public void EncryptFile(string input, string output,RijndaelManaged alg1)
{
FileStream inputStream = new FileStream(input, FileMode.Open, FileAccess.Read);
FileStream outputStream = new FileStream(output, FileMode.OpenOrCreate, FileAccess.Write);
SymmetricAlgorithm alg = new RijndaelManaged();
alg.Key = alg1.Key;
alg.IV = alg1.IV;
byte[] data = new byte[inputStream.Length];
inputStream.Read(data, 0, (int)data.Length);
alg.Padding = PaddingMode.PKCS7;
ICryptoTransform encryptor = alg.CreateEncryptor();
CryptoStream stream = new CryptoStream(outputStream, encryptor, CryptoStreamMode.Write);
// WRITE THE DATA ENCRYPTING
stream.Write(data, 0, data.Length);
// CLOSE SEGMENT
stream.Close();
inputStream.Close();
outputStream.Close();
}This is the algorithm which i use for encrypting file, but if try encrypting a huge video file of size 700 mb , it gives out of memory exception.
so can u please tell me how to read just around 25 mb and encrypt that and next read the next 25mb and encrypt it into same file
