Question

我正在将现有代码迁移到Python3，不幸的是解密显示IV必须为16个字节长的错误。

我尝试用sha1解密密钥，然后尝试解密。

我的php5.6代码是

HttpContext.Current.Server.UrlEncode(<Your URL>);

在我的python3文件中，就像

<?php

    define('ENCR_ALGO', MCRYPT_RIJNDAEL_256);
    define('ENCR_MODE', MCRYPT_MODE_CBC);
    define('KEY',"This is test key");



    function encryptData($plaintext){

        $iv=generateIv();
        $ciphertext = mcrypt_encrypt(ENCR_ALGO, getKey(), $plaintext, ENCR_MODE, $iv);
        $ciphertext.=$iv;
        return trim(base64_encode($ciphertext));
    }
    function decryptData($ciphertext){

        $iv=getIvFromCiphertext($ciphertext);
        $ciphertext=getActualCiphertext($ciphertext);
        $plaintext = mcrypt_decrypt(ENCR_ALGO, getKey(), $ciphertext, ENCR_MODE, $iv);
        return trim($plaintext);
    }

    function getIvFromCiphertext($encryptedData){
        $encryptedData  =   base64_decode($encryptedData);
        $cipherTextSize =   strlen($encryptedData);
        $ivStartIndex   =   $cipherTextSize-ivSize();
        return substr($encryptedData, $ivStartIndex , ivSize());
        }

    function getActualCiphertext($encryptedData){
        $encryptedData  =   base64_decode($encryptedData);
        $cipherTextSize =   strlen($encryptedData);

        return substr($encryptedData, 0,$cipherTextSize-ivSize());
        }

    function ivSize(){
        return mcrypt_get_iv_size(ENCR_ALGO, ENCR_MODE);
        }

    function keySize(){
        return mcrypt_get_key_size(ENCR_ALGO, ENCR_MODE);
        }

    function generateIv(){
        return mcrypt_create_iv(keySize(), MCRYPT_RAND );
    }

    function getKey(){
        return substr(sha1(KEY), 0, keySize());
    }

    echo "<br/>";
    echo encryptData("my pass");
    echo decryptData("vuv6kZgweA2YqSU4vMOuYStrbwZayDYaL7UQ+JajFCVc2p4HW1o68OmIm2l3Rbi/IaCWtKD5m6an7LqnvwRYVA==");
?>

错误显示ValueError：IV必须为16个字节长

我期望的结果是“我的通行证”

如何解决Rijindael解密（将PHP代码移植到python3）IV问题？

0 个答案: