/mandos/trunk : revision 1299

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#!/usr/bin/python

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

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#!/usr/bin/python3 -bI

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

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#

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

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#

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

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#

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# Everything else is

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#

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# This file is part of Mandos.

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#

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#

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

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#

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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except ImportError:

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pass

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import sys

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import unittest

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import argparse

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import logging

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import os

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try:

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import SocketServer as socketserver

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except ImportError:

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import socketserver

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import socket

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import argparse

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import datetime

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import errno

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try:

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import ConfigParser as configparser

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except ImportError:

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import configparser

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import sys

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import re

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import os

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import signal

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import subprocess

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import atexit

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import stat

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import logging

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import logging.handlers

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import pwd

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import contextlib

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import itertools

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import collections

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import codecs

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import random

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import shlex

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import dbus

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import dbus.service

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import gi

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from gi.repository import GLib

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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import xml.dom.minidom

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import inspect

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if sys.version_info.major == 2:

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__metaclass__ = type

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str = unicode

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input = raw_input

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

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try:

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collections.abc.Callable

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except AttributeError:

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class abc:

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Callable = collections.Callable

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collections.abc = abc

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del abc

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# Add shlex.quote if it does not exist

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try:

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shlex.quote

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except AttributeError:

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shlex.quote = re.escape

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# Show warnings by default

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if not sys.warnoptions:

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import warnings

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warnings.simplefilter("default")

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# Try to find the value of SO_BINDTODEVICE:

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try:

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

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# No value found

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SO_BINDTODEVICE = None

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if sys.version_info.major == 2:

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str = unicode

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if sys.version_info < (3, 2):

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configparser.Configparser = configparser.SafeConfigParser

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version = "1.8.4"

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version = "1.8.16"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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

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

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syslogger = None

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try:

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facility=logging.handlers.SysLogHandler.LOG_DAEMON,

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address="/dev/log"))

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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

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" %(message)s"))

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log.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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

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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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logger.setLevel(level)

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

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" [%(process)d]:"

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" %(levelname)s:"

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" %(message)s"))

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log.addHandler(console)

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log.setLevel(level)

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class PGPError(Exception):

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pass

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class PGPEngine(object):

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class PGPEngine:

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

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def __init__(self):

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

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for line in output.splitlines():

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

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if name == "gpg":

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if name == b"gpg":

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self.gpg = path

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break

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except OSError as e:

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if e.errno != errno.ENOENT:

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raise

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self.gnupgargs = ['--batch',

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'--homedir', self.tempdir,

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'--force-mdc',

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'--quiet']

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self.gnupgargs = ["--batch",

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"--homedir", self.tempdir,

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"--force-mdc",

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"--quiet"]

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

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

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

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

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def __enter__(self):

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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

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"--passphrase-file",

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passfile.name]

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+ self.gnupgargs,

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stdin=subprocess.PIPE,

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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

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"--passphrase-file",

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passfile.name]

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+ self.gnupgargs,

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stdin=subprocess.PIPE,

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# Pretend that we have an Avahi module

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class avahi(object):

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class avahi:

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

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

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

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pass

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class AvahiService(object):

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class AvahiService:

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"""An Avahi (Zeroconf) service.

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Attributes:

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

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Used to optionally bind to the specified interface.

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name: string; Example: 'Mandos'

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

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name: string; Example: "Mandos"

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

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

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port: integer; what port to announce

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TXT: list of strings; TXT record for the service

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def rename(self, remove=True):

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

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if self.rename_count >= self.max_renames:

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

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" after %i retries, exiting.",

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self.rename_count)

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

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" after %i retries, exiting.",

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self.rename_count)

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raise AvahiServiceError("Too many renames")

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self.name = str(

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self.server.GetAlternativeServiceName(self.name))

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self.rename_count += 1

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

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self.name)

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

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self.name)

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if remove:

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self.remove()

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try:

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except dbus.exceptions.DBusException as error:

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if (error.get_dbus_name()

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

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

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

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return self.rename(remove=False)

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else:

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

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

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self.cleanup()

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os._exit(1)

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avahi.DBUS_INTERFACE_ENTRY_GROUP)

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self.entry_group_state_changed_match = (

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self.group.connect_to_signal(

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'StateChanged', self.entry_group_state_changed))

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

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self.name, self.type)

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"StateChanged", self.entry_group_state_changed))

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

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self.name, self.type)

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self.group.AddService(

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self.interface,

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self.protocol,

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def entry_group_state_changed(self, state, error):

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

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

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

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if state == avahi.ENTRY_GROUP_ESTABLISHED:

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logger.debug("Zeroconf service established.")

