/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

961

904

# key_id() and fingerprint() functions

962

905

client["key_id"] = (section.get("key_id", "").upper()

963

906

.replace(" ", ""))

964

client["fingerprint"] = (section.get("fingerprint",

965

"").upper()

907

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

966

908

.replace(" ", ""))

967

if not (client["key_id"] or client["fingerprint"]):

968

log.error("Skipping client %s without key_id or"

969

" fingerprint", client_name)

970

del settings[client_name]

971

continue

972

909

if "secret" in section:

973

910

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

974

911

.encode("utf-8"),

1015

952

self.last_enabled = None

1016

953

self.expires = None

1017

954

1018

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

1019

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

1020

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)

1021

958

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

1022

959

datetime.datetime.utcnow())

1023

960

1051

988

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

1052

989

# Already enabled

1053

990

return

991

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

1054

992

self.enabled = True

1055

993

self.last_enabled = datetime.datetime.utcnow()

1056

994

self.init_checker()

1061

999

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

1062

1000

return False

1063

1001

if not quiet:

1064

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

1002

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

1065

1003

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

1066

1004

GLib.source_remove(self.disable_initiator_tag)

1067

1005

self.disable_initiator_tag = None

1079

1017

def __del__(self):

1080

1018

self.disable()

1081

1019

1082

def init_checker(self, randomize_start=False):

1083

# Schedule a new checker to be started a randomly selected

1084

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

1085

# the startup of checkers over time when the server is

1086

# 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.

1087

1023

if self.checker_initiator_tag is not None:

1088

1024

GLib.source_remove(self.checker_initiator_tag)

1089

interval_milliseconds = int(self.interval.total_seconds()

1090

* 1000)

1091

if randomize_start:

1092

delay_milliseconds = random.randrange(

1093

interval_milliseconds + 1)

1094

else:

1095

delay_milliseconds = interval_milliseconds

1096

1025

self.checker_initiator_tag = GLib.timeout_add(

1097

delay_milliseconds, self.start_checker, randomize_start)

1098

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

1099

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

1100

# expire at the soonest one interval after a checker was

1101

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

1102

# time might have to be extended.

1103

now = datetime.datetime.utcnow()

1104

self.expires = now + delay + self.interval

1105

# 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

1106

1029

if self.disable_initiator_tag is not None:

1107

1030

GLib.source_remove(self.disable_initiator_tag)

1108

1031

self.disable_initiator_tag = GLib.timeout_add(

1109

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

1110

self.disable)

1032

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

1033

# Also start a new checker *right now*.

1034

self.start_checker()

1111

1035

1112

1036

def checker_callback(self, source, condition, connection,

1113

1037

command):

1115

1039

# Read return code from connection (see call_pipe)

1116

1040

returncode = connection.recv()

1117

1041

connection.close()

1118

if self.checker is not None:

1119

self.checker.join()

1042

self.checker.join()

1120

1043

self.checker_callback_tag = None

1121

1044

self.checker = None

1122

1045

1124

1047

self.last_checker_status = returncode

1125

1048

self.last_checker_signal = None

1126

1049

if self.last_checker_status == 0:

1127

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

1050

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

1051

vars(self))

1128

1052

self.checked_ok()

1129

1053

else:

1130

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

1054

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

1131

1055

else:

1132

1056

self.last_checker_status = -1

1133

1057

self.last_checker_signal = -returncode

1134

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

1058

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

1059

vars(self))

1135

1060

return False

1136

1061

1137

1062

def checked_ok(self):

1156

1081

def need_approval(self):

1157

1082

self.last_approval_request = datetime.datetime.utcnow()

1158

1083

1159

def start_checker(self, start_was_randomized=False):

1084

def start_checker(self):

1160

1085

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

1161

1086

1162

1087

If a checker already exists, leave it running and do

1171

1096

# should be.

1172

1097

1173

1098

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

1174

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

1099

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

1175

1100

self.checker.join()

1176

1101

self.checker = None

1177

1102

# Start a new checker if needed

1178

1103

if self.checker is None:

1179

1104

# Escape attributes for the shell

1180

1105

escaped_attrs = {

1181

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

1106

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

1182

1107

for attr in self.runtime_expansions}

1183

1108

try:

1184

1109

command = self.checker_command % escaped_attrs

1185

1110

except TypeError as error:

1186

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

1187

self.checker_command, exc_info=error)

