Hi, everybody
I am working on AES encryption app. I need to split the file into blocks, then encrypt each block individually. What I had so far is below:
byte[] sourceBuffer = File.ReadAllBytes(inputFile);
byte[] destBuffer = new byte[sourceBuffer.Length];
byte[] toEncrypt = new byte[16];
// Encrypt each block.
for (int offset = 0; offset < sourceBuffer.Length; offset += 16)
{
Array.Copy(sourceBuffer, offset, toEncrypt, 0, 16); // copying from the source into 16 byte array size
Array.Copy(EncryptByte(toEncrypt), 0, destBuffer, offset, 16);
}
System.IO.File.WriteAllBytes(outputFile, destBuffer);
/********************************************************************************************************/
public static byte[] EncryptByte(byte[] input)
{
RijndaelManaged aes = new RijndaelManaged();
MemoryStream ms = new MemoryStream();
aes.IV = Iv;
aes.Key = Key;
aes.Padding = PaddingMode.Zeros;
CryptoStream cs = new CryptoStream(ms,aes.CreateEncryptor(), CryptoStreamMode.Write);
cs.Write(input, 0, input.Length);
cs.Close();
return ms.ToArray();
}
