加密填充无效，无法删除

本文关键字：删除 填充 无效 加密 | 更新日期: 2023-09-27 17:52:12

我正在尝试解密windows phone 8中的字符串。但不幸的是，它给了我以下错误

System.Security.Cryptography。CryptographicException:填充无效，不能删除。在System.Security.Cryptography.RijndaelManagedTransform。DecryptData(Byte[] inputBuffer, Int32 inputOffset, Int32 inputCount, Byte[]&outputBuffer, Int32 outputOffset, PaddingMode, PaddingMode, Boolean fLast)在System.Security.Cryptography.RijndaelManagedTransform。TransformFinalBlock(Byte[] inputBuffer, Int32 inputOffset, Int32 inputCount)在System.Security.Cryptography.CryptoStream.FlushFinalBlock ()在SampleAESEncryption.AES256。解密(String dataToDecrypt, String password, String salt)在SampleAESEncryption.MainPage。btnDecrypt_Click(对象发送方，RoutedEventArgs)在System.Windows.Controls.Primitives.ButtonBase.OnClick ()在System.Windows.Controls.Button.OnClick ()在System.Windows.Controls.Primitives.ButtonBase。OnMouseLeftButtonUp (MouseButtonEventArgs e)在System.Windows.Controls.Control。OnMouseLeftButtonUp(Control ctrl, EventArgs)在MS.Internal.JoltHelper。FireEvent(IntPtr unmanagedObj, IntPtr unmanagedobjgs, Int32 argsTypeIndex, Int32 actualArgsTypeIndex, String eventName)

这是我的代码。 txtText。文本是256位加密的。 
 txtText.Text = "Y5tq+5Smr13ChO2KYTOxvbCBlRTIDFXf+Ott2Euq+HiXTHDtUXn2+E46CYCGSC7P";
 private void btnDecrypt_Click(object sender, RoutedEventArgs e)
 {
        AES256 encryptor = new AES256();
        string strBase64 = Convert.ToBase64String(Encoding.UTF8.GetBytes(txtText.Text.Trim()));
        string decryptedString = encryptor.Decrypt(strBase64, "12345678", "12345678");
        txtText.Text = decryptedString;
 }
<<p> 解密方法/strong> 
 public string Decrypt(string dataToDecrypt, string password, string salt)
    {
        AesManaged aes = null;
        MemoryStream memoryStream = null;
        try
        {
            //Generate a Key based on a Password and HMACSHA1 pseudo-random number generator
            //Salt must be at least 8 bytes long
            //Use an iteration count of at least 1000
            Rfc2898DeriveBytes rfc2898 = new Rfc2898DeriveBytes(password, Encoding.UTF8.GetBytes(salt), 10000);
            //Create AES algorithm
            aes = new AesManaged();
            //Key derived from byte array with 32 pseudo-random key bytes
            aes.Key = rfc2898.GetBytes(32);
            //IV derived from byte array with 16 pseudo-random key bytes
            aes.IV = rfc2898.GetBytes(16);
            //Create Memory and Crypto Streams
            memoryStream = new MemoryStream();
            CryptoStream 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();
            //Dispose
            if (cryptoStream != null)
                cryptoStream.Dispose();
            //Retval
            return Encoding.UTF8.GetString(decryptBytes, 0, decryptBytes.Length);
        }
        finally
        {
            if (memoryStream != null)
                memoryStream.Dispose();
            if (aes != null)
                aes.Clear();
        }
    }

我试了很多，但不能解决这个问题。我怎么解决这个问题?我的解密方法有什么问题吗?

加密填充无效，无法删除

Convert.ToBase64String(Encoding.UTF8.GetBytes(txtText.Text.Trim()));

这几乎肯定是一个错误。您应该使用Convert.FromBase64从数据中获取字节数组，对其进行解密，然后使用Encoding.UTF8.GetString将结果转换为字符串。当加密时，用另一种方式:用Encoding.UTF8.GetBytes获得字节，加密它们，然后用Convert.ToBase64String将结果转换为字符串。

相关文章：