612

2127

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

1613

2128

if not self._pipe.recv():

1614

raise KeyError()

2129

raise KeyError(fpr)

1615

2130

1616

2131

def __getattribute__(self, name):

1617

2132

if name == '_pipe':

1621

2136

if data[0] == 'data':

1622

2137

return data[1]

1623

2138

if data[0] == 'function':

2139

1624

2140

def func(*args, **kwargs):

1625

2141

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

1626

2142

return self._pipe.recv()[1]

2143

1627

2144

return func

1628

2145

1629

2146

def __setattr__(self, name, value):

1641

2158

def handle(self):

1642

2159

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

1643

2160

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

1644

unicode(self.client_address))

2161

str(self.client_address))

1645

2162

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

1646

2163

self.server.child_pipe.fileno())

1647

2164

1648

session = (gnutls.connection

1649

.ClientSession(self.request,

1650

gnutls.connection

1651

.X509Credentials()))

1652

1653

# Note: gnutls.connection.X509Credentials is really a

1654

# generic GnuTLS certificate credentials object so long as

1655

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

1656

# here despite using OpenPGP certificates.

2165

session = gnutls.ClientSession(self.request)

1657

2166

1658

2167

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

1659

2168

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

1663

2172

priority = self.server.gnutls_priority

1664

2173

if priority is None:

1665

2174

priority = "NORMAL"

1666

(gnutls.library.functions

1667

.gnutls_priority_set_direct(session._c_object,

1668

priority, None))

2175

gnutls.priority_set_direct(session._c_object, priority,

2176

None)

1669

2177

1670

2178

# Start communication using the Mandos protocol

1671

2179

# Get protocol number

1673

2181

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

1674

2182

try:

1675

2183

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

1676

raise RuntimeError

2184

raise RuntimeError(line)

1677

2185

except (ValueError, IndexError, RuntimeError) as error:

1678

2186

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

1679

2187

return

1681

2189

# Start GnuTLS connection

1682

2190

try:

1683

2191

session.handshake()

1684

except gnutls.errors.GNUTLSError as error:

2192

except gnutls.Error as error:

1685

2193

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

1686

2194

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

1687

2195

# established. Just abandon the request.

1691

2199

approval_required = False

1692

2200

try:

1693

2201

try:

1694

fpr = self.fingerprint(self.peer_certificate

1695

(session))

1696

except (TypeError,

1697

gnutls.errors.GNUTLSError) as error:

2202

fpr = self.fingerprint(

2203

self.peer_certificate(session))

2204

except (TypeError, gnutls.Error) as error:

1698

2205

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

1699

2206

return

1700

2207

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

1713

2220

while True:

1714

2221

if not client.enabled:

1715

2222

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

1716

client.name)

2223

client.name)

1717

2224

if self.server.use_dbus:

1718

2225

# Emit D-Bus signal

1719

2226

client.Rejected("Disabled")

1728

2235

if self.server.use_dbus:

1729

2236

# Emit D-Bus signal

1730

2237

client.NeedApproval(

1731

client.approval_delay_milliseconds(),

1732

client.approved_by_default)

2238

client.approval_delay.total_seconds()

2239

* 1000, client.approved_by_default)

1733

2240

else:

1734

2241

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

1735

2242

client.name)

1741

2248

#wait until timeout or approved

1742

2249

time = datetime.datetime.now()

1743

2250

client.changedstate.acquire()

1744

client.changedstate.wait(

1745

float(timedelta_to_milliseconds(delay)

1746

/ 1000))

2251

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

1747

2252

client.changedstate.release()

1748

2253

time2 = datetime.datetime.now()

1749

2254

if (time2 - time) >= delay:

1760

2265

else:

1761

2266

delay -= time2 - time

1762

2267

1763

sent_size = 0

1764

while sent_size < len(client.secret):

1765

try:

1766

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

1767

except gnutls.errors.GNUTLSError as error:

1768

logger.warning("gnutls send failed",

1769

exc_info=error)

1770

return

1771

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

1772

sent, len(client.secret)

1773

- (sent_size + sent))

1774

sent_size += sent

2268

try:

2269

session.send(client.secret)

2270

except gnutls.Error as error:

2271

logger.warning("gnutls send failed",

2272

exc_info = error)

2273

return

1775

2274

1776

2275

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

1777

2276

# bump the timeout using extended_timeout

1785

2284

client.approvals_pending -= 1

1786

2285

try:

1787

2286

session.bye()

1788

except gnutls.errors.GNUTLSError as error:

2287

except gnutls.Error as error:

1789

2288

logger.warning("GnuTLS bye failed",

1790

2289

exc_info=error)

1791

2290

1793

2292

def peer_certificate(session):

1794

2293

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

1795

2294

# If not an OpenPGP certificate...

1796

if (gnutls.library.functions

1797

.gnutls_certificate_type_get(session._c_object)

1798

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1799

# ...do the normal thing

1800

return session.peer_certificate

2295

if (gnutls.certificate_type_get(session._c_object)

2296

!= gnutls.CRT_OPENPGP):

2297

# ...return invalid data

2298

return b""

1801

2299

list_size = ctypes.c_uint(1)

1802

cert_list = (gnutls.library.functions

1803

.gnutls_certificate_get_peers

2300

cert_list = (gnutls.certificate_get_peers

1804

2301

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

1805

2302

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

1806

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

1807

" certificate")

