/// <summary>
///
/// </summary>
public static void Transform(string path, string keyPath, int bufferLength = BufferLength)
{
if (string.IsNullOrEmpty(path))
{
throw new ArgumentNullException(nameof(path));
}
if (string.IsNullOrEmpty(keyPath))
{
throw new ArgumentNullException(nameof(keyPath));
}
if (!File.Exists(path))
{
throw new FileNotFoundException(path);
}
if (!File.Exists(keyPath))
{
throw new FileNotFoundException(keyPath);
}
if (new FileInfo(path).Length > new FileInfo(keyPath).Length)
{
throw new FileLengthGreaterThanKeyLengthException();
}
using (var keyStream = new FileStream(keyPath, FileMode.Open))
{
var readWriter = new SynchronizedReadWriter(path);
var keyBytes = new byte[bufferLength];
while (!readWriter.WriteComplete)
{
readWriter.Read(keyBytes.Length);
if (readWriter.GetBuffer().Length < keyBytes.Length)
{
keyBytes = new byte[readWriter.GetBuffer().Length];
}
keyStream.Read(keyBytes, 0, keyBytes.Length);
readWriter.SetBuffer(Xor(readWriter.GetBuffer(), keyBytes));
readWriter.Write();
}
}
}
