/mandos/trunk : revision 1097

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#!/usr/bin/python3 -bI

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

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#!/usr/bin/python

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

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#

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# Mandos server - give out binary blobs to connecting clients.

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#

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# "AvahiService" class, and some lines in "main".

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#

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# Everything else is

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#

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# This file is part of Mandos.

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#

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#

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# Contact the authors at <mandos@recompile.se>.

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#

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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except ImportError:

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pass

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import sys

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import unittest

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import argparse

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import logging

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import os

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try:

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import SocketServer as socketserver

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except ImportError:

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import socketserver

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import socket

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import argparse

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import datetime

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import errno

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try:

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import ConfigParser as configparser

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except ImportError:

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import configparser

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import sys

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import re

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import os

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import signal

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import subprocess

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import atexit

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import stat

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import logging

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import logging.handlers

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import pwd

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import contextlib

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import itertools

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import collections

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import codecs

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import random

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import shlex

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import dbus

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import dbus.service

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import gi

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from gi.repository import GLib

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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import xml.dom.minidom

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import inspect

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if sys.version_info.major == 2:

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__metaclass__ = type

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str = unicode

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input = raw_input

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# Add collections.abc.Callable if it does not exist

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try:

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collections.abc.Callable

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except AttributeError:

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class abc:

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Callable = collections.Callable

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collections.abc = abc

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del abc

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# Add shlex.quote if it does not exist

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try:

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shlex.quote

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except AttributeError:

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shlex.quote = re.escape

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# Show warnings by default

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if not sys.warnoptions:

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import warnings

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warnings.simplefilter("default")

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# Try to find the value of SO_BINDTODEVICE:

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try:

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# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and

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# No value found

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SO_BINDTODEVICE = None

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if sys.version_info < (3, 2):

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configparser.Configparser = configparser.SafeConfigParser

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if sys.version_info.major == 2:

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str = unicode

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version = "1.8.16"

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version = "1.8.3"

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stored_state_file = "clients.pickle"

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log = logging.getLogger(os.path.basename(sys.argv[0]))

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logging.captureWarnings(True) # Show warnings via the logging system

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logger = logging.getLogger()

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syslogger = None

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try:

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facility=logging.handlers.SysLogHandler.LOG_DAEMON,

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address="/dev/log"))

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syslogger.setFormatter(logging.Formatter

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

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" %(message)s"))

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log.addHandler(syslogger)

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

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' %(message)s'))

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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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console.setFormatter(logging.Formatter("%(asctime)s %(name)s"

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" [%(process)d]:"

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" %(levelname)s:"

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" %(message)s"))

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log.addHandler(console)

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log.setLevel(level)

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console.setFormatter(logging.Formatter('%(asctime)s %(name)s'

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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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logger.setLevel(level)

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class PGPError(Exception):

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pass

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class PGPEngine:

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class PGPEngine(object):

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"""A simple class for OpenPGP symmetric encryption & decryption"""

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def __init__(self):

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output = subprocess.check_output(["gpgconf"])

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for line in output.splitlines():

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name, text, path = line.split(b":")

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if name == b"gpg":

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if name == "gpg":

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self.gpg = path

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break

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except OSError as e:

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if e.errno != errno.ENOENT:

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raise

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self.gnupgargs = ["--batch",

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"--homedir", self.tempdir,

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"--force-mdc",

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"--quiet"]

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self.gnupgargs = ['--batch',

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'--homedir', self.tempdir,

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'--force-mdc',

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'--quiet']

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# Only GPG version 1 has the --no-use-agent option.

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

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

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self.gnupgargs.append("--no-use-agent")

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def __enter__(self):

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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proc = subprocess.Popen([self.gpg, "--symmetric",

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"--passphrase-file",

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proc = subprocess.Popen([self.gpg, '--symmetric',

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin=subprocess.PIPE,

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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proc = subprocess.Popen([self.gpg, "--decrypt",

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"--passphrase-file",

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proc = subprocess.Popen([self.gpg, '--decrypt',

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin=subprocess.PIPE,

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# Pretend that we have an Avahi module

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class avahi:

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class avahi(object):

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

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IF_UNSPEC = -1 # avahi-common/address.h

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PROTO_UNSPEC = -1 # avahi-common/address.h

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pass

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class AvahiService:

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class AvahiService(object):

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"""An Avahi (Zeroconf) service.

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Attributes:

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interface: integer; avahi.IF_UNSPEC or an interface index.

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Used to optionally bind to the specified interface.

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name: string; Example: "Mandos"

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type: string; Example: "_mandos._tcp".

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name: string; Example: 'Mandos'

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type: string; Example: '_mandos._tcp'.

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See <https://www.iana.org/assignments/service-names-port-numbers>

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port: integer; what port to announce

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TXT: list of strings; TXT record for the service

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def rename(self, remove=True):

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

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if self.rename_count >= self.max_renames:

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log.critical("No suitable Zeroconf service name found"

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" after %i retries, exiting.",

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self.rename_count)

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logger.critical("No suitable Zeroconf service name found"

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" after %i retries, exiting.",

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self.rename_count)

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raise AvahiServiceError("Too many renames")

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self.name = str(

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self.server.GetAlternativeServiceName(self.name))

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self.rename_count += 1

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

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self.name)

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

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self.name)

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if remove:

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self.remove()

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try:

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except dbus.exceptions.DBusException as error:

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if (error.get_dbus_name()

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== "org.freedesktop.Avahi.CollisionError"):

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

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

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return self.rename(remove=False)

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else:

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

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

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self.cleanup()

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os._exit(1)

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avahi.DBUS_INTERFACE_ENTRY_GROUP)

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self.entry_group_state_changed_match = (

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self.group.connect_to_signal(

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"StateChanged", self.entry_group_state_changed))

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

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self.name, self.type)

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'StateChanged', self.entry_group_state_changed))

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

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self.name, self.type)

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self.group.AddService(

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self.interface,

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self.protocol,

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def entry_group_state_changed(self, state, error):

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

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

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

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if state == avahi.ENTRY_GROUP_ESTABLISHED:

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log.debug("Zeroconf service established.")

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logger.debug("Zeroconf service established.")

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elif state == avahi.ENTRY_GROUP_COLLISION:

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

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

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self.rename()

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elif state == avahi.ENTRY_GROUP_FAILURE:

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

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str(error))

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

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str(error))

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raise AvahiGroupError("State changed: {!s}".format(error))

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def cleanup(self):

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def server_state_changed(self, state, error=None):

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

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

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

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bad_states = {

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avahi.SERVER_INVALID: "Zeroconf server invalid",

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avahi.SERVER_REGISTERING: None,

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if state in bad_states:

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if bad_states[state] is not None:

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if error is None:

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log.error(bad_states[state])

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logger.error(bad_states[state])

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else:

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

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

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self.cleanup()

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elif state == avahi.SERVER_RUNNING:

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try:

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except dbus.exceptions.DBusException as error:

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if (error.get_dbus_name()

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== "org.freedesktop.Avahi.CollisionError"):

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

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logger.info("Local Zeroconf service name"

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" collision.")

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return self.rename(remove=False)

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else:

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

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

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self.cleanup()

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os._exit(1)

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else:

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if error is None:

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

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

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else:

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

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

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def activate(self):

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

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class AvahiServiceToSyslog(AvahiService):

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

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

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

527

**kwargs)

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

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syslogger.setFormatter(logging.Formatter(

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

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

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.format(self.name)))

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return ret

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# Pretend that we have a GnuTLS module

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class gnutls:

506

class gnutls(object):

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

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

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OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

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534

564

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# Types

565

class _session_int(ctypes.Structure):

536

class session_int(ctypes.Structure):

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_fields_ = []

567

session_t = ctypes.POINTER(_session_int)

538

session_t = ctypes.POINTER(session_int)

568

539

569

540

class certificate_credentials_st(ctypes.Structure):

570

541

_fields_ = []

573

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certificate_type_t = ctypes.c_int

574

545

575

546

class datum_t(ctypes.Structure):

576

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

577

("size", ctypes.c_uint)]

547

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

548

('size', ctypes.c_uint)]

578

549

579

class _openpgp_crt_int(ctypes.Structure):

550

class openpgp_crt_int(ctypes.Structure):

580

551

_fields_ = []

581

openpgp_crt_t = ctypes.POINTER(_openpgp_crt_int)

552

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

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553

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

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554

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

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credentials_type_t = ctypes.c_int

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564

# gnutls.strerror()

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self.code = code

595

566

if message is None and code is not None:

596

message = gnutls.strerror(code).decode(

597

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

567

message = gnutls.strerror(code)

598

568

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

599

569

message, *args)

600

570

601

571

class CertificateSecurityError(Error):

602

572

pass

603

573

604

class PointerTo:

605

def __init__(self, cls):

606

self.cls = cls

607

608

def from_param(self, obj):

609

if not isinstance(obj, self.cls):

610

raise TypeError("Not of type {}: {!r}"

611

.format(self.cls.__name__, obj))

612

return ctypes.byref(obj.from_param(obj))

613

614

class CastToVoidPointer:

615

def __init__(self, cls):

616

self.cls = cls

617

618

def from_param(self, obj):

619

if not isinstance(obj, self.cls):

620

raise TypeError("Not of type {}: {!r}"

621

.format(self.cls.__name__, obj))

622

return ctypes.cast(obj.from_param(obj), ctypes.c_void_p)

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624

class With_from_param:

625

@classmethod

626

def from_param(cls, obj):

627

return obj._as_parameter_

628

629

574

# Classes

630

class Credentials(With_from_param):

575

class Credentials(object):

631

576

def __init__(self):

632

self._as_parameter_ = gnutls.certificate_credentials_t()

633

gnutls.certificate_allocate_credentials(self)

577

self._c_object = gnutls.certificate_credentials_t()

578

gnutls.certificate_allocate_credentials(

579

ctypes.byref(self._c_object))

634

580

self.type = gnutls.CRD_CERTIFICATE

635

581

636

582

def __del__(self):

637

gnutls.certificate_free_credentials(self)

583

gnutls.certificate_free_credentials(self._c_object)

638

584

639

class ClientSession(With_from_param):

585

class ClientSession(object):

640

586

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

641

self._as_parameter_ = gnutls.session_t()

587

self._c_object = gnutls.session_t()

642

588

gnutls_flags = gnutls.CLIENT

643

if gnutls.check_version(b"3.5.6"):

589

if gnutls.check_version("3.5.6"):

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590

gnutls_flags |= gnutls.NO_TICKETS

645

591

if gnutls.has_rawpk:

646

592

gnutls_flags |= gnutls.ENABLE_RAWPK

647

gnutls.init(self, gnutls_flags)

593

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

648

594

del gnutls_flags

649

gnutls.set_default_priority(self)

650

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

651

gnutls.handshake_set_private_extensions(self, True)

595

gnutls.set_default_priority(self._c_object)

596

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

597

gnutls.handshake_set_private_extensions(self._c_object,

598

True)

652

599

self.socket = socket

653

600

if credentials is None:

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601

credentials = gnutls.Credentials()

655

gnutls.credentials_set(self, credentials.type,

656

credentials)

602

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

603

ctypes.cast(credentials._c_object,

604

ctypes.c_void_p))

657

605

self.credentials = credentials

658

606

659

607

def __del__(self):

660

gnutls.deinit(self)

608

gnutls.deinit(self._c_object)

661

609

662

610

def handshake(self):

663

return gnutls.handshake(self)

611

return gnutls.handshake(self._c_object)

664

612

665

613

def send(self, data):

666

614

data = bytes(data)

667

615

data_len = len(data)

668

616

while data_len > 0:

669

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

617

data_len -= gnutls.record_send(self._c_object,

618

data[-data_len:],

670

619

data_len)

671

620

672

621

def bye(self):

673

return gnutls.bye(self, gnutls.SHUT_RDWR)

622

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

674

623

675

624

# Error handling functions

676

625

def _error_code(result):

677

626

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

678

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

679

if result >= gnutls.E_SUCCESS:

627

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

628

if result >= 0:

680

629

return result

681

630

if result == gnutls.E_NO_CERTIFICATE_FOUND:

682

631

raise gnutls.CertificateSecurityError(code=result)

683

632

raise gnutls.Error(code=result)

684

633

685

def _retry_on_error(result, func, arguments,

686

_error_code=_error_code):

634

def _retry_on_error(result, func, arguments):

687

635

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

688

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

689

while result < gnutls.E_SUCCESS:

636

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

637

while result < 0:

690

638

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

691

639

return _error_code(result)

692

640

result = func(*arguments)

697

645

698

646

# Functions

699

647

priority_set_direct = _library.gnutls_priority_set_direct

700

priority_set_direct.argtypes = [ClientSession, ctypes.c_char_p,

648

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

701

649

ctypes.POINTER(ctypes.c_char_p)]

702

650

priority_set_direct.restype = _error_code

703

651

704

652

init = _library.gnutls_init

705

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

653

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

706

654

init.restype = _error_code

707

655

708

656

set_default_priority = _library.gnutls_set_default_priority

709

set_default_priority.argtypes = [ClientSession]

657

set_default_priority.argtypes = [session_t]

710

658

set_default_priority.restype = _error_code

711

659

712

660

record_send = _library.gnutls_record_send

713

record_send.argtypes = [ClientSession, ctypes.c_void_p,

661

record_send.argtypes = [session_t, ctypes.c_void_p,

714

662

ctypes.c_size_t]

715

663

record_send.restype = ctypes.c_ssize_t

716

664

record_send.errcheck = _retry_on_error

718

666

certificate_allocate_credentials = (

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667

_library.gnutls_certificate_allocate_credentials)

720

668

certificate_allocate_credentials.argtypes = [

721

PointerTo(Credentials)]

669

ctypes.POINTER(certificate_credentials_t)]

722

670

certificate_allocate_credentials.restype = _error_code

723

671

724

672

certificate_free_credentials = (

725

673

_library.gnutls_certificate_free_credentials)

726

certificate_free_credentials.argtypes = [Credentials]

674

certificate_free_credentials.argtypes = [

675

certificate_credentials_t]

727

676

certificate_free_credentials.restype = None

728

677

729

678

handshake_set_private_extensions = (

730

679

_library.gnutls_handshake_set_private_extensions)

731

handshake_set_private_extensions.argtypes = [ClientSession,

680

handshake_set_private_extensions.argtypes = [session_t,

732

681

ctypes.c_int]

733

682

handshake_set_private_extensions.restype = None

734

683

735

684

credentials_set = _library.gnutls_credentials_set

736

credentials_set.argtypes = [ClientSession, credentials_type_t,

737

CastToVoidPointer(Credentials)]

685

credentials_set.argtypes = [session_t, credentials_type_t,

686

ctypes.c_void_p]

738

687

credentials_set.restype = _error_code

739

688

740

689

strerror = _library.gnutls_strerror

742

691

strerror.restype = ctypes.c_char_p

743

692

744

693

certificate_type_get = _library.gnutls_certificate_type_get

745

certificate_type_get.argtypes = [ClientSession]

694

certificate_type_get.argtypes = [session_t]

746

695

certificate_type_get.restype = _error_code

747

696

748

697

certificate_get_peers = _library.gnutls_certificate_get_peers

749

certificate_get_peers.argtypes = [ClientSession,

698

certificate_get_peers.argtypes = [session_t,

750

699

ctypes.POINTER(ctypes.c_uint)]

751

700

certificate_get_peers.restype = ctypes.POINTER(datum_t)

752

701

759

708

global_set_log_function.restype = None

760

709

761

710

deinit = _library.gnutls_deinit

762

deinit.argtypes = [ClientSession]

711

deinit.argtypes = [session_t]

763

712

deinit.restype = None

764

713

765

714

handshake = _library.gnutls_handshake

766

handshake.argtypes = [ClientSession]

767

handshake.restype = ctypes.c_int

715

handshake.argtypes = [session_t]

716

handshake.restype = _error_code

768

717

handshake.errcheck = _retry_on_error

769

718

770

719

transport_set_ptr = _library.gnutls_transport_set_ptr

771

transport_set_ptr.argtypes = [ClientSession, transport_ptr_t]

720

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

772

721

transport_set_ptr.restype = None

773

722

774

723

bye = _library.gnutls_bye

775

bye.argtypes = [ClientSession, close_request_t]

776

bye.restype = ctypes.c_int

724

bye.argtypes = [session_t, close_request_t]

725

bye.restype = _error_code

777

726

bye.errcheck = _retry_on_error

778

727

779

728

check_version = _library.gnutls_check_version

796

745

797

746

x509_crt_fmt_t = ctypes.c_int

798

747

799

# All the function declarations below are from

800

# gnutls/abstract.h

748

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

801

749

pubkey_init = _library.gnutls_pubkey_init

802

750

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

803

751

pubkey_init.restype = _error_code

817

765

pubkey_deinit.argtypes = [pubkey_t]

818

766

pubkey_deinit.restype = None

819

767

else:

820

# All the function declarations below are from

821

# gnutls/openpgp.h

768

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

822

769

823

770

openpgp_crt_init = _library.gnutls_openpgp_crt_init

824

771

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

830

777

openpgp_crt_fmt_t]

831

778

openpgp_crt_import.restype = _error_code

832

779

833

openpgp_crt_verify_self = \

834

_library.gnutls_openpgp_crt_verify_self

835

openpgp_crt_verify_self.argtypes = [

836

openpgp_crt_t,

837

ctypes.c_uint,

838

ctypes.POINTER(ctypes.c_uint),

839

]

780

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

781

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

782

ctypes.POINTER(ctypes.c_uint)]

840

783

openpgp_crt_verify_self.restype = _error_code

841

784

842

785

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

851

794

ctypes.c_size_t)]

852

795

openpgp_crt_get_fingerprint.restype = _error_code

853

796

854

if check_version(b"3.6.4"):

797

if check_version("3.6.4"):

855

798

certificate_type_get2 = _library.gnutls_certificate_type_get2

856

certificate_type_get2.argtypes = [ClientSession, ctypes.c_int]

799

certificate_type_get2.argtypes = [session_t, ctypes.c_int]

857

800

certificate_type_get2.restype = _error_code

858

801

859

802

# Remove non-public functions

871

814

connection.close()

872

815

873

816

874

class Client:

817

class Client(object):

875

818

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

876

819

877

820

Attributes:

878

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

821

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

879

822

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

880

823

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

881

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

882

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

883

running.

824

checker: subprocess.Popen(); a running checker process used

825

to see if the client lives.

826

'None' if no process is running.

884

827

checker_callback_tag: a GLib event source tag, or None

885

828

checker_command: string; External command which is run to check

886

829

if client lives. %() expansions are done at

961

904

# key_id() and fingerprint() functions

962

905

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

963

906

.replace(" ", ""))

964

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

965

"").upper()

907

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

966

908

.replace(" ", ""))

967

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

968

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

969

" fingerprint", client_name)

970

del settings[client_name]

971

continue

972

909

if "secret" in section:

973

910

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

974

911

.encode("utf-8"),

1015

952

self.last_enabled = None

1016

953

self.expires = None

1017

954

1018

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

1019

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

1020

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

955

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

956

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

957

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

1021

958

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

1022

959

datetime.datetime.utcnow())

1023

960

1051

988

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

1052

989

# Already enabled

1053

990

return

991

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

1054

992

self.enabled = True

1055

993

self.last_enabled = datetime.datetime.utcnow()

1056

994

self.init_checker()

1061

999

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

1062

1000

return False

1063

1001

if not quiet:

1064

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

1002

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

1065

1003

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

1066

1004

GLib.source_remove(self.disable_initiator_tag)

1067

1005

self.disable_initiator_tag = None

1079

1017

def __del__(self):

1080

1018

self.disable()

1081

1019

1082

def init_checker(self, randomize_start=False):

1083

# Schedule a new checker to be started a randomly selected

1084

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

1085

# the startup of checkers over time when the server is

1086

# started.

1020

def init_checker(self):

1021

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

1022

# and every interval from then on.

1087

1023

if self.checker_initiator_tag is not None:

1088

1024

GLib.source_remove(self.checker_initiator_tag)

1089

interval_milliseconds = int(self.interval.total_seconds()

1090

* 1000)

1091

if randomize_start:

1092

delay_milliseconds = random.randrange(

1093

interval_milliseconds + 1)

1094

else:

1095

delay_milliseconds = interval_milliseconds

1096

1025

self.checker_initiator_tag = GLib.timeout_add(

1097

delay_milliseconds, self.start_checker, randomize_start)

1098

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

1099

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

1100

# expire at the soonest one interval after a checker was

1101

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

1102

# time might have to be extended.

1103

now = datetime.datetime.utcnow()

1104

self.expires = now + delay + self.interval

1105

# Schedule a disable() at expire time

1026

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

1027

self.start_checker)

1028

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

1106

1029

if self.disable_initiator_tag is not None:

1107

1030

GLib.source_remove(self.disable_initiator_tag)

1108

1031

self.disable_initiator_tag = GLib.timeout_add(

1109

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

1110

self.disable)

1032

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

1033

# Also start a new checker *right now*.

1034

self.start_checker()

1111

1035

1112

1036

def checker_callback(self, source, condition, connection,

1113

1037

command):

1114

1038

"""The checker has completed, so take appropriate actions."""

1039

self.checker_callback_tag = None

1040

self.checker = None

1115

1041

# Read return code from connection (see call_pipe)

1116

1042

returncode = connection.recv()

1117

1043

connection.close()

1118

if self.checker is not None:

1119

self.checker.join()

1120

self.checker_callback_tag = None

1121

self.checker = None

1122

1044

1123

1045

if returncode >= 0:

1124

1046

self.last_checker_status = returncode

1125

1047

self.last_checker_signal = None

1126

1048

if self.last_checker_status == 0:

1127

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

1049

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

1050

vars(self))

1128

1051

self.checked_ok()

1129

1052

else:

1130

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

1053

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

1131

1054

else:

1132

1055

self.last_checker_status = -1

1133

1056

self.last_checker_signal = -returncode

1134

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

1057

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

1058

vars(self))

1135

1059

return False

1136

1060

1137

1061

def checked_ok(self):

1156

1080

def need_approval(self):

1157

1081

self.last_approval_request = datetime.datetime.utcnow()

1158

1082

1159

def start_checker(self, start_was_randomized=False):

1083

def start_checker(self):

1160

1084

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

1161

1085

1162

1086

If a checker already exists, leave it running and do

1171

1095

# should be.

1172

1096

1173

1097

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

1174

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

1098

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

1175

1099

self.checker.join()

1176

1100

self.checker = None

1177

1101

# Start a new checker if needed

1178

1102

if self.checker is None:

1179

1103

# Escape attributes for the shell

1180

1104

escaped_attrs = {

1181

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

1105

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

1182

1106

for attr in self.runtime_expansions}

1183

1107

try:

1184

1108

command = self.checker_command % escaped_attrs

1185

1109

except TypeError as error:

1186

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

1187

self.checker_command, exc_info=error)

1110

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

1111

self.checker_command,

1112

exc_info=error)

1188

1113

return True # Try again later

1189

1114

self.current_checker_command = command

1190

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

1115

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

1116

self.name)

1191

1117

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

1192

1118

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

1193

1119

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

1209

1135

kwargs=popen_args)

1210

1136

self.checker.start()

1211

1137

self.checker_callback_tag = GLib.io_add_watch(

1212

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

1213

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

1138

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

1214

1139

self.checker_callback, pipe[0], command)

1215

if start_was_randomized:

1216

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

1217

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

1218

# interval from then on.

1219

now = datetime.datetime.utcnow()

1220

self.checker_initiator_tag = GLib.timeout_add(

1221

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

1222

self.start_checker)

1223

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

1224

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

1225

return False

1226

1140

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

1227

1141

return True

1228

1142

1233

1147

self.checker_callback_tag = None

1234

1148

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

1235

1149

return

1236

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

1150

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

1237

1151

self.checker.terminate()

1238

1152

self.checker = None

1239

1153

1266

1180

func._dbus_name = func.__name__

1267

1181

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

1268

1182

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

1269

func._dbus_get_args_options = {"byte_arrays": byte_arrays}

1183

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

1270

1184

return func

1271

1185

1272

1186

return decorator

1361

1275

1362

1276

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1363

1277

out_signature="s",

1364

path_keyword="object_path",

1365

connection_keyword="connection")

1278

path_keyword='object_path',

1279

connection_keyword='connection')

1366

1280

def Introspect(self, object_path, connection):

1367

1281

"""Overloading of standard D-Bus method.

1368

1282

1417

1331

document.unlink()

1418

1332

except (AttributeError, xml.dom.DOMException,

1419

1333

xml.parsers.expat.ExpatError) as error:

1420

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

1421

exc_info=error)

1334

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

1335

exc_info=error)

1422

1336

return xmlstring

1423

1337

1424

1338

1482

1396

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

1483

1397

"'ay' signature {!r}"

1484

1398

.format(prop._dbus_signature))

1485

value = dbus.ByteArray(bytes(value))

1399

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

1400

for byte in value))

1486

1401

prop(value)

1487

1402

1488

1403

@dbus.service.method(dbus.PROPERTIES_IFACE,

1521

1436

1522

1437

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1523

1438

out_signature="s",

1524

path_keyword="object_path",

1525

connection_keyword="connection")

1439

path_keyword='object_path',

1440

connection_keyword='connection')

1526

1441

def Introspect(self, object_path, connection):

1527

1442

"""Overloading of standard D-Bus method.

1528

1443

1584

1499

document.unlink()

1585

1500

except (AttributeError, xml.dom.DOMException,

1586

1501

xml.parsers.expat.ExpatError) as error:

1587

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

1588

exc_info=error)

1502

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

1503

exc_info=error)

1589

1504

return xmlstring

1590

1505

1591

1506

1623

1538

1624

1539

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1625

1540

out_signature="s",

1626

path_keyword="object_path",

1627

connection_keyword="connection")

1541

path_keyword='object_path',

1542

connection_keyword='connection')

1628

1543

def Introspect(self, object_path, connection):

1629

1544

"""Overloading of standard D-Bus method.

1630

1545

1655

1570

document.unlink()

1656

1571

except (AttributeError, xml.dom.DOMException,

1657

1572

xml.parsers.expat.ExpatError) as error:

1658

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

1659

exc_info=error)

1573

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

1574

exc_info=error)

1660

1575

return xmlstring

1661

1576

1662

1577

2293

2208

del _interface

2294

2209

2295

2210

2296

class ProxyClient:

2211

class ProxyClient(object):

2297

2212

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

2298

2213

self._pipe = child_pipe

2299

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

2214

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

2300

2215

if not self._pipe.recv():

2301

2216

raise KeyError(key_id or fpr)

2302

2217

2303

2218

def __getattribute__(self, name):

2304

if name == "_pipe":

2219

if name == '_pipe':

2305

2220

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

2306

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

2221

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

2307

2222

data = self._pipe.recv()

2308

if data[0] == "data":

2223

if data[0] == 'data':

2309

2224

return data[1]

2310

if data[0] == "function":

2225

if data[0] == 'function':

2311

2226

2312

2227

def func(*args, **kwargs):

2313

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

2228

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

2314

2229

return self._pipe.recv()[1]

2315

2230

2316

2231

return func

2317

2232

2318

2233

def __setattr__(self, name, value):

2319

if name == "_pipe":

2234

if name == '_pipe':

2320

2235

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

2321

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

2236

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

2322

2237

2323

2238

2324

2239

class ClientHandler(socketserver.BaseRequestHandler, object):

2329

2244

2330

2245

def handle(self):

2331

2246

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

2332

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

2333

str(self.client_address))

2334

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

2247

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

2248

str(self.client_address))

2249

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

2250

self.server.child_pipe.fileno())

2335

2251

2336

2252

session = gnutls.ClientSession(self.request)

2337

2253

2338

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

2254

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

2339

2255

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

2340

2256

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

2341

2257

# "+DHE-DSS"))

2343

2259

priority = self.server.gnutls_priority

2344

2260

if priority is None:

2345

2261

priority = "NORMAL"

2346

gnutls.priority_set_direct(session,

2347

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

2262

gnutls.priority_set_direct(session._c_object,

2263

priority.encode("utf-8"),

2264

None)

2348

2265

2349

2266

# Start communication using the Mandos protocol

2350

2267

# Get protocol number

2351

2268

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

2352

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

2269

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

2353

2270

try:

2354

2271

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

2355

2272

raise RuntimeError(line)

2356

2273

except (ValueError, IndexError, RuntimeError) as error:

2357

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

2274

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

2358

2275

return

2359

2276

2360

2277

# Start GnuTLS connection

2361

2278

try:

2362

2279

session.handshake()

2363

2280

except gnutls.Error as error:

2364

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

2281

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

2365

2282

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

2366

2283

# established. Just abandon the request.

2367

2284

return

2368

log.debug("Handshake succeeded")

2285

logger.debug("Handshake succeeded")

2369

2286

2370

2287

approval_required = False

2371

2288

try:

2372

2289

if gnutls.has_rawpk:

2373

fpr = b""

2290

fpr = ""

2374

2291

try:

2375

2292

key_id = self.key_id(

2376

2293

self.peer_certificate(session))

2377

2294

except (TypeError, gnutls.Error) as error:

2378

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

2295

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

2379

2296

return

2380

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

2381

key_id.decode("utf-8",

2382

errors="replace"))

2297

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

2383

2298

2384

2299

else:

2385

key_id = b""

2300

key_id = ""

2386

2301

try:

2387

2302

fpr = self.fingerprint(

2388

2303

self.peer_certificate(session))

2389

2304

except (TypeError, gnutls.Error) as error:

2390

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

2305

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

2391

2306

return

2392

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

2307

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

2393

2308

2394

2309

try:

2395

2310

client = ProxyClient(child_pipe, key_id, fpr,

2404

2319

2405

2320

while True:

2406

2321

if not client.enabled:

2407

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

2322

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

2323

client.name)

2408

2324

if self.server.use_dbus:

2409

2325

# Emit D-Bus signal

2410

2326

client.Rejected("Disabled")

2414

2330

# We are approved or approval is disabled

2415

2331

break

2416

2332

elif client.approved is None:

2417

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

2418

client.name)

2333

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

2334

client.name)

2419

2335

if self.server.use_dbus:

2420

2336

# Emit D-Bus signal

2421

2337

client.NeedApproval(

2422

2338

client.approval_delay.total_seconds()

2423

2339

* 1000, client.approved_by_default)

2424

2340

else:

2425

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

2426

client.name)

2341

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

2342

client.name)

2427

2343

if self.server.use_dbus:

2428

2344

# Emit D-Bus signal

2429

2345

client.Rejected("Denied")

2437

2353

time2 = datetime.datetime.now()

2438

2354

if (time2 - time) >= delay:

2439

2355

if not client.approved_by_default:

2440

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

2441

" waiting for approval",

2442

client.name)

2356

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

2357

" waiting for approval",

2358

client.name)

2443

2359

if self.server.use_dbus:

2444

2360

# Emit D-Bus signal

2445

2361

client.Rejected("Approval timed out")

2452

2368

try:

2453

2369

session.send(client.secret)

2454

2370

except gnutls.Error as error:

2455

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

2371

logger.warning("gnutls send failed",

2372

exc_info=error)

2456

2373

return

2457

2374

2458

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

2375

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

2459

2376

# bump the timeout using extended_timeout

2460

2377

client.bump_timeout(client.extended_timeout)

2461

2378

if self.server.use_dbus:

2468

2385

try:

2469

2386

session.bye()

2470

2387

except gnutls.Error as error:

2471

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

2388

logger.warning("GnuTLS bye failed",

2389

exc_info=error)

2472

2390

2473

2391

@staticmethod

2474

2392

def peer_certificate(session):

2475

2393

"Return the peer's certificate as a bytestring"

2476

2394

try:

2477

cert_type = gnutls.certificate_type_get2(

2478

session, gnutls.CTYPE_PEERS)

2395

cert_type = gnutls.certificate_type_get2(session._c_object,

2396

gnutls.CTYPE_PEERS)

2479

2397

except AttributeError:

2480

cert_type = gnutls.certificate_type_get(session)

2398

cert_type = gnutls.certificate_type_get(session._c_object)

2481

2399

if gnutls.has_rawpk:

2482

2400

valid_cert_types = frozenset((gnutls.CRT_RAWPK,))

2483

2401

else:

2484

2402

valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))

2485

2403

# If not a valid certificate type...

2486

2404

if cert_type not in valid_cert_types:

2487

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

2488

valid_cert_types)

2405

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

2406

valid_cert_types)

2489

2407

# ...return invalid data

2490

2408

return b""

2491

2409

list_size = ctypes.c_uint(1)

2492

2410

cert_list = (gnutls.certificate_get_peers

2493

(session, ctypes.byref(list_size)))

2411

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

2494

2412

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

2495

2413

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

2496

2414

if list_size.value == 0:

2518

2436

buf = ctypes.create_string_buffer(32)

2519

2437

buf_len = ctypes.c_size_t(len(buf))

2520

2438

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

2521

gnutls.pubkey_get_key_id(

2522

pubkey,

2523

gnutls.KEYID_USE_SHA256,

2524

ctypes.cast(ctypes.byref(buf),

2525

ctypes.POINTER(ctypes.c_ubyte)),

2526

ctypes.byref(buf_len))

2439

gnutls.pubkey_get_key_id(pubkey,

2440

gnutls.KEYID_USE_SHA256,

2441

ctypes.cast(ctypes.byref(buf),

2442

ctypes.POINTER(ctypes.c_ubyte)),

2443

ctypes.byref(buf_len))

2527

2444

# Deinit the certificate

2528

2445

gnutls.pubkey_deinit(pubkey)

2529

2446

2570

2487

return hex_fpr

2571

2488

2572

2489

2573

class MultiprocessingMixIn:

2490

class MultiprocessingMixIn(object):

2574

2491

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

2575

2492

2576

2493

def sub_process_main(self, request, address):

2588

2505

return proc

2589

2506

2590

2507

2591

class MultiprocessingMixInWithPipe(MultiprocessingMixIn):

2508

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2592

2509

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

2593

2510

2594

2511

def process_request(self, request, client_address):

2609

2526

2610

2527

2611

2528

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2612

socketserver.TCPServer):

2613

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

2529

socketserver.TCPServer, object):

2530

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

2614

2531

2615

2532

Attributes:

2616

2533

enabled: Boolean; whether this server is activated yet

2667

2584

if SO_BINDTODEVICE is None:

2668

2585

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

2669

2586

# common enough.

2670

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

2587

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

2671

2588

SO_BINDTODEVICE = 25

2672

2589

try:

2673

2590

self.socket.setsockopt(

2675

2592

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

2676

2593

except socket.error as error:

2677

2594

if error.errno == errno.EPERM:

2678

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

2679

self.interface)

2595

logger.error("No permission to bind to"

2596

" interface %s", self.interface)

2680

2597

elif error.errno == errno.ENOPROTOOPT:

2681

log.error("SO_BINDTODEVICE not available; cannot"

2682

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

2598

logger.error("SO_BINDTODEVICE not available;"

2599

" cannot bind to interface %s",

2600

self.interface)

2683

2601

elif error.errno == errno.ENODEV:

2684

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

2685

" bind", self.interface)

2602

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

2603

" cannot bind", self.interface)

2686

2604

else:

2687

2605

raise

2688

2606

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

2689

2607

if self.server_address[0] or self.server_address[1]:

2690

if self.server_address[1]:

2691

self.allow_reuse_address = True

2692

2608

if not self.server_address[0]:

2693

2609

if self.address_family == socket.AF_INET6:

2694

2610

any_address = "::" # in6addr_any

2747

2663

def add_pipe(self, parent_pipe, proc):

2748

2664

# Call "handle_ipc" for both data and EOF events

2749

2665

GLib.io_add_watch(

2750

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

2751

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

2666

parent_pipe.fileno(),

2667

GLib.IO_IN | GLib.IO_HUP,

2752

2668

functools.partial(self.handle_ipc,

2753

2669

parent_pipe=parent_pipe,

2754

2670

proc=proc))

2767

2683

request = parent_pipe.recv()

2768

2684

command = request[0]

2769

2685

2770

if command == "init":

2686

if command == 'init':

2771

2687

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

2772

2688

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

2773

2689

address = request[3]

2774

2690

2775

2691

for c in self.clients.values():

2776

if key_id == ("E3B0C44298FC1C149AFBF4C8996FB924"

2777

"27AE41E4649B934CA495991B7852B855"):

2692

if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":

2778

2693

continue

2779

2694

if key_id and c.key_id == key_id:

2780

2695

client = c

2783

2698

client = c

2784

2699

break

2785

2700

else:

2786

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

2787

" %s", key_id or fpr, address)

2701

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

2702

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

2788

2703

if self.use_dbus:

2789

2704

# Emit D-Bus signal

2790

2705

mandos_dbus_service.ClientNotFound(key_id or fpr,

2793

2708

return False

2794

2709

2795

2710

GLib.io_add_watch(

2796

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

2797

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

2711

parent_pipe.fileno(),

2712

GLib.IO_IN | GLib.IO_HUP,

2798

2713

functools.partial(self.handle_ipc,

2799

2714

parent_pipe=parent_pipe,

2800

2715

proc=proc,

2803

2718

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

2804

2719

# same fileno

2805

2720

return False

2806

if command == "funcall":

2721

if command == 'funcall':

2807

2722

funcname = request[1]

2808

2723

args = request[2]

2809

2724

kwargs = request[3]

2810

2725

2811

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

2726

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

2812

2727

funcname)(*args,

2813

2728

**kwargs)))

2814

2729

2815

if command == "getattr":

2730

if command == 'getattr':

2816

2731

attrname = request[1]

2817

2732

if isinstance(client_object.__getattribute__(attrname),

2818

collections.abc.Callable):

2819

parent_pipe.send(("function", ))

2733

collections.Callable):

2734

parent_pipe.send(('function', ))

2820

2735

else:

2821

2736

parent_pipe.send((

2822

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

2737

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

2823

2738

2824

if command == "setattr":

2739

if command == 'setattr':

