/mandos/release : revision 408

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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 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 = "1.8.7"

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version = "1.8.15"

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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"""

428

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",

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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"""

453

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:

463

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:

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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"""

502

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

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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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509

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# Pretend that we have a GnuTLS module

510

class gnutls(object):

535

class gnutls:

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

512

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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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# Types

540

class session_int(ctypes.Structure):

565

class _session_int(ctypes.Structure):

541

566

_fields_ = []

542

session_t = ctypes.POINTER(session_int)

567

session_t = ctypes.POINTER(_session_int)

543

568

544

569

class certificate_credentials_st(ctypes.Structure):

545

570

_fields_ = []

548

573

certificate_type_t = ctypes.c_int

549

574

550

575

class datum_t(ctypes.Structure):

551

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

552

('size', ctypes.c_uint)]

576

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

577

("size", ctypes.c_uint)]

553

578

554

class openpgp_crt_int(ctypes.Structure):

579

class _openpgp_crt_int(ctypes.Structure):

555

580

_fields_ = []

556

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

558

583

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

559

584

credentials_type_t = ctypes.c_int

568

593

# gnutls.strerror()

569

594

self.code = code

570

595

if message is None and code is not None:

571

message = gnutls.strerror(code)

596

message = gnutls.strerror(code).decode(

597

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

572

598

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

573

599

message, *args)

574

600

575

601

class CertificateSecurityError(Error):

576

602

pass

577

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

578

629

# Classes

579

class Credentials(object):

630

class Credentials(With_from_param):

580

631

def __init__(self):

581

self._c_object = gnutls.certificate_credentials_t()

582

gnutls.certificate_allocate_credentials(

583

ctypes.byref(self._c_object))

632

self._as_parameter_ = gnutls.certificate_credentials_t()

633

gnutls.certificate_allocate_credentials(self)

584

634

self.type = gnutls.CRD_CERTIFICATE

585

635

586

636

def __del__(self):

587

gnutls.certificate_free_credentials(self._c_object)

637

gnutls.certificate_free_credentials(self)

588

638

589

class ClientSession(object):

639

class ClientSession(With_from_param):

590

640

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

591

self._c_object = gnutls.session_t()

641

self._as_parameter_ = gnutls.session_t()

592

642

gnutls_flags = gnutls.CLIENT

593

643

if gnutls.check_version(b"3.5.6"):

594

644

gnutls_flags |= gnutls.NO_TICKETS

595

645

if gnutls.has_rawpk:

596

646

gnutls_flags |= gnutls.ENABLE_RAWPK

597

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

647

gnutls.init(self, gnutls_flags)

598

648

del gnutls_flags

599

gnutls.set_default_priority(self._c_object)

600

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

601

gnutls.handshake_set_private_extensions(self._c_object,

602

True)

649

gnutls.set_default_priority(self)

650

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

651

gnutls.handshake_set_private_extensions(self, True)

603

652

self.socket = socket

604

653

if credentials is None:

605

654

credentials = gnutls.Credentials()

606

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

607

ctypes.cast(credentials._c_object,

608

ctypes.c_void_p))

655

gnutls.credentials_set(self, credentials.type,

656

credentials)

609

657

self.credentials = credentials

610

658

611

659

def __del__(self):

612

gnutls.deinit(self._c_object)

660

gnutls.deinit(self)

613

661

614

662

def handshake(self):

615

return gnutls.handshake(self._c_object)

663

return gnutls.handshake(self)

616

664

617

665

def send(self, data):

618

666

data = bytes(data)

619

667

data_len = len(data)

620

668

while data_len > 0:

621

data_len -= gnutls.record_send(self._c_object,

622

data[-data_len:],

669

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

623

670

data_len)

624

671

625

672

def bye(self):

626

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

673

return gnutls.bye(self, gnutls.SHUT_RDWR)

627

674

628

675

# Error handling functions

629

676

def _error_code(result):

630

677

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

631

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

632

if result >= 0:

678

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

679

if result >= gnutls.E_SUCCESS:

633

680

return result

634

681

if result == gnutls.E_NO_CERTIFICATE_FOUND:

635

682

raise gnutls.CertificateSecurityError(code=result)

636

683

raise gnutls.Error(code=result)

637

684

638

def _retry_on_error(result, func, arguments):

685

def _retry_on_error(result, func, arguments,

686

_error_code=_error_code):

639

687

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

640

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

641

while result < 0:

688

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

689

while result < gnutls.E_SUCCESS:

642

690

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

643

691

return _error_code(result)

644

692

result = func(*arguments)

649

697

650

698

# Functions

651

699

priority_set_direct = _library.gnutls_priority_set_direct

652

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

700

priority_set_direct.argtypes = [ClientSession, ctypes.c_char_p,

653

701

ctypes.POINTER(ctypes.c_char_p)]

654

702

priority_set_direct.restype = _error_code

655

703

656

704

init = _library.gnutls_init

657

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

705

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

658

706

init.restype = _error_code

659

707

660

708

set_default_priority = _library.gnutls_set_default_priority

661

set_default_priority.argtypes = [session_t]

709

set_default_priority.argtypes = [ClientSession]

662

710

set_default_priority.restype = _error_code

663

711

664

712

record_send = _library.gnutls_record_send

665

record_send.argtypes = [session_t, ctypes.c_void_p,

713

record_send.argtypes = [ClientSession, ctypes.c_void_p,

666

714

ctypes.c_size_t]

667

715

record_send.restype = ctypes.c_ssize_t

668

716

record_send.errcheck = _retry_on_error

670

718

certificate_allocate_credentials = (

671

719

_library.gnutls_certificate_allocate_credentials)

672

720

certificate_allocate_credentials.argtypes = [

673

ctypes.POINTER(certificate_credentials_t)]

721

PointerTo(Credentials)]

674

722

certificate_allocate_credentials.restype = _error_code

675

723

676

724

certificate_free_credentials = (

677

725

_library.gnutls_certificate_free_credentials)

678

certificate_free_credentials.argtypes = [

679

certificate_credentials_t]

726

certificate_free_credentials.argtypes = [Credentials]

680

727

certificate_free_credentials.restype = None

681

728

682

729

handshake_set_private_extensions = (

683

730

_library.gnutls_handshake_set_private_extensions)

684

handshake_set_private_extensions.argtypes = [session_t,

731

handshake_set_private_extensions.argtypes = [ClientSession,

685

732

ctypes.c_int]

686

733

handshake_set_private_extensions.restype = None

687

734

688

735

credentials_set = _library.gnutls_credentials_set

689

credentials_set.argtypes = [session_t, credentials_type_t,

690

ctypes.c_void_p]

736

credentials_set.argtypes = [ClientSession, credentials_type_t,

737

CastToVoidPointer(Credentials)]

691

738

credentials_set.restype = _error_code

692

739

693

740

strerror = _library.gnutls_strerror

695

742

strerror.restype = ctypes.c_char_p

696

743

697

744

certificate_type_get = _library.gnutls_certificate_type_get

698

certificate_type_get.argtypes = [session_t]

745

certificate_type_get.argtypes = [ClientSession]

699

746

certificate_type_get.restype = _error_code

700

747

701

748

certificate_get_peers = _library.gnutls_certificate_get_peers

702

certificate_get_peers.argtypes = [session_t,

749

certificate_get_peers.argtypes = [ClientSession,

703

750

ctypes.POINTER(ctypes.c_uint)]

704

751

certificate_get_peers.restype = ctypes.POINTER(datum_t)

705

752

712

759

global_set_log_function.restype = None

713

760

714

761

deinit = _library.gnutls_deinit

715

deinit.argtypes = [session_t]

762

deinit.argtypes = [ClientSession]

716

763

deinit.restype = None

717

764

718

765

handshake = _library.gnutls_handshake

719

handshake.argtypes = [session_t]

720

handshake.restype = _error_code

766

handshake.argtypes = [ClientSession]

767

handshake.restype = ctypes.c_int

721

768

handshake.errcheck = _retry_on_error

722

769

723

770

transport_set_ptr = _library.gnutls_transport_set_ptr

724

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

771

transport_set_ptr.argtypes = [ClientSession, transport_ptr_t]

725

772

transport_set_ptr.restype = None

726

773

727

774

bye = _library.gnutls_bye

728

bye.argtypes = [session_t, close_request_t]

729

bye.restype = _error_code

775

bye.argtypes = [ClientSession, close_request_t]

776

bye.restype = ctypes.c_int

730

777

bye.errcheck = _retry_on_error

731

778

732

779

check_version = _library.gnutls_check_version

749

796

750

797

x509_crt_fmt_t = ctypes.c_int

751

798

752

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

799

# All the function declarations below are from

800

# gnutls/abstract.h

753

801

pubkey_init = _library.gnutls_pubkey_init

754

802

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

755

803

pubkey_init.restype = _error_code

769

817

pubkey_deinit.argtypes = [pubkey_t]

770

818

pubkey_deinit.restype = None

771

819

else:

772

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

820

# All the function declarations below are from

821

# gnutls/openpgp.h

773

822

774

823

openpgp_crt_init = _library.gnutls_openpgp_crt_init

775

824

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

781

830

openpgp_crt_fmt_t]

782

831

openpgp_crt_import.restype = _error_code

783

832

784

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

785

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

786

ctypes.POINTER(ctypes.c_uint)]

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

]

787

840

openpgp_crt_verify_self.restype = _error_code

788

841

789

842

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

800

853

801

854

if check_version(b"3.6.4"):

802

855

certificate_type_get2 = _library.gnutls_certificate_type_get2

803

certificate_type_get2.argtypes = [session_t, ctypes.c_int]

856

certificate_type_get2.argtypes = [ClientSession, ctypes.c_int]

804

857

certificate_type_get2.restype = _error_code

805

858

806

859

# Remove non-public functions

818

871

connection.close()

819

872

820

873

821

class Client(object):

874

class Client:

822

875

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

823

876

824

877

Attributes:

825

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

878

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

826

879

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

827

880

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

828

881

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

829

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

882

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

830

883

running.

831

884

checker_callback_tag: a GLib event source tag, or None

832

885

checker_command: string; External command which is run to check

956

1009

self.last_enabled = None

957

1010

self.expires = None

958

1011

959

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

960

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

961

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)

962

1015

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

963

1016

datetime.datetime.utcnow())

964

1017

992

1045

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

993

1046

# Already enabled

994

1047

return

995

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

996

1048

self.enabled = True

997

1049

self.last_enabled = datetime.datetime.utcnow()

998

1050

self.init_checker()

1003

1055

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

1004

1056

return False

1005

1057

if not quiet:

1006

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

1058

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

1007

1059

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

1008

1060

GLib.source_remove(self.disable_initiator_tag)

1009

1061

self.disable_initiator_tag = None

1021

1073

def __del__(self):

1022

1074

self.disable()

1023

1075

1024

def init_checker(self):

1025

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

1026

# 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.

1027

1081

if self.checker_initiator_tag is not None:

1028

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

1029

1090

self.checker_initiator_tag = GLib.timeout_add(

1030

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

1031

self.start_checker)

1032

# 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

1033

1100

if self.disable_initiator_tag is not None:

1034

1101

GLib.source_remove(self.disable_initiator_tag)

1035

1102

self.disable_initiator_tag = GLib.timeout_add(

1036

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

1037

# Also start a new checker *right now*.

1038

self.start_checker()

1103

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

1104

self.disable)

1039

1105

1040

1106

def checker_callback(self, source, condition, connection,

1041

1107

command):

1043

1109

# Read return code from connection (see call_pipe)

1044

1110

returncode = connection.recv()

1045

1111

connection.close()

1046

self.checker.join()

1112

if self.checker is not None:

1113

self.checker.join()

1047

1114

self.checker_callback_tag = None

1048

1115

self.checker = None

1049

1116

1051

1118

self.last_checker_status = returncode

1052

1119

self.last_checker_signal = None

1053

1120

if self.last_checker_status == 0:

1054

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

1055

vars(self))

1121

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

1056

1122

self.checked_ok()

1057

1123

else:

1058

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

1124

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

1059

1125

else:

1060

1126

self.last_checker_status = -1

1061

1127

self.last_checker_signal = -returncode

1062

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

1063

vars(self))

1128

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

1064

1129

return False

1065

1130

1066

1131

def checked_ok(self):

1085

1150

def need_approval(self):

1086

1151

self.last_approval_request = datetime.datetime.utcnow()

1087

1152

1088

def start_checker(self):

1153

def start_checker(self, start_was_randomized=False):

1089

1154

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

1090

1155

1091

1156

If a checker already exists, leave it running and do

1100

1165

# should be.

1101

1166

1102

1167

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

1103

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

1168

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

1104

1169

self.checker.join()

1105

1170

self.checker = None

1106

1171

# Start a new checker if needed

1107

1172

if self.checker is None:

1108

1173

# Escape attributes for the shell

1109

1174

escaped_attrs = {

1110

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

1175

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

1111

1176

for attr in self.runtime_expansions}

1112

1177

try:

1113

1178

command = self.checker_command % escaped_attrs

1114

1179

except TypeError as error:

1115

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

1116

self.checker_command,

1117

exc_info=error)

1180

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

1181

self.checker_command, exc_info=error)

1118

1182

return True # Try again later

1119

1183

self.current_checker_command = command

1120

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

1121

self.name)

1184

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

1122

1185

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

1123

1186

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

1124

1187

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

1140

1203

kwargs=popen_args)

1141

1204

self.checker.start()

1142

1205

self.checker_callback_tag = GLib.io_add_watch(

1143

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

1206

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

1207

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

1144

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

1145

1220

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

1146

1221

return True

1147

1222

1152

1227

self.checker_callback_tag = None

1153

1228

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

1154

1229

return

1155

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

1230

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

1156

1231

self.checker.terminate()

1157

1232

self.checker = None

1158

1233

1185

1260

func._dbus_name = func.__name__

1186

1261

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

1187

1262

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

1188

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

1263

func._dbus_get_args_options = {"byte_arrays": byte_arrays}

1189

1264

return func

1190

1265

1191

1266

return decorator

1280

1355

1281

1356

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1282

1357

out_signature="s",

1283

path_keyword='object_path',

1284

connection_keyword='connection')

1358

path_keyword="object_path",

1359

connection_keyword="connection")

1285

1360

def Introspect(self, object_path, connection):

1286

1361

"""Overloading of standard D-Bus method.

1287

1362

1336

1411

document.unlink()

1337

1412

except (AttributeError, xml.dom.DOMException,

1338

1413

xml.parsers.expat.ExpatError) as error:

1339

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

1340

exc_info=error)

1414

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

1415

exc_info=error)

1341

1416

return xmlstring

1342

1417

1343

1418

1401

1476

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

1402

1477

"'ay' signature {!r}"

1403

1478

.format(prop._dbus_signature))

1404

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

1405

for byte in value))

1479

value = dbus.ByteArray(bytes(value))

1406

1480

prop(value)

1407

1481

1408

1482

@dbus.service.method(dbus.PROPERTIES_IFACE,

1441

1515

1442

1516

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1443

1517

out_signature="s",

1444

path_keyword='object_path',

1445

connection_keyword='connection')

1518

path_keyword="object_path",

1519

connection_keyword="connection")

1446

1520

def Introspect(self, object_path, connection):

1447

1521

"""Overloading of standard D-Bus method.

1448

1522

1504

1578

document.unlink()

1505

1579

except (AttributeError, xml.dom.DOMException,

1506

1580

xml.parsers.expat.ExpatError) as error:

1507

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

1508

exc_info=error)

1581

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

1582

exc_info=error)

1509

1583

return xmlstring

1510

1584

1511

1585

1543

1617

1544

1618

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1545

1619

out_signature="s",

1546

path_keyword='object_path',

1547

connection_keyword='connection')

1620

path_keyword="object_path",

1621

connection_keyword="connection")

1548

1622

def Introspect(self, object_path, connection):

1549

1623

"""Overloading of standard D-Bus method.

1550

1624

1575

1649

document.unlink()

1576

1650

except (AttributeError, xml.dom.DOMException,

1577

1651

xml.parsers.expat.ExpatError) as error:

1578

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

1579

exc_info=error)

1652

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

1653

exc_info=error)

1580

1654

return xmlstring

1581

1655

1582

1656

2213

2287

del _interface

2214

2288

2215

2289

2216

class ProxyClient(object):

2290

class ProxyClient:

2217

2291

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

2218

2292

self._pipe = child_pipe

2219

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

2293

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

2220

2294

if not self._pipe.recv():

2221

2295

raise KeyError(key_id or fpr)

2222

2296

2223

2297

def __getattribute__(self, name):

2224

if name == '_pipe':

2298

if name == "_pipe":

2225

2299

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

2226

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

2300

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

2227

2301

data = self._pipe.recv()

2228

if data[0] == 'data':

2302

if data[0] == "data":

2229

2303

return data[1]

2230

if data[0] == 'function':

2304

if data[0] == "function":

2231

2305

2232

2306

def func(*args, **kwargs):

2233

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

2307

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

2234

2308

return self._pipe.recv()[1]

2235

2309

2236

2310

return func

2237

2311

2238

2312

def __setattr__(self, name, value):

2239

if name == '_pipe':

2313

if name == "_pipe":

2240

2314

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

2241

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

2315

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

2242

2316

2243

2317

2244

2318

class ClientHandler(socketserver.BaseRequestHandler, object):

2249

2323

2250

2324

def handle(self):

2251

2325

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

2252

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

2253

str(self.client_address))

2254

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

2255

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())

2256

2329

2257

2330

session = gnutls.ClientSession(self.request)

2258

2331

2259

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

2332

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

2260

2333

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

2261

2334

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

2262

2335

# "+DHE-DSS"))

2264

2337

priority = self.server.gnutls_priority

2265

2338

if priority is None:

2266

2339

priority = "NORMAL"

2267

gnutls.priority_set_direct(session._c_object,

2268

priority.encode("utf-8"),

2269

None)

