c# - 文件解密从结尾处丢失 ~10 个字符

Question

我已经使用 RC2CryptoServiceProvider 编写了加密/解密方法在 C# 中，出于某种原因，我无法让我的解密器解密最后几个字节。该文件似乎刚刚被切断。我的加密方法如下:

    public static byte[] EncryptString(byte[] input, string password)
    {
        PasswordDeriveBytes pderiver = new PasswordDeriveBytes(password, null);
        byte[] ivZeros = new byte[8];
        byte[] pbeKey = pderiver.CryptDeriveKey("RC2", "MD5", 128, ivZeros);

        RC2CryptoServiceProvider RC2 = new RC2CryptoServiceProvider();

        byte[] IV = new byte[8];
        ICryptoTransform encryptor = RC2.CreateEncryptor(pbeKey, IV);

        MemoryStream msEncrypt = new MemoryStream();
        CryptoStream csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write);
        csEncrypt.Write(input, 0, input.Length);
        csEncrypt.FlushFinalBlock();

        return msEncrypt.ToArray();
    }

虽然我的解密看起来像:

    public static byte[] DecryptString(byte[] input, string password, int originalSize)
    {
        PasswordDeriveBytes pderiver = new PasswordDeriveBytes(password, null);
        byte[] ivZeros = new byte[8];
        byte[] pbeKey = pderiver.CryptDeriveKey("RC2", "MD5", 128, ivZeros);

        RC2CryptoServiceProvider RC2 = new RC2CryptoServiceProvider();

        byte[] IV = new byte[8];
        ICryptoTransform decryptor = RC2.CreateDecryptor(pbeKey, IV);

        MemoryStream msDecrypt = new MemoryStream();
        CryptoStream csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Write);

        csDecrypt.Write(input, 0, originalSize);
       // csDecrypt.FlushFinalBlock();

        char[] decrypted = new char[input.Length];
        decrypted = System.Text.Encoding.UTF8.GetChars(msDecrypt.ToArray());
        return msDecrypt.ToArray();

    }

char[] decrypted正在返回解密的整个文件，除了文件以 </LudoData> 结尾解密时，我只得到第一个 <特点。

我一直在研究事物的长度，但没有任何改变。在我的具体情况下，input长度为 11296，originalSize大小为 11290。但是，decrypted解密时最终大小为 11280。什么给!

Answer 1

是否有理由将 Flush() 注释掉？您是否尝试过完全关闭流？