Source file src/github.com/cloudflare/circl/ecc/goldilocks/isogeny_test.go

Documentation: github.com/cloudflare/circl/ecc/goldilocks

     1  package goldilocks
     2  
     3  import (
     4  	"crypto/rand"
     5  	"testing"
     6  
     7  	"github.com/cloudflare/circl/internal/test"
     8  )
     9  
    10  func randomPoint() *Point {
    11  	var k Scalar
    12  	_, _ = rand.Read(k[:])
    13  	return Curve{}.ScalarBaseMult(&k)
    14  }
    15  
    16  func TestIsogeny(t *testing.T) {
    17  	const testTimes = 1 << 10
    18  	var gold Curve
    19  	var twist twistCurve
    20  
    21  	for i := 0; i < testTimes; i++ {
    22  		P := randomPoint()
    23  		Q := gold.pull(gold.push(P)) // phi^-(phi^+(P))
    24  		got := Q
    25  		want := gold.Double(gold.Double(P)) // 4P
    26  		if !got.IsEqual(want) {
    27  			test.ReportError(t, got, want, P)
    28  		}
    29  		got = twist.push(twist.pull(Q))    // phi^-(phi^+(Q))
    30  		want = gold.Double(gold.Double(Q)) // 4Q
    31  		if !got.IsEqual(want) {
    32  			test.ReportError(t, got, want, P)
    33  		}
    34  	}
    35  }
    36  

View as plain text