/// <summary>
/// Curve25519 uses a so-called differential-addition chain proposed by Montgomery to multiply a point,
/// identified only by its x-coordinate, by a scalar
/// </summary>
/// <param name="n"></param>
/// <param name="p"></param>
/// <param name="qSize"></param>
/// <returns></returns>
internal static byte[] ScalarMultiplication(byte[] n, byte[] p, int qSize)
{
var q = new byte[qSize];
var p0 = FieldElementOperations.FromBytes(p);
var q0 = CalculateLadderStep(n, ref p0);
FieldElementOperations.ToBytes(q, ref q0);
return(q);
}