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log.debug("Zeroconf service established.")

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elif state == avahi.ENTRY_GROUP_COLLISION:

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

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

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self.rename()

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elif state == avahi.ENTRY_GROUP_FAILURE:

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

433

str(error))

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

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str(error))

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

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def cleanup(self):

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

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

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

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

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bad_states = {

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avahi.SERVER_INVALID: "Zeroconf server invalid",

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avahi.SERVER_REGISTERING: None,

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if state in bad_states:

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if bad_states[state] is not None:

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if error is None:

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logger.error(bad_states[state])

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log.error(bad_states[state])

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else:

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

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

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self.cleanup()

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elif state == avahi.SERVER_RUNNING:

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try:

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except dbus.exceptions.DBusException as error:

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if (error.get_dbus_name()

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

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logger.info("Local Zeroconf service name"

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" collision.")

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

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return self.rename(remove=False)

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else:

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

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

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self.cleanup()

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os._exit(1)

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else:

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if error is None:

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

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

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else:

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

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

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509

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510

def activate(self):

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

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class AvahiServiceToSyslog(AvahiService):

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

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

498

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

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

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**kwargs)

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syslogger.setFormatter(logging.Formatter(

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

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

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.format(self.name)))

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531

return ret

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# Pretend that we have a GnuTLS module

506

class gnutls(object):

535

class gnutls:

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

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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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535

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# Types

536

class session_int(ctypes.Structure):

565

class _session_int(ctypes.Structure):

537

566

_fields_ = []

538

session_t = ctypes.POINTER(session_int)

567

session_t = ctypes.POINTER(_session_int)

539

568

540

569

class certificate_credentials_st(ctypes.Structure):

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_fields_ = []

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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):

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580

_fields_ = []

552

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

581

openpgp_crt_t = ctypes.POINTER(_openpgp_crt_int)

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openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

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583

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

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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

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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)

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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

if gnutls.check_version("3.5.6"):

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

794

851

ctypes.c_size_t)]

795

852

openpgp_crt_get_fingerprint.restype = _error_code

796

853

797

if check_version("3.6.4"):

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

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

825

to see if the client lives.

826

'None' if no process is running.

881

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

882

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

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

829

886

if client lives. %() expansions are done at

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):

1038

1114

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

1039

self.checker_callback_tag = None

1040

self.checker = None

1041

1115

# Read return code from connection (see call_pipe)

1042

1116

returncode = connection.recv()

1043

1117

connection.close()

1118

if self.checker is not None:

1119

self.checker.join()

1120

self.checker_callback_tag = None

1121

self.checker = None

1044

1122

1045

1123

if returncode >= 0:

1046

1124

self.last_checker_status = returncode

1047

1125

self.last_checker_signal = None

1048

1126

if self.last_checker_status == 0:

1049

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

1050

vars(self))

1127

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

1051

1128

self.checked_ok()

1052

1129

else:

1053

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

1130

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

1054

1131

else:

1055

1132

self.last_checker_status = -1

1056

1133

self.last_checker_signal = -returncode

1057

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

1058

vars(self))

1134

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

1059

1135

return False

1060

1136

1061

1137

def checked_ok(self):

1080

1156

def need_approval(self):

1081

1157

self.last_approval_request = datetime.datetime.utcnow()

1082

1158

1083

def start_checker(self):

1159

def start_checker(self, start_was_randomized=False):

1084

1160

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

1085

1161

1086

1162

If a checker already exists, leave it running and do

1095

1171

# should be.

1096

1172

1097

1173

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

1098

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

1174

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

1099

1175

self.checker.join()

1100

1176

self.checker = None

1101

1177

# Start a new checker if needed

1102

1178

if self.checker is None:

1103

1179

# Escape attributes for the shell

1104

1180

escaped_attrs = {

1105

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

1181

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

1106

1182

for attr in self.runtime_expansions}

1107

1183

try:

1108

1184

command = self.checker_command % escaped_attrs

1109

1185

except TypeError as error:

1110

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

1111

self.checker_command,

1112

exc_info=error)

1186

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

1187

self.checker_command, exc_info=error)

1113

1188

return True # Try again later

1114

1189

self.current_checker_command = command

1115

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

1116

self.name)

1190

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

1117

1191

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

1118

1192

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

1119

1193

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

1135

1209

kwargs=popen_args)

1136

1210

self.checker.start()

1137

1211

self.checker_callback_tag = GLib.io_add_watch(

1138

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

1212

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

1213

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

1139

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

1140

1226

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

1141

1227

return True

1142

1228

1147

1233

self.checker_callback_tag = None

1148

1234

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

1149

1235

return

1150

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

1236

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

1151

1237

self.checker.terminate()

1152

1238

self.checker = None

1153

1239

1180

1266

func._dbus_name = func.__name__

1181

1267

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

1182

1268

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

1183

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

1269

func._dbus_get_args_options = {"byte_arrays": byte_arrays}

1184

1270

return func

1185

1271

1186

1272

return decorator

1275

1361

1276

1362

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1277

1363

out_signature="s",

1278

path_keyword='object_path',

1279

connection_keyword='connection')

1364

path_keyword="object_path",

1365

connection_keyword="connection")

1280

1366

def Introspect(self, object_path, connection):

1281

1367

"""Overloading of standard D-Bus method.

1282

1368

1331

1417

document.unlink()

1332

1418

except (AttributeError, xml.dom.DOMException,

1333

1419

xml.parsers.expat.ExpatError) as error:

1334

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

1335

exc_info=error)

1420

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

1421

exc_info=error)

1336

1422

return xmlstring

1337

1423

1338

1424

1396

1482

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

1397

1483

"'ay' signature {!r}"

1398

1484

.format(prop._dbus_signature))

1399

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

1400

for byte in value))

1485

value = dbus.ByteArray(bytes(value))

1401

1486

prop(value)

1402

1487

1403

1488

@dbus.service.method(dbus.PROPERTIES_IFACE,

1436

1521

1437

1522

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1438

1523

out_signature="s",

1439

path_keyword='object_path',

1440

connection_keyword='connection')

1524

path_keyword="object_path",

1525

connection_keyword="connection")

1441

1526

def Introspect(self, object_path, connection):

1442

1527

"""Overloading of standard D-Bus method.

1443

1528

1499

1584

document.unlink()

1500

1585

except (AttributeError, xml.dom.DOMException,

1501

1586

xml.parsers.expat.ExpatError) as error:

1502

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

1503

exc_info=error)

1587

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

1588

exc_info=error)

1504

1589

return xmlstring

1505

1590

1506

1591

1538

1623

1539

1624

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1540

1625

out_signature="s",

1541

path_keyword='object_path',

1542

connection_keyword='connection')

1626

path_keyword="object_path",

1627

connection_keyword="connection")

1543

1628

def Introspect(self, object_path, connection):

1544

1629

"""Overloading of standard D-Bus method.

1545

1630

1570

1655

document.unlink()

1571

1656

except (AttributeError, xml.dom.DOMException,

1572

1657

xml.parsers.expat.ExpatError) as error:

1573

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

1574

exc_info=error)

1658

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

1659

exc_info=error)

1575

1660

return xmlstring

1576

1661

1577

1662

2208

2293

del _interface

2209

2294

2210

2295

2211

class ProxyClient(object):

2296

class ProxyClient:

2212

2297

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

2213

2298

self._pipe = child_pipe

2214

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

2299

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

2215

2300

if not self._pipe.recv():

2216

2301

raise KeyError(key_id or fpr)

2217

2302

2218

2303

def __getattribute__(self, name):

2219

if name == '_pipe':

2304

if name == "_pipe":

2220

2305

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

2221

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

2306

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

2222

2307

data = self._pipe.recv()

2223

if data[0] == 'data':

2308

if data[0] == "data":

2224

2309

return data[1]

2225

if data[0] == 'function':

2310

if data[0] == "function":

2226

2311

2227

2312

def func(*args, **kwargs):

2228

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

2313

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

2229

2314

return self._pipe.recv()[1]

2230

2315

2231

2316

return func

2232

2317

2233

2318

def __setattr__(self, name, value):

2234

if name == '_pipe':

2319

if name == "_pipe":

2235

2320

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

2236

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

2321

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

2237

2322

2238

2323

2239

2324

class ClientHandler(socketserver.BaseRequestHandler, object):

2244

2329

2245

2330

def handle(self):

2246

2331

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

2247

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

2248

str(self.client_address))

2249

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

2250

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())

2251

2335

2252

2336

session = gnutls.ClientSession(self.request)

2253

2337

2254

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

2338

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

2255

2339

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

2256

2340

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

2257

2341

# "+DHE-DSS"))

2259

2343

priority = self.server.gnutls_priority

2260

2344

if priority is None:

2261

2345

priority = "NORMAL"

2262

gnutls.priority_set_direct(session._c_object,

2263

priority.encode("utf-8"),

2264

None)

2346

gnutls.priority_set_direct(session,

2347

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

2265

2348

2266

2349

# Start communication using the Mandos protocol

2267

2350

# Get protocol number

2268

2351

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

2269

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

2352

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

2270

2353

try:

2271

2354

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

2272

2355

raise RuntimeError(line)

2273

2356

except (ValueError, IndexError, RuntimeError) as error:

2274

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

2357

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

2275

2358

return

2276

2359

2277

2360

# Start GnuTLS connection

2278

2361

try:

2279

2362

session.handshake()

2280

2363

except gnutls.Error as error:

2281

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

2364

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

2282

2365

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

2283

2366

# established. Just abandon the request.

2284

2367

return

2285

logger.debug("Handshake succeeded")

2368

log.debug("Handshake succeeded")

2286

2369

2287

2370

approval_required = False

2288

2371

try:

2289

2372

if gnutls.has_rawpk:

2290

fpr = ""

2373

fpr = b""

2291

2374

try:

2292

2375

key_id = self.key_id(

2293

2376

self.peer_certificate(session))

2294

2377

except (TypeError, gnutls.Error) as error:

2295

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

2378

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

2296

2379

return

2297

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

2380

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

2381

key_id.decode("utf-8",

2382

errors="replace"))

2298

2383

2299

2384

else:

2300

key_id = ""

2385

key_id = b""

2301

2386

try:

2302

2387

fpr = self.fingerprint(

2303

2388

self.peer_certificate(session))

2304

2389

except (TypeError, gnutls.Error) as error:

2305

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

2390

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

2306

2391

return

2307

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

2392

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

2308

2393

2309

2394

try:

2310

2395

client = ProxyClient(child_pipe, key_id, fpr,

2319

2404

2320

2405

while True:

2321

2406

if not client.enabled:

2322

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

2323

client.name)

2407

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

2324

2408

if self.server.use_dbus:

2325

2409

# Emit D-Bus signal

2326

2410

client.Rejected("Disabled")

2330

2414

# We are approved or approval is disabled

2331

2415

break

2332

2416

elif client.approved is None:

2333

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

2334

client.name)

2417

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

2418

client.name)

2335

2419

if self.server.use_dbus:

2336

2420

# Emit D-Bus signal

2337

2421

client.NeedApproval(

2338

2422

client.approval_delay.total_seconds()

2339

2423

* 1000, client.approved_by_default)

2340

2424

else:

2341

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

2342

client.name)

2425

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

2426

client.name)

2343

2427

if self.server.use_dbus:

2344

2428

# Emit D-Bus signal

2345

2429

client.Rejected("Denied")

2353

2437

time2 = datetime.datetime.now()

2354

2438

if (time2 - time) >= delay:

2355

2439

if not client.approved_by_default:

2356

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

2357

" waiting for approval",

2358

client.name)

2440

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

2441

" waiting for approval",

2442

client.name)

2359

2443

if self.server.use_dbus:

2360

2444

# Emit D-Bus signal

2361

2445

client.Rejected("Approval timed out")

2368

2452

try:

2369

2453

session.send(client.secret)

2370

2454

except gnutls.Error as error:

2371

logger.warning("gnutls send failed",

2372

exc_info=error)

2455

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

2373

2456

return

2374

2457

2375

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

2458

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

2376

2459

# bump the timeout using extended_timeout

2377

2460

client.bump_timeout(client.extended_timeout)

2378

2461

if self.server.use_dbus:

2385

2468

try:

2386

2469

session.bye()

2387

2470

except gnutls.Error as error:

2388

logger.warning("GnuTLS bye failed",

2389

exc_info=error)

2471

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

2390

2472

2391

2473

@staticmethod

2392

2474

def peer_certificate(session):

2393

2475

"Return the peer's certificate as a bytestring"

2394

2476

try:

2395

cert_type = gnutls.certificate_type_get2(session._c_object,

2396

gnutls.CTYPE_PEERS)

2477

cert_type = gnutls.certificate_type_get2(

2478

session, gnutls.CTYPE_PEERS)

2397

2479

except AttributeError:

2398

cert_type = gnutls.certificate_type_get(session._c_object)

2480

cert_type = gnutls.certificate_type_get(session)

2399

2481

if gnutls.has_rawpk:

2400

2482

valid_cert_types = frozenset((gnutls.CRT_RAWPK,))

2401

2483

else:

2402

2484

valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))

2403

2485

# If not a valid certificate type...

2404

2486

if cert_type not in valid_cert_types:

2405

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

2406

valid_cert_types)

2487

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

2488

valid_cert_types)

2407

2489

# ...return invalid data

2408

2490

return b""

2409

2491

list_size = ctypes.c_uint(1)

2410

2492

cert_list = (gnutls.certificate_get_peers

2411

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

2493

(session, ctypes.byref(list_size)))

2412

2494

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

2413

2495

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

2414

2496

if list_size.value == 0:

2436

2518

buf = ctypes.create_string_buffer(32)

2437

2519

buf_len = ctypes.c_size_t(len(buf))

2438

2520

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

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))

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))

2444

2527

# Deinit the certificate

2445

2528

gnutls.pubkey_deinit(pubkey)

2446

2529

2487

2570

return hex_fpr

2488

2571

2489

2572

2490

class MultiprocessingMixIn(object):

2573

class MultiprocessingMixIn:

2491

2574

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

2492

2575

2493

2576

def sub_process_main(self, request, address):

2505

2588

return proc

2506

2589

2507

2590

2508

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2591

class MultiprocessingMixInWithPipe(MultiprocessingMixIn):

2509

2592

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

2510

2593

2511

2594

def process_request(self, request, client_address):

2526

2609

2527

2610

2528

2611

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2529

socketserver.TCPServer, object):

2530

"""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

2531

2614

2532

2615

Attributes:

2533

2616

enabled: Boolean; whether this server is activated yet

2584

2667

if SO_BINDTODEVICE is None:

2585

2668

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

2586

2669

# common enough.

2587

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

2670

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

2588

2671

SO_BINDTODEVICE = 25

2589

2672

try:

2590

2673

self.socket.setsockopt(

2592

2675

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

2593

2676

except socket.error as error:

2594

2677

if error.errno == errno.EPERM:

2595

logger.error("No permission to bind to"

2596

" interface %s", self.interface)

2678

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

2679

self.interface)

2597

2680

elif error.errno == errno.ENOPROTOOPT:

2598

logger.error("SO_BINDTODEVICE not available;"

2599

" cannot bind to interface %s",

2600

self.interface)

2681

log.error("SO_BINDTODEVICE not available; cannot"

2682

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

2601

2683

elif error.errno == errno.ENODEV:

2602

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

2603

" cannot bind", self.interface)

2684

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

2685

" bind", self.interface)

2604

2686

else:

2605

2687

raise

2606

2688

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

2665

2747

def add_pipe(self, parent_pipe, proc):

2666

2748

# Call "handle_ipc" for both data and EOF events

2667

2749

GLib.io_add_watch(

2668

parent_pipe.fileno(),

2669

GLib.IO_IN | GLib.IO_HUP,

2750

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

2751

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

2670

2752

functools.partial(self.handle_ipc,

2671

2753

parent_pipe=parent_pipe,

2672

2754

proc=proc))

2685

2767

request = parent_pipe.recv()

2686

2768

command = request[0]

2687

2769

2688

if command == 'init':

2770

if command == "init":

2689

2771

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

2690

2772

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

2691

2773

address = request[3]

2692

2774

2693

2775

for c in self.clients.values():

2694

if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":

2776

if key_id == ("E3B0C44298FC1C149AFBF4C8996FB924"

2777

"27AE41E4649B934CA495991B7852B855"):

2695

2778

continue

2696

2779

if key_id and c.key_id == key_id:

2697

2780

client = c

2700

2783

client = c

2701

2784

break

2702

2785

else:

2703

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

2704

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

2786

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

2787

" %s", key_id or fpr, address)

2705

2788

if self.use_dbus:

2706

2789

# Emit D-Bus signal

2707

2790

mandos_dbus_service.ClientNotFound(key_id or fpr,

2710

2793

return False

2711

2794

2712

2795

GLib.io_add_watch(

2713

parent_pipe.fileno(),

2714

GLib.IO_IN | GLib.IO_HUP,

2796

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

2797

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

2715

2798

functools.partial(self.handle_ipc,

2716

2799

parent_pipe=parent_pipe,

2717

2800

proc=proc,

2720

2803

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

2721

2804

# same fileno

2722

2805

return False

2723

if command == 'funcall':

2806

if command == "funcall":

2724

2807

funcname = request[1]

2725

2808

args = request[2]

2726

2809

kwargs = request[3]

2727

2810

2728

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

2811

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

2729

2812

funcname)(*args,

2730

2813

**kwargs)))

2731

2814

2732

if command == 'getattr':

2815

if command == "getattr":

2733

2816

attrname = request[1]

2734

2817

if isinstance(client_object.__getattribute__(attrname),

2735

collections.Callable):

2736

parent_pipe.send(('function', ))

2818

collections.abc.Callable):

2819

parent_pipe.send(("function", ))

2737

2820

else:

2738

2821

parent_pipe.send((

2739

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

2822

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

2740

2823

2741

if command == 'setattr':

2824

if command == "setattr":

2742

2825

attrname = request[1]

2743

2826

value = request[2]

2744

2827

setattr(client_object, attrname, value)

2749

2832

def rfc3339_duration_to_delta(duration):

2750

2833

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

2751

2834

2752

>>> rfc3339_duration_to_delta("P7D")

2753

datetime.timedelta(7)

2754

>>> rfc3339_duration_to_delta("PT60S")

2755

datetime.timedelta(0, 60)

2756

>>> rfc3339_duration_to_delta("PT60M")

2757

datetime.timedelta(0, 3600)

2758

>>> rfc3339_duration_to_delta("PT24H")

2759

datetime.timedelta(1)

2760

>>> rfc3339_duration_to_delta("P1W")

2761

datetime.timedelta(7)

2762

>>> rfc3339_duration_to_delta("PT5M30S")

2763

datetime.timedelta(0, 330)

2764

>>> rfc3339_duration_to_delta("P1DT3M20S")

2765

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

2766

2851

"""

2767

2852

2768

2853

# Parsing an RFC 3339 duration with regular expressions is not

2848

2933

def string_to_delta(interval):

2849

2934

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

2850

2935

2851

>>> string_to_delta('7d')

2852

datetime.timedelta(7)

2853

>>> string_to_delta('60s')

2854

datetime.timedelta(0, 60)

2855

>>> string_to_delta('60m')

2856

datetime.timedelta(0, 3600)

2857

>>> string_to_delta('24h')

2858

datetime.timedelta(1)

2859

>>> string_to_delta('1w')

2860

datetime.timedelta(7)

2861

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

2862

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

2863

2948

"""

2864

2949

2865

2950

try:

2967

3052

2968

3053

options = parser.parse_args()

2969

3054

2970

if options.check:

2971

import doctest

2972

fail_count, test_count = doctest.testmod()

2973

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

2974

2975

3055

# Default values for config file for server-global settings

2976

3056

if gnutls.has_rawpk:

2977

3057

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

2997

3077

del priority

2998

3078

2999

3079

# Parse config file for server-global settings

3000

server_config = configparser.SafeConfigParser(server_defaults)

3080

server_config = configparser.ConfigParser(server_defaults)

3001

3081

del server_defaults

3002

3082

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

3003

# Convert the SafeConfigParser object to a dict

3083

# Convert the ConfigParser object to a dict

3004

3084

server_settings = server_config.defaults()

3005

3085

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

3006

3086

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

3073

3153

3074

3154

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

3075

3155

syslogger.setFormatter(

3076

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

3077

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

3156

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

3157

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

3078

3158

server_settings["servicename"])))

3079

3159

3080

3160

# Parse config file with clients

3081

client_config = configparser.SafeConfigParser(Client

3082

.client_defaults)

3161

client_config = configparser.ConfigParser(Client.client_defaults)

3083

3162

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

3084

3163

"clients.conf"))

3085

3164

3105

3184

try:

3106

3185

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

3107

3186

except IOError as e:

3108

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

3109

exc_info=e)

3187

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

3188

exc_info=e)

3110

3189

3111

3190

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

3112

3191

("mandos", "mandos"),

3123

3202

try:

3124

3203

os.setgid(gid)

3125

3204

os.setuid(uid)

3126

if debug:

3127

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

3128

gid))

3205

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

3129

3206

except OSError as error:

3130

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

3131

.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))

3132

3209

if error.errno != errno.EPERM:

3133

3210

raise

3134

3211

3141

3218

3142

3219

@gnutls.log_func

3143

3220

def debug_gnutls(level, string):

3144

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

3221

log.debug("GnuTLS: %s",

3222

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

3145

3223

3146

3224

gnutls.global_set_log_function(debug_gnutls)

3147

3225

3156

3234

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

3157

3235

daemon()

3158

3236

3159

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

3160

# to inform GLib that threads will be used.

3161

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()

3162

3241

3163

3242

global main_loop

3164

3243

# From the Avahi example code

3175

3254

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

3176

3255

do_not_queue=True)

3177

3256

except dbus.exceptions.DBusException as e:

3178

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

3257

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

3179

3258

use_dbus = False

3180

3259

server_settings["use_dbus"] = False

3181

3260

tcp_server.use_dbus = False

3240

3319

if isinstance(s, bytes)

3241

3320

else s) for s in

3242

3321

value["client_structure"]]

3243

# .name & .host

3244

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

3322

# .name, .host, and .checker_command

3323

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

3245

3324

if isinstance(value[k], bytes):

3246

3325

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

3247

if not value.has_key("key_id"):

3326

if "key_id" not in value:

3248

3327

value["key_id"] = ""

3249

elif not value.has_key("fingerprint"):

3328

elif "fingerprint" not in value:

3250

3329

value["fingerprint"] = ""

3251

3330

# old_client_settings

3252

3331

# .keys()

3257

3336

for key, value in

3258

3337

bytes_old_client_settings.items()}

3259

3338

del bytes_old_client_settings

3260

# .host

3339

# .host and .checker_command

3261

3340

for value in old_client_settings.values():

3262

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

3263

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

3264

.decode("utf-8"))

3341

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

3342

if isinstance(value[attribute], bytes):

3343

value[attribute] = (value[attribute]

3344

.decode("utf-8"))

3265

3345

os.remove(stored_state_path)

3266

3346

except IOError as e:

3267

3347

if e.errno == errno.ENOENT:

3268

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

3269

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

3348

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

3349

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

3270

3350

else:

3271

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

3272

exc_info=e)

3351

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

3352

exc_info=e)

3273

3353

raise

3274

3354

except EOFError as e:

3275

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

3276

"EOFError:",

3277

exc_info=e)

3355

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

3356

exc_info=e)

3278

3357

3279

3358

with PGPEngine() as pgp:

3280

3359

for client_name, client in clients_data.items():

3307

3386

if client["enabled"]:

3308

3387

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

3309

3388

if not client["last_checked_ok"]:

3310

logger.warning(

3311

"disabling client {} - Client never "

3312

"performed a successful checker".format(

3313

client_name))

3389

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

3390

" never performed a successful"

3391

" checker", client_name)

3314

3392

client["enabled"] = False

3315

3393

elif client["last_checker_status"] != 0:

3316

logger.warning(

3317

"disabling client {} - Client last"

3318

" checker failed with error code"

3319

" {}".format(

3320

client_name,

3321

client["last_checker_status"]))

3394

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

3395

" last checker failed with error"

3396

" code %s", client_name,

3397

client["last_checker_status"])

3322

3398

client["enabled"] = False

3323

3399

else:

3324

3400

client["expires"] = (

3325

3401

datetime.datetime.utcnow()

3326

3402

+ client["timeout"])

3327

logger.debug("Last checker succeeded,"

3328

" keeping {} enabled".format(

3329

client_name))

3403

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

3404

" enabled", client_name)

3330

3405

try:

3331

3406

client["secret"] = pgp.decrypt(

3332

3407

client["encrypted_secret"],

3333

3408

client_settings[client_name]["secret"])

3334

3409

except PGPError:

3335

3410

# If decryption fails, we use secret from new settings

3336

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

3337

client_name))

3411

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

3412

client_name)

3338

3413

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

3339

3414

["secret"])

3340

3415

3354

3429

server_settings=server_settings)

3355

3430

3356

3431

if not tcp_server.clients:

3357

logger.warning("No clients defined")

3432

log.warning("No clients defined")

3358

3433

3359

3434

if not foreground:

3360

3435

if pidfile is not None:

3363

3438

with pidfile:

3364

3439

print(pid, file=pidfile)

3365

3440

except IOError:

3366

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

3367

pidfilename, pid)

3441

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

3442

pidfilename, pid)

3368

3443

del pidfile

3369

3444

del pidfilename

3370

3445

3520

3595

3521

3596

try:

3522

3597

with tempfile.NamedTemporaryFile(

3523

mode='wb',

3598

mode="wb",

3524

3599

suffix=".pickle",

3525

prefix='clients-',

3600

prefix="clients-",

3526

3601

dir=os.path.dirname(stored_state_path),

3527

3602

delete=False) as stored_state:

3528

3603

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

3536

3611

except NameError:

3537

3612

pass

3538

3613

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

3539

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

3540

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

3614

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

3615

os.strerror(e.errno))

3541

3616

else:

3542

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

3543

exc_info=e)

3617

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

3618

exc_info=e)

3544

3619

raise

3545

3620

3546

3621

# Delete all clients, and settings from config

3563

3638

mandos_dbus_service.client_added_signal(client)

3564

3639

# Need to initiate checking of clients

3565

3640

if client.enabled:

3566

client.init_checker()

3641

client.init_checker(randomize_start=True)

3567

3642

3568

3643

tcp_server.enable()

3569

3644

tcp_server.server_activate()

3572

3647

if zeroconf:

3573

3648

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

3574

3649

if use_ipv6:

3575

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

3576

" flowinfo %d, scope_id %d",

3577

*tcp_server.socket.getsockname())

3650

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

3651

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

3578

3652

else: # IPv4

3579

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

3580

*tcp_server.socket.getsockname())

3653

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

3654

*tcp_server.socket.getsockname())

3581

3655

3582

3656

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

3583

3657

3587

3661

try:

3588

3662

service.activate()

3589

3663

except dbus.exceptions.DBusException as error:

3590

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

3664

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

3591

3665

cleanup()

3592

3666

sys.exit(1)

3593

3667

# End of Avahi example code

3594

3668

3595

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

3596

lambda *args, **kwargs:

3597

(tcp_server.handle_request

3598

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

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))

3599

3674

3600

logger.debug("Starting main loop")

3675

log.debug("Starting main loop")

3601

3676

main_loop.run()

3602

3677

except AvahiError as error:

3603

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

3678

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

3604

3679

cleanup()

3605

3680

sys.exit(1)

3606

3681

except KeyboardInterrupt:

3607

3682

if debug:

3608

3683

print("", file=sys.stderr)

3609

logger.debug("Server received KeyboardInterrupt")

3610

logger.debug("Server exiting")

3684

log.debug("Server received KeyboardInterrupt")

3685

log.debug("Server exiting")

3611

3686

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

3612

3687

cleanup()

3613

3688

3614

3615

if __name__ == '__main__':

3616

main()

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: