pack static method
Implementation
static Uint8List pack(int tag, Iterable<int> content) {
// TODO check tag is octect
final encodedLength = ASN1Object.encodeLength(content.length);
final ret = Uint8List(1 + encodedLength.length + content.length);
ret[0] = tag;
ret.setRange(1, 1 + encodedLength.length, encodedLength);
ret.setRange(1 + encodedLength.length, ret.length, content);
return ret;
}