// This test is slow (~6s) due to math utils using an inferior algorithm to calculate the result.
@Test
public void scalarMultiplyBasePointReturnsExpectedResult() {
for (int i = 0; i < 100; i++) {
// Arrange:
final GroupElement basePoint = ed25519.getB();
final FieldElement f = MathUtils.getRandomFieldElement();
// Act:
final GroupElement g = basePoint.scalarMultiply(f.toByteArray());
final GroupElement h = MathUtils.scalarMultiplyGroupElement(basePoint, f);
// Assert:
Assert.assertThat(g, IsEqual.equalTo(h));
}
}
// This test is slow (~6s) due to math utils using an inferior algorithm to calculate the result.
@Test
public void doubleScalarMultiplyVariableTimeReturnsExpectedResult() {
for (int i = 0; i < 50; i++) {
// Arrange:
final GroupElement basePoint = ed25519.getB();
final GroupElement g = MathUtils.getRandomGroupElement();
g.precompute(false);
final FieldElement f1 = MathUtils.getRandomFieldElement();
final FieldElement f2 = MathUtils.getRandomFieldElement();
// Act:
final GroupElement h1 =
basePoint.doubleScalarMultiplyVariableTime(g, f2.toByteArray(), f1.toByteArray());
final GroupElement h2 = MathUtils.doubleScalarMultiplyGroupElements(basePoint, f1, g, f2);
// Assert:
Assert.assertThat(h1, IsEqual.equalTo(h2));
}
}