php - 加密mysql数据并通过超链接，然后在下一页解密？

Question

我正在使用以下加密方法来加密我的 MySQL 数据/字符串，如下所示:

$string = $row['reference'];
       $secret_key = "PlowFish";
// Create the initialization vector for added security.
$iv = mcrypt_create_iv(mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB), MCRYPT_RAND);
// Encrypt $string
$encrypted_string = mcrypt_encrypt(MCRYPT_RIJNDAEL_256, $secret_key, $string, MCRYPT_MODE_CBC, $iv);

然后我通过超链接传递加密的字符串，如下所示:

<a href="ns_application.php?ns_request='.$encrypted_string.'"><p>Click'</p></a>

然后我尝试解密字符串并将原始值回显到下一页，如下所示:

$enc = $_GET['ns_request'];
$secret_key = "PlowFish";
// Create the initialization vector for added security.
$iv = mcrypt_create_iv(mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB), MCRYPT_RAND);
$decrypted_string = mcrypt_decrypt(MCRYPT_RIJNDAEL_256, $secret_key, $enc, MCRYPT_MODE_CBC, $iv);

Your reference is: <?php echo $decrypted_string; ?>

但是这不起作用，因为它仍然回显加密值而不是解密值。请有人告诉我我要去哪里错了。谢谢

Answer 1

老实说，我没有测试上面的加密/解密，现在我可以看到它仍然是垃圾。如果需要，可以使用这里的小类。

class encryption{
    private $config;

    public function __construct( $options=array() ){
        $this->config=array_merge(
            array(
                'cipher'    =>  MCRYPT_RIJNDAEL_256,
                'mode'      =>  MCRYPT_MODE_ECB,
                'key'       =>  FALSE,
                'iv'        =>  FALSE,
                'size'      =>  FALSE,
                'base64'    =>  TRUE,
                'salt'      =>  FALSE
            ),
            $options
        );
    }
    private function getivs( $config=object ){
        $config->size=mcrypt_get_iv_size( $config->cipher, $config->mode );
        $config->iv=mcrypt_create_iv( $config->size, MCRYPT_RAND );
    }
    public function encrypt( $data=NULL ){
        $config=(object)$this->config;
        $this->getivs( $config );
        $data=trim( $data );
        $module = mcrypt_module_open( $config->cipher, '', $config->mode, '' );
        mcrypt_generic_init( $module, $config->key, $config->iv );

        $output = $config->base64 ? base64_encode( mcrypt_generic( $module, $data ) ) : mcrypt_generic( $module, $data );

        mcrypt_generic_deinit( $module );
        mcrypt_module_close( $module );
        return $output;
    }
    public function decrypt( $data=NULL ){
        $config=(object)$this->config;
        $this->getivs( $config );
        mb_detect_order( 'auto' );
        $encoding=mb_detect_encoding( $data );
        if( !$data or is_null( $data ) or empty( $data ) or !$encoding or $data=='' or base64_decode( $data )=='' ) return FALSE;

        $module = mcrypt_module_open( $config->cipher, '', $config->mode, '' );
        mcrypt_generic_init( $module, $config->key, $config->iv );

        $output = $config->base64 ? rtrim( mdecrypt_generic( $module, base64_decode( $data ) ),"\0" ) : rtrim( mdecrypt_generic( $module, $data ),"\0" );

        mcrypt_generic_deinit( $module );
        mcrypt_module_close( $module );
        return urldecode( $output );
    }
}//end class

像这样使用它:-

$enc=new encryption( array( 'key'=>'PlowFish' ) );
$encrypted_string = $enc->encrypt( $string );
echo $encrypted_string.BR;
$decrypted_string=$enc->decrypt( $encrypted_string );
echo $decrypted_string.BR;