/mandos/release : revision 237.7.854

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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 = "1.8.5"

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version = "1.8.17"

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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)

438

"StateChanged", self.entry_group_state_changed))

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

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self.name, self.type)

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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"""

424

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

453

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

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if state == avahi.ENTRY_GROUP_ESTABLISHED:

427

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"""

449

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:

459

logger.error(bad_states[state])

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log.error(bad_states[state])

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489

else:

461

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:

473

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)

506

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

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else:

480

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

508

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

481

509

482

510

def activate(self):

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

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523

class AvahiServiceToSyslog(AvahiService):

496

524

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(

500

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

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

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530

.format(self.name)))

502

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

562

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

534

563

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):

541

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)

553

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

904

961

# key_id() and fingerprint() functions

905

962

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

906

963

.replace(" ", ""))

907

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

964

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

965

"").upper()

908

966

.replace(" ", ""))

967

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

968

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

969

" fingerprint", client_name)

970

del settings[client_name]

971

continue

909

972

if "secret" in section:

910

973

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

911

974

.encode("utf-8"),

952

1015

self.last_enabled = None

953

1016

self.expires = None

954

1017

955

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

956

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

957

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

1018

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

1019

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

1020

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

958

1021

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

959

1022

datetime.datetime.utcnow())

960

1023

988

1051

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

989

1052

# Already enabled

990

1053

return

991

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

992

1054

self.enabled = True

993

1055

self.last_enabled = datetime.datetime.utcnow()

994

1056

self.init_checker()

999

1061

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

1000

1062

return False

1001

1063

if not quiet:

1002

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

1064

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

1003

1065

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

1004

1066

GLib.source_remove(self.disable_initiator_tag)

1005

1067

self.disable_initiator_tag = None

1017

1079

def __del__(self):

1018

1080

self.disable()

1019

1081

1020

def init_checker(self):

1021

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

1022

# and every interval from then on.

1082

def init_checker(self, randomize_start=False):

1083

# Schedule a new checker to be started a randomly selected

1084

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

1085

# the startup of checkers over time when the server is

1086

# started.

1023

1087

if self.checker_initiator_tag is not None:

1024

1088

GLib.source_remove(self.checker_initiator_tag)

1089

interval_milliseconds = int(self.interval.total_seconds()

1090

* 1000)

1091

if randomize_start:

1092

delay_milliseconds = random.randrange(

1093

interval_milliseconds + 1)

1094

else:

1095

delay_milliseconds = interval_milliseconds

1025

1096

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

1097

delay_milliseconds, self.start_checker, randomize_start)

1098

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

1099

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

1100

# expire at the soonest one interval after a checker was

1101

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

1102

# time might have to be extended.

1103

now = datetime.datetime.utcnow()

1104

self.expires = now + delay + self.interval

1105

# Schedule a disable() at expire time

1029

1106

if self.disable_initiator_tag is not None:

1030

1107

GLib.source_remove(self.disable_initiator_tag)

1031

1108

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()

1109

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

1110

self.disable)

1035

1111

1036

1112

def checker_callback(self, source, condition, connection,

1037

1113

command):

1039

1115

# Read return code from connection (see call_pipe)

1040

1116

returncode = connection.recv()

1041

1117

connection.close()

1042

self.checker.join()

1118

if self.checker is not None:

1119

self.checker.join()

1043

1120

self.checker_callback_tag = None

1044

1121

self.checker = None

1045

1122

1047

1124

self.last_checker_status = returncode

1048

1125

self.last_checker_signal = None

1049

1126

if self.last_checker_status == 0:

1050

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

1051

vars(self))

1127

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

1052

1128

self.checked_ok()

1053

1129

else:

1054

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

1130

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

1055

1131

else:

1056

1132

self.last_checker_status = -1

1057

1133

self.last_checker_signal = -returncode

1058

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

1059

vars(self))

1134

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

1060

1135

return False

1061

1136

1062

1137

def checked_ok(self):

1081

1156

def need_approval(self):

1082

1157

self.last_approval_request = datetime.datetime.utcnow()

1083

1158

1084

def start_checker(self):

1159

def start_checker(self, start_was_randomized=False):

1085

1160

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

1086

1161

1087

1162

If a checker already exists, leave it running and do

1096

1171

# should be.

1097

1172

1098

1173

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

1099

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

1174

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

1100

1175

self.checker.join()

1101

1176

self.checker = None

1102

1177

# Start a new checker if needed

1103

1178

if self.checker is None:

1104

1179

# Escape attributes for the shell

1105

1180

escaped_attrs = {

1106

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

1181

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

1107

1182

for attr in self.runtime_expansions}

1108

1183

try:

1109

1184

command = self.checker_command % escaped_attrs

1110

1185

except TypeError as error:

1111

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

1112

self.checker_command,

1113

exc_info=error)

1186

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

1187

self.checker_command, exc_info=error)

1114

1188

return True # Try again later

1115

1189

self.current_checker_command = command

1116

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

1117

self.name)

1190

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

1118

1191

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

1119

1192

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

1120

1193

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

1136

1209

kwargs=popen_args)

1137

1210

self.checker.start()

1138

1211

self.checker_callback_tag = GLib.io_add_watch(

1139

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

1212

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

1213

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

1140

1214

self.checker_callback, pipe[0], command)

1215

if start_was_randomized:

1216

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

1217

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

1218

# interval from then on.

1219

now = datetime.datetime.utcnow()

1220

self.checker_initiator_tag = GLib.timeout_add(

1221

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

1222

self.start_checker)

1223

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

1224

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

1225

return False

1141

1226

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

1142

1227

return True

1143

1228

1148

1233

self.checker_callback_tag = None

1149

1234

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

1150

1235

return

1151

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

1236

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

1152

1237

self.checker.terminate()

1153

1238

self.checker = None

1154

1239

1181

1266

func._dbus_name = func.__name__

1182

1267

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

1183

1268

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

1184

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

1269

func._dbus_get_args_options = {"byte_arrays": byte_arrays}

1185

1270

return func

1186

1271

1187

1272

return decorator

1276

1361

1277

1362

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1278

1363

out_signature="s",

1279

path_keyword='object_path',

1280

connection_keyword='connection')

1364

path_keyword="object_path",

1365

connection_keyword="connection")

1281

1366

def Introspect(self, object_path, connection):

1282

1367

"""Overloading of standard D-Bus method.

1283

1368

1332

1417

document.unlink()

1333

1418

except (AttributeError, xml.dom.DOMException,

1334

1419

xml.parsers.expat.ExpatError) as error:

1335

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

1336

exc_info=error)

1420

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

1421

exc_info=error)

1337

1422

return xmlstring

1338

1423

1339

1424

1397

1482

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

1398

1483

"'ay' signature {!r}"

1399

1484

.format(prop._dbus_signature))

1400

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

1401

for byte in value))

1485

value = dbus.ByteArray(bytes(value))

1402

1486

prop(value)

1403

1487

1404

1488

@dbus.service.method(dbus.PROPERTIES_IFACE,

1437

1521

1438

1522

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1439

1523

out_signature="s",

1440

path_keyword='object_path',

1441

connection_keyword='connection')

1524

path_keyword="object_path",

1525

connection_keyword="connection")

1442

1526

def Introspect(self, object_path, connection):

1443

1527

"""Overloading of standard D-Bus method.

1444

1528

1500

1584

document.unlink()

1501

1585

except (AttributeError, xml.dom.DOMException,

1502

1586

xml.parsers.expat.ExpatError) as error:

1503

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

1504

exc_info=error)

1587

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

1588

exc_info=error)

1505

1589

return xmlstring

1506

1590

1507

1591

1539

1623

1540

1624

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1541

1625

out_signature="s",

1542

path_keyword='object_path',

1543

connection_keyword='connection')

1626

path_keyword="object_path",

1627

connection_keyword="connection")

1544

1628

def Introspect(self, object_path, connection):

1545

1629

"""Overloading of standard D-Bus method.

1546

1630

1571

1655

document.unlink()

1572

1656

except (AttributeError, xml.dom.DOMException,

1573

1657

xml.parsers.expat.ExpatError) as error:

1574

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

1575

exc_info=error)

1658

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

1659

exc_info=error)

1576

1660

return xmlstring

1577

1661

1578

1662

2209

2293

del _interface

2210

2294

2211

2295

2212

class ProxyClient(object):

2296

class ProxyClient:

2213

2297

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

2214

2298

self._pipe = child_pipe

2215

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

2299

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

2216

2300

if not self._pipe.recv():

2217

2301

raise KeyError(key_id or fpr)

2218

2302

2219

2303

def __getattribute__(self, name):

2220

if name == '_pipe':

2304

if name == "_pipe":

2221

2305

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

2222

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

2306

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

2223

2307

data = self._pipe.recv()

2224

if data[0] == 'data':

2308

if data[0] == "data":

2225

2309

return data[1]

2226

if data[0] == 'function':

2310

if data[0] == "function":

2227

2311

2228

2312

def func(*args, **kwargs):

2229

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

2313

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

2230

2314

return self._pipe.recv()[1]

2231

2315

2232

2316

return func

2233

2317

2234

2318

def __setattr__(self, name, value):

2235

if name == '_pipe':

2319

if name == "_pipe":

2236

2320

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

2237

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

2321

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

2238

2322

2239

2323

2240

2324

class ClientHandler(socketserver.BaseRequestHandler, object):

2245

2329

2246

2330

def handle(self):

2247

2331

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())

2332

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

2333

str(self.client_address))

2334

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

2252

2335

2253

2336

session = gnutls.ClientSession(self.request)

2254

2337

2255

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

2338

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

2256

2339

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

2257

2340

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

2258

2341

# "+DHE-DSS"))

2260

2343

priority = self.server.gnutls_priority

2261

2344

if priority is None:

2262

2345

priority = "NORMAL"

2263

gnutls.priority_set_direct(session._c_object,

2264

priority.encode("utf-8"),

2265

None)

2346

gnutls.priority_set_direct(session,

2347

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

2266

2348

2267

2349

# Start communication using the Mandos protocol

2268

2350

# Get protocol number

2269

2351

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

2270

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

2352

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

2271

2353

try:

2272

2354

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

2273

2355

raise RuntimeError(line)

2274

2356

except (ValueError, IndexError, RuntimeError) as error:

2275

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

2357

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

2276

2358

return

2277

2359

2278

2360

# Start GnuTLS connection

2279

2361

try:

2280

2362

session.handshake()

2281

2363

except gnutls.Error as error:

2282

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

2364

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

2283

2365

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

2284

2366

# established. Just abandon the request.

2285

2367

return

2286

logger.debug("Handshake succeeded")

2368

log.debug("Handshake succeeded")

2287

2369

2288

2370

approval_required = False

2289

2371

try:

2293

2375

key_id = self.key_id(

2294

2376

self.peer_certificate(session))

2295

2377

except (TypeError, gnutls.Error) as error:

2296

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

2378

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

2297

2379

return

2298

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

2380

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

2381

key_id.decode("utf-8",

2382

errors="replace"))

2299

2383

2300

2384

else:

2301

2385

key_id = b""

2303

2387

fpr = self.fingerprint(

2304

2388

self.peer_certificate(session))

2305

2389

except (TypeError, gnutls.Error) as error:

2306

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

2390

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

2307

2391

return

2308

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

2392

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

2309

2393

2310

2394

try:

2311

2395

client = ProxyClient(child_pipe, key_id, fpr,

2320

2404

2321

2405

while True:

2322

2406

if not client.enabled:

2323

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

2324

client.name)

2407

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

2325

2408

if self.server.use_dbus:

2326

2409

# Emit D-Bus signal

2327

2410

client.Rejected("Disabled")

2331

2414

# We are approved or approval is disabled

2332

2415

break

2333

2416

elif client.approved is None:

2334

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

2335

client.name)

2417

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

2418

client.name)

2336

2419

if self.server.use_dbus:

2337

2420

# Emit D-Bus signal

2338

2421

client.NeedApproval(

2339

2422

client.approval_delay.total_seconds()

2340

2423

* 1000, client.approved_by_default)

2341

2424

else:

2342

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

2343

client.name)

2425

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

2426

client.name)

2344

2427

if self.server.use_dbus:

2345

2428

# Emit D-Bus signal

2346

2429

client.Rejected("Denied")

2354

2437

time2 = datetime.datetime.now()

2355

2438

if (time2 - time) >= delay:

2356

2439

if not client.approved_by_default:

2357

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

2358

" waiting for approval",

2359

client.name)

2440

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

2441

" waiting for approval",

2442

client.name)

2360

2443

if self.server.use_dbus:

2361

2444

# Emit D-Bus signal

2362

2445

client.Rejected("Approval timed out")

2369

2452

try:

2370

2453

session.send(client.secret)

2371

2454

except gnutls.Error as error:

2372

logger.warning("gnutls send failed",

2373

exc_info=error)

2455

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

2374

2456

return

2375

2457

2376

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

2458

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

2377

2459

# bump the timeout using extended_timeout

2378

2460

client.bump_timeout(client.extended_timeout)

2379

2461

if self.server.use_dbus:

2386

2468

try:

2387

2469

session.bye()

2388

2470

except gnutls.Error as error:

2389

logger.warning("GnuTLS bye failed",

2390

exc_info=error)

2471

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

2391

2472

2392

2473

@staticmethod

2393

2474

def peer_certificate(session):

2394

2475

"Return the peer's certificate as a bytestring"

2395

2476

try:

2396

cert_type = gnutls.certificate_type_get2(session._c_object,

2397

gnutls.CTYPE_PEERS)

2477

cert_type = gnutls.certificate_type_get2(

2478

session, gnutls.CTYPE_PEERS)

2398

2479

except AttributeError:

2399

cert_type = gnutls.certificate_type_get(session._c_object)

2480

cert_type = gnutls.certificate_type_get(session)

2400

2481

if gnutls.has_rawpk:

2401

2482

valid_cert_types = frozenset((gnutls.CRT_RAWPK,))

2402

2483

else:

2403

2484

valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))

2404

2485

# If not a valid certificate type...

2405

2486

if cert_type not in valid_cert_types:

2406

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

2407

valid_cert_types)

2487

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

2488

valid_cert_types)

2408

2489

# ...return invalid data

2409

2490

return b""

2410

2491

list_size = ctypes.c_uint(1)

2411

2492

cert_list = (gnutls.certificate_get_peers

2412

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

2493

(session, ctypes.byref(list_size)))

2413

2494

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

2414

2495

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

2415

2496

if list_size.value == 0:

2437

2518

buf = ctypes.create_string_buffer(32)

2438

2519

buf_len = ctypes.c_size_t(len(buf))

2439

2520

# 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))

2521

gnutls.pubkey_get_key_id(

2522

pubkey,

2523

gnutls.KEYID_USE_SHA256,

2524

ctypes.cast(ctypes.byref(buf),

2525

ctypes.POINTER(ctypes.c_ubyte)),

2526

ctypes.byref(buf_len))

2445

2527

# Deinit the certificate

2446

2528

gnutls.pubkey_deinit(pubkey)

2447

2529

2488

2570

return hex_fpr

2489

2571

2490

2572

2491

class MultiprocessingMixIn(object):

2573

class MultiprocessingMixIn:

2492

2574

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

2493

2575

2494

2576

def sub_process_main(self, request, address):

2506

2588

return proc

2507

2589

2508

2590

2509

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2591

class MultiprocessingMixInWithPipe(MultiprocessingMixIn):

2510

2592

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

2511

2593

2512

2594

def process_request(self, request, client_address):

2527

2609

2528

2610

2529

2611

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2530

socketserver.TCPServer, object):

2531

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

2612

socketserver.TCPServer):

2613

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

2532

2614

2533

2615

Attributes:

2534

2616

enabled: Boolean; whether this server is activated yet

2585

2667

if SO_BINDTODEVICE is None:

2586

2668

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

2587

2669

# common enough.

2588

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

2670

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

2589

2671

SO_BINDTODEVICE = 25

2590

2672

try:

2591

2673

self.socket.setsockopt(

2593

2675

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

2594

2676

except socket.error as error:

2595

2677

if error.errno == errno.EPERM:

2596

logger.error("No permission to bind to"

2597

" interface %s", self.interface)

2678

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

2679

self.interface)

2598

2680

elif error.errno == errno.ENOPROTOOPT:

2599

logger.error("SO_BINDTODEVICE not available;"

2600

" cannot bind to interface %s",

2601

self.interface)

2681

log.error("SO_BINDTODEVICE not available; cannot"

2682

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

2602

2683

elif error.errno == errno.ENODEV:

2603

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

2604

" cannot bind", self.interface)

2684

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

2685

" bind", self.interface)

2605

2686

else:

2606

2687

raise

2607

2688

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

2666

2747

def add_pipe(self, parent_pipe, proc):

2667

2748

# Call "handle_ipc" for both data and EOF events

2668

2749

GLib.io_add_watch(

2669

parent_pipe.fileno(),

2670

GLib.IO_IN | GLib.IO_HUP,

2750

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

2751

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

2671

2752

functools.partial(self.handle_ipc,

2672

2753

parent_pipe=parent_pipe,

2673

2754

proc=proc))

2686

2767

request = parent_pipe.recv()

2687

2768

command = request[0]

2688

2769

2689

if command == 'init':

2770

if command == "init":

2690

2771

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

2691

2772

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

2692

2773

address = request[3]

2693

2774

2694

2775

for c in self.clients.values():

2695

if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":

2776

if key_id == ("E3B0C44298FC1C149AFBF4C8996FB924"

2777

"27AE41E4649B934CA495991B7852B855"):

2696

2778

continue

2697

2779

if key_id and c.key_id == key_id:

2698

2780

client = c

2701

2783

client = c

2702

2784

break

2703

2785

else:

2704

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

2705

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

2786

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

2787

" %s", key_id or fpr, address)

2706

2788

if self.use_dbus:

2707

2789

# Emit D-Bus signal

2708

2790

mandos_dbus_service.ClientNotFound(key_id or fpr,

2711

2793

return False

2712

2794

2713

2795

GLib.io_add_watch(

2714

parent_pipe.fileno(),

2715

GLib.IO_IN | GLib.IO_HUP,

2796

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

2797

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

2716

2798

functools.partial(self.handle_ipc,

2717

2799

parent_pipe=parent_pipe,

2718

2800

proc=proc,

2721

2803

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

2722

2804

# same fileno

2723

2805

return False

2724

if command == 'funcall':

2806

if command == "funcall":

2725

2807

funcname = request[1]

2726

2808

args = request[2]

2727

2809

kwargs = request[3]

2728

2810

2729

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

2811

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

2730

2812

funcname)(*args,

2731

2813

**kwargs)))

2732

2814

2733

if command == 'getattr':

2815

if command == "getattr":

2734

2816

attrname = request[1]

2735

2817

if isinstance(client_object.__getattribute__(attrname),

2736

collections.Callable):

2737

parent_pipe.send(('function', ))

2818

collections.abc.Callable):

2819

parent_pipe.send(("function", ))

2738

2820

else:

2739

2821

parent_pipe.send((

2740

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

2822

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

2741

2823

2742

if command == 'setattr':

2824

if command == "setattr":

2743

2825

attrname = request[1]

2744

2826

value = request[2]