1111

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

1112

self.checker_command,

1113

exc_info=error)

1188

1114

return True # Try again later

1189

1115

self.current_checker_command = command

1190

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

1116

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

1117

self.name)

1191

1118

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

1192

1119

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

1193

1120

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

1209

1136

kwargs=popen_args)

1210

1137

self.checker.start()

1211

1138

self.checker_callback_tag = GLib.io_add_watch(

1212

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

1213

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

1139

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

1214

1140

self.checker_callback, pipe[0], command)

1215

if start_was_randomized:

1216

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

1217

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

1218

# interval from then on.

1219

now = datetime.datetime.utcnow()

1220

self.checker_initiator_tag = GLib.timeout_add(

1221

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

1222

self.start_checker)

1223

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

1224

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

1225

return False

1226

1141

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

1227

1142

return True

1228

1143

1233

1148

self.checker_callback_tag = None

1234

1149

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

1235

1150

return

1236

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

1151

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

1237

1152

self.checker.terminate()

1238

1153

self.checker = None

1239

1154

1266

1181

func._dbus_name = func.__name__

1267

1182

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

1268

1183

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

1269

func._dbus_get_args_options = {"byte_arrays": byte_arrays}

1184

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

1270

1185

return func

1271

1186

1272

1187

return decorator

1361

1276

1362

1277

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1363

1278

out_signature="s",

1364

path_keyword="object_path",

1365

connection_keyword="connection")

1279

path_keyword='object_path',

1280

connection_keyword='connection')

1366

1281

def Introspect(self, object_path, connection):

1367

1282

"""Overloading of standard D-Bus method.

1368

1283

1417

1332

document.unlink()

1418

1333

except (AttributeError, xml.dom.DOMException,

1419

1334

xml.parsers.expat.ExpatError) as error:

1420

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

1421

exc_info=error)

1335

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

1336

exc_info=error)

1422

1337

return xmlstring

1423

1338

1424

1339

1482

1397

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

1483

1398

"'ay' signature {!r}"

1484

1399

.format(prop._dbus_signature))

1485

value = dbus.ByteArray(bytes(value))

1400

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

1401

for byte in value))

1486

1402

prop(value)

1487

1403

1488

1404

@dbus.service.method(dbus.PROPERTIES_IFACE,

1521

1437

1522

1438

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1523

1439

out_signature="s",

1524

path_keyword="object_path",

1525

connection_keyword="connection")

1440

path_keyword='object_path',

1441

connection_keyword='connection')

1526

1442

def Introspect(self, object_path, connection):

1527

1443

"""Overloading of standard D-Bus method.

1528

1444

1584

1500

document.unlink()

1585

1501

except (AttributeError, xml.dom.DOMException,

1586

1502

xml.parsers.expat.ExpatError) as error:

1587

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

1588

exc_info=error)

1503

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

1504

exc_info=error)

1589

1505

return xmlstring

1590

1506

1591

1507

1623

1539

1624

1540

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1625

1541

out_signature="s",

1626

path_keyword="object_path",

1627

connection_keyword="connection")

1542

path_keyword='object_path',

1543

connection_keyword='connection')

1628

1544

def Introspect(self, object_path, connection):

1629

1545

"""Overloading of standard D-Bus method.

1630

1546

1655

1571

document.unlink()

1656

1572

except (AttributeError, xml.dom.DOMException,

1657

1573

xml.parsers.expat.ExpatError) as error:

1658

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

1659

exc_info=error)

1574

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

1575

exc_info=error)

1660

1576

return xmlstring

1661

1577

1662

1578

2293

2209

del _interface

2294

2210

2295

2211

2296

class ProxyClient:

2212

class ProxyClient(object):

2297

2213

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

2298

2214

self._pipe = child_pipe

2299

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

2215

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

2300

2216

if not self._pipe.recv():

2301

2217

raise KeyError(key_id or fpr)

2302

2218

2303

2219

def __getattribute__(self, name):

2304

if name == "_pipe":

2220

if name == '_pipe':

2305

2221

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

2306

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

2222

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

2307

2223

data = self._pipe.recv()

2308

if data[0] == "data":

2224

if data[0] == 'data':

2309

2225

return data[1]

2310

if data[0] == "function":

2226

if data[0] == 'function':

2311

2227

2312

2228

def func(*args, **kwargs):

2313

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

2229

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

2314

2230

return self._pipe.recv()[1]

