升级 PHP7.1 后 openssl 解密 mcrypt AES 数据不兼容问题的处理方法

旧版代码



        $aesKey=base64_decode('pEJ0hDyJ8NUJBZijzR0T8DjP+W/fCaKwsB9tXbnSQSA=');
        $aesIV= base64_decode('BuqTZn/rPWQ3eo/b5EP2xw==');
        $str = 'abc123';
        $CIPHER = 'rijndael-128';
        $mode = 'cbc';
    print  base64_encode(mcrypt_encrypt($CIPHER, $aesKey, $str, $mode, $aesIV));

输出结果：9RWAFwihFNQMa/wp24x0vw==

php7+ 新版代码


        $aesKey=base64_decode('pEJ0hDyJ8NUJBZijzR0T8DjP+W/fCaKwsB9tXbnSQSA=');
        $aesIV= base64_decode('BuqTZn/rPWQ3eo/b5EP2xw==');
        $str = 'abc123';
        $__aesEncode = function($data, $privateKey, $iv=''){

             if (strlen($data) % 16) {
                $data = str_pad($data,strlen($data) + 16 - strlen($data) % 16, "\0");
            }
             $encrypted=  openssl_encrypt($data, 'AES-256-CBC',$privateKey,OPENSSL_RAW_DATA|OPENSSL_ZERO_PADDING,$iv);
            return  base64_encode(($encrypted)); 
        };

        $str1 = $__aesEncode($str, $aesKey, $aesIV);
print_r($str1);

 //新版解密：

  public function decode( $key,$iv, $str ){

        $str =  openssl_decrypt($str, 'AES-256-CBC', $key, OPENSSL_ZERO_PADDING, $iv);
        $str = rtrim($str, "\0");
        return $str;
    }

输出结果：9RWAFwihFNQMa/wp24x0vw==