/mandos/trunk : revision 237.4.140

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#!/usr/bin/python

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

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#!/usr/bin/python3 -bI

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

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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.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 = "1.8.4"

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version = "1.8.16"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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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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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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logger.addHandler(syslogger)

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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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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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logger.addHandler(console)

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logger.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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log.addHandler(console)

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log.setLevel(level)

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class PGPError(Exception):

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pass

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class PGPEngine(object):

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class PGPEngine:

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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 == "gpg":

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

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

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class avahi:

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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(object):

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class AvahiService:

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

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self.name)

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

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

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return self.rename(remove=False)

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else:

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

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log.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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logger.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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log.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"""

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

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

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if state == avahi.ENTRY_GROUP_ESTABLISHED:

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logger.debug("Zeroconf service established.")

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log.debug("Zeroconf service established.")

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elif state == avahi.ENTRY_GROUP_COLLISION:

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

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

433

str(error))

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

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log.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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logger.error(bad_states[state])

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log.error(bad_states[state])

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else:

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

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log.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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logger.info("Local Zeroconf service name"

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" collision.")

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

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return self.rename(remove=False)

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else:

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

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log.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:

478

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

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

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else:

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

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

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509

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510

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"""

498

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

526

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

527

**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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531

return ret

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# Pretend that we have a GnuTLS module

506

class gnutls(object):

535

class gnutls:

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

508

537

509

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

533

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OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

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535

564

# Types

536

class session_int(ctypes.Structure):

565

class _session_int(ctypes.Structure):

537

566

_fields_ = []

538

session_t = ctypes.POINTER(session_int)

567

session_t = ctypes.POINTER(_session_int)

539

568

540

569

class certificate_credentials_st(ctypes.Structure):

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570

_fields_ = []

544

573

certificate_type_t = ctypes.c_int

545

574

546

575

class datum_t(ctypes.Structure):

547

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

548

('size', ctypes.c_uint)]

576

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

577

("size", ctypes.c_uint)]

549

578

550

class openpgp_crt_int(ctypes.Structure):

579

class _openpgp_crt_int(ctypes.Structure):

551

580

_fields_ = []

552

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

581

openpgp_crt_t = ctypes.POINTER(_openpgp_crt_int)

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582

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

554

583

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

555

584

credentials_type_t = ctypes.c_int

564

593

# gnutls.strerror()

565

594

self.code = code

566

595

if message is None and code is not None:

567

message = gnutls.strerror(code)

596

message = gnutls.strerror(code).decode(

597

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

568

598

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

569

599

message, *args)

570

600

571

601

class CertificateSecurityError(Error):

572

602

pass

573

603

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

574

629

# Classes

575

class Credentials(object):

630

class Credentials(With_from_param):

576

631

def __init__(self):

577

self._c_object = gnutls.certificate_credentials_t()

578

gnutls.certificate_allocate_credentials(

579

ctypes.byref(self._c_object))

632

self._as_parameter_ = gnutls.certificate_credentials_t()

633

gnutls.certificate_allocate_credentials(self)

580

634

self.type = gnutls.CRD_CERTIFICATE

581

635

582

636

def __del__(self):

583

gnutls.certificate_free_credentials(self._c_object)

637

gnutls.certificate_free_credentials(self)

584

638

585

class ClientSession(object):

639

class ClientSession(With_from_param):

586

640

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

587

self._c_object = gnutls.session_t()

641

self._as_parameter_ = gnutls.session_t()

588

642

gnutls_flags = gnutls.CLIENT

589

643

if gnutls.check_version(b"3.5.6"):

590

644

gnutls_flags |= gnutls.NO_TICKETS

591

645

if gnutls.has_rawpk:

592

646

gnutls_flags |= gnutls.ENABLE_RAWPK

593

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

647

gnutls.init(self, gnutls_flags)

594

648

del gnutls_flags

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)

649

gnutls.set_default_priority(self)

650

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

651

gnutls.handshake_set_private_extensions(self, True)

599

652

self.socket = socket

600

653

if credentials is None:

601

654

credentials = gnutls.Credentials()

602

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

603

ctypes.cast(credentials._c_object,

604

ctypes.c_void_p))

655

gnutls.credentials_set(self, credentials.type,

656

credentials)

605

657

self.credentials = credentials

606

658

607

659

def __del__(self):

608

gnutls.deinit(self._c_object)

660

gnutls.deinit(self)

609

661

610

662

def handshake(self):

611

return gnutls.handshake(self._c_object)

663

return gnutls.handshake(self)

612

664

613

665

def send(self, data):

614

666

data = bytes(data)

615

667

data_len = len(data)

616

668

while data_len > 0:

617

data_len -= gnutls.record_send(self._c_object,

618

data[-data_len:],

669

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

619

670

data_len)

620

671

621

672

def bye(self):

622

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

673

return gnutls.bye(self, gnutls.SHUT_RDWR)

623

674

624

675

# Error handling functions

625

676

def _error_code(result):

626

677

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

627

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

628

if result >= 0:

678

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

679

if result >= gnutls.E_SUCCESS:

629

680

return result

630

681

if result == gnutls.E_NO_CERTIFICATE_FOUND:

631

682

raise gnutls.CertificateSecurityError(code=result)

632

683

raise gnutls.Error(code=result)

633

684

634

def _retry_on_error(result, func, arguments):

685

def _retry_on_error(result, func, arguments,

686

_error_code=_error_code):

635

687

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

636

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

637

while result < 0:

688

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

689

while result < gnutls.E_SUCCESS:

638

690

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

639

691

return _error_code(result)

640

692

result = func(*arguments)

645

697

646

698

# Functions

647

699

priority_set_direct = _library.gnutls_priority_set_direct

648

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

700

priority_set_direct.argtypes = [ClientSession, ctypes.c_char_p,

649

701

ctypes.POINTER(ctypes.c_char_p)]

650

702

priority_set_direct.restype = _error_code

651

703

652

704

init = _library.gnutls_init

653

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

705

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

654

706

init.restype = _error_code

655

707

656

708

set_default_priority = _library.gnutls_set_default_priority

657

set_default_priority.argtypes = [session_t]

709

set_default_priority.argtypes = [ClientSession]

658

710

set_default_priority.restype = _error_code

659

711

660

712

record_send = _library.gnutls_record_send

661

record_send.argtypes = [session_t, ctypes.c_void_p,

713

record_send.argtypes = [ClientSession, ctypes.c_void_p,

662

714

ctypes.c_size_t]

663

715

record_send.restype = ctypes.c_ssize_t

664

716

record_send.errcheck = _retry_on_error

666

718

certificate_allocate_credentials = (

667

719

_library.gnutls_certificate_allocate_credentials)

668

720

certificate_allocate_credentials.argtypes = [

669

ctypes.POINTER(certificate_credentials_t)]

721

PointerTo(Credentials)]

670

722

certificate_allocate_credentials.restype = _error_code

671

723

672

724

certificate_free_credentials = (

673

725

_library.gnutls_certificate_free_credentials)

674

certificate_free_credentials.argtypes = [

675

certificate_credentials_t]

726

certificate_free_credentials.argtypes = [Credentials]

676

727

certificate_free_credentials.restype = None

677

728

678

729

handshake_set_private_extensions = (

679

730

_library.gnutls_handshake_set_private_extensions)

680

handshake_set_private_extensions.argtypes = [session_t,

731

handshake_set_private_extensions.argtypes = [ClientSession,

681

732

ctypes.c_int]

682

733

handshake_set_private_extensions.restype = None

683

734

684

735

credentials_set = _library.gnutls_credentials_set

685

credentials_set.argtypes = [session_t, credentials_type_t,

686

ctypes.c_void_p]

736

credentials_set.argtypes = [ClientSession, credentials_type_t,

737

CastToVoidPointer(Credentials)]

687

738

credentials_set.restype = _error_code

688

739

689

740

strerror = _library.gnutls_strerror

691

742

strerror.restype = ctypes.c_char_p

692

743

693

744

certificate_type_get = _library.gnutls_certificate_type_get

694

certificate_type_get.argtypes = [session_t]

745

certificate_type_get.argtypes = [ClientSession]

695

746

certificate_type_get.restype = _error_code

696

747

697

748

certificate_get_peers = _library.gnutls_certificate_get_peers

698

certificate_get_peers.argtypes = [session_t,

749

certificate_get_peers.argtypes = [ClientSession,

699

750

ctypes.POINTER(ctypes.c_uint)]

700

751

certificate_get_peers.restype = ctypes.POINTER(datum_t)

701

752

708

759

global_set_log_function.restype = None

709

760

710

761

deinit = _library.gnutls_deinit

711

deinit.argtypes = [session_t]

762

deinit.argtypes = [ClientSession]

712

763

deinit.restype = None

713

764

714

765

handshake = _library.gnutls_handshake

715

handshake.argtypes = [session_t]

716

handshake.restype = _error_code

766

handshake.argtypes = [ClientSession]

767

handshake.restype = ctypes.c_int

717

768

handshake.errcheck = _retry_on_error

718

769

719

770

transport_set_ptr = _library.gnutls_transport_set_ptr

720

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

771

transport_set_ptr.argtypes = [ClientSession, transport_ptr_t]

721

772

transport_set_ptr.restype = None

722

773

723

774

bye = _library.gnutls_bye

724

bye.argtypes = [session_t, close_request_t]

725

bye.restype = _error_code

775

bye.argtypes = [ClientSession, close_request_t]

776

bye.restype = ctypes.c_int

726

777

bye.errcheck = _retry_on_error

727

778

728

779

check_version = _library.gnutls_check_version

745

796

746

797

x509_crt_fmt_t = ctypes.c_int

747

798

748

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

799

# All the function declarations below are from

800

# gnutls/abstract.h

749

801

pubkey_init = _library.gnutls_pubkey_init

750

802

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

751

803

pubkey_init.restype = _error_code

765

817

pubkey_deinit.argtypes = [pubkey_t]

766

818

pubkey_deinit.restype = None

767

819

else:

768

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

820

# All the function declarations below are from

821

# gnutls/openpgp.h

769

822

770

823

openpgp_crt_init = _library.gnutls_openpgp_crt_init

771

824

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

777

830

openpgp_crt_fmt_t]

778

831

openpgp_crt_import.restype = _error_code

779

832

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)]

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

]

783

840

openpgp_crt_verify_self.restype = _error_code

784

841

785

842

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

796

853

797

854

if check_version(b"3.6.4"):

798

855

certificate_type_get2 = _library.gnutls_certificate_type_get2

799

certificate_type_get2.argtypes = [session_t, ctypes.c_int]

856

certificate_type_get2.argtypes = [ClientSession, ctypes.c_int]

800

857

certificate_type_get2.restype = _error_code

801

858

802

859

# Remove non-public functions

814

871

connection.close()

815

872

816

873

817

class Client(object):

874

class Client:

818

875

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

819

876

820

877

Attributes:

821

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

878

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

822

879

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

823

880

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

824

881

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

825

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

882

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

826

883

running.

827

884

checker_callback_tag: a GLib event source tag, or None

828

885

checker_command: string; External command which is run to check

952

1009

self.last_enabled = None

953

1010

self.expires = None

954

1011

955

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

956

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

957

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

1012

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

1013

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

1014

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

958

1015

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

959

1016

datetime.datetime.utcnow())

960

1017

988

1045

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

989

1046

# Already enabled

990

1047

return

991

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

992

1048

self.enabled = True

993

1049

self.last_enabled = datetime.datetime.utcnow()

994

1050

self.init_checker()

999

1055

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

1000

1056

return False

1001

1057

if not quiet:

1002

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

1058

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

1003

1059

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

1004

1060

GLib.source_remove(self.disable_initiator_tag)

1005

1061

self.disable_initiator_tag = None

1017

1073

def __del__(self):

1018

1074

self.disable()

1019

1075

1020

def init_checker(self):

1021

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

1022

# and every interval from then on.

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.

1023

1081

if self.checker_initiator_tag is not None:

1024

1082

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

1025

1090

self.checker_initiator_tag = GLib.timeout_add(

1026

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

1027

self.start_checker)

1028

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

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

1029

1100

if self.disable_initiator_tag is not None:

1030

1101

GLib.source_remove(self.disable_initiator_tag)

1031

1102

self.disable_initiator_tag = GLib.timeout_add(

1032

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

1033

# Also start a new checker *right now*.

1034

self.start_checker()

1103

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

1104

self.disable)

1035

1105

1036

1106

def checker_callback(self, source, condition, connection,

1037

1107

command):

1039

1109

# Read return code from connection (see call_pipe)

1040

1110

returncode = connection.recv()

1041

1111

connection.close()

1042

self.checker.join()

1112

if self.checker is not None:

1113

self.checker.join()

1043

1114

self.checker_callback_tag = None

1044

1115

self.checker = None

1045

1116

1047

1118

self.last_checker_status = returncode

1048

1119

self.last_checker_signal = None

1049

1120

if self.last_checker_status == 0:

1050

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

1051

vars(self))

1121

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

1052

1122

self.checked_ok()

1053

1123

else:

1054

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

1124

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

1055

1125

else:

1056

1126

self.last_checker_status = -1

1057

1127

self.last_checker_signal = -returncode

1058

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

1059

vars(self))

1128

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

1060

1129

return False

1061

1130

1062

1131

def checked_ok(self):

1081

1150

def need_approval(self):

1082

1151

self.last_approval_request = datetime.datetime.utcnow()

1083

1152

1084

def start_checker(self):

1153

def start_checker(self, start_was_randomized=False):

1085

1154

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

1086

1155

1087

1156

If a checker already exists, leave it running and do

1096

1165

# should be.

1097

1166

1098

1167

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

1099

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

1168

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

1100

1169

self.checker.join()

1101

1170

self.checker = None

1102

1171

# Start a new checker if needed

1103

1172

if self.checker is None:

1104

1173

# Escape attributes for the shell

1105

1174

escaped_attrs = {

1106

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

1175

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

1107

1176

for attr in self.runtime_expansions}

1108

1177

try:

1109

1178

command = self.checker_command % escaped_attrs

1110

1179

except TypeError as error:

1111

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

1112

self.checker_command,

1113

exc_info=error)

1180

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

1181

self.checker_command, exc_info=error)

1114

1182

return True # Try again later

1115

1183

self.current_checker_command = command

1116

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

1117

self.name)

1184

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

1118

1185

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

1119

1186

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

1120

1187

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

1136

1203

kwargs=popen_args)

1137

1204

self.checker.start()

1138

1205

self.checker_callback_tag = GLib.io_add_watch(

1139

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

1206

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

1207

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

1140

1208

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

1141

1220

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

1142

1221

return True

1143

1222

1148

1227

self.checker_callback_tag = None

1149

1228

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

1150

1229

return

1151

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

1230

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

1152

1231

self.checker.terminate()

1153

1232

self.checker = None

1154

1233

1181

1260

func._dbus_name = func.__name__

1182

1261

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

1183

1262

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

1184

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

1263

func._dbus_get_args_options = {"byte_arrays": byte_arrays}

1185

1264

return func

1186

1265

1187

1266

return decorator

1276

1355

1277

1356

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1278

1357

out_signature="s",

1279

path_keyword='object_path',

1280

connection_keyword='connection')

1358

path_keyword="object_path",

1359

connection_keyword="connection")

1281

1360

def Introspect(self, object_path, connection):

1282

1361

"""Overloading of standard D-Bus method.

1283

1362

1332

1411

document.unlink()

1333

1412

except (AttributeError, xml.dom.DOMException,

1334

1413

xml.parsers.expat.ExpatError) as error:

1335

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

1336

exc_info=error)

1414

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

1415

exc_info=error)

1337

1416

return xmlstring

1338

1417

1339

1418

1397

1476

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

1398

1477

"'ay' signature {!r}"

1399

1478

.format(prop._dbus_signature))

1400

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

1401

for byte in value))

1479

value = dbus.ByteArray(bytes(value))

1402

1480

prop(value)

1403

1481

1404

1482

@dbus.service.method(dbus.PROPERTIES_IFACE,

1437

1515

1438

1516

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1439

1517

out_signature="s",

1440

path_keyword='object_path',

1441

connection_keyword='connection')

1518

path_keyword="object_path",

1519

connection_keyword="connection")

1442

1520

def Introspect(self, object_path, connection):

1443

1521

"""Overloading of standard D-Bus method.

1444

1522

1500

1578

document.unlink()

1501

1579

except (AttributeError, xml.dom.DOMException,

1502

1580

xml.parsers.expat.ExpatError) as error:

1503

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

1504

exc_info=error)

1581

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

1582

exc_info=error)

1505

1583

return xmlstring

1506

1584

1507

1585

1539

1617

1540

1618

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1541

1619

out_signature="s",

1542

path_keyword='object_path',

1543

connection_keyword='connection')

1620

path_keyword="object_path",

1621

connection_keyword="connection")

1544

1622

def Introspect(self, object_path, connection):

1545

1623

"""Overloading of standard D-Bus method.

1546

1624

1571

1649

document.unlink()

1572

1650

except (AttributeError, xml.dom.DOMException,

1573

1651

xml.parsers.expat.ExpatError) as error:

1574

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

1575

exc_info=error)

1652

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

1653

exc_info=error)

1576

1654

return xmlstring

1577

1655

1578

1656

2209

2287

del _interface

2210

2288

2211

2289

2212

class ProxyClient(object):

2290

class ProxyClient:

2213

2291

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

2214

2292

self._pipe = child_pipe

2215

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

2293

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

2216

2294

if not self._pipe.recv():

2217

2295

raise KeyError(key_id or fpr)

2218

2296

2219

2297

def __getattribute__(self, name):

2220

if name == '_pipe':

2298

if name == "_pipe":

2221

2299

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

2222

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

2300

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

2223

2301

data = self._pipe.recv()

2224

if data[0] == 'data':

2302

if data[0] == "data":

2225

2303

return data[1]

2226

if data[0] == 'function':

2304

if data[0] == "function":

2227

2305

2228

2306

def func(*args, **kwargs):

2229

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

2307

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

2230

2308

return self._pipe.recv()[1]

2231

2309

2232

2310

return func

2233

2311

2234

2312

def __setattr__(self, name, value):

2235

if name == '_pipe':

2313

if name == "_pipe":

2236

2314

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

2237

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

2315

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

2238

2316

2239

2317

2240

2318

class ClientHandler(socketserver.BaseRequestHandler, object):

2245

2323

2246

2324

def handle(self):

2247

2325

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

2248

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

2249

str(self.client_address))

2250

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

2251

self.server.child_pipe.fileno())

2326

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

2327

str(self.client_address))

2328

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

2252

2329

2253

2330

session = gnutls.ClientSession(self.request)

2254

2331

2255

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

2332

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

2256

2333

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

2257

2334

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

2258

2335

# "+DHE-DSS"))

2260

2337

priority = self.server.gnutls_priority

2261

2338

if priority is None:

2262

2339

priority = "NORMAL"

2263

gnutls.priority_set_direct(session._c_object,

2264

priority.encode("utf-8"),

2265

None)

2340

gnutls.priority_set_direct(session,

2341

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

2266

2342

2267

2343

# Start communication using the Mandos protocol

2268

2344

# Get protocol number

2269

2345

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

2270

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

2346

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

2271

2347

try:

2272

2348

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

2273

2349

raise RuntimeError(line)

2274

2350

except (ValueError, IndexError, RuntimeError) as error:

2275

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

2351

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

2276

2352

return

2277

2353

2278

2354

# Start GnuTLS connection

2279

2355

try:

2280

2356

session.handshake()

2281

2357

except gnutls.Error as error:

2282

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

2358

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

2283

2359

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

2284

2360

# established. Just abandon the request.

2285

2361

return

2286

logger.debug("Handshake succeeded")

2362

log.debug("Handshake succeeded")

2287

2363

2288

2364

approval_required = False

2289

2365

try:

2293

2369

key_id = self.key_id(

2294

2370

self.peer_certificate(session))

2295

2371

except (TypeError, gnutls.Error) as error:

2296

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

2372

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

2297

2373

return

2298

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

2374

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

2375

key_id.decode("utf-8",

2376

errors="replace"))

2299

2377

2300

2378

else:

2301

2379

key_id = b""

2303

2381

fpr = self.fingerprint(

2304

2382

self.peer_certificate(session))

2305

2383

except (TypeError, gnutls.Error) as error:

2306

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

2384

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

2307

2385

return

2308

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

2386

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

2309

2387

2310

2388

try:

2311

2389

client = ProxyClient(child_pipe, key_id, fpr,

2320

2398

2321

2399

while True:

2322

2400

if not client.enabled:

2323

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

2324

client.name)

2401

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

2325

2402

if self.server.use_dbus:

2326

2403

# Emit D-Bus signal

2327

2404

client.Rejected("Disabled")

2331

2408

# We are approved or approval is disabled

2332

2409

break

2333

2410

elif client.approved is None:

2334

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

2335

client.name)

2411

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

2412

client.name)

2336

2413

if self.server.use_dbus:

2337

2414

# Emit D-Bus signal

2338

2415

client.NeedApproval(

2339

2416

client.approval_delay.total_seconds()

2340

2417

* 1000, client.approved_by_default)

2341

2418

else:

2342

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

2343

client.name)

2419

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

2420

client.name)

2344

2421

if self.server.use_dbus:

2345

2422

# Emit D-Bus signal

2346

2423

client.Rejected("Denied")

2354

2431

time2 = datetime.datetime.now()

2355

2432

if (time2 - time) >= delay:

2356

2433

if not client.approved_by_default:

2357

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

2358

" waiting for approval",

2359

client.name)

2434

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

2435

" waiting for approval",

2436

client.name)

2360

2437

if self.server.use_dbus:

2361

2438

# Emit D-Bus signal

2362

2439

client.Rejected("Approval timed out")

2369

2446

try:

2370

2447

session.send(client.secret)

2371

2448

except gnutls.Error as error:

2372

logger.warning("gnutls send failed",

2373

exc_info=error)

2449

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

2374

2450

return

2375

2451

2376

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

2452

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

2377

2453

# bump the timeout using extended_timeout

2378

2454

client.bump_timeout(client.extended_timeout)

2379

2455

if self.server.use_dbus:

2386

2462

try:

2387

2463

session.bye()

2388

2464

except gnutls.Error as error:

2389

logger.warning("GnuTLS bye failed",

2390

exc_info=error)

2465

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

2391

2466

2392

2467

@staticmethod

2393

2468

def peer_certificate(session):

2394

2469

"Return the peer's certificate as a bytestring"

2395

2470

try:

2396

cert_type = gnutls.certificate_type_get2(session._c_object,

2397

gnutls.CTYPE_PEERS)

2471

cert_type = gnutls.certificate_type_get2(

2472

session, gnutls.CTYPE_PEERS)

2398

2473

except AttributeError:

2399

cert_type = gnutls.certificate_type_get(session._c_object)

2474

cert_type = gnutls.certificate_type_get(session)

2400

2475

if gnutls.has_rawpk:

2401

2476

valid_cert_types = frozenset((gnutls.CRT_RAWPK,))

2402

2477

else:

2403

2478

valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))

2404

2479

# If not a valid certificate type...

2405

2480

if cert_type not in valid_cert_types:

2406

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

2407

valid_cert_types)

2481

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

2482

valid_cert_types)

2408

2483

# ...return invalid data

2409

2484

return b""

2410

2485

list_size = ctypes.c_uint(1)

2411

2486

cert_list = (gnutls.certificate_get_peers

2412

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

2487

(session, ctypes.byref(list_size)))

2413

2488

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

2414

2489

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

2415

2490

if list_size.value == 0:

2437

2512

buf = ctypes.create_string_buffer(32)

2438

2513

buf_len = ctypes.c_size_t(len(buf))

2439

2514

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

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))

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))

2445

2521

# Deinit the certificate

2446

2522

gnutls.pubkey_deinit(pubkey)

2447

2523

2488

2564

return hex_fpr

2489

2565

2490

2566

2491

class MultiprocessingMixIn(object):

2567

class MultiprocessingMixIn:

2492

2568

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

2493

2569

2494

2570

def sub_process_main(self, request, address):

2506

2582

return proc

2507

2583

2508

2584

2509

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2585

class MultiprocessingMixInWithPipe(MultiprocessingMixIn):

2510

2586

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

2511

2587

2512

2588

def process_request(self, request, client_address):

2527

2603

2528

2604

2529

2605

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2530

socketserver.TCPServer, object):

2531

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

2606

socketserver.TCPServer):

2607

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

2532

2608

2533

2609

Attributes:

2534

2610

enabled: Boolean; whether this server is activated yet

2585

2661

if SO_BINDTODEVICE is None:

2586

2662

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

2587

2663

# common enough.

2588

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

2664

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

2589

2665

SO_BINDTODEVICE = 25

2590

2666

try:

2591

2667

self.socket.setsockopt(

2593

2669

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

2594

2670

except socket.error as error:

2595

2671

if error.errno == errno.EPERM:

2596

logger.error("No permission to bind to"

2597

" interface %s", self.interface)

2672

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

2673

self.interface)

2598

2674

elif error.errno == errno.ENOPROTOOPT:

2599

logger.error("SO_BINDTODEVICE not available;"

2600

" cannot bind to interface %s",

2601

self.interface)

2675

log.error("SO_BINDTODEVICE not available; cannot"

2676

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

2602

2677

elif error.errno == errno.ENODEV:

2603

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

2604

" cannot bind", self.interface)

2678

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

2679

" bind", self.interface)

2605

2680

else:

2606

2681

raise

2607

2682

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

2666

2741

def add_pipe(self, parent_pipe, proc):

2667

2742

# Call "handle_ipc" for both data and EOF events

2668

2743

GLib.io_add_watch(

2669

parent_pipe.fileno(),

2670

GLib.IO_IN | GLib.IO_HUP,

2744

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

2745

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

2671

2746

functools.partial(self.handle_ipc,

2672

2747

parent_pipe=parent_pipe,

2673

2748

proc=proc))

2686

2761

request = parent_pipe.recv()

2687

2762

command = request[0]

2688

2763

2689

if command == 'init':

2764

if command == "init":

2690

2765

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

2691

2766

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

2692

2767

address = request[3]

2693

2768

2694

2769

for c in self.clients.values():

2695

if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":

2770

if key_id == ("E3B0C44298FC1C149AFBF4C8996FB924"

2771

"27AE41E4649B934CA495991B7852B855"):

2696

2772

continue

2697

2773

if key_id and c.key_id == key_id:

2698

2774

client = c

2701

2777

client = c

2702

2778

break

2703

2779

else:

2704

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

2705

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

2780

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

2781

" %s", key_id or fpr, address)

2706

2782

if self.use_dbus:

2707

2783

# Emit D-Bus signal

2708

2784

mandos_dbus_service.ClientNotFound(key_id or fpr,

2711

2787

return False

2712

2788

2713

2789

GLib.io_add_watch(

2714

parent_pipe.fileno(),

2715

GLib.IO_IN | GLib.IO_HUP,

2790

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

2791

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

2716

2792

functools.partial(self.handle_ipc,

2717

2793

parent_pipe=parent_pipe,

2718

2794

proc=proc,

2721

2797

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

2722

2798

# same fileno

2723

2799

return False

2724

if command == 'funcall':

2800

if command == "funcall":

2725

2801

funcname = request[1]

2726

2802

args = request[2]

2727

2803

kwargs = request[3]

2728

2804

2729

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

2805

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

2730

2806

funcname)(*args,

2731

2807

**kwargs)))

2732

2808

2733

if command == 'getattr':

2809

if command == "getattr":

2734

2810

attrname = request[1]

2735

2811

if isinstance(client_object.__getattribute__(attrname),

2736

collections.Callable):

2737

parent_pipe.send(('function', ))

2812

collections.abc.Callable):

2813

parent_pipe.send(("function", ))

2738

2814

else:

2739

2815

parent_pipe.send((

2740

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

2816

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

2741

2817

2742

if command == 'setattr':

2818

if command == "setattr":

2743

2819

attrname = request[1]

2744

2820

value = request[2]

2745

2821

setattr(client_object, attrname, value)

2750

2826

def rfc3339_duration_to_delta(duration):

2751

2827

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

2752

2828

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)

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

2767

2845

"""

2768

2846

2769

2847

# Parsing an RFC 3339 duration with regular expressions is not

2849

2927

def string_to_delta(interval):

2850

2928

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

2851

2929

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)

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

2864

2942

"""

2865

2943

2866

2944

try:

2968

3046

2969

3047

options = parser.parse_args()

2970

3048

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

2976

3049

# Default values for config file for server-global settings

2977

3050

if gnutls.has_rawpk:

2978

3051

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

2998

3071

del priority

2999

3072

3000

3073

# Parse config file for server-global settings

3001

server_config = configparser.SafeConfigParser(server_defaults)

3074

server_config = configparser.ConfigParser(server_defaults)

3002

3075

del server_defaults

3003

3076

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

3004

# Convert the SafeConfigParser object to a dict

3077

# Convert the ConfigParser object to a dict

3005

3078

server_settings = server_config.defaults()

3006

3079

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

3007

3080

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

3074

3147

3075

3148

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

3076

3149

syslogger.setFormatter(

3077

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

3078

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

3150

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

3151

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

3079

3152

server_settings["servicename"])))

3080

3153

3081

3154

# Parse config file with clients

3082

client_config = configparser.SafeConfigParser(Client

3083

.client_defaults)

3155

client_config = configparser.ConfigParser(Client.client_defaults)

3084

3156

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

3085

3157

"clients.conf"))

3086

3158

3106

3178

try:

3107

3179

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

3108

3180

except IOError as e:

3109

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

3110

exc_info=e)

3181

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

3182

exc_info=e)

3111

3183

3112

3184

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

3113

3185

("mandos", "mandos"),

3124

3196

try:

3125

3197

os.setgid(gid)

3126

3198

os.setuid(uid)

3127

if debug:

3128

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

3129

gid))

3199

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

3130

3200

except OSError as error:

3131

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

3132

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

3201

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

3202

os.strerror(error.errno))

3133

3203

if error.errno != errno.EPERM:

3134

3204

raise

3135

3205

3142

3212

3143

3213

@gnutls.log_func

3144

3214

def debug_gnutls(level, string):

3145

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

3215

log.debug("GnuTLS: %s",

3216

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

3146

3217

3147

3218

gnutls.global_set_log_function(debug_gnutls)

3148

3219

3157

3228

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

3158

3229

daemon()

3159

3230

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()

3231

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

3232

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

3233

# need to inform GLib that threads will be used.

3234

GLib.threads_init()

3163

3235

3164

3236

global main_loop

3165

3237

# From the Avahi example code

3176

3248

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

3177

3249

do_not_queue=True)

3178

3250

except dbus.exceptions.DBusException as e:

3179

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

3251

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

3180

3252

use_dbus = False

3181

3253

server_settings["use_dbus"] = False

3182

3254

tcp_server.use_dbus = False

3241

3313

if isinstance(s, bytes)

3242

3314

else s) for s in

3243

3315

value["client_structure"]]

3244

# .name & .host

3245

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

3316

# .name, .host, and .checker_command

3317

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

3246

3318

if isinstance(value[k], bytes):

3247

3319

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

3248

3320

if "key_id" not in value:

3258

3330

for key, value in

3259

3331

bytes_old_client_settings.items()}

3260

3332

del bytes_old_client_settings

3261

# .host

3333

# .host and .checker_command

3262

3334

for value in old_client_settings.values():

3263

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

3264

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

3265

.decode("utf-8"))

3335

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

3336

if isinstance(value[attribute], bytes):

3337

value[attribute] = (value[attribute]

3338

.decode("utf-8"))

3266

3339

os.remove(stored_state_path)

3267

3340

except IOError as e:

3268

3341

if e.errno == errno.ENOENT:

3269

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

3270

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

3342

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

3343

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

3271

3344

else:

3272

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

3273

exc_info=e)

3345

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

3346

exc_info=e)