2315

2231

2316

2232

return func

2317

2233

2318

2234

def __setattr__(self, name, value):

2319

if name == "_pipe":

2235

if name == '_pipe':

2320

2236

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

2321

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

2237

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

2322

2238

2323

2239

2324

2240

class ClientHandler(socketserver.BaseRequestHandler, object):

2329

2245

2330

2246

def handle(self):

2331

2247

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

2332

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

2333

str(self.client_address))

2334

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())

2335

2252

2336

2253

session = gnutls.ClientSession(self.request)

2337

2254

2338

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

2255

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

2339

2256

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

2340

2257

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

2341

2258

# "+DHE-DSS"))

2343

2260

priority = self.server.gnutls_priority

2344

2261

if priority is None:

2345

2262

priority = "NORMAL"

2346

gnutls.priority_set_direct(session,

2347

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

2263

gnutls.priority_set_direct(session._c_object,

2264

priority.encode("utf-8"),

2265

None)

2348

2266

2349

2267

# Start communication using the Mandos protocol

2350

2268

# Get protocol number

2351

2269

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

2352

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

2270

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

2353

2271

try:

2354

2272

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

2355

2273

raise RuntimeError(line)

2356

2274

except (ValueError, IndexError, RuntimeError) as error:

2357

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

2275

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

2358

2276

return

2359

2277

2360

2278

# Start GnuTLS connection

2361

2279

try:

2362

2280

session.handshake()

2363

2281

except gnutls.Error as error:

2364

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

2282

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

2365

2283

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

2366

2284

# established. Just abandon the request.

2367

2285

return

2368

log.debug("Handshake succeeded")

2286

logger.debug("Handshake succeeded")

2369

2287

2370

2288

approval_required = False

2371

2289

try:

2375

2293

key_id = self.key_id(

2376

2294

self.peer_certificate(session))

2377

2295

except (TypeError, gnutls.Error) as error:

2378

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

2296

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

2379

2297

return

2380

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

2381

key_id.decode("utf-8",

2382

errors="replace"))

2298

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

2383

2299

2384

2300

else:

2385

2301

key_id = b""

2387

2303

fpr = self.fingerprint(

2388

2304

self.peer_certificate(session))

2389

2305

except (TypeError, gnutls.Error) as error:

2390

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

2306

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

2391

2307

return

2392

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

2308

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

2393

2309

2394

2310

try:

2395

2311

client = ProxyClient(child_pipe, key_id, fpr,

2404

2320

2405

2321

while True:

2406

2322

if not client.enabled:

2407

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

2323

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

2324

client.name)

2408

2325

if self.server.use_dbus:

2409

2326

# Emit D-Bus signal

2410

2327

client.Rejected("Disabled")

2414

2331

# We are approved or approval is disabled

2415

2332

break

2416

2333

elif client.approved is None:

2417

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

2418

client.name)

2334

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

2335

client.name)

2419

2336

if self.server.use_dbus:

2420

2337

# Emit D-Bus signal

2421

2338

client.NeedApproval(

2422

2339

client.approval_delay.total_seconds()

2423

2340

* 1000, client.approved_by_default)

2424

2341

else:

2425

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

2426

client.name)

2342

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

2343

client.name)

2427

2344

if self.server.use_dbus:

2428

2345

# Emit D-Bus signal

2429

2346

client.Rejected("Denied")

2437

2354

time2 = datetime.datetime.now()

2438

2355

if (time2 - time) >= delay:

2439

2356

if not client.approved_by_default:

2440

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

2441

" waiting for approval",

2442

client.name)

2357

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

2358

" waiting for approval",

2359

client.name)

2443

2360

if self.server.use_dbus:

2444

2361

# Emit D-Bus signal

2445

2362

client.Rejected("Approval timed out")

2452

2369

try:

2453

2370

session.send(client.secret)

2454

2371

except gnutls.Error as error:

2455

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

2372

logger.warning("gnutls send failed",

2373

exc_info=error)

2456

2374

return

2457

2375

2458

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

2376

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

2459

2377

# bump the timeout using extended_timeout

2460

2378

client.bump_timeout(client.extended_timeout)

2461

2379

if self.server.use_dbus:

2468

2386

try:

2469

2387

session.bye()

2470

2388

except gnutls.Error as error:

2471

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

2389

logger.warning("GnuTLS bye failed",

2390

exc_info=error)

2472

2391

2473

2392

@staticmethod

2474

2393

def peer_certificate(session):

2475

2394

"Return the peer's certificate as a bytestring"

2476

2395

try:

2477

cert_type = gnutls.certificate_type_get2(

2478

session, gnutls.CTYPE_PEERS)

2396

cert_type = gnutls.certificate_type_get2(session._c_object,

2397

gnutls.CTYPE_PEERS)

2479

2398

except AttributeError:

2480

cert_type = gnutls.certificate_type_get(session)

2399

cert_type = gnutls.certificate_type_get(session._c_object)

2481

2400

if gnutls.has_rawpk:

2482

2401

valid_cert_types = frozenset((gnutls.CRT_RAWPK,))

2483

2402

else:

2484

2403

valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))

2485

2404

# If not a valid certificate type...

2486

2405

if cert_type not in valid_cert_types:

2487

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

2488

valid_cert_types)

2406

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

2407

valid_cert_types)

2489

2408

# ...return invalid data

2490

2409

return b""

2491

2410

list_size = ctypes.c_uint(1)

2492

2411

cert_list = (gnutls.certificate_get_peers

2493

(session, ctypes.byref(list_size)))

2412

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

2494

2413

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

2495

2414

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

2496

2415

if list_size.value == 0:

2518

2437

buf = ctypes.create_string_buffer(32)

2519

2438

buf_len = ctypes.c_size_t(len(buf))

2520

2439

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

2521

gnutls.pubkey_get_key_id(

2522

pubkey,

2523

gnutls.KEYID_USE_SHA256,

2524

ctypes.cast(ctypes.byref(buf),

2525

ctypes.POINTER(ctypes.c_ubyte)),

2526

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))

2527

2445

# Deinit the certificate

2528

2446

gnutls.pubkey_deinit(pubkey)

2529

2447

2570

2488

return hex_fpr

2571

2489

2572

2490

2573

class MultiprocessingMixIn:

2491

class MultiprocessingMixIn(object):

2574

2492

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

2575

2493

2576

2494

def sub_process_main(self, request, address):

2588

2506

return proc

2589

2507

2590

2508

2591

class MultiprocessingMixInWithPipe(MultiprocessingMixIn):

2509

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2592

2510

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

2593

2511

2594

2512

def process_request(self, request, client_address):

2609

2527

2610

2528

2611

2529

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2612

socketserver.TCPServer):

2613

"""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

2614

2532

2615

2533

Attributes:

2616

2534

enabled: Boolean; whether this server is activated yet

2667

2585

if SO_BINDTODEVICE is None:

2668

2586

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

2669

2587

# common enough.

2670

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

2588

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

2671

2589

SO_BINDTODEVICE = 25

2672

2590

try:

2673

2591

self.socket.setsockopt(

2675

2593

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

2676

2594

except socket.error as error:

2677

2595

if error.errno == errno.EPERM:

2678

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

2679

self.interface)

2596

logger.error("No permission to bind to"

2597

" interface %s", self.interface)

2680

2598

elif error.errno == errno.ENOPROTOOPT:

2681

log.error("SO_BINDTODEVICE not available; cannot"

2682

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

2599

logger.error("SO_BINDTODEVICE not available;"

2600

" cannot bind to interface %s",

2601

self.interface)

2683

2602

elif error.errno == errno.ENODEV:

2684

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

2685

" bind", self.interface)

2603

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

2604

" cannot bind", self.interface)

2686

2605

else:

2687

2606

raise

2688

2607

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

2747

2666

def add_pipe(self, parent_pipe, proc):

2748

2667

# Call "handle_ipc" for both data and EOF events

2749

2668

GLib.io_add_watch(

2750

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

2751

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

2669

parent_pipe.fileno(),

2670

GLib.IO_IN | GLib.IO_HUP,

2752

2671

functools.partial(self.handle_ipc,

2753

2672

parent_pipe=parent_pipe,

2754

2673

proc=proc))

2767

2686

request = parent_pipe.recv()

2768

2687

command = request[0]

2769

2688

2770

if command == "init":

2689

if command == 'init':

2771

2690

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

2772

2691

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

2773

2692

address = request[3]

2774

2693

2775

2694

for c in self.clients.values():

2776

if key_id == ("E3B0C44298FC1C149AFBF4C8996FB924"

2777

"27AE41E4649B934CA495991B7852B855"):

2695

if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":

2778

2696

continue

2779

2697

if key_id and c.key_id == key_id:

2780

2698

client = c

2783

2701

client = c

2784

2702

break

2785

2703

else:

2786

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

2787

" %s", key_id or fpr, address)

2704

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

2705

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

2788

2706

if self.use_dbus:

2789

2707

# Emit D-Bus signal

2790

2708

mandos_dbus_service.ClientNotFound(key_id or fpr,

2793

2711

return False

2794

2712

2795

2713

GLib.io_add_watch(

2796

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

2797

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

2714

parent_pipe.fileno(),

2715

GLib.IO_IN | GLib.IO_HUP,

2798

2716

functools.partial(self.handle_ipc,

2799

2717

parent_pipe=parent_pipe,

2800

2718

proc=proc,

2803

2721

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

2804

2722

# same fileno

2805

2723

return False

2806

if command == "funcall":

2724

if command == 'funcall':

2807

2725

funcname = request[1]

2808

2726

args = request[2]

2809

2727

kwargs = request[3]

2810

2728

2811

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

2729

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

2812

2730

funcname)(*args,

2813

2731

**kwargs)))

2814

2732

2815

if command == "getattr":

2733

if command == 'getattr':

2816

2734

attrname = request[1]

2817

2735

if isinstance(client_object.__getattribute__(attrname),

2818

collections.abc.Callable):

2819

parent_pipe.send(("function", ))

2736

collections.Callable):

2737

parent_pipe.send(('function', ))

2820

2738

else:

2821

2739

parent_pipe.send((

2822

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

2740

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

2823

2741

2824

if command == "setattr":

2742

if command == 'setattr':

2825

2743

attrname = request[1]

2826

2744

value = request[2]

2827

2745

setattr(client_object, attrname, value)

2832

2750

def rfc3339_duration_to_delta(duration):

2833

2751

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

2834

2752

2835

>>> timedelta = datetime.timedelta

2836

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

2837

True

2838

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

2839

True

2840

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

2841

True

2842

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

2843

True

2844

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

2845

True

2846

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

2847

True

2848

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

2849

True

2850

>>> 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)

2851

2767

"""

2852

2768

2853

2769

# Parsing an RFC 3339 duration with regular expressions is not

2933

2849

def string_to_delta(interval):

2934

2850

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

2935

2851

2936

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

2937

True

2938

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

2939

True

2940

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

2941

True

2942

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

2943

True

2944

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

2945

True

2946

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

2947

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)

2948

2864

"""

2949

2865

2950

2866

try:

3052

2968

3053

2969

options = parser.parse_args()

3054

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

3055

2976

# Default values for config file for server-global settings

3056

2977

if gnutls.has_rawpk:

3057

2978

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

3077

2998

del priority

3078

2999

3079

3000

# Parse config file for server-global settings

3080

server_config = configparser.ConfigParser(server_defaults)

3001

server_config = configparser.SafeConfigParser(server_defaults)

3081

3002

del server_defaults

3082

3003

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

3083

# Convert the ConfigParser object to a dict

3004

# Convert the SafeConfigParser object to a dict

3084

3005

server_settings = server_config.defaults()

3085

3006

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

3086

3007

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

3153

3074

3154

3075

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

3155

3076

syslogger.setFormatter(

3156

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

3157

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

3077

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

3078

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

3158

3079

server_settings["servicename"])))

3159

3080

3160

3081

# Parse config file with clients

3161

client_config = configparser.ConfigParser(Client.client_defaults)

3082

client_config = configparser.SafeConfigParser(Client

3083

.client_defaults)

3162

3084

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

3163

3085

"clients.conf"))

3164

3086

3184

3106

try:

3185

3107

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

3186

3108

except IOError as e:

3187

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

3188

exc_info=e)

3109

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

3110

exc_info=e)

3189

3111

3190

3112

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

3191

3113

("mandos", "mandos"),

3202

3124

try:

3203

3125

os.setgid(gid)

3204

3126

os.setuid(uid)

3205

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

3127

if debug:

3128

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

3129

gid))

3206

3130

except OSError as error:

3207

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

3208

os.strerror(error.errno))

3131

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

3132

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

3209

3133

if error.errno != errno.EPERM:

3210

3134

raise

3211

3135

3218

3142

3219

3143

@gnutls.log_func

3220

3144

def debug_gnutls(level, string):

