Golang Scalar.Sub示例

示例#1

文件： simple.go 项目： LegoShrimp/crypto

// Simple helper to compute G^{ab-cd} for Theta vector computation.
func thenc(grp abstract.Group, G abstract.Point,
	a, b, c, d abstract.Scalar) abstract.Point {

	var ab, cd abstract.Scalar
	if a != nil {
		ab = grp.Scalar().Mul(a, b)
	} else {
		ab = grp.Scalar().Zero()
	}
	if c != nil {
		if d != nil {
			cd = grp.Scalar().Mul(c, d)
		} else {
			cd = c
		}
	} else {
		cd = grp.Scalar().Zero()
	}
	return grp.Point().Mul(G, ab.Sub(ab, cd))
}