wolfSSL_CTX_use_PrivateKey_[file | buffer](); // to load the private key
wolfSSL_CTX_use_certificate_[file | buffer](); // to load the certificate
wolfSSL_CTX_check_private_key(); // checks that the private key matches the public key in the cert, returns WOLFSSL_SUCCESS or WOLFSSL_FAILURE

/* Check private against public in certificate for match                         
*                                                                               
* ctx  WOLFSSL_CTX structure to check private key in                            
*                                                                               
* Returns SSL_SUCCESS on good private key and SSL_FAILURE if miss matched. */
int wolfSSL_CTX_check_private_key(const WOLFSSL_CTX* ctx);