EVP_PKEY_get0_RSA
rsa = EVP_PKEY_get0_RSA(priv);
RSA *EVP_PKEY_get0_RSA(EVP_PKEY *pkey);
if ((rsa = EVP_PKEY_get0_RSA(pkey)) != NULL) {
if ((rsa = EVP_PKEY_get0_RSA(pkey)) != NULL) {
if ((rsa = EVP_PKEY_get0_RSA(pkey)) != NULL) {
if (EVP_PKEY_get0_RSA(pkey) != NULL)