}
private List<ASN1Object> asn1ObjectToSequence(ASN1Object ob, int expectedSize) {
if(ob instanceof ASN1Sequence) {
final ASN1Sequence seq = (ASN1Sequence) ob;
if(seq.getItems().size() != expectedSize) {
throw new IllegalArgumentException();
}
return seq.getItems();
}
throw new IllegalArgumentException();
}