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package goldilocks
import (
"crypto/rand"
"testing"
"github.com/cloudflare/circl/internal/test"
)
func randomPoint() *Point {
var k Scalar
_, _ = rand.Read(k[:])
return Curve{}.ScalarBaseMult(&k)
}
func TestIsogeny(t *testing.T) {
const testTimes = 1 << 10
var gold Curve
var twist twistCurve
for i := 0; i < testTimes; i++ {
P := randomPoint()
Q := gold.pull(gold.push(P)) // phi^-(phi^+(P))
got := Q
want := gold.Double(gold.Double(P)) // 4P
if !got.IsEqual(want) {
test.ReportError(t, got, want, P)
}
got = twist.push(twist.pull(Q)) // phi^-(phi^+(Q))
want = gold.Double(gold.Double(Q)) // 4Q
if !got.IsEqual(want) {
test.ReportError(t, got, want, P)
}
}
}
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