eu.europa.esig.dss.x509.ocsp.OfflineOCSPSource.java Source code

Introduction

Here is the source code for eu.europa.esig.dss.x509.ocsp.OfflineOCSPSource.java

Source

/**
 * DSS - Digital Signature Services
 * Copyright (C) 2015 European Commission, provided under the CEF programme
 *
 * This file is part of the "DSS - Digital Signature Services" project.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */
package eu.europa.esig.dss.x509.ocsp;

import java.util.Date;
import java.util.List;

import org.bouncycastle.cert.ocsp.BasicOCSPResp;
import org.bouncycastle.cert.ocsp.CertificateID;
import org.bouncycastle.cert.ocsp.SingleResp;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import eu.europa.esig.dss.DSSRevocationUtils;
import eu.europa.esig.dss.x509.CertificateToken;
import eu.europa.esig.dss.x509.RevocationOrigin;

/**
 * Abstract class that helps to implement an OCSPSource with an already loaded list of BasicOCSPResp
 *
 */
@SuppressWarnings("serial")
public abstract class OfflineOCSPSource implements OCSPSource {

    private static final Logger LOG = LoggerFactory.getLogger(OfflineOCSPSource.class);

    @Override
    final public OCSPToken getOCSPToken(CertificateToken certificateToken,
            CertificateToken issuerCertificateToken) {
        final List<BasicOCSPResp> containedOCSPResponses = getContainedOCSPResponses();
        if (LOG.isTraceEnabled()) {
            final String dssIdAsString = certificateToken.getDSSIdAsString();
            LOG.trace("--> OfflineOCSPSource queried for " + dssIdAsString + " contains: "
                    + containedOCSPResponses.size() + " element(s).");
        }

        /**
         * TODO: (Bob 2013.05.08) Does the OCSP responses always use SHA1?<br>
         * RFC 2560:<br>
         * CertID ::= SEQUENCE {<br>
         * hashAlgorithm AlgorithmIdentifier,<br>
         * issuerNameHash OCTET STRING, -- Hash of Issuer's DN<br>
         * issuerKeyHash OCTET STRING, -- Hash of Issuer's public key<br>
         * serialNumber CertificateSerialNumber }<br>
         *
         * ... The hash algorithm used for both these hashes, is identified in hashAlgorithm. serialNumber is the
         * serial number of the cert for which status is being requested.
         */
        Date bestUpdate = null;
        BasicOCSPResp bestBasicOCSPResp = null;
        SingleResp bestSingleResp = null;
        final CertificateID certId = DSSRevocationUtils.getOCSPCertificateID(certificateToken,
                issuerCertificateToken);
        for (final BasicOCSPResp basicOCSPResp : containedOCSPResponses) {
            for (final SingleResp singleResp : basicOCSPResp.getResponses()) {
                if (DSSRevocationUtils.matches(certId, singleResp)) {
                    final Date thisUpdate = singleResp.getThisUpdate();
                    if ((bestUpdate == null) || thisUpdate.after(bestUpdate)) {
                        bestBasicOCSPResp = basicOCSPResp;
                        bestSingleResp = singleResp;
                        bestUpdate = thisUpdate;
                    }
                }
            }
        }

        if (bestBasicOCSPResp != null) {
            OCSPToken ocspToken = new OCSPToken();
            ocspToken.setOrigin(RevocationOrigin.SIGNATURE);
            ocspToken.setBasicOCSPResp(bestBasicOCSPResp);
            ocspToken.setBestSingleResp(bestSingleResp);
            return ocspToken;
        }
        return null;
    }

    /**
     * Retrieves the list of {@code BasicOCSPResp} contained in the source.
     *
     * @return {@code List} of {@code BasicOCSPResp}s
     */
    public abstract List<BasicOCSPResp> getContainedOCSPResponses();

}