2825

2740

attrname = request[1]

2826

2741

value = request[2]

2827

2742

setattr(client_object, attrname, value)

2832

2747

def rfc3339_duration_to_delta(duration):

2833

2748

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

2834

2749

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

2750

>>> rfc3339_duration_to_delta("P7D")

2751

datetime.timedelta(7)

2752

>>> rfc3339_duration_to_delta("PT60S")

2753

datetime.timedelta(0, 60)

2754

>>> rfc3339_duration_to_delta("PT60M")

2755

datetime.timedelta(0, 3600)

2756

>>> rfc3339_duration_to_delta("PT24H")

2757

datetime.timedelta(1)

2758

>>> rfc3339_duration_to_delta("P1W")

2759

datetime.timedelta(7)

2760

>>> rfc3339_duration_to_delta("PT5M30S")

2761

datetime.timedelta(0, 330)

2762

>>> rfc3339_duration_to_delta("P1DT3M20S")

2763

datetime.timedelta(1, 200)

2851

2764

"""

2852

2765

2853

2766

# Parsing an RFC 3339 duration with regular expressions is not

2933

2846

def string_to_delta(interval):

2934

2847

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

2935

2848

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

2849

>>> string_to_delta('7d')

2850

datetime.timedelta(7)

2851

>>> string_to_delta('60s')

2852

datetime.timedelta(0, 60)

2853

>>> string_to_delta('60m')

2854

datetime.timedelta(0, 3600)

2855

>>> string_to_delta('24h')

2856

datetime.timedelta(1)

2857

>>> string_to_delta('1w')

2858

datetime.timedelta(7)

2859

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

2860

datetime.timedelta(0, 330)

2948

2861

"""

2949

2862

2950

2863

try:

3052

2965

3053

2966

options = parser.parse_args()

3054

2967

2968

if options.check:

2969

import doctest

2970

fail_count, test_count = doctest.testmod()

2971

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

2972

3055

2973

# Default values for config file for server-global settings

3056

2974

if gnutls.has_rawpk:

3057

2975

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

3077

2995

del priority

3078

2996

3079

2997

# Parse config file for server-global settings

3080

server_config = configparser.ConfigParser(server_defaults)

2998

server_config = configparser.SafeConfigParser(server_defaults)

3081

2999

del server_defaults

3082

3000

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

3083

# Convert the ConfigParser object to a dict

3001

# Convert the SafeConfigParser object to a dict

3084

3002

server_settings = server_config.defaults()

3085

3003

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

3086

3004

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

3153

3071

3154

3072

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

3155

3073

syslogger.setFormatter(

3156

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

3157

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

3074

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

3075

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

3158

3076

server_settings["servicename"])))

3159

3077

3160

3078

# Parse config file with clients

3161

client_config = configparser.ConfigParser(Client.client_defaults)

3079

client_config = configparser.SafeConfigParser(Client

3080

.client_defaults)

3162

3081

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

3163

3082

"clients.conf"))

3164

3083

3184

3103

try:

3185

3104

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

3186

3105

except IOError as e:

3187

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

3188

exc_info=e)

3106

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

3107

exc_info=e)

3189

3108

3190

3109

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

3191

3110

("mandos", "mandos"),

3202

3121

try:

3203

3122

os.setgid(gid)

3204

3123

os.setuid(uid)

3205

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

3124

if debug:

3125

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

3126

gid))

3206

3127

except OSError as error:

3207

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

3208

os.strerror(error.errno))

3128

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

3129

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

3209

3130

if error.errno != errno.EPERM:

3210

3131

raise

3211

3132

3218

3139

3219

3140

@gnutls.log_func

3220

3141

def debug_gnutls(level, string):

3221

log.debug("GnuTLS: %s",

3222

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

3142

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

3223

3143

3224

3144

gnutls.global_set_log_function(debug_gnutls)

3225

3145

3234

3154

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

3235

3155

daemon()

3236

3156

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()

3157

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

3158

# to inform GLib that threads will be used.

3159

GLib.threads_init()

3241

3160

3242

3161

global main_loop

3243

3162

# From the Avahi example code

3254

3173

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

3255

3174

do_not_queue=True)

3256

3175

except dbus.exceptions.DBusException as e:

3257

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

3176

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

3258

3177

use_dbus = False

3259

3178

server_settings["use_dbus"] = False

3260

3179

tcp_server.use_dbus = False

3319

3238

if isinstance(s, bytes)

3320

3239

else s) for s in

3321

3240

value["client_structure"]]

3322

# .name, .host, and .checker_command

3323

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

3241

# .name & .host

3242

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

3324

3243

if isinstance(value[k], bytes):

3325

3244

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

3326

if "key_id" not in value:

3245

if not value.has_key("key_id"):

3327

3246

value["key_id"] = ""

3328

elif "fingerprint" not in value:

3247

elif not value.has_key("fingerprint"):

3329

3248

value["fingerprint"] = ""

3330

3249

# old_client_settings

3331

3250

# .keys()

3336

3255

for key, value in

3337

3256

bytes_old_client_settings.items()}

3338

3257

del bytes_old_client_settings

3339

# .host and .checker_command

3258

# .host

3340

3259

for value in old_client_settings.values():

3341

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

3342

if isinstance(value[attribute], bytes):

3343

value[attribute] = (value[attribute]

3344

.decode("utf-8"))

3260

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

3261

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

3262

.decode("utf-8"))

3345

3263

os.remove(stored_state_path)

3346

3264

except IOError as e:

3347

3265

if e.errno == errno.ENOENT:

3348

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

3349

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

3266

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

3267

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

3350

3268

else:

3351

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

3352

exc_info=e)

3269

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

3270

exc_info=e)

3353

3271

raise

3354

3272

except EOFError as e:

3355

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

3356

exc_info=e)

3273

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

3274

"EOFError:",

3275

exc_info=e)

3357

3276

3358

3277

with PGPEngine() as pgp:

3359

3278

for client_name, client in clients_data.items():

3386

3305

if client["enabled"]:

3387

3306

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

3388

3307

if not client["last_checked_ok"]:

3389

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

3390

" never performed a successful"

3391

" checker", client_name)

3308

logger.warning(

3309

"disabling client {} - Client never "

3310

"performed a successful checker".format(

3311

client_name))

3392

3312

client["enabled"] = False

3393

3313

elif client["last_checker_status"] != 0:

3394

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

3395

" last checker failed with error"

3396

" code %s", client_name,

3397

client["last_checker_status"])

3314

logger.warning(

3315

"disabling client {} - Client last"

3316

" checker failed with error code"

3317

" {}".format(

3318

client_name,

3319

client["last_checker_status"]))

3398

3320

client["enabled"] = False

3399

3321

else:

3400

3322

client["expires"] = (

3401

3323

datetime.datetime.utcnow()

3402

3324

+ client["timeout"])

3403

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

3404

" enabled", client_name)

3325

logger.debug("Last checker succeeded,"

3326

" keeping {} enabled".format(

3327

client_name))

3405

3328

try:

3406

3329

client["secret"] = pgp.decrypt(

3407

3330

client["encrypted_secret"],

3408

3331

client_settings[client_name]["secret"])

3409

3332

except PGPError:

3410

3333

# If decryption fails, we use secret from new settings

3411

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

3412

client_name)

3334

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

3335

client_name))

3413

3336

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

3414

3337

["secret"])

3415

3338

3429

3352

server_settings=server_settings)

3430

3353

3431

3354

if not tcp_server.clients:

3432

log.warning("No clients defined")

3355

logger.warning("No clients defined")

3433

3356

3434

3357

if not foreground:

3435

3358

if pidfile is not None:

3438

3361

with pidfile:

3439

3362

print(pid, file=pidfile)

3440

3363

except IOError:

3441

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

3442

pidfilename, pid)

3364

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

3365

pidfilename, pid)

3443

3366

del pidfile

3444

3367

del pidfilename

3445

3368

3595

3518

3596

3519

try:

3597

3520

with tempfile.NamedTemporaryFile(

3598

mode="wb",

3521

mode='wb',

3599

3522

suffix=".pickle",

3600

prefix="clients-",

3523

prefix='clients-',

3601

3524

dir=os.path.dirname(stored_state_path),

3602

3525

delete=False) as stored_state:

3603

3526

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

3611

3534

except NameError:

3612

3535

pass

3613

3536

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

3614

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

3615

os.strerror(e.errno))

3537

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

3538

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

3616

3539

else:

3617

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

3618

exc_info=e)

3540

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

3541

exc_info=e)

3619

3542

raise

3620

3543

3621

3544

# Delete all clients, and settings from config

3638

3561

mandos_dbus_service.client_added_signal(client)

3639

3562

# Need to initiate checking of clients

3640

3563

if client.enabled:

3641

client.init_checker(randomize_start=True)

3564

client.init_checker()

3642

3565

3643

3566

tcp_server.enable()

3644

3567

tcp_server.server_activate()

3647

3570

if zeroconf:

3648

3571

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

3649

3572

if use_ipv6:

3650

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

3651

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

3573

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

3574

" flowinfo %d, scope_id %d",

3575

*tcp_server.socket.getsockname())

3652

3576

else: # IPv4

3653

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

3654

*tcp_server.socket.getsockname())

3577

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

3578

*tcp_server.socket.getsockname())

3655

3579

3656

3580

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

3657

3581

3661

3585

try:

3662

3586

service.activate()

3663

3587

except dbus.exceptions.DBusException as error:

3664

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

3588

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

3665

3589

cleanup()

3666

3590

sys.exit(1)

3667

3591

# End of Avahi example code

3668

3592

3669

GLib.io_add_watch(

3670

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

3671

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

3672

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

3673

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

3593

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

3594

lambda *args, **kwargs:

3595

(tcp_server.handle_request

3596

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

3674

3597

3675

log.debug("Starting main loop")

3598

logger.debug("Starting main loop")

3676

3599

main_loop.run()

3677

3600

except AvahiError as error:

3678

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

3601

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

3679

3602

cleanup()

3680

3603

sys.exit(1)

3681

3604

except KeyboardInterrupt:

3682

3605

if debug:

3683

3606

print("", file=sys.stderr)

3684

log.debug("Server received KeyboardInterrupt")

3685

log.debug("Server exiting")

3607

logger.debug("Server received KeyboardInterrupt")

3608

logger.debug("Server exiting")

3686

3609

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

3687

3610

cleanup()

3688

3611

3689

3690

def parse_test_args():

3691

# type: () -> argparse.Namespace

3692

parser = argparse.ArgumentParser(add_help=False)

3693

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

3694

parser.add_argument("--prefix", )

3695

args, unknown_args = parser.parse_known_args()

3696

if args.check:

3697

# Remove test options from sys.argv

3698

sys.argv[1:] = unknown_args

3699

return args

3700

3701

# Add all tests from doctest strings

3702

def load_tests(loader, tests, none):

3703

import doctest

3704

tests.addTests(doctest.DocTestSuite())

3705

return tests

3706

3707

if __name__ == "__main__":

3708

options = parse_test_args()

3709

try:

3710

if options.check:

3711

extra_test_prefix = options.prefix

3712

if extra_test_prefix is not None:

3713

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

3714

.result.wasSuccessful()):

3715

sys.exit(1)

3716

class ExtraTestLoader(unittest.TestLoader):

3717

testMethodPrefix = extra_test_prefix

3718

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

3719

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

3720

else:

3721

unittest.main(argv=[""])

3722

else:

3723

main()

3724

finally:

3725

logging.shutdown()

3726

3727

# Local Variables:

3728

# run-tests:

3729

# (lambda (&optional extra)

3730

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

3731

# extra))

3732

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

3733

# (funcall remove-test-window)

3734

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

3735

# run-tests-in-test-buffer:

3736

# (lambda (dir &optional extra)

3737

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

3738

# (setq buffer-read-only nil

3739

# default-directory dir)

3740

# (erase-buffer)

3741

# (compilation-mode))

3742

# (let ((process-result

3743

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

3744

# (process-file-shell-command

3745

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

3746

# (and (numberp process-result)

3747

# (= process-result 0))))

3748

# get-command-line:

3749

# (lambda (&optional extra)

3750

# (let ((quoted-script

3751

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

3752

# (format

3753

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

3754

# quoted-script)))

3755

# get-script-name:

3756

# (lambda ()

3757

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

3758

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

3759

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

3760

# (buffer-file-name))))

3761

# remove-test-window:

3762

# (lambda ()

3763

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

3764

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

3765

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

3766

# (lambda ()

3767

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

3768

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

3769

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

3770

# (display-buffer-overriding-action

3771

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

3772

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

3773

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

3774

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

3775

# eval:

3776

# (progn

3777

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

3778

# (funcall run-tests t)))

3779

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

3780

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

3781

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

3782

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

3783

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

3784

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

3785

# End:

3612

3613

if __name__ == '__main__':

3614

main()