C# CryptoStream 结果不符合预期

Question

我试图理解为什么如果 plainText 长度为 8 个字节，下面的代码会导致加密字节数组为 16 个字节。我预计结果的长度也是 8 个字节？

private static byte[] encrypt(byte[] key, byte[] plainText)
{
    try
    {
        using (MemoryStream ms = new MemoryStream())
        {
            DES des = new DESCryptoServiceProvider() { Key = key, IV = key };

            using (CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write))
            {
                using(BinaryWriter bw = new BinaryWriter(cs))
                {
                    bw.Write(plainText);
                }
            }

            return ms.ToArray();
        }
    }
    catch (Exception e)
    {
        Logger.LogWarning(e);
        throw e;
    }
}

Answer 1

已回答：8 字节纯文本的 DES 加密结果为 16 字节数组