C# 解密返回16字节而不是32字节，为什么？

我有下面的解密方法，似乎工作得很好，除了它只返回16个字节，而不是32个字节。我应该已经盯着它太久了，无法找出我做错了什么。我希望换一双眼睛会有帮助。谢谢

private string Decrypt(string dataToDecrypt, string password, string salt)
    {
        //Generate a Key based on a Password, Salt and HMACSHA1 pseudo-random number generator 
        Rfc2898DeriveBytes rfc2898 = new Rfc2898DeriveBytes(password, Encoding.UTF8.GetBytes(salt));

        //Create AES algorithm with 256 bit key and 128-bit block size 
        using (var aes = new AesManaged())
        {
            // These two values are hard coded in Silverlight
            //aes.Mode = CipherMode.CBC;
            //aes.Padding = PaddingMode.PKCS7;
            aes.Key = rfc2898.GetBytes(aes.KeySize / 8);
            aes.IV = rfc2898.GetBytes(aes.BlockSize / 8);

            //Create Memory and Crypto Streams 
            using (var memoryStream = new MemoryStream())
            {
                using (var cryptoStream = new CryptoStream(memoryStream, aes.CreateDecryptor(), CryptoStreamMode.Write))
                {

                    //Decrypt Data 
                    byte[] data = Convert.FromBase64String(dataToDecrypt);
                    cryptoStream.Write(data, 0, data.Length);
                    // cryptoStream.FlushFinalBlock();

                    //Return Decrypted String 
                    byte[] decryptBytes = memoryStream.ToArray();
                    string decrypted = Encoding.UTF8.GetString(decryptBytes, 0, decryptBytes.Length);
                    return decrypted;

                }       // using (cryptoStream = new CryptoStream(memoryStream, aes.CreateDecryptor(), CryptoStreamMode.Write))

            }       // using (memoryStream = new MemoryStream())

        }       // using (aes = new AesManaged())

    }       // string Decrypt(string dataToDecrypt, string password, string salt)

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您的块大小是128位。如果您只解码一个块，将得到16个字节。

你好，Yann，谢谢您的输入。我不能将BlockSize设置得更大，因为它不允许这样做，所以它应该如何去解码多个块呢？@WillTartak:这完全取决于所使用的密码模式。欧洲央行？CBC？CTR？XTR？循环流化床？您试图实现的是更高级别（设计良好）的加密API所不提供的什么？