2340

gnutls.priority_set_direct(session,

2341

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

2270

2342

2271

2343

# Start communication using the Mandos protocol

2272

2344

# Get protocol number

2273

2345

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

2274

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

2346

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

2275

2347

try:

2276

2348

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

2277

2349

raise RuntimeError(line)

2278

2350

except (ValueError, IndexError, RuntimeError) as error:

2279

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

2351

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

2280

2352

return

2281

2353

2282

2354

# Start GnuTLS connection

2283

2355

try:

2284

2356

session.handshake()

2285

2357

except gnutls.Error as error:

2286

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

2358

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

2287

2359

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

2288

2360

# established. Just abandon the request.

2289

2361

return

2290

logger.debug("Handshake succeeded")

2362

log.debug("Handshake succeeded")

2291

2363

2292

2364

approval_required = False

2293

2365

try:

2297

2369

key_id = self.key_id(

2298

2370

self.peer_certificate(session))

2299

2371

except (TypeError, gnutls.Error) as error:

2300

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

2372

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

2301

2373

return

2302

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

2374

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

2375

key_id.decode("utf-8",

2376

errors="replace"))

2303

2377

2304

2378

else:

2305

2379

key_id = b""

2307

2381

fpr = self.fingerprint(

2308

2382

self.peer_certificate(session))

2309

2383

except (TypeError, gnutls.Error) as error:

2310

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

2384

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

2311

2385

return

2312

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

2386

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

2313

2387

2314

2388

try:

2315

2389

client = ProxyClient(child_pipe, key_id, fpr,

2324

2398

2325

2399

while True:

2326

2400

if not client.enabled:

2327

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

2328

client.name)

2401

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

2329

2402

if self.server.use_dbus:

2330

2403

# Emit D-Bus signal

2331

2404

client.Rejected("Disabled")

2335

2408

# We are approved or approval is disabled

2336

2409

break

2337

2410

elif client.approved is None:

2338

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

2339

client.name)

2411

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

2412

client.name)

2340

2413

if self.server.use_dbus:

2341

2414

# Emit D-Bus signal

2342

2415

client.NeedApproval(

2343

2416

client.approval_delay.total_seconds()

2344

2417

* 1000, client.approved_by_default)

2345

2418

else:

2346

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

2347

client.name)

2419

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

2420

client.name)

2348

2421

if self.server.use_dbus:

2349

2422

# Emit D-Bus signal

2350

2423

client.Rejected("Denied")

2358

2431

time2 = datetime.datetime.now()

2359

2432

if (time2 - time) >= delay:

2360

2433

if not client.approved_by_default:

2361

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

2362

" waiting for approval",

2363

client.name)

2434

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

2435

" waiting for approval",

2436

client.name)

2364

2437

if self.server.use_dbus:

2365

2438

# Emit D-Bus signal

2366

2439

client.Rejected("Approval timed out")

2373

2446

try:

2374

2447

session.send(client.secret)

2375

2448

except gnutls.Error as error:

2376

logger.warning("gnutls send failed",

2377

exc_info=error)

2449

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

2378

2450

return

2379

2451

2380

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

2452

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

2381

2453

# bump the timeout using extended_timeout

2382

2454

client.bump_timeout(client.extended_timeout)

2383

2455

if self.server.use_dbus:

2390

2462

try:

2391

2463

session.bye()

2392

2464

except gnutls.Error as error:

2393

logger.warning("GnuTLS bye failed",

2394

exc_info=error)

2465

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

2395

2466

2396

2467

@staticmethod

2397

2468

def peer_certificate(session):

2398

2469

"Return the peer's certificate as a bytestring"

2399

2470

try:

2400

cert_type = gnutls.certificate_type_get2(session._c_object,

2401

gnutls.CTYPE_PEERS)

2471

cert_type = gnutls.certificate_type_get2(

2472

session, gnutls.CTYPE_PEERS)

2402

2473

except AttributeError:

2403

cert_type = gnutls.certificate_type_get(session._c_object)

2474

cert_type = gnutls.certificate_type_get(session)

2404

2475

if gnutls.has_rawpk:

2405

2476

valid_cert_types = frozenset((gnutls.CRT_RAWPK,))

2406

2477

else:

2407

2478

valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))

2408

2479

# If not a valid certificate type...

2409

2480

if cert_type not in valid_cert_types:

2410

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

2411

valid_cert_types)

2481

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

2482

valid_cert_types)

2412

2483

# ...return invalid data

2413

2484

return b""

2414

2485

list_size = ctypes.c_uint(1)

2415

2486

cert_list = (gnutls.certificate_get_peers

2416

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

2487

(session, ctypes.byref(list_size)))

2417

2488

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

2418

2489

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

2419

2490

if list_size.value == 0:

2441

2512

buf = ctypes.create_string_buffer(32)

2442

2513

buf_len = ctypes.c_size_t(len(buf))

2443

2514

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

2444

gnutls.pubkey_get_key_id(pubkey,

2445

gnutls.KEYID_USE_SHA256,

2446

ctypes.cast(ctypes.byref(buf),

2447

ctypes.POINTER(ctypes.c_ubyte)),

2448

ctypes.byref(buf_len))

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))

2449

2521

# Deinit the certificate

2450

2522

gnutls.pubkey_deinit(pubkey)

2451

2523

2492

2564

return hex_fpr

2493

2565

2494

2566

2495

class MultiprocessingMixIn(object):

2567

class MultiprocessingMixIn:

2496

2568

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

2497

2569

2498

2570

def sub_process_main(self, request, address):

2510

2582

return proc

2511

2583

2512

2584

2513

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2585

class MultiprocessingMixInWithPipe(MultiprocessingMixIn):

2514

2586

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

2515

2587

2516

2588

def process_request(self, request, client_address):

2531

2603

2532

2604

2533

2605

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2534

socketserver.TCPServer, object):

2535

"""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

2536

2608

2537

2609

Attributes:

2538

2610

enabled: Boolean; whether this server is activated yet

2589

2661

if SO_BINDTODEVICE is None:

2590

2662

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

2591

2663

# common enough.

2592

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

2664

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

2593

2665

SO_BINDTODEVICE = 25

2594

2666

try:

2595

2667

self.socket.setsockopt(

2597

2669

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

2598

2670

except socket.error as error:

2599

2671

if error.errno == errno.EPERM:

2600

logger.error("No permission to bind to"

2601

" interface %s", self.interface)

2672

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

2673

self.interface)

2602

2674

elif error.errno == errno.ENOPROTOOPT:

2603

logger.error("SO_BINDTODEVICE not available;"

2604

" cannot bind to interface %s",

2605

self.interface)

2675

log.error("SO_BINDTODEVICE not available; cannot"

2676

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

2606

2677

elif error.errno == errno.ENODEV:

2607

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

2608

" cannot bind", self.interface)

2678

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

2679

" bind", self.interface)

2609

2680

else:

2610

2681

raise

2611

2682

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

2670

2741

def add_pipe(self, parent_pipe, proc):

2671

2742

# Call "handle_ipc" for both data and EOF events

2672

2743

GLib.io_add_watch(

2673

parent_pipe.fileno(),

2674

GLib.IO_IN | GLib.IO_HUP,

2744

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

2745

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

2675

2746

functools.partial(self.handle_ipc,

2676

2747

parent_pipe=parent_pipe,

2677

2748

proc=proc))

2690

2761

request = parent_pipe.recv()

2691

2762

command = request[0]

2692

2763

2693

if command == 'init':

2764

if command == "init":

2694

2765

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

2695

2766

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

2696

2767

address = request[3]

2697

2768

2698

2769

for c in self.clients.values():

2699

if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":

2770

if key_id == ("E3B0C44298FC1C149AFBF4C8996FB924"

2771

"27AE41E4649B934CA495991B7852B855"):

2700

2772

continue

2701

2773

if key_id and c.key_id == key_id:

2702

2774

client = c

2705

2777

client = c

2706

2778

break

2707

2779

else:

2708

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

2709

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

2780

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

2781

" %s", key_id or fpr, address)

2710

2782

if self.use_dbus:

2711

2783

# Emit D-Bus signal

2712

2784

mandos_dbus_service.ClientNotFound(key_id or fpr,

2715

2787

return False

2716

2788

2717

2789

GLib.io_add_watch(

2718

parent_pipe.fileno(),

2719

GLib.IO_IN | GLib.IO_HUP,

2790

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

2791

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

2720

2792

functools.partial(self.handle_ipc,

2721

2793

parent_pipe=parent_pipe,

2722

2794

proc=proc,

2725

2797

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

2726

2798

# same fileno

2727

2799

return False

2728

if command == 'funcall':

2800

if command == "funcall":

2729

2801

funcname = request[1]

2730

2802

args = request[2]

2731

2803

kwargs = request[3]

2732

2804

2733

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

2805

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

2734

2806

funcname)(*args,

2735

2807

**kwargs)))

2736

2808

2737

if command == 'getattr':

2809

if command == "getattr":

2738

2810

attrname = request[1]

2739

2811

if isinstance(client_object.__getattribute__(attrname),

2740

collections.Callable):

2741

parent_pipe.send(('function', ))

2812

collections.abc.Callable):

2813

parent_pipe.send(("function", ))

2742

2814

else:

2743

2815

parent_pipe.send((

2744

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

2816

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

2745

2817

2746

if command == 'setattr':

2818

if command == "setattr":

2747

2819

attrname = request[1]

2748

2820

value = request[2]

2749

2821

setattr(client_object, attrname, value)

2754

2826

def rfc3339_duration_to_delta(duration):

2755

2827

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

2756

2828

2757

>>> rfc3339_duration_to_delta("P7D")

2758

datetime.timedelta(7)

2759

>>> rfc3339_duration_to_delta("PT60S")

2760

datetime.timedelta(0, 60)

2761

>>> rfc3339_duration_to_delta("PT60M")

2762

datetime.timedelta(0, 3600)

2763

>>> rfc3339_duration_to_delta("PT24H")

2764

datetime.timedelta(1)

2765

>>> rfc3339_duration_to_delta("P1W")

2766

datetime.timedelta(7)

2767

>>> rfc3339_duration_to_delta("PT5M30S")

2768

datetime.timedelta(0, 330)

2769

>>> rfc3339_duration_to_delta("P1DT3M20S")

2770

datetime.timedelta(1, 200)

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

2771

2845

"""

2772

2846

2773

2847

# Parsing an RFC 3339 duration with regular expressions is not

2853

2927

def string_to_delta(interval):

2854

2928

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

2855

2929

2856

>>> string_to_delta('7d')

2857

datetime.timedelta(7)

2858

>>> string_to_delta('60s')

2859

datetime.timedelta(0, 60)

2860

>>> string_to_delta('60m')

2861

datetime.timedelta(0, 3600)

2862

>>> string_to_delta('24h')

2863

datetime.timedelta(1)

2864

>>> string_to_delta('1w')

2865

datetime.timedelta(7)

2866

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

2867

datetime.timedelta(0, 330)

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

2868

2942

"""

2869

2943

2870

2944

try:

2972

3046

2973

3047

options = parser.parse_args()

2974

3048

2975

if options.check:

2976

import doctest

2977

fail_count, test_count = doctest.testmod()

2978

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

2979

2980

3049

# Default values for config file for server-global settings

2981

3050

if gnutls.has_rawpk:

2982

3051

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

3078

3147

3079

3148

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

3080

3149

syslogger.setFormatter(

3081

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

3082

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

3150

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

3151

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

3083

3152

server_settings["servicename"])))

3084

3153

3085

3154

# Parse config file with clients

3109

3178

try:

3110

3179

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

3111

3180

except IOError as e:

3112

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

3113

exc_info=e)

3181

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

3182

exc_info=e)

3114

3183

3115

3184

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

3116

3185

("mandos", "mandos"),

3127

3196

try:

3128

3197

os.setgid(gid)

3129

3198

os.setuid(uid)

3130

if debug:

3131

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

3132

gid))

3199

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

3133

3200

except OSError as error:

3134

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

3135

.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))

3136

3203

if error.errno != errno.EPERM:

3137

3204

raise

3138

3205

3145

3212

3146

3213

@gnutls.log_func

3147

3214

def debug_gnutls(level, string):

3148

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

3215

log.debug("GnuTLS: %s",

3216

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

3149

3217

3150

3218

gnutls.global_set_log_function(debug_gnutls)

3151

3219

3180

3248

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

3181

3249

do_not_queue=True)

3182

3250

except dbus.exceptions.DBusException as e:

3183

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

3251

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

3184

3252

use_dbus = False

3185

3253

server_settings["use_dbus"] = False

3186

3254

tcp_server.use_dbus = False

3245

3313

if isinstance(s, bytes)

3246

3314

else s) for s in

3247

3315

value["client_structure"]]

3248

# .name & .host

3249

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

3316

# .name, .host, and .checker_command

3317

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

3250

3318

if isinstance(value[k], bytes):

3251

3319

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

3252

3320

if "key_id" not in value:

3262

3330

for key, value in

3263

3331

bytes_old_client_settings.items()}

3264

3332

del bytes_old_client_settings

3265

# .host

3333

# .host and .checker_command

3266

3334

for value in old_client_settings.values():

3267

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

3268

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

3269

.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"))

3270

3339

os.remove(stored_state_path)

3271

3340

except IOError as e:

3272

3341

if e.errno == errno.ENOENT:

3273

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

3274

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

3342

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

3343

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

3275

3344

else:

3276

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

3277

exc_info=e)

3345

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

3346

exc_info=e)

3278

3347

raise

3279

3348

except EOFError as e:

