/// <summary>
/// Encrypt a file
/// </summary>
/// <param name="InputFile">The Current file to encrypt</param>
/// <param name="Key">The Encryption Key</param>
/// <param name="Salt">Makes the encryption more secure</param>
public static async Task <string> EncryptAsync(this IFormFile InputFile, string Key, string Salt)
{
// Locate a memory to write the bytes in.
using (MemoryStream MS = new MemoryStream())
{
// Advanced Encryption Standard Encryption Algorithm, it’s so powerful.
AesManaged aes = new AesManaged();
// Generate Encrypt Key, with a given key and pseudo byte array
using (PasswordDeriveBytes KeyGenerator = new PasswordDeriveBytes(Key, Encoding.UTF8.GetBytes(Salt)))
{
aes.Padding = PaddingMode.PKCS7;
aes.Key = KeyGenerator.GetBytes(aes.KeySize / 8);
aes.IV = KeyGenerator.GetBytes(aes.BlockSize / 8);
}
// Define a stream to link the data with Cryptographic transformation
using (CryptoStream cs = new CryptoStream(MS, aes.CreateEncryptor(), CryptoStreamMode.Write))
{
byte[] localBytes = await cs.GetBytesAsync();
await cs.WriteAsync(localBytes, 0, localBytes.Length);
}
// Write the encrypted data into the text
return(BitConverter.ToString(await MS.GetBytesAsync()));
}
}