eu.europa.esig.dss.validation.OCSPRef.java Source code

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Here is the source code for eu.europa.esig.dss.validation.OCSPRef.java

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/**
 * 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.validation;

import java.io.IOException;
import java.security.MessageDigest;
import java.util.Arrays;

import org.apache.commons.codec.binary.Hex;
import org.bouncycastle.asn1.esf.OtherHash;
import org.bouncycastle.cert.ocsp.BasicOCSPResp;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import eu.europa.esig.dss.DSSException;
import eu.europa.esig.dss.DSSRevocationUtils;
import eu.europa.esig.dss.DSSUtils;
import eu.europa.esig.dss.DigestAlgorithm;

/**
 * Reference an OCSPResponse
 *
 *
 */

public class OCSPRef {

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

    private DigestAlgorithm digestAlgorithm = null;

    private byte[] digestValue = DSSUtils.EMPTY_BYTE_ARRAY;

    private final boolean matchOnlyBasicOCSPResponse;

    /**
     * The default constructor for OCSPRef.
     */
    public OCSPRef(final OtherHash otherHash, final boolean matchOnlyBasicOCSPResponse) {

        if (otherHash != null) { // -444

            this.digestAlgorithm = DigestAlgorithm.forOID(otherHash.getHashAlgorithm().getAlgorithm().getId());
            this.digestValue = otherHash.getHashValue();
        }
        this.matchOnlyBasicOCSPResponse = matchOnlyBasicOCSPResponse;
    }

    /**
     * The default constructor for OCSPRef.
     */
    public OCSPRef(DigestAlgorithm algorithm, byte[] digestValue, boolean matchOnlyBasicOCSPResponse) {

        this.digestAlgorithm = algorithm;
        this.digestValue = digestValue;
        this.matchOnlyBasicOCSPResponse = matchOnlyBasicOCSPResponse;
    }

    /**
     * @param ocspResp
     * @return
     */
    public boolean match(final BasicOCSPResp ocspResp) {

        if (digestAlgorithm == null) { // -444
            return false;
        }
        try {

            MessageDigest digest = DSSUtils.getMessageDigest(digestAlgorithm);
            if (matchOnlyBasicOCSPResponse) {
                digest.update(ocspResp.getEncoded());
            } else {
                digest.update(DSSRevocationUtils.fromBasicToResp(ocspResp).getEncoded());
            }
            byte[] computedValue = digest.digest();
            if (LOG.isInfoEnabled()) {
                LOG.info("Compare " + Hex.encodeHexString(digestValue) + " to computed value "
                        + Hex.encodeHexString(computedValue) + " of " + "BasicOCSPResp produced at "
                        + ocspResp.getProducedAt());
            }
            return Arrays.equals(digestValue, computedValue);
        } catch (IOException e) {
            throw new DSSException(e);
        }
    }

    public DigestAlgorithm getDigestAlgorithm() {
        return digestAlgorithm;
    }

    public byte[] getDigestValue() {
        return digestValue;
    }
}