/// <summary>
/// Writes a sequence of bytes to the current stream and advances the current position within this stream by the number of bytes written.
/// </summary>
/// <param name="buffer">An array of bytes. This method copies count bytes from buffer to the current stream. </param>
/// <param name="offset">The byte offset in buffer at which to begin copying bytes to the current stream. </param>
/// <param name="count">The number of bytes to be written to the current stream. </param>
public override void Write(byte[] buffer, int offset, int count)
{
long base_offset = offset + _stream.Position;
HfsXorCipher.XorBlockWithKey(buffer, _key, (int)base_offset);
_stream.Write(buffer, offset, count);
}
/// <summary>
/// Reads a sequence of bytes from the current CryptoStream into buffer,
/// and advances the position within the stream by the number of bytes read.
/// </summary>
public override int Read(byte[] outBuffer, int offset, int count)
{
long base_offset = _base + offset + _stream.Position;
_stream.Read(outBuffer, offset, count);
HfsXorCipher.XorBlockWithKey(outBuffer, _key, (int)base_offset);
return(count);
}