3274

3347

raise

3275

3348

except EOFError as e:

3276

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

3277

"EOFError:",

3278

exc_info=e)

3349

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

3350

exc_info=e)

3279

3351

3280

3352

with PGPEngine() as pgp:

3281

3353

for client_name, client in clients_data.items():

3308

3380

if client["enabled"]:

3309

3381

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

3310

3382

if not client["last_checked_ok"]:

3311

logger.warning(

3312

"disabling client {} - Client never "

3313

"performed a successful checker".format(

3314

client_name))

3383

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

3384

" never performed a successful"

3385

" checker", client_name)

3315

3386

client["enabled"] = False

3316

3387

elif client["last_checker_status"] != 0:

3317

logger.warning(

3318

"disabling client {} - Client last"

3319

" checker failed with error code"

3320

" {}".format(

3321

client_name,

3322

client["last_checker_status"]))

3388

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

3389

" last checker failed with error"

3390

" code %s", client_name,

3391

client["last_checker_status"])

3323

3392

client["enabled"] = False

3324

3393

else:

3325

3394

client["expires"] = (

3326

3395

datetime.datetime.utcnow()

3327

3396

+ client["timeout"])

3328

logger.debug("Last checker succeeded,"

3329

" keeping {} enabled".format(

3330

client_name))

3397

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

3398

" enabled", client_name)

3331

3399

try:

3332

3400

client["secret"] = pgp.decrypt(

3333

3401

client["encrypted_secret"],

3334

3402

client_settings[client_name]["secret"])

3335

3403

except PGPError:

3336

3404

# If decryption fails, we use secret from new settings

3337

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

3338

client_name))

3405

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

3406

client_name)

3339

3407

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

3340

3408

["secret"])

3341

3409

3355

3423

server_settings=server_settings)

3356

3424

3357

3425

if not tcp_server.clients:

3358

logger.warning("No clients defined")

3426

log.warning("No clients defined")

3359

3427

3360

3428

if not foreground:

3361

3429

if pidfile is not None:

3364

3432

with pidfile:

3365

3433

print(pid, file=pidfile)

3366

3434

except IOError:

3367

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

3368

pidfilename, pid)

3435

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

3436

pidfilename, pid)

3369

3437

del pidfile

3370

3438

del pidfilename

3371

3439

3521

3589

3522

3590

try:

3523

3591

with tempfile.NamedTemporaryFile(

3524

mode='wb',

3592

mode="wb",

3525

3593

suffix=".pickle",

3526

prefix='clients-',

3594

prefix="clients-",

3527

3595

dir=os.path.dirname(stored_state_path),

3528

3596

delete=False) as stored_state:

3529

3597

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

3537

3605

except NameError:

3538

3606

pass

3539

3607

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

3540

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

3541

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

3608

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

3609

os.strerror(e.errno))

3542

3610

else:

3543

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

3544

exc_info=e)

3611

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

3612

exc_info=e)

3545

3613

raise

3546

3614

3547

3615

# Delete all clients, and settings from config

3564

3632

mandos_dbus_service.client_added_signal(client)

3565

3633

# Need to initiate checking of clients

3566

3634

if client.enabled:

3567

client.init_checker()

3635

client.init_checker(randomize_start=True)

3568

3636

3569

3637

tcp_server.enable()

3570

3638

tcp_server.server_activate()

3573

3641

if zeroconf:

3574

3642

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

3575

3643

if use_ipv6:

3576

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

3577

" flowinfo %d, scope_id %d",

3578

*tcp_server.socket.getsockname())

3644

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

3645

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

3579

3646

else: # IPv4

3580

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

3581

*tcp_server.socket.getsockname())

3647

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

3648

*tcp_server.socket.getsockname())

3582

3649

3583

3650

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

3584

3651

3588

3655

try:

3589

3656

service.activate()

3590

3657

except dbus.exceptions.DBusException as error:

3591

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

3658

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

3592

3659

cleanup()

3593

3660

sys.exit(1)

3594

3661

# End of Avahi example code

3595

3662

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))

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

3668

3601

logger.debug("Starting main loop")

3669

log.debug("Starting main loop")

3602

3670

main_loop.run()

3603

3671

except AvahiError as error:

3604

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

3672

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

3605

3673

cleanup()

3606

3674

sys.exit(1)

3607

3675

except KeyboardInterrupt:

3608

3676

if debug:

3609

3677

print("", file=sys.stderr)

3610

logger.debug("Server received KeyboardInterrupt")

3611

logger.debug("Server exiting")

3678

log.debug("Server received KeyboardInterrupt")

3679

log.debug("Server exiting")

3612

3680

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

3613

3681

cleanup()

3614

3682

3615

3616

if __name__ == '__main__':

3617

main()

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: