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<?php
/**
* @package: Sobi Framework
*
* @author
* Name: Sigrid Suski & Radek Suski, Sigsiu.NET GmbH
* Email: sobi[at]sigsiu.net
* Url: https://www.Sigsiu.NET
*
* @copyright Copyright (C) 2006 - 2021 Sigsiu.NET GmbH (https://www.sigsiu.net). All rights reserved.
* @license GNU/LGPL Version 3
* This program is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License version 3
* as published by the Free Software Foundation, and under the additional terms according section 7 of GPL v3.
* See https://www.gnu.org/licenses/lgpl.html and https://www.sigsiu.net/licenses.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
*
* @created Mon, Jun 18, 2018 by Radek Suski
*/
//declare( strict_types=1 );
namespace Sobi\Utils;
/**
* Class Encryption
* @package Sobi\Utils
*/
class Encryption
{
/**
* @param string $data
* @param string $key
*
* @return string
*/
public static function Encrypt( string $data, string $key ): string
{
$cipher = 'aes-128-gcm';
if ( !( in_array( $cipher, openssl_get_cipher_methods() ) ) ) {
$cipher = 'AES-128-CBC';
}
$ivLength = openssl_cipher_iv_length( $cipher );
$iv = openssl_random_pseudo_bytes( $ivLength );
$data = openssl_encrypt( $data, $cipher, $key, 0, $iv, $tag );
$r = [ 'data' => base64_encode( $data ), 'cipher' => $cipher, 'iv' => base64_encode( $iv ), 'tag' => base64_encode( $tag ) ];
return base64_encode( json_encode( $r ) );
}
/**
* @param string $input
* @param string $key
*
* @return false|string
*/
public static function Decrypt( string $input, string $key )
{
$data = json_decode( base64_decode( $input ), true );
if ( is_array( $data ) && isset( $data[ 'cipher' ] ) ) {
return openssl_decrypt( base64_decode( $data[ 'data' ] ), $data[ 'cipher' ], $key, 0, base64_decode( $data[ 'iv' ] ), base64_decode( $data[ 'tag' ] ) );
}
else {
return $input;
}
}
}