ber.go
func parseUTF8String(bytes []byte) (ret string, err error) {
	if !utf8.Valid(bytes) {
		return "", errors.New("asn1: invalid UTF-8 string")
	}
	return string(bytes), nil
}
func parseUTF8String(bytes []byte) (ret string, err error) {
	if !utf8.Valid(bytes) {
		return "", errors.New("asn1: invalid UTF-8 string")
	}
	return string(bytes), nil
}
// UTF8String
// parseUTF8String parses a ASN.1 UTF8String (raw UTF-8) from the given byte
// array and returns it.