ASN1BMPString.fromBytes constructor

ASN1BMPString.fromBytes(Uint8List encodedBytes)

Creates an ASN1BMPString entity from the given encodedBytes.

Implementation

ASN1BMPString.fromBytes(Uint8List encodedBytes)
    : super.fromBytes(encodedBytes) {
  if (ASN1Utils.isConstructed(encodedBytes.elementAt(0))) {
    elements = [];
    var parser = ASN1Parser(valueBytes);
    var sb = StringBuffer();
    while (parser.hasNext()) {
      var bmpString = parser.nextObject() as ASN1BMPString;
      sb.write(bmpString.stringValue);
      elements!.add(bmpString);
    }
    stringValue = sb.toString();
  } else {
    var utf16CodeUnits = <int>[];

    for (var i = 0; i < valueBytes!.length; i += 2) {
      // Combine High-Byte and Low-Byte to create a UTF-16 code unit
      var highByte = valueBytes![i];
      var lowByte = valueBytes![i + 1];
      utf16CodeUnits.add((highByte << 8) | lowByte);
    }

    // Decode UTF-16 code units into a Dart String
    stringValue = String.fromCharCodes(utf16CodeUnits);
  }
}