public function keyTypeToIDE($val)
{
return my_base_convert($val, 36, 62);
}
/**
* decrypt an encrypted message or value
* <br><br>Example:
* <code>
* <?php
* $person_id = 12345;
* $person_ide = encrypt($person_id,'person');
* // $person_ide: iYq8okuGw9a
* $temp = decrypt($person_ide,'person');
* // $temp: 12345
* ?>
* </code>
* @version 2.1
* @param string $encrypted_message the encrypted message or value
* @param string $key the private key, typically the name of the variable is used as the private key
* @return string returns a decrypted message or false when unsuccessful
* @see encrypt()
*/
function decrypt($encrypted_message, $key = 31337)
{
global $sky_encryption_key;
if (!$key) {
$key = 31337;
}
//$key .= $sky_encryption_key;
$temp = $key . $sky_encryption_key;
if (strlen($temp) > 16) {
$key = substr(strrev($key), 0, 16 - strlen($sky_encryption_key)) . $sky_encryption_key;
} else {
$key = $temp;
}
$encrypted_message = my_base_convert($encrypted_message, 62, 16);
$encrypted_message = substr($encrypted_message, 1);
$iv_size = mcrypt_get_iv_size(MCRYPT_XTEA, MCRYPT_MODE_ECB);
$iv = mcrypt_create_iv($iv_size, MCRYPT_RAND);
$temp = trim(mcrypt_decrypt(MCRYPT_XTEA, $key, pack("H*", $encrypted_message), MCRYPT_MODE_ECB, $iv));
if (ctype_alnum($temp)) {
return $temp;
} else {
return false;
}
}