2745

2827

setattr(client_object, attrname, value)

2750

2832

def rfc3339_duration_to_delta(duration):

2751

2833

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

2752

2834

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)

2835

>>> timedelta = datetime.timedelta

2836

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

2837

True

2838

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

2839

True

2840

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

2841

True

2842

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

2843

True

2844

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

2845

True

2846

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

2847

True

2848

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

2849

True

2850

>>> del timedelta

2767

2851

"""

2768

2852

2769

2853

# Parsing an RFC 3339 duration with regular expressions is not

2849

2933

def string_to_delta(interval):

2850

2934

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

2851

2935

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)

2936

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

2937

True

2938

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

2939

True

2940

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

2941

True

2942

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

2943

True

2944

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

2945

True

2946

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

2947

True

2864

2948

"""

2865

2949

2866

2950

try:

2968

3052

2969

3053

options = parser.parse_args()

2970

3054

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

3055

# Default values for config file for server-global settings

2977

3056

if gnutls.has_rawpk:

2978

3057

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

2998

3077

del priority

2999

3078

3000

3079

# Parse config file for server-global settings

3001

server_config = configparser.SafeConfigParser(server_defaults)

3080

server_config = configparser.ConfigParser(server_defaults)

3002

3081

del server_defaults

3003

3082

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

3004

# Convert the SafeConfigParser object to a dict

3083

# Convert the ConfigParser object to a dict

3005

3084

server_settings = server_config.defaults()

3006

3085

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

3007

3086

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

3074

3153

3075

3154

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

3076

3155

syslogger.setFormatter(

3077

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

3078

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

3156

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

3157

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

3079

3158

server_settings["servicename"])))

3080

3159

3081

3160

# Parse config file with clients

3082

client_config = configparser.SafeConfigParser(Client

3083

.client_defaults)

3161

client_config = configparser.ConfigParser(Client.client_defaults)

3084

3162

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

3085

3163

"clients.conf"))

3086

3164

3106

3184

try:

3107

3185

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

3108

3186

except IOError as e:

3109

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

3110

exc_info=e)

3187

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

3188

exc_info=e)

3111

3189

3112

3190

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

3113

3191

("mandos", "mandos"),

3124

3202

try:

3125

3203

os.setgid(gid)

3126

3204

os.setuid(uid)

3127

if debug:

3128

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

3129

gid))

3205

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

3130

3206

except OSError as error:

3131

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

3132

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

3207

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

3208

os.strerror(error.errno))

3133

3209

if error.errno != errno.EPERM:

3134

3210

raise

3135

3211

3142

3218

3143

3219

@gnutls.log_func

3144

3220

def debug_gnutls(level, string):

3145

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

3221

log.debug("GnuTLS: %s",

3222

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

3146

3223

3147

3224

gnutls.global_set_log_function(debug_gnutls)

3148

3225

3157

3234

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

3158

3235

daemon()

3159

3236

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()

3237

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

3238

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

3239

# need to inform GLib that threads will be used.

3240

GLib.threads_init()

3163

3241

3164

3242

global main_loop

3165

3243

# From the Avahi example code

3166

3244

DBusGMainLoop(set_as_default=True)

3167

3245

main_loop = GLib.MainLoop()

3168

bus = dbus.SystemBus()

3246

if use_dbus or zeroconf:

3247

bus = dbus.SystemBus()

3169

3248

# End of Avahi example code

3170

3249

if use_dbus:

3171

3250

try:

3176

3255

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

3177

3256

do_not_queue=True)

3178

3257

except dbus.exceptions.DBusException as e:

3179

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

3258

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

3180

3259

use_dbus = False

3181

3260

server_settings["use_dbus"] = False

3182

3261

tcp_server.use_dbus = False

3241

3320

if isinstance(s, bytes)

3242

3321

else s) for s in

3243

3322

value["client_structure"]]

3244

# .name & .host

3245

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

3323

# .name, .host, and .checker_command

3324

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

3246

3325

if isinstance(value[k], bytes):

3247

3326

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

3248

3327

if "key_id" not in value:

3258

3337

for key, value in

3259

3338

bytes_old_client_settings.items()}

3260

3339

del bytes_old_client_settings

3261

# .host

3340

# .host and .checker_command

3262

3341

for value in old_client_settings.values():

3263

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

3264

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

3265

.decode("utf-8"))

3342

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

3343

if isinstance(value[attribute], bytes):

3344

value[attribute] = (value[attribute]

3345

.decode("utf-8"))

3266

3346

os.remove(stored_state_path)

3267

3347

except IOError as e:

3268

3348

if e.errno == errno.ENOENT:

3269

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

3270

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

3349

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

3350

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

3271

3351

else:

3272

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

3273

exc_info=e)

3352

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

3353

exc_info=e)

3274

3354

raise

3275

3355

except EOFError as e:

3276

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

3277

"EOFError:",

3278

exc_info=e)

3356

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

3357

exc_info=e)

3279

3358

3280

3359

with PGPEngine() as pgp:

3281

3360

for client_name, client in clients_data.items():

3308

3387

if client["enabled"]:

3309

3388

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

3310

3389

if not client["last_checked_ok"]:

3311

logger.warning(

3312

"disabling client {} - Client never "

3313

"performed a successful checker".format(

3314

client_name))

3390

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

3391

" never performed a successful"

3392

" checker", client_name)

3315

3393

client["enabled"] = False

3316

3394

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"]))

3395

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

3396

" last checker failed with error"

3397

" code %s", client_name,

3398

client["last_checker_status"])

3323

3399

client["enabled"] = False

3324

3400

else:

3325

3401

client["expires"] = (

3326

3402

datetime.datetime.utcnow()

3327

3403

+ client["timeout"])

3328

logger.debug("Last checker succeeded,"

3329

" keeping {} enabled".format(

3330

client_name))

3404

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

3405

" enabled", client_name)

3331

3406

try:

3332

3407

client["secret"] = pgp.decrypt(

3333

3408

client["encrypted_secret"],

3334

3409

client_settings[client_name]["secret"])

3335

3410

except PGPError:

3336

3411

# If decryption fails, we use secret from new settings

3337

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

3338

client_name))

3412

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

3413

client_name)

3339

3414

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

3340

3415

["secret"])

3341

3416

3355

3430

server_settings=server_settings)

3356

3431

3357

3432

if not tcp_server.clients:

3358

logger.warning("No clients defined")

3433

log.warning("No clients defined")

3359

3434

3360

3435

if not foreground:

3361

3436

if pidfile is not None:

3364

3439

with pidfile:

3365

3440

print(pid, file=pidfile)

3366

3441

except IOError:

3367

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

3368

pidfilename, pid)

3442

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

3443

pidfilename, pid)

3369

3444

del pidfile

3370

3445

del pidfilename

3371

3446

3521

3596

3522

3597

try:

3523

3598

with tempfile.NamedTemporaryFile(

3524

mode='wb',

3599

mode="wb",

3525

3600

suffix=".pickle",

3526

prefix='clients-',

3601

prefix="clients-",

3527

3602

dir=os.path.dirname(stored_state_path),

3528

3603

delete=False) as stored_state:

3529

3604

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

3537

3612

except NameError:

3538

3613

pass

3539

3614

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

3540

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

3541

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

3615

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

3616

os.strerror(e.errno))

3542

3617

else:

3543

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

3544

exc_info=e)

3618

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

3619

exc_info=e)

3545

3620

raise

3546

3621

3547

3622

# Delete all clients, and settings from config

3564

3639

mandos_dbus_service.client_added_signal(client)

3565

3640

# Need to initiate checking of clients

3566

3641

if client.enabled:

3567

client.init_checker()

3642

client.init_checker(randomize_start=True)

3568

3643

3569

3644

tcp_server.enable()

3570

3645

tcp_server.server_activate()

3573

3648

if zeroconf:

3574

3649

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

3575

3650

if use_ipv6:

3576

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

3577

" flowinfo %d, scope_id %d",

3578

*tcp_server.socket.getsockname())

3651

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

3652

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

3579

3653

else: # IPv4

3580

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

3581

*tcp_server.socket.getsockname())

3654

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

3655

*tcp_server.socket.getsockname())

3582

3656

3583

3657

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

3584

3658

3588

3662

try:

3589

3663

service.activate()

3590

3664

except dbus.exceptions.DBusException as error:

3591

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

3665

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

3592

3666

cleanup()

3593

3667

sys.exit(1)

3594

3668

# End of Avahi example code

3595

3669

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))

3670

GLib.io_add_watch(

3671

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

3672

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

3673

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

3674

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

3600

3675

3601

logger.debug("Starting main loop")

3676

log.debug("Starting main loop")

3602

3677

main_loop.run()

3603

3678

except AvahiError as error:

3604

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

3679

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

3605

3680

cleanup()

3606

3681

sys.exit(1)

3607

3682

except KeyboardInterrupt:

3608

3683

if debug:

3609

3684

print("", file=sys.stderr)

3610

logger.debug("Server received KeyboardInterrupt")

3611

logger.debug("Server exiting")

3685

log.debug("Server received KeyboardInterrupt")

3686

log.debug("Server exiting")

3612

3687

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

3613

3688

cleanup()

3614

3689

3615

3616

if __name__ == '__main__':

3617

main()

3690

3691

def parse_test_args():

3692

# type: () -> argparse.Namespace

3693

parser = argparse.ArgumentParser(add_help=False)

3694

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

3695

parser.add_argument("--prefix", )

3696

args, unknown_args = parser.parse_known_args()

3697

if args.check:

3698

# Remove test options from sys.argv

3699

sys.argv[1:] = unknown_args

3700

return args

3701

3702

# Add all tests from doctest strings

3703

def load_tests(loader, tests, none):

3704

import doctest

3705

tests.addTests(doctest.DocTestSuite())

3706

return tests

3707

3708

if __name__ == "__main__":

3709

options = parse_test_args()

3710

try:

3711

if options.check:

3712

extra_test_prefix = options.prefix

3713

if extra_test_prefix is not None:

3714

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

3715

.result.wasSuccessful()):

3716

sys.exit(1)

3717

class ExtraTestLoader(unittest.TestLoader):

3718

testMethodPrefix = extra_test_prefix

3719

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

3720

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

3721

else:

3722

unittest.main(argv=[""])

3723

else:

3724

main()

3725

finally:

3726

logging.shutdown()

3727

3728

# Local Variables:

3729

# run-tests:

3730

# (lambda (&optional extra)

3731

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

3732

# extra))

3733

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

3734

# (funcall remove-test-window)

3735

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

3736

# run-tests-in-test-buffer:

3737

# (lambda (dir &optional extra)

3738

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

3739

# (setq buffer-read-only nil

3740

# default-directory dir)

3741

# (erase-buffer)

3742

# (compilation-mode))

3743

# (let ((process-result

3744

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

3745

# (process-file-shell-command

3746

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

3747

# (and (numberp process-result)

3748

# (= process-result 0))))

3749

# get-command-line:

3750

# (lambda (&optional extra)

3751

# (let ((quoted-script

3752

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

3753

# (format

3754

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

3755

# quoted-script)))

3756

# get-script-name:

3757

# (lambda ()

3758

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

3759

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

3760

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

3761

# (buffer-file-name))))

3762

# remove-test-window:

3763

# (lambda ()

3764

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

3765

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

3766

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

3767

# (lambda ()

3768

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

3769

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

3770

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

3771

# (display-buffer-overriding-action

3772

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

3773

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

3774

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

3775

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

3776

# eval:

3777

# (progn

3778

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

3779

# (funcall run-tests t)))

3780

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

3781

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

3782

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

3783

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

3784

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

3785

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

3786

# End: