/** * Main method for stamping given file. It serves as an example of whole process in one go. * * @param filename * @param is * @return * @throws java.io.IOException * @throws org.bouncycastle.tsp.TSPException */ public byte[] stamp(String filename, InputStream is) throws IOException, TSPException { logger.entry(); logger.info("File to be stamped: {}", filename); byte[] file = getBytesFromInputStream(is); ExtendedDigest digestAlgorithm = new SHA256Digest(); // select hash algorithm ASN1ObjectIdentifier requestAlgorithm; try { requestAlgorithm = getHashObjectIdentifier(digestAlgorithm.getAlgorithmName()); } catch (IllegalArgumentException e) { logger.catching(e); throw e; } logger.info("Selected algorithm: {}", digestAlgorithm.getAlgorithmName()); // create request byte[] digest = calculateMessageDigest(file, digestAlgorithm); TimeStampRequest tsq = getTSRequest(digest, requestAlgorithm); logger.debug("TS request generated"); // send request and receive response TimeStampResponse tsr; try { tsr = getTSResponse(tsq, server); } catch (IOException | TSPException e) { logger.catching(e); throw e; } logger.debug("TSA response received"); // log reason of failure if (tsr.getFailInfo() != null) { logFailReason(tsr.getFailInfo().intValue()); return null; } // log response logResponse(tsr); logger.exit(); return tsr.getEncoded(); }