/mandos/trunk : revision 1151

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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 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.major == 2:

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str = unicode

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if sys.version_info < (3, 2):

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configparser.Configparser = configparser.SafeConfigParser

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version = "1.8.16"

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version = "1.8.6"

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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(

438

"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:

461

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"""

478

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:

486

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if bad_states[state] is not None:

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if error is None:

488

log.error(bad_states[state])

463

logger.error(bad_states[state])

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else:

490

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"):

498

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:

506

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

482

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

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else:

508

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

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

509

485

510

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def activate(self):

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

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499

class AvahiServiceToSyslog(AvahiService):

524

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

525

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

526

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

527

**kwargs)

502

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

528

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syslogger.setFormatter(logging.Formatter(

529

"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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534

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# Pretend that we have a GnuTLS module

535

class gnutls:

510

class gnutls(object):

536

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

537

512

538

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

562

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OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

563

538

564

539

# Types

565

class _session_int(ctypes.Structure):

540

class session_int(ctypes.Structure):

566

541

_fields_ = []

567

session_t = ctypes.POINTER(_session_int)

542

session_t = ctypes.POINTER(session_int)

568

543

569

544

class certificate_credentials_st(ctypes.Structure):

570

545

_fields_ = []

573

548

certificate_type_t = ctypes.c_int

574

549

575

550

class datum_t(ctypes.Structure):

576

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

577

("size", ctypes.c_uint)]

551

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

552

('size', ctypes.c_uint)]

578

553

579

class _openpgp_crt_int(ctypes.Structure):

554

class openpgp_crt_int(ctypes.Structure):

580

555

_fields_ = []

581

openpgp_crt_t = ctypes.POINTER(_openpgp_crt_int)

556

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

582

557

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

583

558

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

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559

credentials_type_t = ctypes.c_int

593

568

# gnutls.strerror()

594

569

self.code = code

595

570

if message is None and code is not None:

596

message = gnutls.strerror(code).decode(

597

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

571

message = gnutls.strerror(code)

598

572

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

599

573

message, *args)

600

574

601

575

class CertificateSecurityError(Error):

602

576

pass

603

577

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

578

# Classes

630

class Credentials(With_from_param):

579

class Credentials(object):

631

580

def __init__(self):

632

self._as_parameter_ = gnutls.certificate_credentials_t()

633

gnutls.certificate_allocate_credentials(self)

581

self._c_object = gnutls.certificate_credentials_t()

582

gnutls.certificate_allocate_credentials(

583

ctypes.byref(self._c_object))

634

584

self.type = gnutls.CRD_CERTIFICATE

635

585

636

586

def __del__(self):

637

gnutls.certificate_free_credentials(self)

587

gnutls.certificate_free_credentials(self._c_object)

638

588

639

class ClientSession(With_from_param):

589

class ClientSession(object):

640

590

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

641

self._as_parameter_ = gnutls.session_t()

591

self._c_object = gnutls.session_t()

642

592

gnutls_flags = gnutls.CLIENT

643

593

if gnutls.check_version(b"3.5.6"):

644

594

gnutls_flags |= gnutls.NO_TICKETS

645

595

if gnutls.has_rawpk:

646

596

gnutls_flags |= gnutls.ENABLE_RAWPK

647

gnutls.init(self, gnutls_flags)

597

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

648

598

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)

599

gnutls.set_default_priority(self._c_object)

600

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

601

gnutls.handshake_set_private_extensions(self._c_object,

602

True)

652

603

self.socket = socket

653

604

if credentials is None:

654

605

credentials = gnutls.Credentials()

655

gnutls.credentials_set(self, credentials.type,

656

credentials)

606

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

607

ctypes.cast(credentials._c_object,

608

ctypes.c_void_p))

657

609

self.credentials = credentials

658

610

659

611

def __del__(self):

660

gnutls.deinit(self)

612

gnutls.deinit(self._c_object)

661

613

662

614

def handshake(self):

663

return gnutls.handshake(self)

615

return gnutls.handshake(self._c_object)

664

616

665

617

def send(self, data):

666

618

data = bytes(data)

667

619

data_len = len(data)

668

620

while data_len > 0:

669

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

621

data_len -= gnutls.record_send(self._c_object,

622

data[-data_len:],

670

623

data_len)

671

624

672

625

def bye(self):

673

return gnutls.bye(self, gnutls.SHUT_RDWR)

626

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

674

627

675

628

# Error handling functions

676

629

def _error_code(result):

677

630

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

678

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

679

if result >= gnutls.E_SUCCESS:

631

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

632

if result >= 0:

680

633

return result

681

634

if result == gnutls.E_NO_CERTIFICATE_FOUND:

682

635

raise gnutls.CertificateSecurityError(code=result)

683

636

raise gnutls.Error(code=result)

684

637

685

def _retry_on_error(result, func, arguments,

686

_error_code=_error_code):

638

def _retry_on_error(result, func, arguments):

687

639

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

688

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

689

while result < gnutls.E_SUCCESS:

640

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

641

while result < 0:

690

642

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

691

643

return _error_code(result)

692

644

result = func(*arguments)

697

649

698

650

# Functions

699

651

priority_set_direct = _library.gnutls_priority_set_direct

700

priority_set_direct.argtypes = [ClientSession, ctypes.c_char_p,

652

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

701

653

ctypes.POINTER(ctypes.c_char_p)]

702

654

priority_set_direct.restype = _error_code

703

655

704

656

init = _library.gnutls_init

705

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

657

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

706

658

init.restype = _error_code

707

659

708

660

set_default_priority = _library.gnutls_set_default_priority

709

set_default_priority.argtypes = [ClientSession]

661

set_default_priority.argtypes = [session_t]

710

662

set_default_priority.restype = _error_code

711

663

712

664

record_send = _library.gnutls_record_send

713

record_send.argtypes = [ClientSession, ctypes.c_void_p,

665

record_send.argtypes = [session_t, ctypes.c_void_p,

714

666

ctypes.c_size_t]

715

667

record_send.restype = ctypes.c_ssize_t

716

668

record_send.errcheck = _retry_on_error

718

670

certificate_allocate_credentials = (

719

671

_library.gnutls_certificate_allocate_credentials)

720

672

certificate_allocate_credentials.argtypes = [

721

PointerTo(Credentials)]

673

ctypes.POINTER(certificate_credentials_t)]

722

674

certificate_allocate_credentials.restype = _error_code

723

675

724

676

certificate_free_credentials = (

725

677

_library.gnutls_certificate_free_credentials)

726

certificate_free_credentials.argtypes = [Credentials]

678

certificate_free_credentials.argtypes = [

679

certificate_credentials_t]

727

680

certificate_free_credentials.restype = None

728

681

729

682

handshake_set_private_extensions = (

730

683

_library.gnutls_handshake_set_private_extensions)

731

handshake_set_private_extensions.argtypes = [ClientSession,

684

handshake_set_private_extensions.argtypes = [session_t,

732

685

ctypes.c_int]

733

686

handshake_set_private_extensions.restype = None

734

687

735

688

credentials_set = _library.gnutls_credentials_set

736

credentials_set.argtypes = [ClientSession, credentials_type_t,

737

CastToVoidPointer(Credentials)]

689

credentials_set.argtypes = [session_t, credentials_type_t,

690

ctypes.c_void_p]

738

691

credentials_set.restype = _error_code

739

692

740

693

strerror = _library.gnutls_strerror

742

695

strerror.restype = ctypes.c_char_p

743

696

744

697

certificate_type_get = _library.gnutls_certificate_type_get

745

certificate_type_get.argtypes = [ClientSession]

698

certificate_type_get.argtypes = [session_t]

746

699

certificate_type_get.restype = _error_code

747

700

748

701

certificate_get_peers = _library.gnutls_certificate_get_peers

749

certificate_get_peers.argtypes = [ClientSession,

702

certificate_get_peers.argtypes = [session_t,

750

703

ctypes.POINTER(ctypes.c_uint)]

751

704

certificate_get_peers.restype = ctypes.POINTER(datum_t)

752

705

759

712

global_set_log_function.restype = None

760

713

761

714

deinit = _library.gnutls_deinit

762

deinit.argtypes = [ClientSession]

715

deinit.argtypes = [session_t]

763

716

deinit.restype = None

764

717

765

718

handshake = _library.gnutls_handshake

766

handshake.argtypes = [ClientSession]

767

handshake.restype = ctypes.c_int

719

handshake.argtypes = [session_t]

720

handshake.restype = _error_code

768

721

handshake.errcheck = _retry_on_error

769

722

770

723

transport_set_ptr = _library.gnutls_transport_set_ptr

771

transport_set_ptr.argtypes = [ClientSession, transport_ptr_t]

724

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

772

725

transport_set_ptr.restype = None

773

726

774

727

bye = _library.gnutls_bye

775

bye.argtypes = [ClientSession, close_request_t]

776

bye.restype = ctypes.c_int

728

bye.argtypes = [session_t, close_request_t]

729

bye.restype = _error_code

777

730

bye.errcheck = _retry_on_error

778

731

779

732

check_version = _library.gnutls_check_version

796

749

797

750

x509_crt_fmt_t = ctypes.c_int

798

751

799

# All the function declarations below are from

800

# gnutls/abstract.h

752

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

801

753

pubkey_init = _library.gnutls_pubkey_init

802

754

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

803

755

pubkey_init.restype = _error_code

817

769

pubkey_deinit.argtypes = [pubkey_t]

