ossl_x448
if (ossl_x448(secret, priv->privkey, peer->pubkey) == 0) {
&& ossl_x448(key, privkey, pubkey) == 0))
int ossl_x448(uint8_t out_shared_key[56], const uint8_t private_key[56],
if (!TEST_true(ossl_x448(out, in_scalar1, in_u1))
|| !TEST_true(ossl_x448(out, in_scalar2, in_u2))
if (!TEST_true(ossl_x448(out, k, u)))