EVP_PKEY_meth_get0
const EVP_PKEY_METHOD *pmeth = EVP_PKEY_meth_get0(i);
OSSL_DEPRECATEDIN_3_0 const EVP_PKEY_METHOD *EVP_PKEY_meth_get0(size_t idx);
pmeth = EVP_PKEY_meth_get0(i);
pmeth = EVP_PKEY_meth_get0(i);