ssl_get_server_send_pkey
if ((cpk = ssl_get_server_send_pkey(s)) == NULL)
SSL_CERT_PKEY *ssl_get_server_send_pkey(const SSL *s);
if ((cpk = ssl_get_server_send_pkey(s)) == NULL) {
certpkey = ssl_get_server_send_pkey(s);