parse static method

ASN1Unknown parse(
  1. MutableIterable bytes
)
override

Implementation

static ASN1Unknown parse(final MutableIterable bytes) {
  if (bytes.length < 2) {
    throw Exception('Invalid data!');
  }

  int tag = bytes.first;
  bytes.mutate = bytes.skip(1);

  final lengthBigInt = ASN1Object.decodeLength(bytes);
  int length = lengthBigInt.toInt();
  if (length == 0) {
    throw Exception('Invalid data');
  }

  if (bytes.length < length) {
    throw Exception('Invalid data');
  }

  final contentBytes = bytes.take(length).toList();
  bytes.mutate = bytes.skip(length);

  return ASN1Unknown(tag & 0x3F, Uint8List.fromList(contentBytes));
}