<?php

# Copyright (c) 2009-2015 Yubico AB
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
#   * Redistributions of source code must retain the above copyright
#     notice, this list of conditions and the following disclaimer.
#
#   * Redistributions in binary form must reproduce the above
#     copyright notice, this list of conditions and the following
#     disclaimer in the documentation and/or other materials provided
#     with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

require_once 'ykval-common.php';
require_once 'ykval-config.php';
require_once 'ykval-db.php';
require_once 'ykval-log.php';

header("content-type: text/plain");

$myLog = new Log('ykval-revoke');
$myLog->addField('ip', $_SERVER['REMOTE_ADDR']);

if (!in_array ($_SERVER["REMOTE_ADDR"], $baseParams['__YKREV_IPS__'])) {
  logdie($myLog, "ERROR Authorization failed (logged ". $_SERVER["REMOTE_ADDR"] .")");
}

# Parse input
$yk = $_REQUEST["yk"];
$do = $_REQUEST["do"];
if (!$yk || !$do) {
  logdie($myLog, "ERROR Missing parameter");
}
if (!preg_match("/^([cbdefghijklnrtuv]{0,16})$/", $yk)) {
  logdie($myLog, "ERROR Unknown yk value: $yk");
}
if ($do != "enable" && $do != "disable") {
  logdie($myLog, "ERROR Unknown do value: $do");
}

# Connect to db
$db = Db::GetDatabaseHandle($baseParams, 'ykval-revoke');
if (!$db->connect()) {
  logdie($myLog, "ERROR Database connect error");
}

# Check if key exists
$r = $db->findBy('yubikeys', 'yk_publicname', $yk, 1);
if (!$r) {
  logdie($myLog, "ERROR Unknown yubikey: $yk");
}

# Enable/Disable the yubikey
if (!$db->updateBy('yubikeys', 'yk_publicname', $yk,
		   array('active'=>($do == "enable" ? "1" : "0")))) {
  logdie($myLog, "ERROR Could not $do for $yk");
}

# We are done
logdie($myLog, "OK Processed $yk with $do");