/mandos/trunk : revision 1260

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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 = "1.8.14"

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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",

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str(error))

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

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str(error))

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

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def cleanup(self):

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

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

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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."""

508

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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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570

_fields_ = []

544

573

certificate_type_t = ctypes.c_int

545

574

546

575

class datum_t(ctypes.Structure):

547

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

548

('size', ctypes.c_uint)]

576

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

577

("size", ctypes.c_uint)]

549

578

550

class openpgp_crt_int(ctypes.Structure):

579

class _openpgp_crt_int(ctypes.Structure):

551

580

_fields_ = []

552

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

581

openpgp_crt_t = ctypes.POINTER(_openpgp_crt_int)

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582

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

554

583

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

555

584

credentials_type_t = ctypes.c_int

564

593

# gnutls.strerror()

565

594

self.code = code

566

595

if message is None and code is not None:

567

message = gnutls.strerror(code)

596

message = gnutls.strerror(code).decode(

597

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

568

598

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

569

599

message, *args)

570

600

571

601

class CertificateSecurityError(Error):

572

602

pass

573

603

604

class PointerTo:

605

def __init__(self, cls):

606

self.cls = cls

607

608

def from_param(self, obj):

609

if not isinstance(obj, self.cls):

610

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

611

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

612

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

613

614

class CastToVoidPointer:

615

def __init__(self, cls):

616

self.cls = cls

617

618

def from_param(self, obj):

619

if not isinstance(obj, self.cls):

620

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

621

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

622

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

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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

643

if gnutls.check_version(b"3.5.6"):

590

644

gnutls_flags |= gnutls.NO_TICKETS

591

645

if gnutls.has_rawpk:

592

646

gnutls_flags |= gnutls.ENABLE_RAWPK

593

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

647

gnutls.init(self, gnutls_flags)

594

648

del gnutls_flags

595

gnutls.set_default_priority(self._c_object)

596

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

597

gnutls.handshake_set_private_extensions(self._c_object,

598

True)

649

gnutls.set_default_priority(self)

650

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

651

gnutls.handshake_set_private_extensions(self, True)

599

652

self.socket = socket

600

653

if credentials is None:

601

654

credentials = gnutls.Credentials()

602

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

603

ctypes.cast(credentials._c_object,

604

ctypes.c_void_p))

655

gnutls.credentials_set(self, credentials.type,

656

credentials)

605

657

self.credentials = credentials

606

658

607

659

def __del__(self):

608

gnutls.deinit(self._c_object)

660

gnutls.deinit(self)

609

661

610

662

def handshake(self):

611

return gnutls.handshake(self._c_object)

663

return gnutls.handshake(self)

612

664

613

665

def send(self, data):

614

666

data = bytes(data)

615

667

data_len = len(data)

616

668

while data_len > 0:

617

data_len -= gnutls.record_send(self._c_object,

618

data[-data_len:],

669

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

619

670

data_len)

620

671

621

672

def bye(self):

622

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

673

return gnutls.bye(self, gnutls.SHUT_RDWR)

623

674

624

675

# Error handling functions

625

676

def _error_code(result):

626

677

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

627

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

628

if result >= 0:

678

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

679

if result >= gnutls.E_SUCCESS:

629

680

return result

630

681

if result == gnutls.E_NO_CERTIFICATE_FOUND:

631

682

raise gnutls.CertificateSecurityError(code=result)

632

683

raise gnutls.Error(code=result)

633

684

634

def _retry_on_error(result, func, arguments):

685

def _retry_on_error(result, func, arguments,

686

_error_code=_error_code):

635

687

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

636

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

637

while result < 0:

688

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

689

while result < gnutls.E_SUCCESS:

638

690

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

639

691

return _error_code(result)

640

692

result = func(*arguments)

645

697

646

698

# Functions

647

699

priority_set_direct = _library.gnutls_priority_set_direct

648

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

700

priority_set_direct.argtypes = [ClientSession, ctypes.c_char_p,

649

701

ctypes.POINTER(ctypes.c_char_p)]

650

702

priority_set_direct.restype = _error_code

651

703

652

704

init = _library.gnutls_init

653

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

705

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

654

706

init.restype = _error_code

655

707

656

708

set_default_priority = _library.gnutls_set_default_priority

657

set_default_priority.argtypes = [session_t]

709

set_default_priority.argtypes = [ClientSession]

658

710

set_default_priority.restype = _error_code

659

711

660

712

record_send = _library.gnutls_record_send

661

record_send.argtypes = [session_t, ctypes.c_void_p,

713

record_send.argtypes = [ClientSession, ctypes.c_void_p,

662

714

ctypes.c_size_t]

663

715

record_send.restype = ctypes.c_ssize_t

664

716

record_send.errcheck = _retry_on_error

666

718

certificate_allocate_credentials = (

667

719

_library.gnutls_certificate_allocate_credentials)

668

720

certificate_allocate_credentials.argtypes = [

669

ctypes.POINTER(certificate_credentials_t)]

721

PointerTo(Credentials)]

670

722

certificate_allocate_credentials.restype = _error_code

671

723

672

724

certificate_free_credentials = (

673

725

_library.gnutls_certificate_free_credentials)

674

certificate_free_credentials.argtypes = [

675

certificate_credentials_t]

726

certificate_free_credentials.argtypes = [Credentials]

676

727

certificate_free_credentials.restype = None

677

728

678

729

handshake_set_private_extensions = (

679

730

_library.gnutls_handshake_set_private_extensions)

680

handshake_set_private_extensions.argtypes = [session_t,

731

handshake_set_private_extensions.argtypes = [ClientSession,

681

732

ctypes.c_int]

682

733

handshake_set_private_extensions.restype = None

683

734

684

735

credentials_set = _library.gnutls_credentials_set

685

credentials_set.argtypes = [session_t, credentials_type_t,

686

ctypes.c_void_p]

736

credentials_set.argtypes = [ClientSession, credentials_type_t,

737

CastToVoidPointer(Credentials)]

687

738

credentials_set.restype = _error_code

688

739

689

740

strerror = _library.gnutls_strerror

691

742

strerror.restype = ctypes.c_char_p

692

743

693

744

certificate_type_get = _library.gnutls_certificate_type_get

694

certificate_type_get.argtypes = [session_t]

745

certificate_type_get.argtypes = [ClientSession]

695

746

certificate_type_get.restype = _error_code

696

747

697

748

certificate_get_peers = _library.gnutls_certificate_get_peers

698

certificate_get_peers.argtypes = [session_t,

749

certificate_get_peers.argtypes = [ClientSession,

699

750

ctypes.POINTER(ctypes.c_uint)]

700

751

certificate_get_peers.restype = ctypes.POINTER(datum_t)

701

752

708

759

global_set_log_function.restype = None

709

760

710

761

deinit = _library.gnutls_deinit

711

deinit.argtypes = [session_t]

762

deinit.argtypes = [ClientSession]

712

763

deinit.restype = None

713

764

714

765

handshake = _library.gnutls_handshake

715

handshake.argtypes = [session_t]

716

handshake.restype = _error_code

766

handshake.argtypes = [ClientSession]

767

handshake.restype = ctypes.c_int

717

768

handshake.errcheck = _retry_on_error

718

769

719

770

transport_set_ptr = _library.gnutls_transport_set_ptr

720

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

771

transport_set_ptr.argtypes = [ClientSession, transport_ptr_t]

721

772

transport_set_ptr.restype = None

722

773

723

774

bye = _library.gnutls_bye

724

bye.argtypes = [session_t, close_request_t]

725

bye.restype = _error_code

775

bye.argtypes = [ClientSession, close_request_t]

776

bye.restype = ctypes.c_int

726

777

bye.errcheck = _retry_on_error

727

778

728

779

check_version = _library.gnutls_check_version

745

796

746

797

x509_crt_fmt_t = ctypes.c_int

747

798

748

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

799

# All the function declarations below are from

800

# gnutls/abstract.h

749

801

pubkey_init = _library.gnutls_pubkey_init

750

802

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

751

803

pubkey_init.restype = _error_code

765

817

pubkey_deinit.argtypes = [pubkey_t]

766

818

pubkey_deinit.restype = None

767

819

else:

768

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

820

# All the function declarations below are from

821

# gnutls/openpgp.h

769

822

770

823

openpgp_crt_init = _library.gnutls_openpgp_crt_init

771

824

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

777

830

openpgp_crt_fmt_t]

778

831

openpgp_crt_import.restype = _error_code

779

832

780

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

781

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

782

ctypes.POINTER(ctypes.c_uint)]

833

openpgp_crt_verify_self = \

834

_library.gnutls_openpgp_crt_verify_self

835

openpgp_crt_verify_self.argtypes = [

836

openpgp_crt_t,

837

ctypes.c_uint,

838

ctypes.POINTER(ctypes.c_uint),

839

]

783

840

openpgp_crt_verify_self.restype = _error_code

784

841

785

842

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

796

853

797

854

if check_version(b"3.6.4"):

798

855

certificate_type_get2 = _library.gnutls_certificate_type_get2

799

certificate_type_get2.argtypes = [session_t, ctypes.c_int]

856

certificate_type_get2.argtypes = [ClientSession, ctypes.c_int]

800

857

certificate_type_get2.restype = _error_code

801

858

802

859

# Remove non-public functions

814

871

connection.close()

815

872

816

873

817

class Client(object):

874

class Client:

818

875

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

819

876

820

877

Attributes:

821

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

878

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

822

879

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

823

880

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

824

881

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

825

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

882

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

826

883

running.

827

884

checker_callback_tag: a GLib event source tag, or None

828

885

checker_command: string; External command which is run to check

952

1009

self.last_enabled = None

953

1010

self.expires = None

954

1011

955

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

956

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

957

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

1012

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

1013

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

1014

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

958

1015

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

959

1016

datetime.datetime.utcnow())

960

1017

999

1056

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

1000

1057

return False

1001

1058

if not quiet:

1002

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

1059

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

1003

1060

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

1004

1061

GLib.source_remove(self.disable_initiator_tag)

1005

1062

self.disable_initiator_tag = None

1023

1080

if self.checker_initiator_tag is not None:

1024

1081

GLib.source_remove(self.checker_initiator_tag)

1025

1082

self.checker_initiator_tag = GLib.timeout_add(

1026

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

1083

random.randrange(int(self.interval.total_seconds() * 1000

1084

+ 1)),

1027

1085

self.start_checker)

1028

1086

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

1029

1087

if self.disable_initiator_tag is not None:

1039

1097

# Read return code from connection (see call_pipe)

1040

1098

returncode = connection.recv()

1041

1099

connection.close()

1042

self.checker.join()

1100

if self.checker is not None:

1101

self.checker.join()

1043

1102

self.checker_callback_tag = None

1044

1103

self.checker = None

1045

1104

1047

1106

self.last_checker_status = returncode

1048

1107

self.last_checker_signal = None

1049

1108

if self.last_checker_status == 0:

1050

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

1051

vars(self))

1109

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

1052

1110

self.checked_ok()

1053

1111

else:

1054

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

1112

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

1055

1113

else:

1056

1114

self.last_checker_status = -1

1057

1115

self.last_checker_signal = -returncode

1058

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

1059

vars(self))

1116

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

1060

1117

return False

1061

1118

1062

1119

def checked_ok(self):

1096

1153

# should be.

1097

1154

1098

1155

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

1099

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

1156

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

1100

1157

self.checker.join()

1101

1158

self.checker = None

1102

1159

# Start a new checker if needed

1103

1160

if self.checker is None:

1104

1161

# Escape attributes for the shell

1105

1162

escaped_attrs = {

1106

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

1163

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

1107

1164

for attr in self.runtime_expansions}

1108

1165

try:

1109

1166

command = self.checker_command % escaped_attrs

1110

1167

except TypeError as error:

1111

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

1112

self.checker_command,

1113

exc_info=error)

1168

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

1169

self.checker_command, exc_info=error)

1114

1170

return True # Try again later

1115

1171

self.current_checker_command = command

1116

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

1117

self.name)

1172

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

1118

1173

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

1119

1174

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

1120

1175

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

1136

1191

kwargs=popen_args)

1137

1192

self.checker.start()

1138

1193

self.checker_callback_tag = GLib.io_add_watch(

1139

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

1194

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

1195

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

1140

1196

self.checker_callback, pipe[0], command)

1141

1197

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

1142

1198

return True

1148

1204

self.checker_callback_tag = None

1149

1205

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

1150

1206

return

1151

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

1207

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

1152

1208

self.checker.terminate()

1153

1209

self.checker = None

1154

1210

1181

1237

func._dbus_name = func.__name__

1182

1238

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

1183

1239

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

1184

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

1240

func._dbus_get_args_options = {"byte_arrays": byte_arrays}

1185

1241

return func

1186

1242

1187

1243

return decorator

1276

1332

1277

1333

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1278

1334

out_signature="s",

1279

path_keyword='object_path',

1280

connection_keyword='connection')

1335

path_keyword="object_path",

1336

connection_keyword="connection")

1281

1337

def Introspect(self, object_path, connection):

1282

1338

"""Overloading of standard D-Bus method.

1283

1339

1332

1388

document.unlink()

1333

1389

except (AttributeError, xml.dom.DOMException,

1334

1390

xml.parsers.expat.ExpatError) as error:

1335

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

1336

exc_info=error)

1391

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

1392

exc_info=error)

1337

1393

return xmlstring

1338

1394

1339

1395

1397

1453

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

1398

1454

"'ay' signature {!r}"

1399

1455

.format(prop._dbus_signature))

1400

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

1401

for byte in value))

1456

value = dbus.ByteArray(bytes(value))

1402

1457

prop(value)

1403

1458

1404

1459

@dbus.service.method(dbus.PROPERTIES_IFACE,

1437

1492

1438

1493

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1439

1494

out_signature="s",

1440

path_keyword='object_path',

1441

connection_keyword='connection')

1495

path_keyword="object_path",

1496

connection_keyword="connection")

1442

1497

def Introspect(self, object_path, connection):

1443

1498

"""Overloading of standard D-Bus method.

1444

1499

1500

1555

document.unlink()

1501

1556

except (AttributeError, xml.dom.DOMException,

1502

1557

xml.parsers.expat.ExpatError) as error:

1503

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

1504

exc_info=error)

1558

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

1559

exc_info=error)

1505

1560

return xmlstring

1506

1561

1507

1562

1539

1594

1540

1595

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1541

1596

out_signature="s",

1542

path_keyword='object_path',

1543

connection_keyword='connection')

1597

path_keyword="object_path",

1598

connection_keyword="connection")

1544

1599

def Introspect(self, object_path, connection):

1545

1600

"""Overloading of standard D-Bus method.

1546

1601

1571

1626

document.unlink()

1572

1627

except (AttributeError, xml.dom.DOMException,

1573

1628

xml.parsers.expat.ExpatError) as error:

1574

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

1575

exc_info=error)

1629

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

1630

exc_info=error)

1576

1631

return xmlstring

1577

1632

1578

1633

2209

2264

del _interface

2210

2265

2211

2266

2212

class ProxyClient(object):

2267

class ProxyClient:

2213

2268

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

2214

2269

self._pipe = child_pipe

2215

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

2270

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

2216

2271

if not self._pipe.recv():

2217

2272

raise KeyError(key_id or fpr)

2218

2273

2219

2274

def __getattribute__(self, name):

2220

if name == '_pipe':

2275

if name == "_pipe":

2221

2276

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

2222

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

2277

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

2223

2278

data = self._pipe.recv()

2224

if data[0] == 'data':

2279

if data[0] == "data":

2225

2280

return data[1]

2226

if data[0] == 'function':

2281

if data[0] == "function":

2227

2282

2228

2283

def func(*args, **kwargs):

2229

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

2284

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

2230

2285

return self._pipe.recv()[1]

2231

2286

2232

2287

return func

2233

2288

2234

2289

def __setattr__(self, name, value):

2235

if name == '_pipe':

2290

if name == "_pipe":

2236

2291

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

2237

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

2292

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

2238

2293

2239

2294

2240

2295

class ClientHandler(socketserver.BaseRequestHandler, object):

2245

2300

2246

2301

def handle(self):

2247

2302

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

2248

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

2249

str(self.client_address))

2250

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

2251

self.server.child_pipe.fileno())

2303

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

2304

str(self.client_address))

2305

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

2252

2306

2253

2307

session = gnutls.ClientSession(self.request)

2254

2308

2255

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

2309

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

2256

2310

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

2257

2311

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

2258

2312

# "+DHE-DSS"))

2260

2314

priority = self.server.gnutls_priority

2261

2315

if priority is None:

2262

2316

priority = "NORMAL"

2263

gnutls.priority_set_direct(session._c_object,

2264

priority.encode("utf-8"),

2265

None)

2317

gnutls.priority_set_direct(session,

2318

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

2266

2319

2267

2320

# Start communication using the Mandos protocol

2268

2321

# Get protocol number

2269

2322

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

2270

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

2323

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

2271

2324

try:

2272

2325

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

2273

2326

raise RuntimeError(line)

2274

2327

except (ValueError, IndexError, RuntimeError) as error:

2275

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

2328

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

2276

2329

return

2277

2330

2278

2331

# Start GnuTLS connection

2279

2332

try:

2280

2333

session.handshake()

2281

2334

except gnutls.Error as error:

2282

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

2335

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

2283

2336

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

2284

2337

# established. Just abandon the request.

2285

2338

return

2286

logger.debug("Handshake succeeded")

2339

log.debug("Handshake succeeded")

2287

2340

2288

2341

approval_required = False

2289

2342

try:

2293

2346

key_id = self.key_id(

2294

2347

self.peer_certificate(session))

2295

2348

except (TypeError, gnutls.Error) as error:

2296

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

2349

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

2297

2350

return

2298

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

2351

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

2352

key_id.decode("utf-8",

2353

errors="replace"))

2299

2354

2300

2355

else:

2301

2356

key_id = b""

2303

2358

fpr = self.fingerprint(

2304

2359

self.peer_certificate(session))

2305

2360

except (TypeError, gnutls.Error) as error:

2306

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

2361

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

2307

2362

return

2308

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

2363

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

2309

2364

2310

2365

try:

2311

2366

client = ProxyClient(child_pipe, key_id, fpr,

2320

2375

2321

2376

while True:

2322

2377

if not client.enabled:

2323

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

2324

client.name)

2378

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

2325

2379

if self.server.use_dbus:

2326

2380

# Emit D-Bus signal

2327

2381

client.Rejected("Disabled")

2331

2385

# We are approved or approval is disabled

2332

2386

break

2333

2387

elif client.approved is None:

2334

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

2335

client.name)

2388

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

2389

client.name)

2336

2390

if self.server.use_dbus:

2337

2391

# Emit D-Bus signal

2338

2392

client.NeedApproval(

2339

2393

client.approval_delay.total_seconds()

2340

2394

* 1000, client.approved_by_default)

2341

2395

else:

2342

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

2343

client.name)

2396

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

2397

client.name)

2344

2398

if self.server.use_dbus:

2345

2399

# Emit D-Bus signal

2346

2400

client.Rejected("Denied")

2354

2408

time2 = datetime.datetime.now()

2355

2409

if (time2 - time) >= delay:

2356

2410

if not client.approved_by_default:

2357

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

2358

" waiting for approval",

2359

client.name)

2411

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

2412

" waiting for approval",

2413

client.name)

2360

2414

if self.server.use_dbus:

2361

2415

# Emit D-Bus signal

2362

2416

client.Rejected("Approval timed out")

2369

2423

try:

2370

2424

session.send(client.secret)

2371

2425

except gnutls.Error as error:

2372

logger.warning("gnutls send failed",

2373

exc_info=error)

2426

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

2374

2427

return

2375

2428

2376

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

2429

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

2377

2430

# bump the timeout using extended_timeout

2378

2431

client.bump_timeout(client.extended_timeout)

2379

2432

if self.server.use_dbus:

2386

2439

try:

2387

2440

session.bye()

2388

2441

except gnutls.Error as error:

2389

logger.warning("GnuTLS bye failed",

2390

exc_info=error)

2442

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

2391

2443

2392

2444

@staticmethod

2393

2445

def peer_certificate(session):

2394

2446

"Return the peer's certificate as a bytestring"

2395

2447

try:

2396

cert_type = gnutls.certificate_type_get2(session._c_object,

2397

gnutls.CTYPE_PEERS)

2448

cert_type = gnutls.certificate_type_get2(

2449

session, gnutls.CTYPE_PEERS)

2398

2450

except AttributeError:

2399

cert_type = gnutls.certificate_type_get(session._c_object)

2451

cert_type = gnutls.certificate_type_get(session)

2400

2452

if gnutls.has_rawpk:

2401

2453

valid_cert_types = frozenset((gnutls.CRT_RAWPK,))

2402

2454

else:

2403

2455

valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))

2404

2456

# If not a valid certificate type...

2405

2457

if cert_type not in valid_cert_types:

2406

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

2407

valid_cert_types)

2458

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

2459

valid_cert_types)

2408

2460

# ...return invalid data

2409

2461

return b""

2410

2462

list_size = ctypes.c_uint(1)

2411

2463

cert_list = (gnutls.certificate_get_peers

2412

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

2464

(session, ctypes.byref(list_size)))

2413

2465

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

2414

2466

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

2415

2467

if list_size.value == 0:

2437

2489

buf = ctypes.create_string_buffer(32)

2438

2490

buf_len = ctypes.c_size_t(len(buf))

2439

2491

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

2440

gnutls.pubkey_get_key_id(pubkey,

2441

gnutls.KEYID_USE_SHA256,

2442

ctypes.cast(ctypes.byref(buf),

2443

ctypes.POINTER(ctypes.c_ubyte)),

2444

ctypes.byref(buf_len))

2492

gnutls.pubkey_get_key_id(

2493

pubkey,

2494

gnutls.KEYID_USE_SHA256,

2495

ctypes.cast(ctypes.byref(buf),

2496

ctypes.POINTER(ctypes.c_ubyte)),

2497

ctypes.byref(buf_len))

2445

2498

# Deinit the certificate

2446

2499

gnutls.pubkey_deinit(pubkey)

2447

2500

2488

2541

return hex_fpr

2489

2542

2490

2543

2491

class MultiprocessingMixIn(object):

2544

class MultiprocessingMixIn:

2492

2545

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

2493

2546

2494

2547

def sub_process_main(self, request, address):

2506

2559

return proc

2507

2560

2508

2561

2509

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2562

class MultiprocessingMixInWithPipe(MultiprocessingMixIn):

2510

2563

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

2511

2564

2512

2565

def process_request(self, request, client_address):

2527

2580

2528

2581

2529

2582

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2530

socketserver.TCPServer, object):

2531

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

2583

socketserver.TCPServer):

2584

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

2532

2585

2533

2586

Attributes:

2534

2587

enabled: Boolean; whether this server is activated yet

2585

2638

if SO_BINDTODEVICE is None:

2586

2639

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

2587

2640

# common enough.

2588

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

2641

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

2589

2642

SO_BINDTODEVICE = 25

2590

2643

try:

2591

2644

self.socket.setsockopt(

2593

2646

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

2594

2647

except socket.error as error:

2595

2648

if error.errno == errno.EPERM:

2596

logger.error("No permission to bind to"

2597

" interface %s", self.interface)

2649

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

2650

self.interface)

2598

2651

elif error.errno == errno.ENOPROTOOPT:

2599

logger.error("SO_BINDTODEVICE not available;"

2600

" cannot bind to interface %s",

2601

self.interface)

2652

log.error("SO_BINDTODEVICE not available; cannot"

2653

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

2602

2654

elif error.errno == errno.ENODEV:

2603

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

2604

" cannot bind", self.interface)

2655

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

2656

" bind", self.interface)

2605

2657

else:

2606

2658

raise

2607

2659

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

2666

2718

def add_pipe(self, parent_pipe, proc):

2667

2719

# Call "handle_ipc" for both data and EOF events

2668

2720

GLib.io_add_watch(

2669

parent_pipe.fileno(),

2670

GLib.IO_IN | GLib.IO_HUP,

2721

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

2722

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

2671

2723

functools.partial(self.handle_ipc,

2672

2724

parent_pipe=parent_pipe,

2673

2725

proc=proc))

2686

2738

request = parent_pipe.recv()

2687

2739

command = request[0]

2688

2740

2689

if command == 'init':

2741

if command == "init":

2690

2742

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

2691

2743

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

2692

2744

address = request[3]

2693

2745

2694

2746

for c in self.clients.values():

2695

if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":

2747

if key_id == ("E3B0C44298FC1C149AFBF4C8996FB924"

2748

"27AE41E4649B934CA495991B7852B855"):

2696

2749

continue

2697

2750

if key_id and c.key_id == key_id:

2698

2751

client = c

2701

2754

client = c

2702

2755

break

2703

2756

else:

2704

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

2705

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

2757

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

2758

" %s", key_id or fpr, address)

2706

2759

if self.use_dbus:

2707

2760

# Emit D-Bus signal

2708

2761

mandos_dbus_service.ClientNotFound(key_id or fpr,

2711

2764

return False

2712

2765

2713

2766

GLib.io_add_watch(

2714

parent_pipe.fileno(),

2715

GLib.IO_IN | GLib.IO_HUP,

2767

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

2768

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

2716

2769

functools.partial(self.handle_ipc,

2717

2770

parent_pipe=parent_pipe,

2718

2771

proc=proc,

2721

2774

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

2722

2775

# same fileno

2723

2776

return False

2724

if command == 'funcall':

2777

if command == "funcall":

2725

2778

funcname = request[1]

2726

2779

args = request[2]

2727

2780

kwargs = request[3]

2728

2781

2729

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

2782

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

2730

2783

funcname)(*args,

2731

2784

**kwargs)))

2732

2785

2733

if command == 'getattr':

2786

if command == "getattr":

2734

2787

attrname = request[1]

2735

2788

if isinstance(client_object.__getattribute__(attrname),

2736

collections.Callable):

2737

parent_pipe.send(('function', ))

2789

collections.abc.Callable):

2790

parent_pipe.send(("function", ))

2738

2791

else:

2739

2792

parent_pipe.send((

2740

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

2793

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

2741

2794

2742

if command == 'setattr':

2795

if command == "setattr":

2743

2796

attrname = request[1]

2744

2797

value = request[2]

2745

2798

setattr(client_object, attrname, value)

2750

2803

def rfc3339_duration_to_delta(duration):

2751

2804

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

2752

2805

2753

>>> rfc3339_duration_to_delta("P7D")

2754

datetime.timedelta(7)

2755

>>> rfc3339_duration_to_delta("PT60S")

2756

datetime.timedelta(0, 60)

2757

>>> rfc3339_duration_to_delta("PT60M")

2758

datetime.timedelta(0, 3600)

2759

>>> rfc3339_duration_to_delta("PT24H")

2760

datetime.timedelta(1)

2761

>>> rfc3339_duration_to_delta("P1W")

2762

datetime.timedelta(7)

2763

>>> rfc3339_duration_to_delta("PT5M30S")

2764

datetime.timedelta(0, 330)

2765

>>> rfc3339_duration_to_delta("P1DT3M20S")

2766

datetime.timedelta(1, 200)

2806

>>> timedelta = datetime.timedelta

2807

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

2808

True

2809

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

2810

True

2811

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

2812

True

2813

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

2814

True

2815

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

2816

True

2817

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

2818

True

2819

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

2820

True

2821

>>> del timedelta

2767

2822

"""

2768

2823

2769

2824

# Parsing an RFC 3339 duration with regular expressions is not

2849

2904

def string_to_delta(interval):

2850

2905

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

2851

2906

2852

>>> string_to_delta('7d')

2853

datetime.timedelta(7)

2854

>>> string_to_delta('60s')

2855

datetime.timedelta(0, 60)

2856

>>> string_to_delta('60m')

2857

datetime.timedelta(0, 3600)

2858

>>> string_to_delta('24h')

2859

datetime.timedelta(1)

2860

>>> string_to_delta('1w')

2861

datetime.timedelta(7)

2862

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

2863

datetime.timedelta(0, 330)

2907

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

2908

True

2909

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

2910

True

2911

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

2912

True

2913

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

2914

True

2915

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

2916

True

2917

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

2918

True

2864

2919

"""

2865

2920

2866

2921

try:

2968

3023

2969

3024

options = parser.parse_args()

2970

3025

2971

if options.check:

2972

import doctest

2973

fail_count, test_count = doctest.testmod()

2974

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

2975

2976

3026

# Default values for config file for server-global settings

2977

3027

if gnutls.has_rawpk:

2978

3028

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

2998

3048

del priority

2999

3049

3000

3050

# Parse config file for server-global settings

3001

server_config = configparser.SafeConfigParser(server_defaults)

3051

server_config = configparser.ConfigParser(server_defaults)

3002

3052

del server_defaults

3003

3053

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

3004

# Convert the SafeConfigParser object to a dict

3054

# Convert the ConfigParser object to a dict

3005

3055

server_settings = server_config.defaults()

3006

3056

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

3007

3057

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

3074

3124

3075

3125

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

3076

3126

syslogger.setFormatter(

3077

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

3078

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

3127

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

3128

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

3079

3129

server_settings["servicename"])))

3080

3130

3081

3131

# Parse config file with clients

3082

client_config = configparser.SafeConfigParser(Client

3083

.client_defaults)

3132

client_config = configparser.ConfigParser(Client.client_defaults)

3084

3133

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

3085

3134

"clients.conf"))

3086

3135

3106

3155

try:

3107

3156

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

3108

3157

except IOError as e:

3109

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

3110

exc_info=e)

3158

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

3159

exc_info=e)

3111

3160

3112

3161

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

3113

3162

("mandos", "mandos"),

3124

3173

try:

3125

3174

os.setgid(gid)

3126

3175

os.setuid(uid)

3127

if debug:

3128

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

3129

gid))

3176

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

3130

3177

except OSError as error:

3131

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

3132

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

3178

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

3179

os.strerror(error.errno))

3133

3180

if error.errno != errno.EPERM:

3134

3181

raise

3135

3182

3142

3189

3143

3190

@gnutls.log_func

3144

3191

def debug_gnutls(level, string):

3145

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

3192

log.debug("GnuTLS: %s",

3193

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

3146

3194

3147

3195

gnutls.global_set_log_function(debug_gnutls)

3148

3196

3157

3205

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

3158

3206

daemon()

3159

3207

3160

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

3161

# to inform GLib that threads will be used.

3162

GLib.threads_init()

3208

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

3209

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

3210

# need to inform GLib that threads will be used.

3211

GLib.threads_init()

3163

3212

3164

3213

global main_loop

3165

3214

# From the Avahi example code

3176

3225

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

3177

3226

do_not_queue=True)

3178

3227

except dbus.exceptions.DBusException as e:

3179

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

3228

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

3180

3229

use_dbus = False

3181

3230

server_settings["use_dbus"] = False

3182

3231

tcp_server.use_dbus = False

3241

3290

if isinstance(s, bytes)

3242

3291

else s) for s in

3243

3292

value["client_structure"]]

3244

# .name & .host

3245

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

3293

# .name, .host, and .checker_command

3294

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

3246

3295

if isinstance(value[k], bytes):

3247

3296

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

3248

3297

if "key_id" not in value:

3258

3307

for key, value in

3259

3308

bytes_old_client_settings.items()}

3260

3309

del bytes_old_client_settings

3261

# .host

3310

# .host and .checker_command

3262

3311

for value in old_client_settings.values():

3263

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

3264

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

3265

.decode("utf-8"))

3312

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

3313

if isinstance(value[attribute], bytes):

3314

value[attribute] = (value[attribute]

3315

.decode("utf-8"))

3266

3316

os.remove(stored_state_path)

3267

3317

except IOError as e:

3268

3318

if e.errno == errno.ENOENT:

3269

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

3270

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

3319

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

3320

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

3271

3321

else:

3272

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

3273

exc_info=e)

3322

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

3323

exc_info=e)

3274

3324

raise

3275

3325

except EOFError as e:

3276

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

3277

"EOFError:",

3278

exc_info=e)

3326

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

3327

exc_info=e)

3279

3328

3280

3329

with PGPEngine() as pgp:

3281

3330

for client_name, client in clients_data.items():

3308

3357

if client["enabled"]:

3309

3358

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

3310

3359

if not client["last_checked_ok"]:

3311

logger.warning(

3312

"disabling client {} - Client never "

3313

"performed a successful checker".format(

3314

client_name))

3360

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

3361

" never performed a successful"

3362

" checker", client_name)

3315

3363

client["enabled"] = False

3316

3364

elif client["last_checker_status"] != 0:

3317

logger.warning(

3318

"disabling client {} - Client last"

3319

" checker failed with error code"

3320

" {}".format(

3321

client_name,

3322

client["last_checker_status"]))

3365

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

3366

" last checker failed with error"

3367

" code %s", client_name,

3368

client["last_checker_status"])

3323

3369

client["enabled"] = False

3324

3370

else:

3325

3371

client["expires"] = (

3326

3372

datetime.datetime.utcnow()

3327

3373

+ client["timeout"])

3328

logger.debug("Last checker succeeded,"

3329

" keeping {} enabled".format(

3330

client_name))

3374

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

3375

" enabled", client_name)

3331

3376

try:

3332

3377

client["secret"] = pgp.decrypt(

3333

3378

client["encrypted_secret"],

3334

3379

client_settings[client_name]["secret"])

3335

3380

except PGPError:

3336

3381

# If decryption fails, we use secret from new settings

3337

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

3338

client_name))

3382

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

3383

client_name)

3339

3384

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

3340

3385

["secret"])

3341

3386

3355

3400

server_settings=server_settings)

3356

3401

3357

3402

if not tcp_server.clients:

3358

logger.warning("No clients defined")

3403

log.warning("No clients defined")

3359

3404

3360

3405

if not foreground:

3361

3406

if pidfile is not None:

3364

3409

with pidfile:

3365

3410

print(pid, file=pidfile)

3366

3411

except IOError:

3367

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

3368

pidfilename, pid)

3412

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

3413

pidfilename, pid)

3369

3414

del pidfile

3370

3415

del pidfilename

3371

3416

3521

3566

3522

3567

try:

3523

3568

with tempfile.NamedTemporaryFile(

3524

mode='wb',

3569

mode="wb",

3525

3570

suffix=".pickle",

3526

prefix='clients-',

3571

prefix="clients-",

3527

3572

dir=os.path.dirname(stored_state_path),

3528

3573

delete=False) as stored_state:

3529

3574

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

3537

3582

except NameError:

3538

3583

pass

3539

3584

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

3540

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

3541

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

3585

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

3586

os.strerror(e.errno))

3542

3587

else:

3543

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

3544

exc_info=e)

3588

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

3589

exc_info=e)

3545

3590

raise

3546

3591

3547

3592

# Delete all clients, and settings from config

3573

3618

if zeroconf:

3574

3619

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

3575

3620

if use_ipv6:

3576

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

3577

" flowinfo %d, scope_id %d",

3578

*tcp_server.socket.getsockname())

3621

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

3622

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

3579

3623

else: # IPv4

3580

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

3581

*tcp_server.socket.getsockname())

3624

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

3625

*tcp_server.socket.getsockname())

3582

3626

3583

3627

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

3584

3628

3588

3632

try:

3589

3633

service.activate()

3590

3634

except dbus.exceptions.DBusException as error:

3591

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

3635

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

3592

3636

cleanup()

3593

3637

sys.exit(1)

3594

3638

# End of Avahi example code

3595

3639

3596

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

3597

lambda *args, **kwargs:

3598

(tcp_server.handle_request

3599

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

3640

GLib.io_add_watch(

3641

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

3642

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

3643

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

3644

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

3600

3645

3601

logger.debug("Starting main loop")

3646

log.debug("Starting main loop")

3602

3647

main_loop.run()

3603

3648

except AvahiError as error:

3604

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

3649

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

3605

3650

cleanup()

3606

3651

sys.exit(1)

3607

3652

except KeyboardInterrupt:

3608

3653

if debug:

3609

3654

print("", file=sys.stderr)

3610

logger.debug("Server received KeyboardInterrupt")

3611

logger.debug("Server exiting")

3655

log.debug("Server received KeyboardInterrupt")

3656

log.debug("Server exiting")

3612

3657

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

3613

3658

cleanup()

3614

3659

3615

3616

if __name__ == '__main__':

3617

main()

3660

3661

def parse_test_args():

3662

# type: () -> argparse.Namespace

3663

parser = argparse.ArgumentParser(add_help=False)

3664

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

3665

parser.add_argument("--prefix", )

3666

args, unknown_args = parser.parse_known_args()

3667

if args.check:

3668

# Remove test options from sys.argv

3669

sys.argv[1:] = unknown_args

3670

return args

3671

3672

# Add all tests from doctest strings

3673

def load_tests(loader, tests, none):

3674

import doctest

3675

tests.addTests(doctest.DocTestSuite())

3676

return tests

3677

3678

if __name__ == "__main__":

3679

options = parse_test_args()

3680

try:

3681

if options.check:

3682

extra_test_prefix = options.prefix

3683

if extra_test_prefix is not None:

3684

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

3685

.result.wasSuccessful()):

3686

sys.exit(1)

3687

class ExtraTestLoader(unittest.TestLoader):

3688

testMethodPrefix = extra_test_prefix

3689

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

3690

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

3691

else:

3692

unittest.main(argv=[""])

3693

else:

3694

main()

3695

finally:

3696

logging.shutdown()

3697

3698

# Local Variables:

3699

# run-tests:

3700

# (lambda (&optional extra)

3701

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

3702

# extra))

3703

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

3704

# (funcall remove-test-window)

3705

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

3706

# run-tests-in-test-buffer:

3707

# (lambda (dir &optional extra)

3708

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

3709

# (setq buffer-read-only nil

3710

# default-directory dir)

3711

# (erase-buffer)

3712

# (compilation-mode))

3713

# (let ((process-result

3714

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

3715

# (process-file-shell-command

3716

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

3717

# (and (numberp process-result)

3718

# (= process-result 0))))

3719

# get-command-line:

3720

# (lambda (&optional extra)

3721

# (let ((quoted-script

3722

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

3723

# (format

3724

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

3725

# quoted-script)))

3726

# get-script-name:

3727

# (lambda ()

3728

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

3729

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

3730

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

3731

# (buffer-file-name))))

3732

# remove-test-window:

3733

# (lambda ()

3734

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

3735

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

3736

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

3737

# (lambda ()

3738

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

3739

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

3740

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

3741

# (display-buffer-overriding-action

3742

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

3743

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

3744

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

3745

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

3746

# eval:

3747

# (progn

3748

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

3749

# (funcall run-tests t)))

3750

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

3751

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

3752

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

3753

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

3754

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

3755

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

3756

# End: