rsa_st
struct rsa_st *rsa; /* RSA */
typedef struct rsa_st RSA;
struct rsa_st;
int EVP_PKEY_set1_RSA(EVP_PKEY *pkey, struct rsa_st *key);
const struct rsa_st *EVP_PKEY_get0_RSA(const EVP_PKEY *pkey);
struct rsa_st *EVP_PKEY_get1_RSA(EVP_PKEY *pkey);
typedef struct rsa_st RSA;