for l := 0; l < 600; l++ {
		h := bytes.Repeat([]byte{0xff}, l)
		hashToNat(c, bigmod.NewNat(), h)
	}
}

func TestZeroSignature(t *testing.T) {
	testAllCurves(t, testZeroSignature)
}

func testZeroSignature(t *testing.T, curve elliptic.Curve) {
	privKey, err := GenerateKey(curve, rand.Reader)
	if err != nil {
		panic(err)
	}