/mandos/trunk : revision 1136

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#!/usr/bin/python3 -bI

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# -*- coding: utf-8; lexical-binding: t -*-

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#!/usr/bin/python

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

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#

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

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#

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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 file is part of Mandos.

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#

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#

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# Contact the authors at <mandos@recompile.se>.

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#

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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except ImportError:

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pass

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import sys

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import unittest

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import argparse

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import logging

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import os

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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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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 signal

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import subprocess

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import atexit

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import stat

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import logging

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import logging.handlers

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import pwd

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import contextlib

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import itertools

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import collections

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import codecs

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import random

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import shlex

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import dbus

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import dbus.service

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import gi

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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 xml.dom.minidom

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import inspect

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if sys.version_info.major == 2:

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__metaclass__ = type

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str = unicode

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input = raw_input

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# Add collections.abc.Callable if it does not exist

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try:

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collections.abc.Callable

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except AttributeError:

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class abc:

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Callable = collections.Callable

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collections.abc = abc

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del abc

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# Add shlex.quote if it does not exist

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try:

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shlex.quote

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except AttributeError:

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shlex.quote = re.escape

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# Show warnings by default

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if not sys.warnoptions:

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import warnings

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warnings.simplefilter("default")

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# Try to find the value of SO_BINDTODEVICE:

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try:

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# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and

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# No value found

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SO_BINDTODEVICE = None

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if sys.version_info < (3, 2):

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configparser.Configparser = configparser.SafeConfigParser

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if sys.version_info.major == 2:

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str = unicode

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version = "1.8.16"

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version = "1.8.5"

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stored_state_file = "clients.pickle"

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log = logging.getLogger(os.path.basename(sys.argv[0]))

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logging.captureWarnings(True) # Show warnings via the logging system

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logger = logging.getLogger()

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syslogger = None

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try:

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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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log.addHandler(syslogger)

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

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' %(message)s'))

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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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console.setFormatter(logging.Formatter("%(asctime)s %(name)s"

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" [%(process)d]:"

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" %(levelname)s:"

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" %(message)s"))

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log.addHandler(console)

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log.setLevel(level)

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console.setFormatter(logging.Formatter('%(asctime)s %(name)s'

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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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logger.setLevel(level)

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class PGPError(Exception):

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pass

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class PGPEngine:

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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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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 == b"gpg":

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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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self.gnupgargs = ['--batch',

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'--homedir', self.tempdir,

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'--force-mdc',

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'--quiet']

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

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

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

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

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def __enter__(self):

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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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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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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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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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# Pretend that we have an Avahi module

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class avahi:

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

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

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pass

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class AvahiService:

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class AvahiService(object):

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"""An Avahi (Zeroconf) service.

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Attributes:

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interface: integer; avahi.IF_UNSPEC or an interface index.

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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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name: string; Example: 'Mandos'

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

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

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port: integer; what port to announce

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TXT: list of strings; TXT record for the service

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def rename(self, remove=True):

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

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if self.rename_count >= self.max_renames:

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

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" after %i retries, exiting.",

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self.rename_count)

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

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" after %i retries, exiting.",

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self.rename_count)

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raise AvahiServiceError("Too many renames")

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self.name = str(

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self.server.GetAlternativeServiceName(self.name))

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self.rename_count += 1

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

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self.name)

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

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self.name)

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if remove:

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self.remove()

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try:

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except dbus.exceptions.DBusException as error:

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if (error.get_dbus_name()

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

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

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

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return self.rename(remove=False)

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else:

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

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

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self.cleanup()

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os._exit(1)

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avahi.DBUS_INTERFACE_ENTRY_GROUP)

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self.entry_group_state_changed_match = (

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self.group.connect_to_signal(

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"StateChanged", self.entry_group_state_changed))

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log.debug("Adding Zeroconf service '%s' of type '%s' ...",

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self.name, self.type)

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'StateChanged', self.entry_group_state_changed))

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logger.debug("Adding Zeroconf service '%s' of type '%s' ...",

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self.name, self.type)

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self.group.AddService(

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self.interface,

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self.protocol,

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def entry_group_state_changed(self, state, error):

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

453

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

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

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if state == avahi.ENTRY_GROUP_ESTABLISHED:

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log.debug("Zeroconf service established.")

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logger.debug("Zeroconf service established.")

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elif state == avahi.ENTRY_GROUP_COLLISION:

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log.info("Zeroconf service name collision.")

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

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self.rename()

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elif state == avahi.ENTRY_GROUP_FAILURE:

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

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str(error))

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

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str(error))

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

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def cleanup(self):

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

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

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

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

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bad_states = {

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avahi.SERVER_INVALID: "Zeroconf server invalid",

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avahi.SERVER_REGISTERING: None,

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if state in bad_states:

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if bad_states[state] is not None:

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if error is None:

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log.error(bad_states[state])

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logger.error(bad_states[state])

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else:

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

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

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self.cleanup()

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elif state == avahi.SERVER_RUNNING:

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try:

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except dbus.exceptions.DBusException as error:

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if (error.get_dbus_name()

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

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

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logger.info("Local Zeroconf service name"

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" collision.")

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return self.rename(remove=False)

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else:

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

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

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self.cleanup()

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os._exit(1)

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else:

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if error is None:

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

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

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else:

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

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

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def activate(self):

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

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class AvahiServiceToSyslog(AvahiService):

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

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

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ret = super(AvahiServiceToSyslog, self).rename(*args,

527

**kwargs)

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ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)

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syslogger.setFormatter(logging.Formatter(

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

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

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.format(self.name)))

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return ret

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# Pretend that we have a GnuTLS module

535

class gnutls:

506

class gnutls(object):

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

537

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library = ctypes.util.find_library("gnutls")

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OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

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534

564

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# Types

565

class _session_int(ctypes.Structure):

536

class session_int(ctypes.Structure):

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_fields_ = []

567

session_t = ctypes.POINTER(_session_int)

538

session_t = ctypes.POINTER(session_int)

568

539

569

540

class certificate_credentials_st(ctypes.Structure):

570

541

_fields_ = []

573

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certificate_type_t = ctypes.c_int

574

545

575

546

class datum_t(ctypes.Structure):

576

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

577

("size", ctypes.c_uint)]

547

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

548

('size', ctypes.c_uint)]

578

549

579

class _openpgp_crt_int(ctypes.Structure):

550

class openpgp_crt_int(ctypes.Structure):

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551

_fields_ = []

581

openpgp_crt_t = ctypes.POINTER(_openpgp_crt_int)

552

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

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553

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

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554

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

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credentials_type_t = ctypes.c_int

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# gnutls.strerror()

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self.code = code

595

566

if message is None and code is not None:

596

message = gnutls.strerror(code).decode(

597

"utf-8", errors="replace")

567

message = gnutls.strerror(code)

598

568

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

599

569

message, *args)

600

570

601

571

class CertificateSecurityError(Error):

602

572

pass

603

573

604

class PointerTo:

605

def __init__(self, cls):

606

self.cls = cls

607

608

def from_param(self, obj):

609

if not isinstance(obj, self.cls):

610

raise TypeError("Not of type {}: {!r}"

611

.format(self.cls.__name__, obj))

612

return ctypes.byref(obj.from_param(obj))

613

614

class CastToVoidPointer:

615

def __init__(self, cls):

616

self.cls = cls

617

618

def from_param(self, obj):

619

if not isinstance(obj, self.cls):

620

raise TypeError("Not of type {}: {!r}"

621

.format(self.cls.__name__, obj))

622

return ctypes.cast(obj.from_param(obj), ctypes.c_void_p)

623

624

class With_from_param:

625

@classmethod

626

def from_param(cls, obj):

627

return obj._as_parameter_

628

629

574

# Classes

630

class Credentials(With_from_param):

575

class Credentials(object):

631

576

def __init__(self):

632

self._as_parameter_ = gnutls.certificate_credentials_t()

633

gnutls.certificate_allocate_credentials(self)

577

self._c_object = gnutls.certificate_credentials_t()

578

gnutls.certificate_allocate_credentials(

579

ctypes.byref(self._c_object))

634

580

self.type = gnutls.CRD_CERTIFICATE

635

581

636

582

def __del__(self):

637

gnutls.certificate_free_credentials(self)

583

gnutls.certificate_free_credentials(self._c_object)

638

584

639

class ClientSession(With_from_param):

585

class ClientSession(object):

640

586

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

641

self._as_parameter_ = gnutls.session_t()

587

self._c_object = gnutls.session_t()

642

588

gnutls_flags = gnutls.CLIENT

643

589

if gnutls.check_version(b"3.5.6"):

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590

gnutls_flags |= gnutls.NO_TICKETS

645

591

if gnutls.has_rawpk:

646

592

gnutls_flags |= gnutls.ENABLE_RAWPK

647

gnutls.init(self, gnutls_flags)

593

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

648

594

del gnutls_flags

649

gnutls.set_default_priority(self)

650

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

651

gnutls.handshake_set_private_extensions(self, True)

595

gnutls.set_default_priority(self._c_object)

596

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

597

gnutls.handshake_set_private_extensions(self._c_object,

598

True)

652

599

self.socket = socket

653

600

if credentials is None:

654

601

credentials = gnutls.Credentials()

655

gnutls.credentials_set(self, credentials.type,

656

credentials)

602

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

603

ctypes.cast(credentials._c_object,

604

ctypes.c_void_p))

657

605

self.credentials = credentials

658

606

659

607

def __del__(self):

660

gnutls.deinit(self)

608

gnutls.deinit(self._c_object)

661

609

662

610

def handshake(self):

663

return gnutls.handshake(self)

611

return gnutls.handshake(self._c_object)

664

612

665

613

def send(self, data):

666

614

data = bytes(data)

667

615

data_len = len(data)

668

616

while data_len > 0:

669

data_len -= gnutls.record_send(self, data[-data_len:],

617

data_len -= gnutls.record_send(self._c_object,

618

data[-data_len:],

670

619

data_len)

671

620

672

621

def bye(self):

673

return gnutls.bye(self, gnutls.SHUT_RDWR)

622

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

674

623

675

624

# Error handling functions

676

625

def _error_code(result):

677

626

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

678

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

679

if result >= gnutls.E_SUCCESS:

627

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

628

if result >= 0:

680

629

return result

681

630

if result == gnutls.E_NO_CERTIFICATE_FOUND:

682

631

raise gnutls.CertificateSecurityError(code=result)

683

632

raise gnutls.Error(code=result)

684

633

685

def _retry_on_error(result, func, arguments,

686

_error_code=_error_code):

634

def _retry_on_error(result, func, arguments):

687

635

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

688

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

689

while result < gnutls.E_SUCCESS:

636

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

637

while result < 0:

690

638

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

691

639

return _error_code(result)

692

640

result = func(*arguments)

697

645

698

646

# Functions

699

647

priority_set_direct = _library.gnutls_priority_set_direct

700

priority_set_direct.argtypes = [ClientSession, ctypes.c_char_p,

648

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

701

649

ctypes.POINTER(ctypes.c_char_p)]

702

650

priority_set_direct.restype = _error_code

703

651

704

652

init = _library.gnutls_init

705

init.argtypes = [PointerTo(ClientSession), ctypes.c_int]

653

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

706

654

init.restype = _error_code

707

655

708

656

set_default_priority = _library.gnutls_set_default_priority

709

set_default_priority.argtypes = [ClientSession]

657

set_default_priority.argtypes = [session_t]

710

658

set_default_priority.restype = _error_code

711

659

712

660

record_send = _library.gnutls_record_send

713

record_send.argtypes = [ClientSession, ctypes.c_void_p,

661

record_send.argtypes = [session_t, ctypes.c_void_p,

714

662

ctypes.c_size_t]

715

663

record_send.restype = ctypes.c_ssize_t

716

664

record_send.errcheck = _retry_on_error

718

666

certificate_allocate_credentials = (

719

667

_library.gnutls_certificate_allocate_credentials)

720

668

certificate_allocate_credentials.argtypes = [

721

PointerTo(Credentials)]

669

ctypes.POINTER(certificate_credentials_t)]

722

670

certificate_allocate_credentials.restype = _error_code

723

671

724

672

certificate_free_credentials = (

725

673

_library.gnutls_certificate_free_credentials)

726

certificate_free_credentials.argtypes = [Credentials]

674

certificate_free_credentials.argtypes = [

675

certificate_credentials_t]

727

676

certificate_free_credentials.restype = None

728

677

729

678

handshake_set_private_extensions = (

730

679

_library.gnutls_handshake_set_private_extensions)

731

handshake_set_private_extensions.argtypes = [ClientSession,

680

handshake_set_private_extensions.argtypes = [session_t,

732

681

ctypes.c_int]

733

682

handshake_set_private_extensions.restype = None

734

683

735

684

credentials_set = _library.gnutls_credentials_set

736

credentials_set.argtypes = [ClientSession, credentials_type_t,

737

CastToVoidPointer(Credentials)]

685

credentials_set.argtypes = [session_t, credentials_type_t,

686

ctypes.c_void_p]

738

687

credentials_set.restype = _error_code

739

688

740

689

strerror = _library.gnutls_strerror

742

691

strerror.restype = ctypes.c_char_p

743

692

744

693

certificate_type_get = _library.gnutls_certificate_type_get

745

certificate_type_get.argtypes = [ClientSession]

694

certificate_type_get.argtypes = [session_t]

746

695

certificate_type_get.restype = _error_code

747

696

748

697

certificate_get_peers = _library.gnutls_certificate_get_peers

749

certificate_get_peers.argtypes = [ClientSession,

698

certificate_get_peers.argtypes = [session_t,

750

699

ctypes.POINTER(ctypes.c_uint)]

751

700

certificate_get_peers.restype = ctypes.POINTER(datum_t)

752

701

759

708

global_set_log_function.restype = None

760

709

761

710

deinit = _library.gnutls_deinit

762

deinit.argtypes = [ClientSession]

711

deinit.argtypes = [session_t]

763

712

deinit.restype = None

764

713

765

714

handshake = _library.gnutls_handshake

766

handshake.argtypes = [ClientSession]

767

handshake.restype = ctypes.c_int

715

handshake.argtypes = [session_t]

716

handshake.restype = _error_code

768

717

handshake.errcheck = _retry_on_error

769

718

770

719

transport_set_ptr = _library.gnutls_transport_set_ptr

771

transport_set_ptr.argtypes = [ClientSession, transport_ptr_t]

720

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

772

721

transport_set_ptr.restype = None

773

722

774

723

bye = _library.gnutls_bye

775

bye.argtypes = [ClientSession, close_request_t]

776

bye.restype = ctypes.c_int

724

bye.argtypes = [session_t, close_request_t]

725

bye.restype = _error_code

777

726

bye.errcheck = _retry_on_error

778

727

779

728

check_version = _library.gnutls_check_version

796

745

797

746

x509_crt_fmt_t = ctypes.c_int

798

747

799

# All the function declarations below are from

800

# gnutls/abstract.h

748

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

801

749

pubkey_init = _library.gnutls_pubkey_init

802

750

pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]

803

751

pubkey_init.restype = _error_code

817

765

pubkey_deinit.argtypes = [pubkey_t]

818

766

pubkey_deinit.restype = None

819

767

else:

820

# All the function declarations below are from

821

# gnutls/openpgp.h

768

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

822

769

823

770

openpgp_crt_init = _library.gnutls_openpgp_crt_init

824

771

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

830

777

openpgp_crt_fmt_t]

831

778

openpgp_crt_import.restype = _error_code

832

779

833

openpgp_crt_verify_self = \

834

_library.gnutls_openpgp_crt_verify_self

835

openpgp_crt_verify_self.argtypes = [

836

openpgp_crt_t,

837

ctypes.c_uint,

838

ctypes.POINTER(ctypes.c_uint),

839

]

780

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

781

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

782

ctypes.POINTER(ctypes.c_uint)]

840

783

openpgp_crt_verify_self.restype = _error_code

841

784

842

785

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

853

796

854

797

if check_version(b"3.6.4"):

855

798

certificate_type_get2 = _library.gnutls_certificate_type_get2

856

certificate_type_get2.argtypes = [ClientSession, ctypes.c_int]

799

certificate_type_get2.argtypes = [session_t, ctypes.c_int]

857

800

certificate_type_get2.restype = _error_code

858

801

859

802

# Remove non-public functions

871

814

connection.close()

872

815

873

816

874

class Client:

817

class Client(object):

875

818

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

876

819

877

820

Attributes:

878

approved: bool(); None if not yet approved/disapproved

821

approved: bool(); 'None' if not yet approved/disapproved

879

822

approval_delay: datetime.timedelta(); Time to wait for approval

880

823

approval_duration: datetime.timedelta(); Duration of one approval

881

824

checker: multiprocessing.Process(); a running checker process used

882

to see if the client lives. None if no process is

825

to see if the client lives. 'None' if no process is

883

826

running.

884

827

checker_callback_tag: a GLib event source tag, or None

885

828

checker_command: string; External command which is run to check

1009

952

self.last_enabled = None

1010

953

self.expires = None

1011

954

1012

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

1013

log.debug(" Key ID: %s", self.key_id)

1014

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

955

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

956

logger.debug(" Key ID: %s", self.key_id)

957

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

1015

958

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

1016

959

datetime.datetime.utcnow())

1017

960

1045

988

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

1046

989

# Already enabled

1047

990

return

991

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

1048

992

self.enabled = True

1049

993

self.last_enabled = datetime.datetime.utcnow()

1050

994

self.init_checker()

1055

999

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

1056

1000

return False

1057

1001

if not quiet:

1058

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

1002

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

1059

1003

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

1060

1004

GLib.source_remove(self.disable_initiator_tag)

1061

1005

self.disable_initiator_tag = None

1073

1017

def __del__(self):

1074

1018

self.disable()

1075

1019

1076

def init_checker(self, randomize_start=False):

1077

# Schedule a new checker to be started a randomly selected

1078

# time (a fraction of 'interval') from now. This spreads out

1079

# the startup of checkers over time when the server is

1080

# started.

1020

def init_checker(self):

1021

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

1022

# and every interval from then on.

1081

1023

if self.checker_initiator_tag is not None:

1082

1024

GLib.source_remove(self.checker_initiator_tag)

1083

interval_milliseconds = int(self.interval.total_seconds()

1084

* 1000)

1085

if randomize_start:

1086

delay_milliseconds = random.randrange(

1087

interval_milliseconds + 1)

1088

else:

1089

delay_milliseconds = interval_milliseconds

1090

1025

self.checker_initiator_tag = GLib.timeout_add(

1091

delay_milliseconds, self.start_checker, randomize_start)

1092

delay = datetime.timedelta(0, 0, 0, delay_milliseconds)

1093

# A checker might take up to an 'interval' of time, so we can

1094

# expire at the soonest one interval after a checker was

1095

# started. Since the initial checker is delayed, the expire

1096

# time might have to be extended.

1097

now = datetime.datetime.utcnow()

1098

self.expires = now + delay + self.interval

1099

# Schedule a disable() at expire time

1026

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

1027

self.start_checker)

1028

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

1100

1029

if self.disable_initiator_tag is not None:

1101

1030

GLib.source_remove(self.disable_initiator_tag)

1102

1031

self.disable_initiator_tag = GLib.timeout_add(

1103

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

1104

self.disable)

1032

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

1033

# Also start a new checker *right now*.

1034

self.start_checker()

1105

1035

1106

1036

def checker_callback(self, source, condition, connection,

1107

1037

command):

1109

1039

# Read return code from connection (see call_pipe)

1110

1040

returncode = connection.recv()

1111

1041

connection.close()

1112

if self.checker is not None:

1113

self.checker.join()

1042

self.checker.join()

1114

1043

self.checker_callback_tag = None

1115

1044

self.checker = None

1116

1045

1118

1047

self.last_checker_status = returncode

1119

1048

self.last_checker_signal = None

1120

1049

if self.last_checker_status == 0:

1121

log.info("Checker for %(name)s succeeded", vars(self))

1050

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

1051

vars(self))

1122

1052

self.checked_ok()

1123

1053

else:

1124

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

1054

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

1125

1055

else:

1126

1056

self.last_checker_status = -1

1127

1057

self.last_checker_signal = -returncode

1128

log.warning("Checker for %(name)s crashed?", vars(self))

1058

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

1059

vars(self))

1129

1060

return False

1130

1061

1131

1062

def checked_ok(self):

1150

1081

def need_approval(self):

1151

1082

self.last_approval_request = datetime.datetime.utcnow()

1152

1083

1153

def start_checker(self, start_was_randomized=False):

1084

def start_checker(self):

1154

1085

"""Start a new checker subprocess if one is not running.

1155

1086

1156

1087

If a checker already exists, leave it running and do

1165

1096

# should be.

1166

1097

1167

1098

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

1168

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

1099

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

1169

1100

self.checker.join()

1170

1101

self.checker = None

1171

1102

# Start a new checker if needed

1172

1103

if self.checker is None:

1173

1104

# Escape attributes for the shell

1174

1105

escaped_attrs = {

1175

attr: shlex.quote(str(getattr(self, attr)))

1106

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

1176

1107

for attr in self.runtime_expansions}

1177

1108

try:

1178

1109

command = self.checker_command % escaped_attrs

1179

1110

except TypeError as error:

1180

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

1181

self.checker_command, exc_info=error)

1111

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

1112

self.checker_command,

1113

exc_info=error)

1182

1114

return True # Try again later

1183

1115

self.current_checker_command = command

1184

log.info("Starting checker %r for %s", command, self.name)

1116

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

1117

self.name)

1185

1118

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

1186

1119

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

1187

1120

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

1203

1136

kwargs=popen_args)

1204

1137

self.checker.start()

1205

1138

self.checker_callback_tag = GLib.io_add_watch(

1206

GLib.IOChannel.unix_new(pipe[0].fileno()),

1207

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

1139

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

1208

1140

self.checker_callback, pipe[0], command)

1209

if start_was_randomized:

1210

# We were started after a random delay; Schedule a new

1211

# checker to be started an 'interval' from now, and every

1212

# interval from then on.

1213

now = datetime.datetime.utcnow()

1214

self.checker_initiator_tag = GLib.timeout_add(

1215

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

1216

self.start_checker)

1217

self.expires = max(self.expires, now + self.interval)

1218

# Don't start a new checker again after same random delay

1219

return False

1220

1141

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

1221

1142

return True

1222

1143

1227

1148

self.checker_callback_tag = None

1228

1149

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

1229

1150

return

1230

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

1151

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

1231

1152

self.checker.terminate()

1232

1153

self.checker = None

1233

1154

1260

1181

func._dbus_name = func.__name__

1261

1182

if func._dbus_name.endswith("_dbus_property"):

1262

1183

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

1263

func._dbus_get_args_options = {"byte_arrays": byte_arrays}

1184

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

1264

1185

return func

1265

1186

1266

1187

return decorator

1355

1276

1356

1277

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1357

1278

out_signature="s",

1358

path_keyword="object_path",

1359

connection_keyword="connection")

1279

path_keyword='object_path',

1280

connection_keyword='connection')

1360

1281

def Introspect(self, object_path, connection):

1361

1282

"""Overloading of standard D-Bus method.

1362

1283

1411

1332

document.unlink()

1412

1333

except (AttributeError, xml.dom.DOMException,

1413

1334

xml.parsers.expat.ExpatError) as error:

1414

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

1415

exc_info=error)

1335

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

1336

exc_info=error)

1416

1337

return xmlstring

1417

1338

1418

1339

1476

1397

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

1477

1398

"'ay' signature {!r}"

1478

1399

.format(prop._dbus_signature))

1479

value = dbus.ByteArray(bytes(value))

1400

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

1401

for byte in value))

1480

1402

prop(value)

1481

1403

1482

1404

@dbus.service.method(dbus.PROPERTIES_IFACE,

1515

1437

1516

1438

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1517

1439

out_signature="s",

1518

path_keyword="object_path",

1519

connection_keyword="connection")

1440

path_keyword='object_path',

1441

connection_keyword='connection')

1520

1442

def Introspect(self, object_path, connection):

1521

1443

"""Overloading of standard D-Bus method.

1522

1444

1578

1500

document.unlink()

1579

1501

except (AttributeError, xml.dom.DOMException,

1580

1502

xml.parsers.expat.ExpatError) as error:

1581

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

1582

exc_info=error)

1503

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

1504

exc_info=error)

1583

1505

return xmlstring

1584

1506

1585

1507

1617

1539

1618

1540

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1619

1541

out_signature="s",

1620

path_keyword="object_path",

1621

connection_keyword="connection")

1542

path_keyword='object_path',

1543

connection_keyword='connection')

1622

1544

def Introspect(self, object_path, connection):

1623

1545

"""Overloading of standard D-Bus method.

1624

1546

1649

1571

document.unlink()

1650

1572

except (AttributeError, xml.dom.DOMException,

1651

1573

xml.parsers.expat.ExpatError) as error:

1652

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

1653

exc_info=error)

1574

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

1575

exc_info=error)

1654

1576

return xmlstring

1655

1577

1656

1578

2287

2209

del _interface

2288

2210

2289

2211

2290

class ProxyClient:

2212

class ProxyClient(object):

2291

2213

def __init__(self, child_pipe, key_id, fpr, address):

2292

2214

self._pipe = child_pipe

2293

self._pipe.send(("init", key_id, fpr, address))

2215

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

2294

2216

if not self._pipe.recv():

2295

2217

raise KeyError(key_id or fpr)

2296

2218

2297

2219

def __getattribute__(self, name):

2298

if name == "_pipe":

2220

if name == '_pipe':

2299

2221

return super(ProxyClient, self).__getattribute__(name)

2300

self._pipe.send(("getattr", name))

2222

self._pipe.send(('getattr', name))

2301

2223

data = self._pipe.recv()

2302

if data[0] == "data":

2224

if data[0] == 'data':

2303

2225

return data[1]

2304

if data[0] == "function":

2226

if data[0] == 'function':

2305

2227

2306

2228

def func(*args, **kwargs):

2307

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

2229

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

2308

2230

return self._pipe.recv()[1]

2309

2231

2310

2232

return func

2311

2233

2312

2234

def __setattr__(self, name, value):

2313

if name == "_pipe":

2235

if name == '_pipe':

2314

2236

return super(ProxyClient, self).__setattr__(name, value)

2315

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

2237

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

2316

2238

2317

2239

2318

2240

class ClientHandler(socketserver.BaseRequestHandler, object):

2323

2245

2324

2246

def handle(self):

2325

2247

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

2326

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

2327

str(self.client_address))

2328

log.debug("Pipe FD: %d", self.server.child_pipe.fileno())

2248

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

2249

str(self.client_address))

2250

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

2251

self.server.child_pipe.fileno())

2329

2252

2330

2253

session = gnutls.ClientSession(self.request)

2331

2254

2332

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

2255

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

2333

2256

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

2334

2257

# "+COMP-NULL", "+CTYPE-OPENPGP",

2335

2258

# "+DHE-DSS"))

2337

2260

priority = self.server.gnutls_priority

2338

2261

if priority is None:

2339

2262

priority = "NORMAL"

2340

gnutls.priority_set_direct(session,

2341

priority.encode("utf-8"), None)

2263

gnutls.priority_set_direct(session._c_object,

2264

priority.encode("utf-8"),

2265

None)

2342

2266

2343

2267

# Start communication using the Mandos protocol

2344

2268

# Get protocol number

2345

2269

line = self.request.makefile().readline()

2346

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

2270

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

2347

2271

try:

2348

2272

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

2349

2273

raise RuntimeError(line)

2350

2274

except (ValueError, IndexError, RuntimeError) as error:

2351

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

2275

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

2352

2276

return

2353

2277

2354

2278

# Start GnuTLS connection

2355

2279

try:

2356

2280

session.handshake()

2357

2281

except gnutls.Error as error:

2358

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

2282

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

2359

2283

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

2360

2284

# established. Just abandon the request.

2361

2285

return

2362

log.debug("Handshake succeeded")

2286

logger.debug("Handshake succeeded")

2363

2287

2364

2288

approval_required = False

2365

2289

try:

2369

2293

key_id = self.key_id(

2370

2294

self.peer_certificate(session))

2371

2295

except (TypeError, gnutls.Error) as error:

2372

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

2296

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

2373

2297

return

2374

log.debug("Key ID: %s",

2375

key_id.decode("utf-8",

2376

errors="replace"))

2298

logger.debug("Key ID: %s", key_id)

2377

2299

2378

2300

else:

2379

2301

key_id = b""

2381

2303

fpr = self.fingerprint(

2382

2304

self.peer_certificate(session))

2383

2305

except (TypeError, gnutls.Error) as error:

2384

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

2306

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

2385

2307

return

2386

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

2308

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

2387

2309

2388

2310

try:

2389

2311

client = ProxyClient(child_pipe, key_id, fpr,

2398

2320

2399

2321

while True:

2400

2322

if not client.enabled:

2401

log.info("Client %s is disabled", client.name)

2323

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

2324

client.name)

2402

2325

if self.server.use_dbus:

2403

2326

# Emit D-Bus signal

2404

2327

client.Rejected("Disabled")

2408

2331

# We are approved or approval is disabled

2409

2332

break

2410

2333

elif client.approved is None:

2411

log.info("Client %s needs approval",

2412

client.name)

2334

logger.info("Client %s needs approval",

2335

client.name)

2413

2336

if self.server.use_dbus:

2414

2337

# Emit D-Bus signal

2415

2338

client.NeedApproval(

2416

2339

client.approval_delay.total_seconds()

2417

2340

* 1000, client.approved_by_default)

2418

2341

else:

2419

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

2420

client.name)

2342

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

2343

client.name)

2421

2344

if self.server.use_dbus:

2422

2345

# Emit D-Bus signal

2423

2346

client.Rejected("Denied")

2431

2354

time2 = datetime.datetime.now()

2432

2355

if (time2 - time) >= delay:

2433

2356

if not client.approved_by_default:

2434

log.warning("Client %s timed out while"

2435

" waiting for approval",

2436

client.name)

2357

logger.warning("Client %s timed out while"

2358

" waiting for approval",

2359

client.name)

2437

2360

if self.server.use_dbus:

2438

2361

# Emit D-Bus signal

2439

2362

client.Rejected("Approval timed out")

2446

2369

try:

2447

2370

session.send(client.secret)

2448

2371

except gnutls.Error as error:

2449

log.warning("gnutls send failed", exc_info=error)

2372

logger.warning("gnutls send failed",

2373

exc_info=error)

2450

2374

return

2451

2375

2452

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

2376

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

2453

2377

# bump the timeout using extended_timeout

2454

2378

client.bump_timeout(client.extended_timeout)

2455

2379

if self.server.use_dbus:

2462

2386

try:

2463

2387

session.bye()

2464

2388

except gnutls.Error as error:

2465

log.warning("GnuTLS bye failed", exc_info=error)

2389

logger.warning("GnuTLS bye failed",

2390

exc_info=error)

2466

2391

2467

2392

@staticmethod

2468

2393

def peer_certificate(session):

2469

2394

"Return the peer's certificate as a bytestring"

2470

2395

try:

2471

cert_type = gnutls.certificate_type_get2(

2472

session, gnutls.CTYPE_PEERS)

2396

cert_type = gnutls.certificate_type_get2(session._c_object,

2397

gnutls.CTYPE_PEERS)

2473

2398

except AttributeError:

2474

cert_type = gnutls.certificate_type_get(session)

2399

cert_type = gnutls.certificate_type_get(session._c_object)

2475

2400

if gnutls.has_rawpk:

2476

2401

valid_cert_types = frozenset((gnutls.CRT_RAWPK,))

2477

2402

else:

2478

2403

valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))

2479

2404

# If not a valid certificate type...

2480

2405

if cert_type not in valid_cert_types:

2481

log.info("Cert type %r not in %r", cert_type,

2482

valid_cert_types)

2406

logger.info("Cert type %r not in %r", cert_type,

2407

valid_cert_types)

2483

2408

# ...return invalid data

2484

2409

return b""

2485

2410

list_size = ctypes.c_uint(1)

2486

2411

cert_list = (gnutls.certificate_get_peers

2487

(session, ctypes.byref(list_size)))

2412

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

2488

2413

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

2489

2414

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

2490

2415

if list_size.value == 0:

2512

2437

buf = ctypes.create_string_buffer(32)

2513

2438

buf_len = ctypes.c_size_t(len(buf))

2514

2439

# Get the key ID from the raw public key into the buffer

2515

gnutls.pubkey_get_key_id(

2516

pubkey,

2517

gnutls.KEYID_USE_SHA256,

2518

ctypes.cast(ctypes.byref(buf),

2519

ctypes.POINTER(ctypes.c_ubyte)),

2520

ctypes.byref(buf_len))

2440

gnutls.pubkey_get_key_id(pubkey,

2441

gnutls.KEYID_USE_SHA256,

2442

ctypes.cast(ctypes.byref(buf),

2443

ctypes.POINTER(ctypes.c_ubyte)),

2444

ctypes.byref(buf_len))

2521

2445

# Deinit the certificate

2522

2446

gnutls.pubkey_deinit(pubkey)

2523

2447

2564

2488

return hex_fpr

2565

2489

2566

2490

2567

class MultiprocessingMixIn:

2491

class MultiprocessingMixIn(object):

2568

2492

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

2569

2493

2570

2494

def sub_process_main(self, request, address):

2582

2506

return proc

2583

2507

2584

2508

2585

class MultiprocessingMixInWithPipe(MultiprocessingMixIn):

2509

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2586

2510

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

2587

2511

2588

2512

def process_request(self, request, client_address):

2603

2527

2604

2528

2605

2529

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2606

socketserver.TCPServer):

2607

"""IPv6-capable TCP server. Accepts None as address and/or port

2530

socketserver.TCPServer, object):

2531

"""IPv6-capable TCP server. Accepts 'None' as address and/or port

2608

2532

2609

2533

Attributes:

2610

2534

enabled: Boolean; whether this server is activated yet

2661

2585

if SO_BINDTODEVICE is None:

2662

2586

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

2663

2587

# common enough.

2664

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

2588

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

2665

2589

SO_BINDTODEVICE = 25

2666

2590

try:

2667

2591

self.socket.setsockopt(

2669

2593

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

2670

2594

except socket.error as error:

2671

2595

if error.errno == errno.EPERM:

2672

log.error("No permission to bind to interface %s",

2673

self.interface)

2596

logger.error("No permission to bind to"

2597

" interface %s", self.interface)

2674

2598

elif error.errno == errno.ENOPROTOOPT:

2675

log.error("SO_BINDTODEVICE not available; cannot"

2676

" bind to interface %s", self.interface)

2599

logger.error("SO_BINDTODEVICE not available;"

2600

" cannot bind to interface %s",

2601

self.interface)

2677

2602

elif error.errno == errno.ENODEV:

2678

log.error("Interface %s does not exist, cannot"

2679

" bind", self.interface)

2603

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

2604

" cannot bind", self.interface)

2680

2605

else:

2681

2606

raise

2682

2607

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

2741

2666

def add_pipe(self, parent_pipe, proc):

2742

2667

# Call "handle_ipc" for both data and EOF events

2743

2668

GLib.io_add_watch(

2744

GLib.IOChannel.unix_new(parent_pipe.fileno()),

2745

GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,

2669

parent_pipe.fileno(),

2670

GLib.IO_IN | GLib.IO_HUP,

2746

2671

functools.partial(self.handle_ipc,

2747

2672

parent_pipe=parent_pipe,

2748

2673

proc=proc))

2761

2686

request = parent_pipe.recv()

2762

2687

command = request[0]

2763

2688

2764

if command == "init":

2689

if command == 'init':

2765

2690

key_id = request[1].decode("ascii")

2766

2691

fpr = request[2].decode("ascii")

2767

2692

address = request[3]

2768

2693

2769

2694

for c in self.clients.values():

2770

if key_id == ("E3B0C44298FC1C149AFBF4C8996FB924"

2771

"27AE41E4649B934CA495991B7852B855"):

2695

if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":

2772

2696

continue

2773

2697

if key_id and c.key_id == key_id:

2774

2698

client = c

2777

2701

client = c

2778

2702

break

2779

2703

else:

2780

log.info("Client not found for key ID: %s, address:"

2781

" %s", key_id or fpr, address)

2704

logger.info("Client not found for key ID: %s, address"

2705

": %s", key_id or fpr, address)

2782

2706

if self.use_dbus:

2783

2707

# Emit D-Bus signal

2784

2708

mandos_dbus_service.ClientNotFound(key_id or fpr,

2787

2711

return False

2788

2712

2789

2713

GLib.io_add_watch(

2790

GLib.IOChannel.unix_new(parent_pipe.fileno()),

2791

GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,

2714

parent_pipe.fileno(),

2715

GLib.IO_IN | GLib.IO_HUP,

2792

2716

functools.partial(self.handle_ipc,

2793

2717

parent_pipe=parent_pipe,

2794

2718

proc=proc,

2797

2721

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

2798

2722

# same fileno

2799

2723

return False

2800

if command == "funcall":

2724

if command == 'funcall':

2801

2725

funcname = request[1]

2802

2726

args = request[2]

2803

2727

kwargs = request[3]

2804

2728

2805

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

2729

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

2806

2730

funcname)(*args,

2807

2731

**kwargs)))

2808

2732

2809

if command == "getattr":

2733

if command == 'getattr':

2810

2734

attrname = request[1]

2811

2735

if isinstance(client_object.__getattribute__(attrname),

2812

collections.abc.Callable):

2813

parent_pipe.send(("function", ))

2736

collections.Callable):

2737

parent_pipe.send(('function', ))

2814

2738

else:

2815

2739

parent_pipe.send((

2816

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

2740

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

2817

2741

2818

if command == "setattr":

2742

if command == 'setattr':

2819

2743

attrname = request[1]

2820

2744

value = request[2]

2821

2745

setattr(client_object, attrname, value)

2826

2750

def rfc3339_duration_to_delta(duration):

2827

2751

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

2828

2752

2829

>>> timedelta = datetime.timedelta

2830

>>> rfc3339_duration_to_delta("P7D") == timedelta(7)

2831

True

2832

>>> rfc3339_duration_to_delta("PT60S") == timedelta(0, 60)

2833

True

2834

>>> rfc3339_duration_to_delta("PT60M") == timedelta(0, 3600)

2835

True

2836

>>> rfc3339_duration_to_delta("PT24H") == timedelta(1)

2837

True

2838

>>> rfc3339_duration_to_delta("P1W") == timedelta(7)

2839

True

2840

>>> rfc3339_duration_to_delta("PT5M30S") == timedelta(0, 330)

2841

True

2842

>>> rfc3339_duration_to_delta("P1DT3M20S") == timedelta(1, 200)

2843

True

2844

>>> del timedelta

2753

>>> rfc3339_duration_to_delta("P7D")

2754

datetime.timedelta(7)

2755

>>> rfc3339_duration_to_delta("PT60S")

2756

datetime.timedelta(0, 60)

2757

>>> rfc3339_duration_to_delta("PT60M")

2758

datetime.timedelta(0, 3600)

2759

>>> rfc3339_duration_to_delta("PT24H")

2760

datetime.timedelta(1)

2761

>>> rfc3339_duration_to_delta("P1W")

2762

datetime.timedelta(7)

2763

>>> rfc3339_duration_to_delta("PT5M30S")

2764

datetime.timedelta(0, 330)

2765

>>> rfc3339_duration_to_delta("P1DT3M20S")

2766

datetime.timedelta(1, 200)

2845

2767

"""

2846

2768

2847

2769

# Parsing an RFC 3339 duration with regular expressions is not

2927

2849

def string_to_delta(interval):

2928

2850

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

2929

2851

2930

>>> string_to_delta("7d") == datetime.timedelta(7)

2931

True

2932

>>> string_to_delta("60s") == datetime.timedelta(0, 60)

2933

True

2934

>>> string_to_delta("60m") == datetime.timedelta(0, 3600)

2935

True

2936

>>> string_to_delta("24h") == datetime.timedelta(1)

2937

True

2938

>>> string_to_delta("1w") == datetime.timedelta(7)

2939

True

2940

>>> string_to_delta("5m 30s") == datetime.timedelta(0, 330)

2941

True

2852

>>> string_to_delta('7d')

2853

datetime.timedelta(7)

2854

>>> string_to_delta('60s')

2855

datetime.timedelta(0, 60)

2856

>>> string_to_delta('60m')