818

770

pubkey_deinit.restype = None

819

771

else:

820

# All the function declarations below are from

821

# gnutls/openpgp.h

772

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

822

773

823

774

openpgp_crt_init = _library.gnutls_openpgp_crt_init

824

775

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

830

781

openpgp_crt_fmt_t]

831

782

openpgp_crt_import.restype = _error_code

832

783

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

]

784

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

785

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

786

ctypes.POINTER(ctypes.c_uint)]

840

787

openpgp_crt_verify_self.restype = _error_code

841

788

842

789

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

853

800

854

801

if check_version(b"3.6.4"):

855

802

certificate_type_get2 = _library.gnutls_certificate_type_get2

856

certificate_type_get2.argtypes = [ClientSession, ctypes.c_int]

803

certificate_type_get2.argtypes = [session_t, ctypes.c_int]

857

804

certificate_type_get2.restype = _error_code

858

805

859

806

# Remove non-public functions

871

818

connection.close()

872

819

873

820

874

class Client:

821

class Client(object):

875

822

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

876

823

877

824

Attributes:

878

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

825

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

879

826

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

880

827

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

881

828

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

882

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

829

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

883

830

running.

884

831

checker_callback_tag: a GLib event source tag, or None

885

832

checker_command: string; External command which is run to check

1009

956

self.last_enabled = None

1010

957

self.expires = None

1011

958

1012

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

1013

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

1014

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

959

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

960

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

961

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

1015

962

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

1016

963

datetime.datetime.utcnow())

1017

964

1045

992

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

1046

993

# Already enabled

1047

994

return

995

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

1048

996

self.enabled = True

1049

997

self.last_enabled = datetime.datetime.utcnow()

1050

998

self.init_checker()

1055

1003

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

1056

1004

return False

1057

1005

if not quiet:

1058

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

1006

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

1059

1007

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

1060

1008

GLib.source_remove(self.disable_initiator_tag)

1061

1009

self.disable_initiator_tag = None

1073

1021

def __del__(self):

1074

1022

self.disable()

1075

1023

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.

1024

def init_checker(self):

1025

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

1026

# and every interval from then on.

1081

1027

if self.checker_initiator_tag is not None:

1082

1028

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

1029

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

1030

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

1031

self.start_checker)

1032

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

1100

1033

if self.disable_initiator_tag is not None:

1101

1034

GLib.source_remove(self.disable_initiator_tag)

1102

1035

self.disable_initiator_tag = GLib.timeout_add(

1103

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

1104

self.disable)

1036

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

1037

# Also start a new checker *right now*.

1038

self.start_checker()

1105

1039

1106

1040

def checker_callback(self, source, condition, connection,

1107

1041

command):

1109

1043

# Read return code from connection (see call_pipe)

1110

1044

returncode = connection.recv()

1111

1045

connection.close()

1112

if self.checker is not None:

1113

self.checker.join()

1046

self.checker.join()

1114

1047

self.checker_callback_tag = None

1115

1048

self.checker = None

1116

1049

1118

1051

self.last_checker_status = returncode

1119

1052

self.last_checker_signal = None

1120

1053

if self.last_checker_status == 0:

1121

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

1054

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

1055

vars(self))

1122

1056

self.checked_ok()

1123

1057

else:

1124

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

1058

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

1125

1059

else:

1126

1060

self.last_checker_status = -1

1127

1061

self.last_checker_signal = -returncode

1128

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

1062

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

1063

vars(self))

1129

1064

return False

1130

1065

1131

1066

def checked_ok(self):

1150

1085

def need_approval(self):

1151

1086

self.last_approval_request = datetime.datetime.utcnow()

1152

1087

1153

def start_checker(self, start_was_randomized=False):

1088

def start_checker(self):

1154

1089

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

1155

1090

1156

1091

If a checker already exists, leave it running and do

1165

1100

# should be.

1166

1101

1167

1102

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

1168

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

1103

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

1169

1104

self.checker.join()

1170

1105

self.checker = None

1171

1106

# Start a new checker if needed

1172

1107

if self.checker is None:

1173

1108

# Escape attributes for the shell

1174

1109

escaped_attrs = {

1175

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

1110

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

1176

1111

for attr in self.runtime_expansions}

1177

1112

try:

1178

1113

command = self.checker_command % escaped_attrs

1179

1114

except TypeError as error:

1180

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

1181

self.checker_command, exc_info=error)

1115

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

1116

self.checker_command,

1117

exc_info=error)

1182

1118

return True # Try again later

1183

1119

self.current_checker_command = command

1184

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

1120

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

1121

self.name)

1185

1122

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

1186

1123

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

1187

1124

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

1203

1140

kwargs=popen_args)

1204

1141

self.checker.start()

1205

1142

self.checker_callback_tag = GLib.io_add_watch(

1206

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

1207

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

1143

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

1208

1144

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

1145

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

1221

1146

return True

1222

1147

1227

1152

self.checker_callback_tag = None

1228

1153

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

1229

1154

return

1230

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

1155

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

1231

1156

self.checker.terminate()

1232

1157

self.checker = None

1233

1158

1260

1185

func._dbus_name = func.__name__

1261

1186

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

1262

1187

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

1263

func._dbus_get_args_options = {"byte_arrays": byte_arrays}

1188

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

1264

1189

return func

1265

1190

1266

1191

return decorator

1355

1280

1356

1281

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1357

1282

out_signature="s",

1358

path_keyword="object_path",

1359

connection_keyword="connection")

1283

path_keyword='object_path',

1284

connection_keyword='connection')

1360

1285

def Introspect(self, object_path, connection):

1361

1286

"""Overloading of standard D-Bus method.

1362

1287

1411

1336

document.unlink()

1412

1337

except (AttributeError, xml.dom.DOMException,

1413

1338

xml.parsers.expat.ExpatError) as error:

1414

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

1415

exc_info=error)

1339

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

1340

exc_info=error)

1416

1341

return xmlstring

1417

1342

1418

1343

1476

1401

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

1477

1402

"'ay' signature {!r}"

1478

1403

.format(prop._dbus_signature))

1479

value = dbus.ByteArray(bytes(value))

1404

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

1405

for byte in value))

1480

1406

prop(value)

1481

1407

1482

1408

@dbus.service.method(dbus.PROPERTIES_IFACE,

1515

1441

1516

1442

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1517

1443

out_signature="s",

1518

path_keyword="object_path",

1519

connection_keyword="connection")

1444

path_keyword='object_path',

1445

connection_keyword='connection')

1520

1446

def Introspect(self, object_path, connection):

1521

1447

"""Overloading of standard D-Bus method.

1522

1448

1578

1504

document.unlink()

1579

1505

except (AttributeError, xml.dom.DOMException,

1580

1506

xml.parsers.expat.ExpatError) as error:

1581

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

1582

exc_info=error)

1507

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

1508

exc_info=error)

1583

1509

return xmlstring

1584

1510

1585

1511

1617

1543

1618

1544

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1619

1545

out_signature="s",

1620

path_keyword="object_path",

1621

connection_keyword="connection")

1546

path_keyword='object_path',

1547

connection_keyword='connection')

1622

1548

def Introspect(self, object_path, connection):

1623

1549

"""Overloading of standard D-Bus method.

1624

1550

1649

1575

document.unlink()

1650

1576

except (AttributeError, xml.dom.DOMException,

1651

1577

xml.parsers.expat.ExpatError) as error:

1652

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

1653

exc_info=error)

1578

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

1579

exc_info=error)

1654

1580

return xmlstring

1655

1581

1656

1582

2287

2213

del _interface

2288

2214

2289

2215

2290

class ProxyClient:

2216

class ProxyClient(object):

2291

2217

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

2292

2218

self._pipe = child_pipe

2293

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

2219

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

2294

2220

if not self._pipe.recv():

2295

2221

raise KeyError(key_id or fpr)

2296

2222

2297

2223

def __getattribute__(self, name):

2298

if name == "_pipe":

2224

if name == '_pipe':

2299

2225

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

2300

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

2226

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

2301

2227

data = self._pipe.recv()

2302

if data[0] == "data":

2228

if data[0] == 'data':

2303

2229

return data[1]

2304

if data[0] == "function":

2230

if data[0] == 'function':

2305

2231

2306

2232

def func(*args, **kwargs):

2307

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

2233

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

2308

2234

return self._pipe.recv()[1]

2309

2235

2310

2236

return func

2311

2237

2312

2238

def __setattr__(self, name, value):

2313

if name == "_pipe":

2239

if name == '_pipe':

2314

2240

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

2315

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

2241

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

2316

2242

2317

2243

2318

2244

class ClientHandler(socketserver.BaseRequestHandler, object):

2323

2249

2324

2250

def handle(self):

2325

2251

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())

2252

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

2253

str(self.client_address))

2254

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

2255

self.server.child_pipe.fileno())

2329

2256

2330

2257

session = gnutls.ClientSession(self.request)

2331

2258

2332

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

2259

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

2333

2260

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

2334

2261

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

2335

2262

# "+DHE-DSS"))

2337

2264

priority = self.server.gnutls_priority

2338

2265

if priority is None:

2339

2266

priority = "NORMAL"

2340

gnutls.priority_set_direct(session,

2341

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

2267

gnutls.priority_set_direct(session._c_object,

2268

priority.encode("utf-8"),

2269

None)

2342

2270

2343

2271

# Start communication using the Mandos protocol

2344

2272

# Get protocol number

2345

2273

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

2346

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

2274

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

2347

2275

try:

2348

2276

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

2349

2277

raise RuntimeError(line)

2350

2278

except (ValueError, IndexError, RuntimeError) as error:

2351

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

2279

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

2352

2280

return

2353

2281

2354

2282

# Start GnuTLS connection

2355

2283

try:

2356

2284

session.handshake()

2357

2285

except gnutls.Error as error:

2358

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

2286

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

2359

2287

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

2360

2288

# established. Just abandon the request.

2361

2289

return

2362

log.debug("Handshake succeeded")

2290

logger.debug("Handshake succeeded")

2363

2291

2364

2292

approval_required = False

2365

2293

try:

2369

2297

key_id = self.key_id(

2370

2298

self.peer_certificate(session))

2371

2299

except (TypeError, gnutls.Error) as error:

2372

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

2300

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

2373

2301

return

2374

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

2375

key_id.decode("utf-8",

2376

errors="replace"))

2302

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

2377

2303

2378

2304

else:

2379

2305

key_id = b""

2381

2307

fpr = self.fingerprint(

2382

2308

self.peer_certificate(session))

2383

2309

except (TypeError, gnutls.Error) as error:

2384

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

2310

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

2385

2311

return

2386

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

2312

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

2387

2313

2388

2314

try:

2389

2315

client = ProxyClient(child_pipe, key_id, fpr,

2398

2324

2399

2325

while True:

2400

2326

if not client.enabled:

2401

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

2327

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

2328

client.name)

2402

2329

if self.server.use_dbus:

2403

2330

# Emit D-Bus signal

2404

2331

client.Rejected("Disabled")

2408

2335

# We are approved or approval is disabled

2409

2336

break

2410

2337

elif client.approved is None:

2411

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

2412

client.name)

2338

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

2339

client.name)

2413

2340

if self.server.use_dbus:

2414

2341

# Emit D-Bus signal

2415

2342

client.NeedApproval(

2416

2343

client.approval_delay.total_seconds()

2417

2344

* 1000, client.approved_by_default)

2418

2345

else:

2419

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

2420

client.name)

2346

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

2347

client.name)

2421

2348

if self.server.use_dbus:

2422

2349

# Emit D-Bus signal

2423

2350

client.Rejected("Denied")

2431

2358

time2 = datetime.datetime.now()

2432

2359

if (time2 - time) >= delay:

2433

2360

if not client.approved_by_default:

2434

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

2435

" waiting for approval",

2436

client.name)

2361

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

2362

" waiting for approval",

2363

client.name)

2437

2364

if self.server.use_dbus:

2438

2365

# Emit D-Bus signal

2439

2366

client.Rejected("Approval timed out")

2446

2373

try:

2447

2374

session.send(client.secret)

2448

2375

except gnutls.Error as error:

2449

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

2376

logger.warning("gnutls send failed",

2377

exc_info=error)

2450

2378

return

2451

2379

2452

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

2380

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

2453

2381

# bump the timeout using extended_timeout

2454

2382

client.bump_timeout(client.extended_timeout)

2455

2383

if self.server.use_dbus:

2462

2390

try:

2463

2391

session.bye()

2464

2392

except gnutls.Error as error:

2465

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

2393

logger.warning("GnuTLS bye failed",

2394

exc_info=error)

2466

2395

2467

2396

@staticmethod

2468

2397

def peer_certificate(session):

2469

2398

"Return the peer's certificate as a bytestring"

2470

2399

try:

2471

cert_type = gnutls.certificate_type_get2(

2472

session, gnutls.CTYPE_PEERS)

2400

cert_type = gnutls.certificate_type_get2(session._c_object,

2401

gnutls.CTYPE_PEERS)

2473

2402

except AttributeError:

2474

cert_type = gnutls.certificate_type_get(session)

2403

cert_type = gnutls.certificate_type_get(session._c_object)

2475

2404

if gnutls.has_rawpk:

2476

2405

valid_cert_types = frozenset((gnutls.CRT_RAWPK,))

2477

2406

else:

2478

2407

valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))

2479

2408

# If not a valid certificate type...

2480

2409

if cert_type not in valid_cert_types:

2481

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

2482

valid_cert_types)

2410

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

2411

valid_cert_types)

2483

2412

# ...return invalid data

2484

2413

return b""

2485

2414

list_size = ctypes.c_uint(1)

2486

2415

cert_list = (gnutls.certificate_get_peers

2487

(session, ctypes.byref(list_size)))

2416

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

2488

2417

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

2489

2418

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

2490

2419

if list_size.value == 0:

2512

2441

buf = ctypes.create_string_buffer(32)

2513

2442

buf_len = ctypes.c_size_t(len(buf))

2514

2443

# 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))

2444

gnutls.pubkey_get_key_id(pubkey,

2445

gnutls.KEYID_USE_SHA256,

2446

ctypes.cast(ctypes.byref(buf),

2447

ctypes.POINTER(ctypes.c_ubyte)),

2448

ctypes.byref(buf_len))

2521

2449

# Deinit the certificate

2522

2450

gnutls.pubkey_deinit(pubkey)

2523

2451

2564

2492

return hex_fpr

2565

2493

2566

2494

2567

class MultiprocessingMixIn:

2495

class MultiprocessingMixIn(object):

2568

2496

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

2569

2497

2570

2498

def sub_process_main(self, request, address):

2582

2510

return proc

2583

2511

2584

2512

2585

class MultiprocessingMixInWithPipe(MultiprocessingMixIn):

2513

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2586

2514

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

2587

2515

2588

2516

def process_request(self, request, client_address):

2603

2531

2604

2532

2605

2533

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2606

socketserver.TCPServer):

2607

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

2534

socketserver.TCPServer, object):

2535

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

2608

2536

2609

2537

Attributes:

2610

2538

enabled: Boolean; whether this server is activated yet

2661

2589

if SO_BINDTODEVICE is None:

2662

2590

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

2663

2591

# common enough.

2664

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

2592

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

2665

2593

SO_BINDTODEVICE = 25

2666

2594

try:

2667

2595

self.socket.setsockopt(

2669

2597

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

2670

2598

except socket.error as error:

2671

2599

if error.errno == errno.EPERM:

2672

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

2673

self.interface)

2600

logger.error("No permission to bind to"

2601

" interface %s", self.interface)

2674

2602

elif error.errno == errno.ENOPROTOOPT:

2675

log.error("SO_BINDTODEVICE not available; cannot"

2676

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

2603

logger.error("SO_BINDTODEVICE not available;"

2604

" cannot bind to interface %s",

2605

self.interface)

2677

2606

elif error.errno == errno.ENODEV:

2678

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

2679

" bind", self.interface)

2607

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

2608

" cannot bind", self.interface)

2680

2609

else:

2681

2610

raise

2682

2611

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

2741

2670

def add_pipe(self, parent_pipe, proc):

2742

2671

# Call "handle_ipc" for both data and EOF events

2743

2672

GLib.io_add_watch(

2744

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

2745

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

2673

parent_pipe.fileno(),

2674

GLib.IO_IN | GLib.IO_HUP,

2746

2675

functools.partial(self.handle_ipc,

2747

2676

parent_pipe=parent_pipe,

2748

2677

proc=proc))

2761

2690

request = parent_pipe.recv()

2762

2691

command = request[0]

2763

2692

2764

if command == "init":

2693

if command == 'init':

2765

2694

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

2766

2695

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

2767

2696

address = request[3]

2768

2697

2769

2698

for c in self.clients.values():

2770

if key_id == ("E3B0C44298FC1C149AFBF4C8996FB924"

2771

"27AE41E4649B934CA495991B7852B855"):

2699

if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":

2772

2700

continue

2773

2701

if key_id and c.key_id == key_id:

2774

2702

client = c

2777

2705

client = c

2778

2706

break

2779

2707

else:

2780

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

2781

" %s", key_id or fpr, address)

2708

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

2709

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

2782

2710

if self.use_dbus:

2783

2711

# Emit D-Bus signal

2784

2712

mandos_dbus_service.ClientNotFound(key_id or fpr,

2787

2715

return False

2788

2716

2789

2717

GLib.io_add_watch(

2790

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

2791

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

2718

parent_pipe.fileno(),

2719

GLib.IO_IN | GLib.IO_HUP,

2792

2720

functools.partial(self.handle_ipc,

2793

2721

parent_pipe=parent_pipe,

2794

2722

proc=proc,

2797

2725

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

2798

2726

# same fileno

2799

2727

return False

2800

if command == "funcall":

2728

if command == 'funcall':

2801

2729

funcname = request[1]

2802

2730

args = request[2]

2803

2731

kwargs = request[3]

2804

2732

2805

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

2733

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

2806

2734

funcname)(*args,

2807

2735

**kwargs)))

2808

2736

2809

if command == "getattr":

2737

if command == 'getattr':

2810

2738

attrname = request[1]

2811

2739

if isinstance(client_object.__getattribute__(attrname),

2812

collections.abc.Callable):

2813

parent_pipe.send(("function", ))

2740

collections.Callable):

2741

parent_pipe.send(('function', ))

2814

2742

else:

2815

2743

parent_pipe.send((

2816

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

2744

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

2817

2745

2818

if command == "setattr":

2746

if command == 'setattr':

2819

2747

attrname = request[1]

2820

2748

value = request[2]

2821

2749

setattr(client_object, attrname, value)

2826

2754

def rfc3339_duration_to_delta(duration):

2827

2755

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

2828

2756

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

2757

>>> rfc3339_duration_to_delta("P7D")

2758

datetime.timedelta(7)

2759

>>> rfc3339_duration_to_delta("PT60S")

2760

datetime.timedelta(0, 60)

2761

>>> rfc3339_duration_to_delta("PT60M")

2762

datetime.timedelta(0, 3600)

2763

>>> rfc3339_duration_to_delta("PT24H")

2764

datetime.timedelta(1)

2765

>>> rfc3339_duration_to_delta("P1W")

2766

datetime.timedelta(7)

2767

>>> rfc3339_duration_to_delta("PT5M30S")

2768

datetime.timedelta(0, 330)

2769

>>> rfc3339_duration_to_delta("P1DT3M20S")

2770

datetime.timedelta(1, 200)

2845

2771

"""

2846

2772

2847

2773

# Parsing an RFC 3339 duration with regular expressions is not

2927

2853

def string_to_delta(interval):

2928

2854

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

2929

2855

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

2856

>>> string_to_delta('7d')

2857

datetime.timedelta(7)

2858

>>> string_to_delta('60s')

2859

datetime.timedelta(0, 60)

2860

>>> string_to_delta('60m')

2861

datetime.timedelta(0, 3600)

2862

>>> string_to_delta('24h')

2863

datetime.timedelta(1)

2864

>>> string_to_delta('1w')

2865

datetime.timedelta(7)

2866

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

2867

datetime.timedelta(0, 330)

2942

2868

"""

2943

2869

2944

2870

try:

3046

2972

3047

2973

options = parser.parse_args()

3048

2974

2975

if options.check:

2976

import doctest

2977

fail_count, test_count = doctest.testmod()

2978

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

2979

3049

2980

# Default values for config file for server-global settings

3050

2981

if gnutls.has_rawpk:

3051

2982

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

3147

3078

3148

3079

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

3149

3080

syslogger.setFormatter(

3150

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

3151

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

3081

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

3082

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

3152

3083

server_settings["servicename"])))

3153

3084

3154

3085

# Parse config file with clients

3178

3109

try:

3179

3110

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

3180

3111

except IOError as e:

3181

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

3182

exc_info=e)

3112

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

3113

exc_info=e)

3183

3114

3184

3115

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

3185

3116

("mandos", "mandos"),

3196

3127

try:

3197

3128

os.setgid(gid)

3198

3129

os.setuid(uid)

3199

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

3130

if debug:

3131

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

3132

gid))

3200

3133

except OSError as error:

3201

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

3202

os.strerror(error.errno))

3134

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

3135

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

3203

3136

if error.errno != errno.EPERM:

3204

3137

raise

3205

3138

3212

3145

3213

3146

@gnutls.log_func

3214

3147

def debug_gnutls(level, string):

3215

log.debug("GnuTLS: %s",

3216

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

3148

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

3217

3149

3218

3150

gnutls.global_set_log_function(debug_gnutls)

3219

3151

3248

3180

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

3249

3181

do_not_queue=True)

3250

3182

except dbus.exceptions.DBusException as e:

3251

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

3183

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

3252

3184

use_dbus = False

3253

3185

server_settings["use_dbus"] = False

3254

3186

tcp_server.use_dbus = False

3313

3245

if isinstance(s, bytes)

3314

3246

else s) for s in

3315

3247

value["client_structure"]]

3316

# .name, .host, and .checker_command

3317

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

3248

# .name & .host

3249

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

3318

3250

if isinstance(value[k], bytes):

3319

3251

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

3320

3252

if "key_id" not in value:

3330

3262

for key, value in

3331

3263

bytes_old_client_settings.items()}

3332

3264

del bytes_old_client_settings

3333

# .host and .checker_command

3265

# .host

3334

3266

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"))

3267

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

3268

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

3269

.decode("utf-8"))

3339

3270

os.remove(stored_state_path)

3340

3271

except IOError as e:

3341

3272

if e.errno == errno.ENOENT:

3342

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

3343

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

3273

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

3274

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

3344

3275

else:

3345

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

3346

exc_info=e)

3276

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

3277

exc_info=e)

3347

3278

raise

3348

3279

except EOFError as e:

3349

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

3350

exc_info=e)

3280

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

3281

"EOFError:",

3282

exc_info=e)

3351

3283

3352

3284

with PGPEngine() as pgp:

3353

3285

for client_name, client in clients_data.items():

3380

3312

if client["enabled"]:

3381

3313

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

3382

3314

if not client["last_checked_ok"]:

3383

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

3384

" never performed a successful"

3385

" checker", client_name)

3315

logger.warning(

3316

"disabling client {} - Client never "

3317

"performed a successful checker".format(

3318

client_name))

3386

3319

client["enabled"] = False

3387

3320

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"])

3321

logger.warning(

3322

"disabling client {} - Client last"

3323

" checker failed with error code"

3324

" {}".format(

3325

client_name,

3326

client["last_checker_status"]))

3392

3327

client["enabled"] = False

3393

3328

else:

3394

3329

client["expires"] = (

3395

3330

datetime.datetime.utcnow()

3396

3331

+ client["timeout"])

3397

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

3398

" enabled", client_name)

3332

logger.debug("Last checker succeeded,"

3333

" keeping {} enabled".format(

3334

client_name))

3399

3335

try:

3400

3336

client["secret"] = pgp.decrypt(

3401

3337

client["encrypted_secret"],

3402

3338

client_settings[client_name]["secret"])

3403

3339

except PGPError:

3404

3340

# If decryption fails, we use secret from new settings

3405

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

3406

client_name)

3341

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

3342

client_name))

3407

3343

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

3408

3344

["secret"])

3409

3345

3423

3359

server_settings=server_settings)

3424

3360

3425

3361

if not tcp_server.clients:

3426

log.warning("No clients defined")

3362

logger.warning("No clients defined")

3427

3363

3428

3364

if not foreground:

3429

3365

if pidfile is not None:

3432

3368

with pidfile:

3433

3369

print(pid, file=pidfile)

3434

3370

except IOError:

3435

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

3436

pidfilename, pid)

3371

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

3372

pidfilename, pid)

3437

3373

del pidfile

3438

3374

del pidfilename

3439

3375

3589

3525

3590

3526

try:

3591

3527

with tempfile.NamedTemporaryFile(

3592

mode="wb",

3528

mode='wb',

3593

3529

suffix=".pickle",

3594

prefix="clients-",

3530

prefix='clients-',

3595

3531

dir=os.path.dirname(stored_state_path),

3596

3532

delete=False) as stored_state:

3597

3533

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

3605

3541

except NameError:

3606

3542

pass

3607

3543

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

3608

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

3609

os.strerror(e.errno))

3544

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

3545

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

3610

3546

else:

3611

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

3612

exc_info=e)

3547

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

3548

exc_info=e)

3613

3549

raise

3614

3550

3615

3551

# Delete all clients, and settings from config

3632

3568

mandos_dbus_service.client_added_signal(client)

3633

3569

# Need to initiate checking of clients

3634

3570

if client.enabled:

3635

client.init_checker(randomize_start=True)

3571

client.init_checker()

3636

3572

3637

3573

tcp_server.enable()

3638

3574

tcp_server.server_activate()

3641

3577

if zeroconf:

3642

3578

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

3643

3579

if use_ipv6:

3644

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

3645

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

3580

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

3581

" flowinfo %d, scope_id %d",

3582

*tcp_server.socket.getsockname())

3646

3583

else: # IPv4

3647

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

3648

*tcp_server.socket.getsockname())

3584

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

3585

*tcp_server.socket.getsockname())

3649

3586

3650

3587

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

3651

3588

3655

3592

try:

3656

3593

service.activate()

3657

3594

except dbus.exceptions.DBusException as error:

3658

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

3595

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

3659

3596

cleanup()

3660

3597

sys.exit(1)

3661

3598

# End of Avahi example code

3662

3599

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))

3600

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

3601

lambda *args, **kwargs:

3602

(tcp_server.handle_request

3603

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

3668

3604

3669

log.debug("Starting main loop")

3605

logger.debug("Starting main loop")

3670

3606

main_loop.run()

3671

3607

except AvahiError as error:

3672

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

3608

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

3673

3609

cleanup()

3674

3610

sys.exit(1)

3675

3611

except KeyboardInterrupt:

3676

3612

if debug:

3677

3613

print("", file=sys.stderr)

3678

log.debug("Server received KeyboardInterrupt")

3679

log.debug("Server exiting")

3614

logger.debug("Server received KeyboardInterrupt")

3615

logger.debug("Server exiting")

3680

3616

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

3681

3617

cleanup()

3682

3618

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:

3619

3620

if __name__ == '__main__':

3621

main()