Example usage for org.bouncycastle.tsp TimeStampResponseGenerator generate

Introduction

In this page you can find the example usage for org.bouncycastle.tsp TimeStampResponseGenerator generate.

Prototype

public TimeStampResponse generate(TimeStampRequest request, BigInteger serialNumber, Date genTime)
        throws TSPException 

Source Link

Document

Return an appropriate TimeStampResponse.

Usage

From source file:eu.europa.esig.dss.cookbook.mock.MockTSPSource.java

License:Open Source License

@Override
public TimeStampToken getTimeStampResponse(final DigestAlgorithm digestAlgorithm, final byte[] digest)
        throws DSSException {

    final String signatureAlgorithm = getSignatureAlgorithm(digestAlgorithm, digest);

    final TimeStampRequestGenerator tsqGenerator = new TimeStampRequestGenerator();
    tsqGenerator.setCertReq(true);//from ww w.  jav a  2 s. c om

    /**
     * The code below guarantee that the dates of the two successive
     * timestamps are different. This is activated only if timestampDate is provided at
     * construction time
     */
    Date timestampDate_ = new Date();

    if (policyOid != null) {
        tsqGenerator.setReqPolicy(policyOid);
    }

    TimeStampRequest tsRequest = null;
    if (useNonce) {
        final BigInteger nonce = BigInteger.valueOf(random.nextLong());
        tsRequest = tsqGenerator.generate(new ASN1ObjectIdentifier(digestAlgorithm.getOid()), digest, nonce);
    } else {
        tsRequest = tsqGenerator.generate(new ASN1ObjectIdentifier(digestAlgorithm.getOid()), digest);
    }

    try {
        final ContentSigner sigGen = new JcaContentSignerBuilder(signatureAlgorithm).build(key);
        final JcaX509CertificateHolder certHolder = new JcaX509CertificateHolder(cert.getCertificate());

        // that to make sure we generate the same timestamp data for the
        // same timestamp date
        AttributeTable signedAttributes = new AttributeTable(new Hashtable<ASN1ObjectIdentifier, Object>());
        signedAttributes = signedAttributes.add(PKCSObjectIdentifiers.pkcs_9_at_signingTime,
                new Time(timestampDate_));
        final DefaultSignedAttributeTableGenerator signedAttributeGenerator = new DefaultSignedAttributeTableGenerator(
                signedAttributes);
        AttributeTable unsignedAttributes = new AttributeTable(new Hashtable<ASN1ObjectIdentifier, Object>());
        final SimpleAttributeTableGenerator unsignedAttributeGenerator = new SimpleAttributeTableGenerator(
                unsignedAttributes);

        final DigestCalculatorProvider digestCalculatorProvider = new BcDigestCalculatorProvider();
        SignerInfoGeneratorBuilder sigInfoGeneratorBuilder = new SignerInfoGeneratorBuilder(
                digestCalculatorProvider);
        sigInfoGeneratorBuilder.setSignedAttributeGenerator(signedAttributeGenerator);
        sigInfoGeneratorBuilder.setUnsignedAttributeGenerator(unsignedAttributeGenerator);
        final SignerInfoGenerator sig = sigInfoGeneratorBuilder.build(sigGen, certHolder);

        final DigestCalculator sha1DigestCalculator = DSSRevocationUtils.getSHA1DigestCalculator();

        final TimeStampTokenGenerator tokenGenerator = new TimeStampTokenGenerator(sig, sha1DigestCalculator,
                policyOid);
        final Set<X509Certificate> singleton = new HashSet<X509Certificate>();
        singleton.add(cert.getCertificate());
        tokenGenerator.addCertificates(new JcaCertStore(singleton));
        final TimeStampResponseGenerator generator = new TimeStampResponseGenerator(tokenGenerator,
                TSPAlgorithms.ALLOWED);

        Date responseDate = new Date();
        TimeStampResponse tsResponse = generator.generate(tsRequest, BigInteger.ONE, responseDate);
        final TimeStampToken timeStampToken = tsResponse.getTimeStampToken();
        return timeStampToken;
    } catch (OperatorCreationException e) {
        throw new DSSException(e);
    } catch (CertificateEncodingException e) {
        throw new DSSException(e);
    } catch (TSPException e) {
        throw new DSSException(e);
    }
}

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