EC_KEY_set_method
if (EC_KEY_set_method(ecdsa, helper->ec_meth) != 1)
if (EC_KEY_set_method(ec_cert, helper->ec_meth) != 1)
if (EC_KEY_set_method(ec, ec_key_method) != 1)
OSSL_DEPRECATEDIN_3_0 int EC_KEY_set_method(EC_KEY *key, const EC_KEY_METHOD *meth);