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);

然后我将加密的字符串传递给像这样的超链接：

<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; ?>

然而这不起作用，因为它仍然是加密值而不是解密值。请有人告诉我我哪里出错了。谢谢

Answer 1

您可能希望在发送网址之前对数据进行base64_encode，然后在尝试使用mcrypt进行解密之前使用base64_decode。加密文本包含不是url安全的字符，因此会被破坏。

$string = $row['reference'];
$secret_key = "PlowFish";
$iv = mcrypt_create_iv(mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB), MCRYPT_RAND);
$encrypted_string = base64_encode( mcrypt_encrypt(MCRYPT_RIJNDAEL_256, $secret_key, $string, MCRYPT_MODE_CBC, $iv) );


$enc = base64_decode( $_GET['ns_request'] );
$secret_key = "PlowFish";
$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; ?>

Answer 2

说实话，我没有测试上面的加密/解密，现在我已经看到它仍然是垃圾。如果你愿意，这里有一个小课程。

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;

加密mysql数据并通过超链接，然后在下一页解密？

2 个答案: