RijndaelManaged - 填充无效

问题描述

我使用RijndaelManaged加密仅4字节的数据，产生16字节的结果（我使用128块大小）。当我尝试解密这16个字节时，我收到消息填充无效且无法删除。。



（CryptoStream的基本流是基于这16个字节的MemoryStream）。



有谁知道为什么？



谢谢

I am using RijndaelManaged to encrypt just 4 bytes of data which produces a 16 byte result (i am using a 128 block size). When I try to decrypt these 16 bytes I get the message "Padding is invalid and cannot be removed.".

(The base stream of the CryptoStream is a MemoryStream based on just these 16 bytes).

Anyone know why?

Thanks

推荐答案

public RijndaelManaged GetRijndaelManaged(String secretKey)
{
var keyBytes = new byte[16];
var secretKeyBytes = Encoding.UTF8.GetBytes(secretKey);
Array.Copy(secretKeyBytes, keyBytes, Math.Min(keyBytes.Length, secretKeyBytes.Length));
return new RijndaelManaged
{
Mode = CipherMode.CBC,
Padding = PaddingMode.PKCS7,
KeySize = 128,
BlockSize = 128,
Key = keyBytes,
IV = keyBytes
};
}

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