X509V3_ADD_REPLACE_EXISTING
case X509V3_ADD_REPLACE_EXISTING:
op = X509V3_ADD_REPLACE_EXISTING;
op = X509V3_ADD_REPLACE_EXISTING;
op = X509V3_ADD_REPLACE_EXISTING;
op = X509V3_ADD_REPLACE_EXISTING | X509V3_ADD_SILENT;