r.Neg(r)

	if Verify(&key.PublicKey, hash[:], r, r) {
		t.Errorf("bogus signature accepted")
	}
}

func TestZeroHashSignature(t *testing.T) {
	testAllCurves(t, testZeroHashSignature)
}

func testZeroHashSignature(t *testing.T, curve elliptic.Curve) {
	zeroHash := make([]byte, 64)

	privKey, err := GenerateKey(curve, rand.Reader)
	if err != nil {
		panic(err)
	}