3280

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

3281

"EOFError:",

3282

exc_info=e)

3349

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

3350

exc_info=e)

3283

3351

3284

3352

with PGPEngine() as pgp:

3285

3353

for client_name, client in clients_data.items():

3312

3380

if client["enabled"]:

3313

3381

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

3314

3382

if not client["last_checked_ok"]:

3315

logger.warning(

3316

"disabling client {} - Client never "

3317

"performed a successful checker".format(

3318

client_name))

3383

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

3384

" never performed a successful"

3385

" checker", client_name)

3319

3386

client["enabled"] = False

3320

3387

elif client["last_checker_status"] != 0:

3321

logger.warning(

3322

"disabling client {} - Client last"

3323

" checker failed with error code"

3324

" {}".format(

3325

client_name,

3326

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"])

3327

3392

client["enabled"] = False

3328

3393

else:

3329

3394

client["expires"] = (

3330

3395

datetime.datetime.utcnow()

3331

3396

+ client["timeout"])

3332

logger.debug("Last checker succeeded,"

3333

" keeping {} enabled".format(

3334

client_name))

3397

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

3398

" enabled", client_name)

3335

3399

try:

3336

3400

client["secret"] = pgp.decrypt(

3337

3401

client["encrypted_secret"],

3338

3402

client_settings[client_name]["secret"])

3339

3403

except PGPError:

3340

3404

# If decryption fails, we use secret from new settings

3341

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

3342

client_name))

3405

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

3406

client_name)

3343

3407

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

3344

3408

["secret"])

3345

3409

3359

3423

server_settings=server_settings)

3360

3424

3361

3425

if not tcp_server.clients:

3362

logger.warning("No clients defined")

3426

log.warning("No clients defined")

3363

3427

3364

3428

if not foreground:

3365

3429

if pidfile is not None:

3368

3432

with pidfile:

3369

3433

print(pid, file=pidfile)

3370

3434

except IOError:

3371

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

3372

pidfilename, pid)

3435

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

3436

pidfilename, pid)

3373

3437

del pidfile

3374

3438

del pidfilename

3375

3439

3525

3589

3526

3590

try:

3527

3591

with tempfile.NamedTemporaryFile(

3528

mode='wb',

3592

mode="wb",

3529

3593

suffix=".pickle",

3530

prefix='clients-',

3594

prefix="clients-",

3531

3595

dir=os.path.dirname(stored_state_path),

3532

3596

delete=False) as stored_state:

3533

3597

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

3541

3605

except NameError:

3542

3606

pass

3543

3607

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

3544

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

3545

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

3608

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

3609

os.strerror(e.errno))

3546

3610

else:

3547

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

3548

exc_info=e)

3611

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

3612

exc_info=e)

3549

3613

raise

3550

3614

3551

3615

# Delete all clients, and settings from config

3568

3632

mandos_dbus_service.client_added_signal(client)

3569

3633

# Need to initiate checking of clients

3570

3634

if client.enabled:

3571

client.init_checker()

3635

client.init_checker(randomize_start=True)

3572

3636

3573

3637

tcp_server.enable()

3574

3638

tcp_server.server_activate()

3577

3641

if zeroconf:

3578

3642

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

3579

3643

if use_ipv6:

3580

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

3581

" flowinfo %d, scope_id %d",

3582

*tcp_server.socket.getsockname())

3644

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

3645

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

3583

3646

else: # IPv4

3584

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

3585

*tcp_server.socket.getsockname())

3647

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

3648

*tcp_server.socket.getsockname())

3586

3649

3587

3650

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

3588

3651

3592

3655

try:

3593

3656

service.activate()

3594

3657

except dbus.exceptions.DBusException as error:

3595

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

3658

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

3596

3659

cleanup()

3597

3660

sys.exit(1)

3598

3661

# End of Avahi example code

3599

3662

3600

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

3601

lambda *args, **kwargs:

3602

(tcp_server.handle_request

3603

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

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))

3604

3668

3605

logger.debug("Starting main loop")

3669

log.debug("Starting main loop")

3606

3670

main_loop.run()

3607

3671

except AvahiError as error:

3608

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

3672

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

3609

3673

cleanup()

3610

3674

sys.exit(1)

3611

3675

except KeyboardInterrupt:

3612

3676

if debug:

3613

3677

print("", file=sys.stderr)

3614

logger.debug("Server received KeyboardInterrupt")

3615

logger.debug("Server exiting")

3678

log.debug("Server received KeyboardInterrupt")

3679

log.debug("Server exiting")

3616

3680

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

3617

3681

cleanup()

3618

3682

3619

3620

if __name__ == '__main__':

3621

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: