X509_DAYS_TO_UTC0
not_before = ((not_before_days - X509_DAYS_TO_UTC0) * SECONDS_PER_DAY) + not_before_seconds;
not_after = ((not_after_days - X509_DAYS_TO_UTC0) * SECONDS_PER_DAY) + not_after_seconds;
mc.days = (ve_utc / SECONDS_PER_DAY) + X509_DAYS_TO_UTC0;