internal static void ProcessAttrCert5(IX509AttributeCertificate attrCert, PkixParameters pkixParams)
 {
     try
     {
         attrCert.CheckValidity(PkixCertPathValidatorUtilities.GetValidDate(pkixParams));
     }
     catch (CertificateExpiredException cause)
     {
         throw new PkixCertPathValidatorException("Attribute certificate is not valid.", cause);
     }
     catch (CertificateNotYetValidException cause2)
     {
         throw new PkixCertPathValidatorException("Attribute certificate is not valid.", cause2);
     }
 }