Marshal converts a point on the curve into the uncompressed.

MarshalCompressed converts a point on the curve into the compressed form specified in SEC 1, Version 2.0, Section 2.3.3.

NewPoint returns a new Point representing the point at infinity.

P256OrdInverse, sets out to in⁻¹ mod org(G).

P256OrdMul multiplication modulo org(G).

Unmarshal converts a point, serialized by Marshal, into an x, y pair.

UnmarshalCompressed converts a point, serialized by MarshalCompressed, into an x, y pair.

This code operates in the Montgomery domain where R = 2²⁵⁶ mod n and n is the order of the scalar field.

P256Point is a P-256 point.