secrets_encrypt.php

<?php
/**
 * Encrypts a "secrets.json" file using mcrypt
 *
 * Usage: php secrets_encrypt.php > secrets.ejson
*/

require(dirname(__FILE__) . '/key.php');

function _secrets_encrypt($string) {
  return base64_encode(mcrypt_encrypt(MCRYPT_RIJNDAEL_256, md5(SECRET_KEY), $string, MCRYPT_MODE_CBC, md5(md5(SECRET_KEY))));
}

$plain_json = file_get_contents(dirname(__FILE__) . '/secrets.json');

if ($plain_json !== FALSE) {
  echo _secrets_encrypt($plain_json);
}