2303

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

1808

2304

if list_size.value == 0:

1809

2305

return None

1810

2306

cert = cert_list[0]

1814

2310

def fingerprint(openpgp):

1815

2311

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1816

2312

# 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))))

2313

datum = gnutls.datum_t(

2314

ctypes.cast(ctypes.c_char_p(openpgp),

2315

ctypes.POINTER(ctypes.c_ubyte)),

2316

ctypes.c_uint(len(openpgp)))

1822

2317

# New empty GnuTLS certificate

1823

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1824

(gnutls.library.functions

1825

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2318

crt = gnutls.openpgp_crt_t()

2319

gnutls.openpgp_crt_init(ctypes.byref(crt))

1826

2320

# 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))

2321

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

2322

gnutls.OPENPGP_FMT_RAW)

1831

2323

# Verify the self signature in the key

1832

2324

crtverify = ctypes.c_uint()

1833

(gnutls.library.functions

1834

.gnutls_openpgp_crt_verify_self(crt, 0,

1835

ctypes.byref(crtverify)))

2325

gnutls.openpgp_crt_verify_self(crt, 0,

2326

ctypes.byref(crtverify))

1836

2327

if crtverify.value != 0:

1837

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1838

raise (gnutls.errors.CertificateSecurityError

1839

("Verify failed"))

2328

gnutls.openpgp_crt_deinit(crt)

2329

raise gnutls.CertificateSecurityError("Verify failed")

1840

2330

# New buffer for the fingerprint

1841

2331

buf = ctypes.create_string_buffer(20)

1842

2332

buf_len = ctypes.c_size_t()

1843

2333

# 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)))

2334

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

2335

ctypes.byref(buf_len))

1847

2336

# Deinit the certificate

1848

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2337

gnutls.openpgp_crt_deinit(crt)

1849

2338

# Convert the buffer to a Python bytestring

1850

2339

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

1851

2340

# Convert the bytestring to hexadecimal notation

1855

2344

1856

2345

class MultiprocessingMixIn(object):

1857

2346

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

2347

1858

2348

def sub_process_main(self, request, address):

1859

2349

try:

1860

2350

self.finish_request(request, address)

1872

2362

1873

2363

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1874

2364

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

2365

1875

2366

def process_request(self, request, client_address):

1876

2367

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

1877

2368

1886

2377

1887

2378

def add_pipe(self, parent_pipe, proc):

1888

2379

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

1889

raise NotImplementedError

2380

raise NotImplementedError()

1890

2381

1891

2382

1892

2383

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1898

2389

interface: None or a network interface name (string)

1899

2390

use_ipv6: Boolean; to use IPv6 or not

1900

2391

"""

2392

1901

2393

def __init__(self, server_address, RequestHandlerClass,

1902

interface=None, use_ipv6=True):

2394

interface=None,

2395

use_ipv6=True,

2396

socketfd=None):

2397

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

2398

creating a new one with socket.socket().

2399

"""

1903

2400

self.interface = interface

1904

2401

if use_ipv6:

1905

2402

self.address_family = socket.AF_INET6

2403

if socketfd is not None:

2404

# Save the file descriptor

2405

self.socketfd = socketfd

2406

# Save the original socket.socket() function

2407

self.socket_socket = socket.socket

2408

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

2409

#

2410

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

2411

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

2412

# patching socket.socket.)

2413

#

2414

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

2415

@functools.wraps(socket.socket)

2416

def socket_wrapper(*args, **kwargs):

2417

# Restore original function so subsequent calls are

2418

# not affected.

2419

socket.socket = self.socket_socket

2420

del self.socket_socket

2421

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

2422

# saved file descriptor.

2423

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

2424

# Replace socket.socket() function with wrapper

2425

socket.socket = socket_wrapper

2426

# The socketserver.TCPServer.__init__ will call

2427

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

2428

# socket_wrapper(), if socketfd was set.

1906

2429

socketserver.TCPServer.__init__(self, server_address,

1907

2430

RequestHandlerClass)

2431

1908

2432

def server_bind(self):

1909

2433

"""This overrides the normal server_bind() function

1910

2434

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

1916

2440

self.interface)

1917

2441

else:

1918

2442

try:

1919

self.socket.setsockopt(socket.SOL_SOCKET,

1920

SO_BINDTODEVICE,

1921

str(self.interface

1922

+ '\0'))

2443

self.socket.setsockopt(

2444

socket.SOL_SOCKET, SO_BINDTODEVICE,

2445

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

1923

2446

except socket.error as error:

1924

2447

if error.errno == errno.EPERM:

1925

logger.error("No permission to"

1926

" bind to interface %s",

1927

self.interface)

2448

logger.error("No permission to bind to"

2449

" interface %s", self.interface)

1928

2450

elif error.errno == errno.ENOPROTOOPT:

1929

2451

logger.error("SO_BINDTODEVICE not available;"

1930

2452

" cannot bind to interface %s",

1931

2453

self.interface)

1932

2454

elif error.errno == errno.ENODEV:

1933

logger.error("Interface %s does not"

1934

" exist, cannot bind",

1935

self.interface)

2455

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

2456

" cannot bind", self.interface)

1936

2457

else:

1937

2458

raise

1938

2459

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

1941

2462

if self.address_family == socket.AF_INET6:

1942

2463

any_address = "::" # in6addr_any

1943

2464

else:

1944

any_address = socket.INADDR_ANY

2465

any_address = "0.0.0.0" # INADDR_ANY

1945

2466

self.server_address = (any_address,

1946

2467

self.server_address[1])

1947

2468

elif not self.server_address[1]:

1948

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

1949

0)

2469

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

1950

2470

# if self.interface:

1951

2471

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

1952

2472

# 0, # port

1964

2484

gnutls_priority GnuTLS priority string

1965

2485

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

1966

2486

1967

Assumes a gobject.MainLoop event loop.

2487

Assumes a GLib.MainLoop event loop.

1968

2488

"""

2489

1969

2490

def __init__(self, server_address, RequestHandlerClass,

1970

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

1971

gnutls_priority=None, use_dbus=True):

2491

interface=None,

2492

use_ipv6=True,

2493

clients=None,

2494

gnutls_priority=None,

2495

use_dbus=True,

2496

socketfd=None):

1972

2497

self.enabled = False

1973

2498

self.clients = clients

1974

2499

if self.clients is None:

1978

2503

IPv6_TCPServer.__init__(self, server_address,

1979

2504

RequestHandlerClass,

1980

2505

interface = interface,

1981

use_ipv6 = use_ipv6)

2506

use_ipv6 = use_ipv6,

2507

socketfd = socketfd)

2508

1982

2509

def server_activate(self):

1983

2510

if self.enabled:

1984

2511

return socketserver.TCPServer.server_activate(self)

1988

2515

1989

2516

def add_pipe(self, parent_pipe, proc):

1990

2517

# Call "handle_ipc" for both data and EOF events

1991

gobject.io_add_watch(parent_pipe.fileno(),

1992

gobject.IO_IN | gobject.IO_HUP,

1993

functools.partial(self.handle_ipc,

1994

parent_pipe =

1995

parent_pipe,

1996

proc = proc))

2518

GLib.io_add_watch(

2519

parent_pipe.fileno(),

2520

GLib.IO_IN | GLib.IO_HUP,

2521

functools.partial(self.handle_ipc,

2522

parent_pipe = parent_pipe,

2523

proc = proc))

1997

2524

1998

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

1999

proc = None, client_object=None):

2525

def handle_ipc(self, source, condition,

2526

parent_pipe=None,

2527

proc = None,

2528

client_object=None):

2000

2529

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

2001

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

2530

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

2002

2531

# Wait for other process to exit

2003

2532

proc.join()

2004

2533

return False

2011

2540

fpr = request[1]

2012

2541

address = request[2]

2013

2542

2014

for c in self.clients.itervalues():

2543

for c in self.clients.values():

2015

2544

if c.fingerprint == fpr:

2016

2545

client = c

2017

2546

break

2025

2554

parent_pipe.send(False)

2026

2555

return False

2027

2556

2028

gobject.io_add_watch(parent_pipe.fileno(),

2029

gobject.IO_IN | gobject.IO_HUP,

2030

functools.partial(self.handle_ipc,

2031

parent_pipe =

2032

parent_pipe,

2033

proc = proc,

2034

client_object =

2035

client))

2557

GLib.io_add_watch(

2558

parent_pipe.fileno(),

2559

GLib.IO_IN | GLib.IO_HUP,

2560

functools.partial(self.handle_ipc,

2561

parent_pipe = parent_pipe,

2562

proc = proc,

2563

client_object = client))

2036

2564

parent_pipe.send(True)

2037

2565

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

2038

2566

# same fileno

2044

2572

2045

2573

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

2046

2574

funcname)(*args,

2047

**kwargs)))

2575

**kwargs)))

2048

2576

2049

2577

if command == 'getattr':

2050

2578

attrname = request[1]

2051

if callable(client_object.__getattribute__(attrname)):

2052

parent_pipe.send(('function',))

2579

if isinstance(client_object.__getattribute__(attrname),

2580

collections.Callable):

2581

parent_pipe.send(('function', ))

2053

2582

else:

2054

parent_pipe.send(('data', client_object

2055

.__getattribute__(attrname)))

2583

parent_pipe.send((

2584

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

2056

2585

2057

2586

if command == 'setattr':

2058

2587

attrname = request[1]

2062

2591

return True

2063

2592

2064

2593

2594

def rfc3339_duration_to_delta(duration):

2595

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

2596

2597

>>> rfc3339_duration_to_delta("P7D")

2598

datetime.timedelta(7)

2599

>>> rfc3339_duration_to_delta("PT60S")

2600

datetime.timedelta(0, 60)

2601

>>> rfc3339_duration_to_delta("PT60M")

2602

datetime.timedelta(0, 3600)

2603

>>> rfc3339_duration_to_delta("PT24H")

2604

datetime.timedelta(1)

2605

>>> rfc3339_duration_to_delta("P1W")

2606

datetime.timedelta(7)

2607

>>> rfc3339_duration_to_delta("PT5M30S")

2608

datetime.timedelta(0, 330)

2609

>>> rfc3339_duration_to_delta("P1DT3M20S")

2610

datetime.timedelta(1, 200)

2611

"""

2612

2613

# Parsing an RFC 3339 duration with regular expressions is not

2614

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

2615

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

2616

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

2617

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

2618

# avoid excessive use of external libraries.

2619

2620

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

2621

Token = collections.namedtuple("Token", (

2622

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

2623

# a "group" containing digits

2624

"value", # datetime.timedelta or None

2625

"followers")) # Tokens valid after this token

2626

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

2627

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

2628

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

2629

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

2630

datetime.timedelta(seconds=1),

2631

frozenset((token_end, )))

2632

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

2633

datetime.timedelta(minutes=1),

2634

frozenset((token_second, token_end)))

2635

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

2636

datetime.timedelta(hours=1),

2637

frozenset((token_minute, token_end)))

2638

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

2639

None,

2640

frozenset((token_hour, token_minute,

2641

token_second)))

2642

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

2643

datetime.timedelta(days=1),

2644

frozenset((token_time, token_end)))

2645

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

2646

datetime.timedelta(weeks=4),

2647

frozenset((token_day, token_end)))

2648

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

2649

datetime.timedelta(weeks=52),

2650

frozenset((token_month, token_end)))

2651

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

2652

datetime.timedelta(weeks=1),

2653

frozenset((token_end, )))

2654

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

2655

frozenset((token_year, token_month,

2656

token_day, token_time,

2657

token_week)))

2658

# Define starting values

2659

value = datetime.timedelta() # Value so far

2660

found_token = None

2661

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

2662

s = duration # String left to parse

2663

# Loop until end token is found

2664

while found_token is not token_end:

2665

# Search for any currently valid tokens

2666

for token in followers:

2667

match = token.regexp.match(s)

2668

if match is not None:

2669

# Token found

2670

if token.value is not None:

2671

# Value found, parse digits

2672

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

2673

# Add to value so far

2674

value += factor * token.value

2675

# Strip token from string

2676

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

2677

# Go to found token

2678

found_token = token

2679

# Set valid next tokens

2680

followers = found_token.followers

2681

break

2682

else:

2683

# No currently valid tokens were found

2684

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

2685

.format(duration))

2686

# End token found

2687

return value

2688

2689

2065

2690

def string_to_delta(interval):

2066

2691

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

2067

2692

2078

2703

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

2079

2704

datetime.timedelta(0, 330)

2080

2705

"""

2706

2707

try:

2708

return rfc3339_duration_to_delta(interval)

2709

except ValueError:

2710

pass

2711

2081

2712

timevalue = datetime.timedelta(0)

2082

2713

for s in interval.split():

2083

2714

try:

2084

suffix = unicode(s[-1])

2715

suffix = s[-1]

2085

2716

value = int(s[:-1])

2086

2717

if suffix == "d":

2087

2718

delta = datetime.timedelta(value)

2094

2725

elif suffix == "w":

2095

2726

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

2096

2727

else:

2097

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

2098

.format(suffix))

2099

except (ValueError, IndexError) as e:

2728

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

2729

except IndexError as e:

2100

2730

raise ValueError(*(e.args))

2101

2731

timevalue += delta

2102

2732

return timevalue

2118

2748

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

2119

2749

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

2120

2750

raise OSError(errno.ENODEV,

2121

"{0} not a character device"

2751

"{} not a character device"

2122

2752

.format(os.devnull))

2123

2753

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

2124

2754

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

2134

2764

2135

2765

parser = argparse.ArgumentParser()

2136

2766

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

2137

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

2767

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

2138

2768

help="show version number and exit")

2139

2769

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

2140

2770

help="Bind to interface IF")

2146

2776

help="Run self-test")

2147

2777

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

2148

2778

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

2149

" to terminal")

2779

" to terminal", default=None)

2150

2780

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

2151

2781

help="Debug level for stdout output")

2152

2782

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

2159

2789

" files")

2160

2790

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

2161

2791

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

2162

" system bus interface")

2792

" system bus interface", default=None)

2163

2793

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

2164

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

2794

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

2795

default=None)

2165

2796

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

2166

2797

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

2167

" state")

2798

" state", default=None)

2799

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

2800

help="Specify a file descriptor to a network"

2801

" socket to use instead of creating one")

2168

2802

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

2169

2803

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

2804

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

2805

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

2806

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

2807

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

2808

default=None)

2170

2809

2171

2810

options = parser.parse_args()

2172

2811

2173

2812

if options.check:

2174

2813

import doctest

2175

doctest.testmod()

2176

sys.exit()

2814

fail_count, test_count = doctest.testmod()

2815

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

2177

2816

2178

2817

# Default values for config file for server-global settings

2179

2818

server_defaults = { "interface": "",

2181

2820

"port": "",

2182

2821

"debug": "False",

2183

2822

"priority":

2184

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

2823

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

2824

":+SIGN-DSA-SHA256",

2185

2825

"servicename": "Mandos",

2186

2826

"use_dbus": "True",

2187

2827

"use_ipv6": "True",

2188

2828

"debuglevel": "",

2189

2829

"restore": "True",

2190

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

2191

}

2830

"socket": "",

2831

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

2832

"foreground": "False",

2833

"zeroconf": "True",

2834

}

2192

2835

2193

2836

# Parse config file for server-global settings

2194

2837

server_config = configparser.SafeConfigParser(server_defaults)

2195

2838

del server_defaults

2196

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

2197

"mandos.conf"))

2839

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

2198

2840

# Convert the SafeConfigParser object to a dict

2199

2841

server_settings = server_config.defaults()

2200

2842

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

2201

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

2843

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

2202

2844

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

2203

2845

option)

2204

2846

if server_settings["port"]:

2205

2847

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

2206

2848

"port")

2849

if server_settings["socket"]:

2850

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

2851

"socket")

2852

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

2853

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

2854

# happen with a supplied network socket.

2855

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

2856

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

2857

["socket"])

2207

2858

del server_config

2208

2859

2209

2860

# Override the settings from the config file with command line

2210

2861

# options, if set.

2211

2862

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

2212

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

2213

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

2214

"statedir"):

2863

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

2864

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

2865

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

2215

2866

value = getattr(options, option)

2216

2867

if value is not None:

2217

2868

server_settings[option] = value

2218

2869

del options

2219

2870

# Force all strings to be unicode

2220

2871

for option in server_settings.keys():

2221

if type(server_settings[option]) is str:

2222

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

2872

if isinstance(server_settings[option], bytes):

2873

server_settings[option] = (server_settings[option]

2874

.decode("utf-8"))

2875

# Force all boolean options to be boolean

2876

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

2877

"foreground", "zeroconf"):

2878

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

2879

# Debug implies foreground

2880

if server_settings["debug"]:

2881

server_settings["foreground"] = True

2223

2882

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

2224

2883

2225

2884

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

2226

2885

2886

if (not server_settings["zeroconf"]

2887

and not (server_settings["port"]

2888

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

2889

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

2890

2227

2891

# For convenience

2228

2892

debug = server_settings["debug"]

2229

2893

debuglevel = server_settings["debuglevel"]

2231

2895

use_ipv6 = server_settings["use_ipv6"]

2232

2896

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

2233

2897

stored_state_file)

2898

foreground = server_settings["foreground"]

2899

zeroconf = server_settings["zeroconf"]

2234

2900

2235

2901

if debug:

2236

2902

initlogger(debug, logging.DEBUG)

2242

2908

initlogger(debug, level)

2243

2909

2244

2910

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

2245

syslogger.setFormatter(logging.Formatter

2246

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

2247

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

2248

.format(server_settings

2249

["servicename"])))

2911

syslogger.setFormatter(

2912

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

2913

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

2914

server_settings["servicename"])))

2250

2915

2251

2916

# Parse config file with clients

2252

2917

client_config = configparser.SafeConfigParser(Client

2257

2922

global mandos_dbus_service

2258

2923

mandos_dbus_service = None

2259

2924

2260

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

2261

server_settings["port"]),

2262

ClientHandler,

2263

interface=(server_settings["interface"]

2264

or None),

2265

use_ipv6=use_ipv6,

2266

gnutls_priority=

2267

server_settings["priority"],

2268

use_dbus=use_dbus)

2269

if not debug:

2270

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

2925

socketfd = None

2926

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

2927

socketfd = server_settings["socket"]

2928

tcp_server = MandosServer(

2929

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

2930

ClientHandler,

2931

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

2932

use_ipv6=use_ipv6,

2933

gnutls_priority=server_settings["priority"],

2934

use_dbus=use_dbus,

2935

socketfd=socketfd)

2936

if not foreground:

2937

pidfilename = "/run/mandos.pid"

2938

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

2939

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

2940

pidfile = None

2271

2941

try:

2272

pidfile = open(pidfilename, "w")

2942

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

2273

2943

except IOError as e:

2274

2944

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

2275

2945

exc_info=e)

2276

2946

2277

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

2947

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

2948

("mandos", "mandos"),

2949

("nobody", "nogroup")):

2278

2950

try:

2279

2951

uid = pwd.getpwnam(name).pw_uid

2280

gid = pwd.getpwnam(name).pw_gid

2952

gid = pwd.getpwnam(group).pw_gid

2281

2953

break

2282

2954

except KeyError:

2283

2955

continue

2287

2959

try:

2288

2960

os.setgid(gid)

2289

2961

os.setuid(uid)

2962

if debug:

2963

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

2964

gid))

2290

2965

except OSError as error:

2966

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

2967

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

2291

2968

if error.errno != errno.EPERM:

2292

raise error

2969

raise

2293

2970

2294

2971

if debug:

2295

2972

# Enable all possible GnuTLS debugging

2296

2973

2297

2974

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

2298

2975

# - GnuTLS manual

2299

gnutls.library.functions.gnutls_global_set_log_level(11)

2976

gnutls.global_set_log_level(11)

2300

2977

2301

@gnutls.library.types.gnutls_log_func

2978

@gnutls.log_func

2302

2979

def debug_gnutls(level, string):

2303

2980

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

2304

2981

2305

(gnutls.library.functions

2306

.gnutls_global_set_log_function(debug_gnutls))

2982

gnutls.global_set_log_function(debug_gnutls)

2307

2983

2308

2984

# Redirect stdin so all checkers get /dev/null

2309

2985

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

2312

2988

os.close(null)

2313

2989

2314

2990

# Need to fork before connecting to D-Bus

2315

if not debug:

2991

if not foreground:

2316

2992

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

2317

2993

daemon()

2318

2994

2319

gobject.threads_init()

2995

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

2996

# to inform GLib that threads will be used.

2997

GLib.threads_init()

2320

2998

2321

2999

global main_loop

2322

3000

# From the Avahi example code

2323

3001

DBusGMainLoop(set_as_default=True)

2324

main_loop = gobject.MainLoop()

3002

main_loop = GLib.MainLoop()

2325

3003

bus = dbus.SystemBus()

2326

3004

# End of Avahi example code

2327

3005

if use_dbus:

2328

3006

try:

2329

3007

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

2330

bus, do_not_queue=True)

2331

old_bus_name = (dbus.service.BusName

2332

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

2333

do_not_queue=True))

2334

except dbus.exceptions.NameExistsException as e:

3008

bus,

3009

do_not_queue=True)

3010

old_bus_name = dbus.service.BusName(

3011

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

3012

do_not_queue=True)

3013

except dbus.exceptions.DBusException as e:

2335

3014

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

2336

3015

use_dbus = False

2337

3016

server_settings["use_dbus"] = False

2338

3017

tcp_server.use_dbus = False

2339

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2340

service = AvahiServiceToSyslog(name =

2341

server_settings["servicename"],

2342

servicetype = "_mandos._tcp",

2343

protocol = protocol, bus = bus)

2344

if server_settings["interface"]:

2345

service.interface = (if_nametoindex

2346

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

3018

if zeroconf:

3019

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

3020

service = AvahiServiceToSyslog(

3021

name = server_settings["servicename"],

3022

servicetype = "_mandos._tcp",

3023

protocol = protocol,

3024

bus = bus)

3025

if server_settings["interface"]:

3026

service.interface = if_nametoindex(

3027

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

2347

3028

2348

3029

global multiprocessing_manager

2349

3030

multiprocessing_manager = multiprocessing.Manager()

2356

3037

old_client_settings = {}

2357

3038

clients_data = {}

2358

3039

3040

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

3041

global wnull

3042

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

3043

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

3044

# mode

3045

if debug or not foreground:

3046

wnull.close()

3047

2359

3048

# Get client data and settings from last running state.

2360

3049

if server_settings["restore"]:

2361

3050

try:

2362

3051

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

2363

clients_data, old_client_settings = (pickle.load

2364

(stored_state))

3052

if sys.version_info.major == 2:

3053

clients_data, old_client_settings = pickle.load(

3054

stored_state)

3055

else:

3056

bytes_clients_data, bytes_old_client_settings = (

3057

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

3058

### Fix bytes to strings

3059

## clients_data

3060

# .keys()

3061

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

3062

if isinstance(key, bytes)

3063

else key): value

3064

for key, value in

3065

bytes_clients_data.items() }

3066

del bytes_clients_data

3067

for key in clients_data:

3068

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

3069

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

3070

for k, v in

3071

clients_data[key].items() }

3072

clients_data[key] = value

3073

# .client_structure

3074

value["client_structure"] = [

3075

(s.decode("utf-8")

3076

if isinstance(s, bytes)

3077

else s) for s in

3078

value["client_structure"] ]

3079

# .name & .host

3080

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

3081

if isinstance(value[k], bytes):

3082

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

3083

## old_client_settings

3084

# .keys()

3085

old_client_settings = {

3086

(key.decode("utf-8")

3087

if isinstance(key, bytes)

3088

else key): value

3089

for key, value in

3090

bytes_old_client_settings.items() }

3091

del bytes_old_client_settings

3092

# .host

3093

for value in old_client_settings.values():

3094

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

3095

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

3096

.decode("utf-8"))

2365

3097

os.remove(stored_state_path)

2366

3098

except IOError as e:

2367

3099

if e.errno == errno.ENOENT:

2368

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

2369

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

3100

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

3101

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

2370

3102

else:

2371

3103

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

2372

3104

exc_info=e)

2373

3105

raise

2374

3106

except EOFError as e:

2375

3107

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

2376

"EOFError:", exc_info=e)

3108

"EOFError:",

3109

exc_info=e)

2377

3110

2378

3111

with PGPEngine() as pgp:

2379

for client_name, client in clients_data.iteritems():

3112

for client_name, client in clients_data.items():

3113

# Skip removed clients

3114

if client_name not in client_settings:

3115

continue

3116

2380

3117

# Decide which value to use after restoring saved state.

2381

3118

# We have three different values: Old config file,

2382

3119

# new config file, and saved state.

2387

3124

# For each value in new config, check if it

2388

3125

# differs from the old config value (Except for

2389

3126

# the "secret" attribute)

2390

if (name != "secret" and

2391

value != old_client_settings[client_name]

2392

[name]):

3127

if (name != "secret"

3128

and (value !=

3129

old_client_settings[client_name][name])):

2393

3130

client[name] = value

2394

3131

except KeyError:

2395

3132

pass

2396

3133

2397

3134

# Clients who has passed its expire date can still be

2398

# enabled if its last checker was successful. Clients

3135

# enabled if its last checker was successful. A Client

2399

3136

# whose checker succeeded before we stored its state is

2400

3137

# assumed to have successfully run all checkers during

2401

3138

# downtime.

2403

3140

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

2404

3141

if not client["last_checked_ok"]:

2405

3142

logger.warning(

2406

"disabling client {0} - Client never "

2407

"performed a successful checker"

2408

.format(client_name))

3143

"disabling client {} - Client never "

3144

"performed a successful checker".format(

3145

client_name))

2409

3146

client["enabled"] = False

2410

3147

elif client["last_checker_status"] != 0:

2411

3148

logger.warning(

2412

"disabling client {0} - Client "

2413

"last checker failed with error code {1}"

2414

.format(client_name,

2415

client["last_checker_status"]))

3149

"disabling client {} - Client last"

3150

" checker failed with error code"

3151

" {}".format(

3152

client_name,

3153

client["last_checker_status"]))

2416

3154

client["enabled"] = False

2417

3155

else:

2418

client["expires"] = (datetime.datetime

2419

.utcnow()

2420

+ client["timeout"])

3156

client["expires"] = (

3157

datetime.datetime.utcnow()

3158

+ client["timeout"])

2421

3159

logger.debug("Last checker succeeded,"

2422

" keeping {0} enabled"

2423

.format(client_name))

3160

" keeping {} enabled".format(

3161

client_name))

2424

3162

try:

2425

client["secret"] = (

2426

pgp.decrypt(client["encrypted_secret"],

2427

client_settings[client_name]

2428

["secret"]))

3163

client["secret"] = pgp.decrypt(

3164

client["encrypted_secret"],

3165

client_settings[client_name]["secret"])

2429

3166

except PGPError:

2430

3167

# If decryption fails, we use secret from new settings

2431

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

2432

.format(client_name))

2433

client["secret"] = (

2434

client_settings[client_name]["secret"])

3168

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

3169

client_name))

3170

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

3171

["secret"])

2435

3172

2436

3173

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

2437

3174

for client_name in (set(old_client_settings)

2442

3179

clients_data[client_name] = client_settings[client_name]

2443

3180

2444

3181

# Create all client objects

2445

for client_name, client in clients_data.iteritems():

3182

for client_name, client in clients_data.items():

2446

3183

tcp_server.clients[client_name] = client_class(

2447

name = client_name, settings = client)

3184

name = client_name,

3185

settings = client,

3186

server_settings = server_settings)

2448

3187

2449

3188

if not tcp_server.clients:

2450

3189

logger.warning("No clients defined")

2451

3190

2452

if not debug:

2453

try:

2454

with pidfile:

2455

pid = os.getpid()

2456

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

2457

del pidfile

2458

except IOError:

2459

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

2460

pidfilename, pid)

2461

except NameError:

2462

# "pidfile" was never created

2463

pass

3191

if not foreground:

3192

if pidfile is not None:

3193

pid = os.getpid()

3194

try:

3195

with pidfile:

3196

print(pid, file=pidfile)

3197

except IOError:

3198

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

3199

pidfilename, pid)

3200

del pidfile

2464

3201

del pidfilename

2465

3202

2466

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

2467

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

3203

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

3204

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3205

lambda: main_loop.quit() and False)

2468

3206

2469

3207

if use_dbus:

2470

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

2471

"se.bsnet.fukt.Mandos"})

2472

class MandosDBusService(DBusObjectWithProperties):

3208

3209

@alternate_dbus_interfaces(

3210

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

3211

class MandosDBusService(DBusObjectWithObjectManager):

2473

3212

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

3213

2474

3214

def __init__(self):

2475

3215

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

3216

2476

3217

_interface = "se.recompile.Mandos"

2477

3218

2478

@dbus_interface_annotations(_interface)

2479

def _foo(self):

2480

return { "org.freedesktop.DBus.Property"

2481

".EmitsChangedSignal":

2482

"false"}

2483

2484

3219

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

2485

3220

def ClientAdded(self, objpath):

2486

3221

"D-Bus signal"

2491

3226

"D-Bus signal"

2492

3227

pass

2493

3228

3229

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

3230

"true"})

2494

3231

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

2495

3232

def ClientRemoved(self, objpath, name):

2496

3233

"D-Bus signal"

2497

3234

pass

2498

3235

3236

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

3237

"true"})

2499

3238

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

2500

3239

def GetAllClients(self):

2501

3240

"D-Bus method"

2502

return dbus.Array(c.dbus_object_path

2503

for c in

2504

tcp_server.clients.itervalues())

3241

return dbus.Array(c.dbus_object_path for c in

3242

tcp_server.clients.values())

2505

3243

3244

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

3245

"true"})

2506

3246

@dbus.service.method(_interface,

2507

3247

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

2508

3248

def GetAllClientsWithProperties(self):

2509

3249

"D-Bus method"

2510

3250

return dbus.Dictionary(

2511

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

2512

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

3251

{ c.dbus_object_path: c.GetAll(

3252

"se.recompile.Mandos.Client")

3253

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

2513

3254

signature="oa{sv}")

2514

3255

2515

3256

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

2516

3257

def RemoveClient(self, object_path):

2517

3258

"D-Bus method"

2518

for c in tcp_server.clients.itervalues():

3259

for c in tcp_server.clients.values():

2519

3260

if c.dbus_object_path == object_path:

2520

3261

del tcp_server.clients[c.name]

2521

3262

c.remove_from_connection()

2522

# Don't signal anything except ClientRemoved

3263

# Don't signal the disabling

2523

3264

c.disable(quiet=True)

2524

# Emit D-Bus signal

2525

self.ClientRemoved(object_path, c.name)

3265

# Emit D-Bus signal for removal

3266

self.client_removed_signal(c)

2526

3267

return

2527

3268

raise KeyError(object_path)

2528

3269

2529

3270

del _interface

3271

3272

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3273

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

3274

def GetManagedObjects(self):

3275

"""D-Bus method"""

3276

return dbus.Dictionary(

3277

{ client.dbus_object_path:

3278

dbus.Dictionary(

3279

{ interface: client.GetAll(interface)

3280

for interface in

3281

client._get_all_interface_names()})

3282

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

3283

3284

def client_added_signal(self, client):

3285

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

3286

if use_dbus:

3287

# New standard signal

3288

self.InterfacesAdded(

3289

client.dbus_object_path,

3290

dbus.Dictionary(

3291

{ interface: client.GetAll(interface)

3292

for interface in

3293

client._get_all_interface_names()}))

3294

# Old signal

3295

self.ClientAdded(client.dbus_object_path)

3296

3297

def client_removed_signal(self, client):

3298

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

3299

if use_dbus:

3300

# New standard signal

3301

self.InterfacesRemoved(

3302

client.dbus_object_path,

3303

client._get_all_interface_names())

3304

# Old signal

3305

self.ClientRemoved(client.dbus_object_path,

3306

client.name)

2530

3307

2531

3308

mandos_dbus_service = MandosDBusService()

2532

3309

2533

3310

def cleanup():

2534

3311

"Cleanup function; run on exit"

2535

service.cleanup()

3312

if zeroconf:

3313

service.cleanup()

2536

3314

2537

3315

multiprocessing.active_children()

3316

wnull.close()

2538

3317

if not (tcp_server.clients or client_settings):

2539

3318

return

2540

3319

2543

3322

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

2544

3323

clients = {}

2545

3324

with PGPEngine() as pgp:

2546

for client in tcp_server.clients.itervalues():

3325

for client in tcp_server.clients.values():

2547

3326

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

2548

3327

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

2549

3328

key)

2551

3330

2552

3331

# A list of attributes that can not be pickled

2553

3332

# + secret.

2554

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

2555

"checker"))

2556

for name, typ in (inspect.getmembers

2557

(dbus.service.Object)):

3333

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

3334

"checker", "server_settings" }

3335

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

3336

.Object):

2558

3337

exclude.add(name)

2559

3338

2560

3339

client_dict["encrypted_secret"] = (client

2567

3346

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

2568

3347

2569

3348

try:

2570

with (tempfile.NamedTemporaryFile

2571

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

2572

dir=os.path.dirname(stored_state_path),

2573

delete=False)) as stored_state:

2574

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

2575

tempname=stored_state.name

3349

with tempfile.NamedTemporaryFile(

3350

mode='wb',

3351

suffix=".pickle",

3352

prefix='clients-',

3353

dir=os.path.dirname(stored_state_path),

3354

delete=False) as stored_state:

3355

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

3356

protocol = 2)

3357

tempname = stored_state.name

2576

3358

os.rename(tempname, stored_state_path)

2577

3359

except (IOError, OSError) as e:

2578

3360

if not debug:

2581

3363

except NameError:

2582

3364

pass

2583

3365

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

2584

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

3366

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

2585

3367

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

2586

3368

else:

2587

3369

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

2588

3370

exc_info=e)

2589

raise e

3371

raise

2590

3372

2591

3373

# Delete all clients, and settings from config

2592

3374

while tcp_server.clients:

2593

3375

name, client = tcp_server.clients.popitem()

2594

3376

if use_dbus:

2595

3377

client.remove_from_connection()

2596

# Don't signal anything except ClientRemoved

3378

# Don't signal the disabling

2597

3379

client.disable(quiet=True)

3380

# Emit D-Bus signal for removal

2598

3381

if use_dbus:

2599

# Emit D-Bus signal

2600

mandos_dbus_service.ClientRemoved(client

2601

.dbus_object_path,

2602

client.name)

3382

mandos_dbus_service.client_removed_signal(client)

2603

3383

client_settings.clear()

2604

3384

2605

3385

atexit.register(cleanup)

2606

3386

2607

for client in tcp_server.clients.itervalues():

3387

for client in tcp_server.clients.values():

2608

3388

if use_dbus:

2609

# Emit D-Bus signal

2610

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3389

# Emit D-Bus signal for adding

3390

mandos_dbus_service.client_added_signal(client)

2611

3391

# Need to initiate checking of clients

2612

3392

if client.enabled:

2613

3393

client.init_checker()

2616

3396

tcp_server.server_activate()

2617

3397

2618

3398

# Find out what port we got

2619

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

3399

if zeroconf:

3400

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

2620

3401

if use_ipv6:

2621

3402

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

2622

3403

" flowinfo %d, scope_id %d",

2628

3409

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

2629

3410

2630

3411

try:

2631

# From the Avahi example code

2632

try:

2633

service.activate()

2634

except dbus.exceptions.DBusException as error:

2635

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

2636

cleanup()

2637

sys.exit(1)

2638

# End of Avahi example code

3412

if zeroconf:

3413

# From the Avahi example code

3414

try:

3415

service.activate()

3416

except dbus.exceptions.DBusException as error:

3417

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

3418

cleanup()

3419

sys.exit(1)

3420

# End of Avahi example code

2639

3421

2640

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

2641

lambda *args, **kwargs:

2642

(tcp_server.handle_request

2643

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

3422

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

3423

lambda *args, **kwargs:

3424

(tcp_server.handle_request

3425

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

2644

3426

2645

3427

logger.debug("Starting main loop")

2646

3428

main_loop.run()

2656

3438

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

2657

3439

cleanup()

2658

3440

3441

2659

3442

if __name__ == '__main__':

2660

3443

main()