X509_set_serialNumber
if (!X509_set_serialNumber(x509ss, req_config.serial))
if (!X509_set_serialNumber(x, bs))
if (!X509_set_serialNumber(x, x509_config.sno))
} else if (!X509_set_serialNumber(x, x509_config.sno))
int X509_set_serialNumber(X509 *x, ASN1_INTEGER *serial);