用CryptoStream加密/解密

Question

我正在尝试使用CryptoStream (Aes)加密和解密流。以下是我使用的方法：

public void Encrypt(Stream input, Stream output)
    {
        Aes aes = Aes.Create();

        aes.Key = Key;
        aes.IV = IV;
        aes.Padding = PaddingMode.PKCS7;
        //aes.Mode = CipherMode.CBC;
        //aes.BlockSize = 128;

        ICryptoTransform aesEncryptor = aes.CreateEncryptor();

        using (CryptoStream cryptoStream = new(output, aesEncryptor, CryptoStreamMode.Write))
        {
            input.CopyTo(cryptoStream);
            //cryptoStream.FlushFinalBlock();
            cryptoStream.Flush();
            cryptoStream.Close();
        }
    }

结束

public void Decrypt(Stream input, Stream output)
    {
        Aes aes = Aes.Create();

        aes.Key = Key;
        aes.IV = IV;
        aes.Padding = PaddingMode.PKCS7;
        //aes.Mode = CipherMode.CBC;
        //aes.BlockSize = 128;

        ICryptoTransform aesDecryptor = aes.CreateDecryptor();

        using (CryptoStream cryptoStream = new(input, aesDecryptor, CryptoStreamMode.Read))
        {
            cryptoStream.CopyTo(output);
            cryptoStream.Flush();
            cryptoStream.Close();            }
    }

我在做的是：

• I生成一个随机文本文件。它有几行代码，最后一行是"abcdefghijklmnopqrstuvwxyz_ABCDEFGHIJKLMOPQRSTUVWXYZ_1234567890_0987654321"
• I使用加密方法加密文件，在输入和输出中传递FileStream，
• i用解密方法解密结果，在输入和输出中传递FileStream。

我得到的是最后一行不相等的文件(使用旧的但使用黄金的"abcdefghijklmnopqrstuvwxyz_ABCDEFGHIJKLMOPQRSTUVWXYZ_1234567890_0987654321“)：正如我所写的，原始文件有"abcdefghijklmnopqrstuvwxyz_ABCDEFGHIJKLMOPQRSTUVWXYZ_1234567890_0987”行，而结果文件有“abcdefghijklmnopqrstuvwxyz_ABCDEFGHIJKLMOPQRSTUVWXYZ_1234567890_0987”(注意，缺少了6个最终字符)。

知道怎么解决这个问题吗？

Answer 1

感谢马蒂亚斯·R·贾森的建议。按照工作守则：

public void Encrypt(Stream input, Stream output)
    {
        Aes aes = Aes.Create();

        aes.Key = Key;
        aes.IV = IV;
        aes.Padding = PaddingMode.PKCS7;
        //aes.Mode = CipherMode.CBC;
        //aes.BlockSize = 128;

        ICryptoTransform aesEncryptor = aes.CreateEncryptor();

        using (CryptoStream cryptoStream = new(output, aesEncryptor, CryptoStreamMode.Write))
        {
            input.CopyTo(cryptoStream);
            cryptoStream.FlushFinalBlock();
        }
    }

和

public void Decrypt(Stream input, Stream output)
    {
        Aes aes = Aes.Create();

        aes.Key = Key;
        aes.IV = IV;
        aes.Padding = PaddingMode.PKCS7;
        //aes.Mode = CipherMode.CBC;
        //aes.BlockSize = 128;

        ICryptoTransform aesDecryptor = aes.CreateDecryptor();

        using (CryptoStream cryptoStream = new(input, aesDecryptor, CryptoStreamMode.Read))
        {
            cryptoStream.CopyTo(output);
            cryptoStream.Close();
        }
        output.Flush();
    }

请注意

output.Flush()

命令！