generalName method

String? generalName({ required ASN1Object item, })

Implementation

String? generalName({required ASN1Object item}) {
  var nameType = item.identifier?.tagNumber().toValue();
  if (nameType == null) {
    return null;
  }
  switch (nameType) {
    case 0:
      String? name;
      try {
        name = item.sub?.last.sub?.last.value as String?;
      } catch (e) {}
      return name;
    case 1:
    case 2:
    case 6:
      var name = item.value is String ? item.value : null;
      return name;
    case 4:
      return ASN1DistinguishedNames.string(block: item);
    case 7:
      var ip = item.value is List<int> ? item.value : null;
      if (ip != null) {
        return ip.map((e) => e.toString()).join(".");
      }
      break;
    case 8:
      var value = item.value is String ? item.value : null;
      if (value != null) {
        try {
          var data = utf8.encode(value);
          var oid = ASN1DERDecoder.decodeOid(contentData: data);
          return oid;
        } catch (e) {}
      }
      break;
    default:
      return null;
  }
  return null;
}