surface malformed TSTInfo as TSPException in TimeStampToken

[rootvector2]

TimeStampToken parses the attacker-controlled TSTInfo eContent inside a try that catches only CMSException, so a well-formed TimeStampResp carrying a malformed TSTInfo (empty/short SEQUENCE, a non-SEQUENCE, or truncated DER) lets an unchecked IllegalArgumentException/ClassCastException/NoSuchElementException escape the TimeStampResponse(byte[]) / (InputStream) path's declared throws TSPException, IOException — the sibling TimeStampResponse(DLSequence) ctor already wraps new TimeStampToken(...), so this rethrows the parse failure as TSPException to match it.