return("format error in certificate's notBefore field");
case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
return("format error in certificate's notAfter field");
return("format error in certificate's notBefore field");
case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
return("format error in certificate's notAfter field");