3221

log.debug("GnuTLS: %s",

3222

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

3145

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

3223

3146

3224

3147

gnutls.global_set_log_function(debug_gnutls)

3225

3148

3234

3157

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

3235

3158

daemon()

3236

3159

3237

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

3238

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

3239

# need to inform GLib that threads will be used.

3240

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()

3241

3163

3242

3164

global main_loop

3243

3165

# From the Avahi example code

3254

3176

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

3255

3177

do_not_queue=True)

3256

3178

except dbus.exceptions.DBusException as e:

3257

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

3179

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

3258

3180

use_dbus = False

3259

3181

server_settings["use_dbus"] = False

3260

3182

tcp_server.use_dbus = False

3319

3241

if isinstance(s, bytes)

3320

3242

else s) for s in

3321

3243

value["client_structure"]]

3322

# .name, .host, and .checker_command

3323

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

3244

# .name & .host

3245

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

3324

3246

if isinstance(value[k], bytes):

3325

3247

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

3326

3248

if "key_id" not in value:

3336

3258

for key, value in

3337

3259

bytes_old_client_settings.items()}

3338

3260

del bytes_old_client_settings

3339

# .host and .checker_command

3261

# .host

3340

3262

for value in old_client_settings.values():

3341

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

3342

if isinstance(value[attribute], bytes):

3343

value[attribute] = (value[attribute]

3344

.decode("utf-8"))

3263

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

3264

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

3265

.decode("utf-8"))

3345

3266

os.remove(stored_state_path)

3346

3267

except IOError as e:

3347

3268

if e.errno == errno.ENOENT:

3348

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

3349

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

3269

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

3270

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

3350

3271

else:

3351

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

3352

exc_info=e)

3272

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

3273

exc_info=e)

3353

3274

raise

3354

3275

except EOFError as e:

3355

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

3356

exc_info=e)

3276

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

3277

"EOFError:",

3278

exc_info=e)

3357

3279

3358

3280

with PGPEngine() as pgp:

3359

3281

for client_name, client in clients_data.items():

3386

3308

if client["enabled"]:

3387

3309

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

3388

3310

if not client["last_checked_ok"]:

3389

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

3390

" never performed a successful"

3391

" checker", client_name)

3311

logger.warning(

3312

"disabling client {} - Client never "

3313

"performed a successful checker".format(

3314

client_name))

3392

3315

client["enabled"] = False

3393

3316

elif client["last_checker_status"] != 0:

3394

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

3395

" last checker failed with error"

3396

" code %s", client_name,

3397

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"]))

3398

3323

client["enabled"] = False

3399

3324

else:

3400

3325

client["expires"] = (

3401

3326

datetime.datetime.utcnow()

3402

3327

+ client["timeout"])

3403

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

3404

" enabled", client_name)

3328

logger.debug("Last checker succeeded,"

3329

" keeping {} enabled".format(

3330

client_name))

3405

3331

try:

3406

3332

client["secret"] = pgp.decrypt(

3407

3333

client["encrypted_secret"],

3408

3334

client_settings[client_name]["secret"])

3409

3335

except PGPError:

3410

3336

# If decryption fails, we use secret from new settings

3411

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

3412

client_name)

3337

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

3338

client_name))

3413

3339

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

3414

3340

["secret"])

3415

3341

3429

3355

server_settings=server_settings)

3430

3356

3431

3357

if not tcp_server.clients:

3432

log.warning("No clients defined")

3358

logger.warning("No clients defined")

3433

3359

3434

3360

if not foreground:

3435

3361

if pidfile is not None:

3438

3364

with pidfile:

3439

3365

print(pid, file=pidfile)

3440

3366

except IOError:

3441

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

3442

pidfilename, pid)

3367

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

3368

pidfilename, pid)

3443

3369

del pidfile

3444

3370

del pidfilename

3445

3371

3595

3521

3596

3522

try:

3597

3523

with tempfile.NamedTemporaryFile(

3598

mode="wb",

3524

mode='wb',

3599

3525

suffix=".pickle",

3600

prefix="clients-",

3526

prefix='clients-',

3601

3527

dir=os.path.dirname(stored_state_path),

3602

3528

delete=False) as stored_state:

3603

3529

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

3611

3537

except NameError:

3612

3538

pass

3613

3539

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

3614

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

3615

os.strerror(e.errno))

3540

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

3541

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

3616

3542

else:

3617

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

3618

exc_info=e)

3543

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

3544

exc_info=e)

3619

3545

raise

3620

3546

3621

3547

# Delete all clients, and settings from config

3638

3564

mandos_dbus_service.client_added_signal(client)

3639

3565

# Need to initiate checking of clients

3640

3566

if client.enabled:

3641

client.init_checker(randomize_start=True)

3567

client.init_checker()

3642

3568

3643

3569

tcp_server.enable()

3644

3570

tcp_server.server_activate()

3647

3573

if zeroconf:

3648

3574

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

3649

3575

if use_ipv6:

3650

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

3651

" 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())

3652

3579

else: # IPv4

3653

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

3654

*tcp_server.socket.getsockname())

3580

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

3581

*tcp_server.socket.getsockname())

3655

3582

3656

3583

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

3657

3584

3661

3588

try:

3662

3589

service.activate()

3663

3590

except dbus.exceptions.DBusException as error:

3664

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

3591

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

3665

3592

cleanup()

3666

3593

sys.exit(1)

3667

3594

# End of Avahi example code

3668

3595

3669

GLib.io_add_watch(

3670

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

3671

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

3672

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

3673

(*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))

3674

3600

3675

log.debug("Starting main loop")

3601

logger.debug("Starting main loop")

3676

3602

main_loop.run()

3677

3603

except AvahiError as error:

3678

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

3604

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

3679

3605

cleanup()

3680

3606

sys.exit(1)

3681

3607

except KeyboardInterrupt:

3682

3608

if debug:

3683

3609

print("", file=sys.stderr)

3684

log.debug("Server received KeyboardInterrupt")

3685

log.debug("Server exiting")

3610

logger.debug("Server received KeyboardInterrupt")

3611

logger.debug("Server exiting")

3686

3612

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

3687

3613

cleanup()

3688

3614

3689

3690

def parse_test_args():

3691

# type: () -> argparse.Namespace

3692

parser = argparse.ArgumentParser(add_help=False)

3693

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

3694

parser.add_argument("--prefix", )

3695

args, unknown_args = parser.parse_known_args()

3696

if args.check:

3697

# Remove test options from sys.argv

3698

sys.argv[1:] = unknown_args

3699

return args

3700

3701

# Add all tests from doctest strings

3702

def load_tests(loader, tests, none):

3703

import doctest

3704

tests.addTests(doctest.DocTestSuite())

3705

return tests

3706

3707

if __name__ == "__main__":

3708

options = parse_test_args()

3709

try:

3710

if options.check:

3711

extra_test_prefix = options.prefix

3712

if extra_test_prefix is not None:

3713

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

3714

.result.wasSuccessful()):

3715

sys.exit(1)

3716

class ExtraTestLoader(unittest.TestLoader):

3717

testMethodPrefix = extra_test_prefix

3718

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

3719

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

3720

else:

3721

unittest.main(argv=[""])

3722

else:

3723

main()

3724

finally:

3725

logging.shutdown()

3726

3727

# Local Variables:

3728

# run-tests:

3729

# (lambda (&optional extra)

3730

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

3731

# extra))

3732

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

3733

# (funcall remove-test-window)

3734

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

3735

# run-tests-in-test-buffer:

3736

# (lambda (dir &optional extra)

3737

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

3738

# (setq buffer-read-only nil

3739

# default-directory dir)

3740

# (erase-buffer)

3741

# (compilation-mode))

3742

# (let ((process-result

3743

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

3744

# (process-file-shell-command

3745

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

3746

# (and (numberp process-result)

3747

# (= process-result 0))))

3748

# get-command-line:

3749

# (lambda (&optional extra)

3750

# (let ((quoted-script

3751

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

3752

# (format

3753

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

3754

# quoted-script)))

3755

# get-script-name:

3756

# (lambda ()

3757

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

3758

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

3759

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

3760

# (buffer-file-name))))

3761

# remove-test-window:

3762

# (lambda ()

3763

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

3764

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

3765

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

3766

# (lambda ()

3767

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

3768

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

3769

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

3770

# (display-buffer-overriding-action

3771

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

3772

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

3773

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

3774

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

3775

# eval:

3776

# (progn

3777

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

3778

# (funcall run-tests t)))

3779

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

3780

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

3781

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

3782

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

3783

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

3784

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

3785

# End:

3615

3616

if __name__ == '__main__':

3617

main()