k6.go

package main

import (
	"crypto/elliptic"
	"crypto/rand"
	"fmt"
	"log"
	"math/big"

	"github.com/cloudflare/circl/ecc/p384"
)

var ref = elliptic.P384()

func RandPoint() (x, y *big.Int) {
	k, err := rand.Int(rand.Reader, ref.Params().N)
	if err != nil {
		log.Fatal(err)
	}
	return ref.ScalarBaseMult(k.Bytes())
}

func main() {
	c := p384.P384()

	x1, y1 := RandPoint()
	k := []byte{6}

	gx, gy := c.ScalarMult(x1, y1, k)
	ex, ey := ref.ScalarMult(x1, y1, k)
	fmt.Printf("got    x=%x y=%x\n", gx, gy)
	fmt.Printf("expect x=%x y=%x\n", ex, ey)
}