code: func CheckRDNSequenceWhiteSpace(raw []byte) (leading, trailing bool, err error) {
  	var seq pkix.RDNSequence
  	if _, err = asn1.Unmarshal(raw, &seq); err != nil {
  		return
  	}
  	for _, rdn := range seq {
  		for _, atv := range rdn {
  			if !IsNameAttribute(atv.Type) {
  				continue
  			}
  			value, ok := atv.Value.(string)
  			if !ok {
  				continue
  			}
  			if leftStrip := strings.TrimLeftFunc(value, unicode.IsSpace); leftStrip != value {
  				leading = true
  			}
  			if rightStrip := strings.TrimRightFunc(value, unicode.IsSpace); rightStrip != value {
  				trailing = true
  			}
  		}
  	}
  	return
  }
docs: // CheckRDNSequenceWhiteSpace returns true if there is leading or trailing
  // whitespace in any name attribute in the sequence, respectively.