2857

datetime.timedelta(0, 3600)

2858

>>> string_to_delta('24h')

2859

datetime.timedelta(1)

2860

>>> string_to_delta('1w')

2861

datetime.timedelta(7)

2862

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

2863

datetime.timedelta(0, 330)

2942

2864

"""

2943

2865

2944

2866

try:

3046

2968

3047

2969

options = parser.parse_args()

3048

2970

2971

if options.check:

2972

import doctest

2973

fail_count, test_count = doctest.testmod()

2974

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

2975

3049

2976

# Default values for config file for server-global settings

3050

2977

if gnutls.has_rawpk:

3051

2978

priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"

3071

2998

del priority

3072

2999

3073

3000

# Parse config file for server-global settings

3074

server_config = configparser.ConfigParser(server_defaults)

3001

server_config = configparser.SafeConfigParser(server_defaults)

3075

3002

del server_defaults

3076

3003

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

3077

# Convert the ConfigParser object to a dict

3004

# Convert the SafeConfigParser object to a dict

3078

3005

server_settings = server_config.defaults()

3079

3006

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

3080

3007

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

3147

3074

3148

3075

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

3149

3076

syslogger.setFormatter(

3150

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

3151

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

3077

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

3078

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

3152

3079

server_settings["servicename"])))

3153

3080

3154

3081

# Parse config file with clients

3155

client_config = configparser.ConfigParser(Client.client_defaults)

3082

client_config = configparser.SafeConfigParser(Client

3083

.client_defaults)

3156

3084

client_config.read(os.path.join(server_settings["configdir"],

3157

3085

"clients.conf"))

3158

3086

3178

3106

try:

3179

3107

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

3180

3108

except IOError as e:

3181

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

3182

exc_info=e)

3109

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

3110

exc_info=e)

3183

3111

3184

3112

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

3185

3113

("mandos", "mandos"),

3196

3124

try:

3197

3125

os.setgid(gid)

3198

3126

os.setuid(uid)

3199

log.debug("Did setuid/setgid to %s:%s", uid, gid)

3127

if debug:

3128

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

3129

gid))

3200

3130

except OSError as error:

3201

log.warning("Failed to setuid/setgid to %s:%s: %s", uid, gid,

3202

os.strerror(error.errno))

3131

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

3132

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

3203

3133

if error.errno != errno.EPERM:

3204

3134

raise

3205

3135

3212

3142

3213

3143

@gnutls.log_func

3214

3144

def debug_gnutls(level, string):

3215

log.debug("GnuTLS: %s",

3216

string[:-1].decode("utf-8", errors="replace"))

3145

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

3217

3146

3218

3147

gnutls.global_set_log_function(debug_gnutls)

3219

3148

3228

3157

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

3229

3158

daemon()

3230

3159

3231

if gi.version_info < (3, 10, 2):

3232

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

3233

# need to inform GLib that threads will be used.

3234

GLib.threads_init()

3160

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

3161

# to inform GLib that threads will be used.

3162

GLib.threads_init()

3235

3163

3236

3164

global main_loop

3237

3165

# From the Avahi example code

3248

3176

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

3249

3177

do_not_queue=True)

3250

3178

except dbus.exceptions.DBusException as e:

3251

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

3179

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

3252

3180

use_dbus = False

3253

3181

server_settings["use_dbus"] = False

3254

3182

tcp_server.use_dbus = False

3313

3241

if isinstance(s, bytes)

3314

3242

else s) for s in

3315

3243

value["client_structure"]]

3316

# .name, .host, and .checker_command

3317

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

3244

# .name & .host

3245

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

3318

3246

if isinstance(value[k], bytes):

3319

3247

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

3320

3248

if "key_id" not in value:

3330

3258

for key, value in

3331

3259

bytes_old_client_settings.items()}

3332

3260

del bytes_old_client_settings

3333

# .host and .checker_command

3261

# .host

3334

3262

for value in old_client_settings.values():

3335

for attribute in ("host", "checker_command"):

3336

if isinstance(value[attribute], bytes):

3337

value[attribute] = (value[attribute]

3338

.decode("utf-8"))

3263

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

3264

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

3265

.decode("utf-8"))

3339

3266

os.remove(stored_state_path)

3340

3267

except IOError as e:

3341

3268

if e.errno == errno.ENOENT:

3342

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

3343

" %s", os.strerror(e.errno))

3269

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

3270

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

3344

3271

else:

3345

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

3346

exc_info=e)

3272

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

3273

exc_info=e)

3347

3274

raise

3348

3275

except EOFError as e:

3349

log.warning("Could not load persistent state: EOFError:",

3350

exc_info=e)

3276

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

3277

"EOFError:",

3278

exc_info=e)

3351

3279

3352

3280

with PGPEngine() as pgp:

3353

3281

for client_name, client in clients_data.items():

3380

3308

if client["enabled"]:

3381

3309

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

3382

3310

if not client["last_checked_ok"]:

3383

log.warning("disabling client %s - Client"

3384

" never performed a successful"

3385

" checker", client_name)

3311

logger.warning(

3312

"disabling client {} - Client never "

3313

"performed a successful checker".format(

3314

client_name))

3386

3315

client["enabled"] = False

3387

3316

elif client["last_checker_status"] != 0:

3388

log.warning("disabling client %s - Client"

3389

" last checker failed with error"

3390

" code %s", client_name,

3391

client["last_checker_status"])

3317

logger.warning(

3318

"disabling client {} - Client last"

3319

" checker failed with error code"

3320

" {}".format(

3321

client_name,

3322

client["last_checker_status"]))

3392

3323

client["enabled"] = False

3393

3324

else:

3394

3325

client["expires"] = (

3395

3326

datetime.datetime.utcnow()

3396

3327

+ client["timeout"])

3397

log.debug("Last checker succeeded, keeping %s"

3398

" enabled", client_name)

3328

logger.debug("Last checker succeeded,"

3329

" keeping {} enabled".format(

3330

client_name))

3399

3331

try:

3400

3332

client["secret"] = pgp.decrypt(

3401

3333

client["encrypted_secret"],

3402

3334

client_settings[client_name]["secret"])

3403

3335

except PGPError:

3404

3336

# If decryption fails, we use secret from new settings

3405

log.debug("Failed to decrypt %s old secret",

3406

client_name)

3337

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

3338

client_name))

3407

3339

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

3408

3340

["secret"])

3409

3341

3423

3355

server_settings=server_settings)

3424

3356

3425

3357

if not tcp_server.clients:

3426

log.warning("No clients defined")

3358

logger.warning("No clients defined")

3427

3359

3428

3360

if not foreground:

3429

3361

if pidfile is not None:

3432

3364

with pidfile:

3433

3365

print(pid, file=pidfile)

3434

3366

except IOError:

3435

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

3436

pidfilename, pid)

3367

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

3368

pidfilename, pid)

3437

3369

del pidfile

3438

3370

del pidfilename

3439

3371

3589

3521

3590

3522

try:

3591

3523

with tempfile.NamedTemporaryFile(

3592

mode="wb",

3524

mode='wb',

3593

3525

suffix=".pickle",

3594

prefix="clients-",

3526

prefix='clients-',

3595

3527

dir=os.path.dirname(stored_state_path),

3596

3528

delete=False) as stored_state:

3597

3529

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

3605

3537

except NameError:

3606

3538

pass

3607

3539

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

3608

log.warning("Could not save persistent state: %s",

3609

os.strerror(e.errno))

3540

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

3541

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

3610

3542

else:

3611

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

3612

exc_info=e)

3543

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

3544

exc_info=e)

3613

3545

raise

3614

3546

3615

3547

# Delete all clients, and settings from config

3632

3564

mandos_dbus_service.client_added_signal(client)

3633

3565

# Need to initiate checking of clients

3634

3566

if client.enabled:

3635

client.init_checker(randomize_start=True)

3567

client.init_checker()

3636

3568

3637

3569

tcp_server.enable()

3638

3570

tcp_server.server_activate()

3641

3573

if zeroconf:

3642

3574

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

3643

3575

if use_ipv6:

3644

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

3645

" scope_id %d", *tcp_server.socket.getsockname())

3576

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

3577

" flowinfo %d, scope_id %d",

3578

*tcp_server.socket.getsockname())

3646

3579

else: # IPv4

3647

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

3648

*tcp_server.socket.getsockname())

3580

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

3581

*tcp_server.socket.getsockname())

3649

3582

3650

3583

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

3651

3584

3655

3588

try:

3656

3589

service.activate()

3657

3590

except dbus.exceptions.DBusException as error:

3658

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

3591

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

3659

3592

cleanup()

3660

3593

sys.exit(1)

3661

3594

# End of Avahi example code

3662

3595

3663

GLib.io_add_watch(

3664

GLib.IOChannel.unix_new(tcp_server.fileno()),

3665

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

3666

lambda *args, **kwargs: (tcp_server.handle_request

3667

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

3596

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

3597

lambda *args, **kwargs:

3598

(tcp_server.handle_request

3599

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

3668

3600

3669

log.debug("Starting main loop")

3601

logger.debug("Starting main loop")

3670

3602

main_loop.run()

3671

3603

except AvahiError as error:

3672

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

3604

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

3673

3605

cleanup()

3674

3606

sys.exit(1)

3675

3607

except KeyboardInterrupt:

3676

3608

if debug:

3677

3609

print("", file=sys.stderr)

3678

log.debug("Server received KeyboardInterrupt")

3679

log.debug("Server exiting")

3610

logger.debug("Server received KeyboardInterrupt")

3611

logger.debug("Server exiting")

3680

3612

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

3681

3613

cleanup()

3682

3614

3683

3684

def parse_test_args():

3685

# type: () -> argparse.Namespace

3686

parser = argparse.ArgumentParser(add_help=False)

3687

parser.add_argument("--check", action="store_true")

3688

parser.add_argument("--prefix", )

3689

args, unknown_args = parser.parse_known_args()

3690

if args.check:

3691

# Remove test options from sys.argv

3692

sys.argv[1:] = unknown_args

3693

return args

3694

3695

# Add all tests from doctest strings

3696

def load_tests(loader, tests, none):

3697

import doctest

3698

tests.addTests(doctest.DocTestSuite())

3699

return tests

3700

3701

if __name__ == "__main__":

3702

options = parse_test_args()

3703

try:

3704

if options.check:

3705

extra_test_prefix = options.prefix

3706

if extra_test_prefix is not None:

3707

if not (unittest.main(argv=[""], exit=False)

3708

.result.wasSuccessful()):

3709

sys.exit(1)

3710

class ExtraTestLoader(unittest.TestLoader):

3711

testMethodPrefix = extra_test_prefix

3712

# Call using ./scriptname --test [--verbose]

3713

unittest.main(argv=[""], testLoader=ExtraTestLoader())

3714

else:

3715

unittest.main(argv=[""])

3716

else:

3717

main()

3718

finally:

3719

logging.shutdown()

3720

3721

# Local Variables:

3722

# run-tests:

3723

# (lambda (&optional extra)

3724

# (if (not (funcall run-tests-in-test-buffer default-directory

3725

# extra))

3726

# (funcall show-test-buffer-in-test-window)

3727

# (funcall remove-test-window)

3728

# (if extra (message "Extra tests run successfully!"))))

3729

# run-tests-in-test-buffer:

3730

# (lambda (dir &optional extra)

3731

# (with-current-buffer (get-buffer-create "*Test*")

3732

# (setq buffer-read-only nil

3733

# default-directory dir)

3734

# (erase-buffer)

3735

# (compilation-mode))

3736

# (let ((process-result

3737

# (let ((inhibit-read-only t))

3738

# (process-file-shell-command

3739

# (funcall get-command-line extra) nil "*Test*"))))

3740

# (and (numberp process-result)

3741

# (= process-result 0))))

3742

# get-command-line:

3743

# (lambda (&optional extra)

3744

# (let ((quoted-script

3745

# (shell-quote-argument (funcall get-script-name))))

3746

# (format

3747

# (concat "%s --check" (if extra " --prefix=atest" ""))

3748

# quoted-script)))

3749

# get-script-name:

3750

# (lambda ()

3751

# (if (fboundp 'file-local-name)

3752

# (file-local-name (buffer-file-name))

3753

# (or (file-remote-p (buffer-file-name) 'localname)

3754

# (buffer-file-name))))

3755

# remove-test-window:

3756

# (lambda ()

3757

# (let ((test-window (get-buffer-window "*Test*")))

3758

# (if test-window (delete-window test-window))))

3759

# show-test-buffer-in-test-window:

3760

# (lambda ()

3761

# (when (not (get-buffer-window-list "*Test*"))

3762

# (setq next-error-last-buffer (get-buffer "*Test*"))

3763

# (let* ((side (if (>= (window-width) 146) 'right 'bottom))

3764

# (display-buffer-overriding-action

3765

# `((display-buffer-in-side-window) (side . ,side)

3766

# (window-height . fit-window-to-buffer)

3767

# (window-width . fit-window-to-buffer))))

3768

# (display-buffer "*Test*"))))

3769

# eval:

3770

# (progn

3771

# (let* ((run-extra-tests (lambda () (interactive)

3772

# (funcall run-tests t)))

3773

# (inner-keymap `(keymap (116 . ,run-extra-tests))) ; t

3774

# (outer-keymap `(keymap (3 . ,inner-keymap)))) ; C-c

3775

# (setq minor-mode-overriding-map-alist

3776

# (cons `(run-tests . ,outer-keymap)

3777

# minor-mode-overriding-map-alist)))

3778

# (add-hook 'after-save-hook run-tests 90 t))

3779

# End:

3615

3616

if __name__ == '__main__':

3617

main()