eu.europa.ec.markt.dss.signature.cades.CounterSignatureBuilder.java Source code

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Here is the source code for eu.europa.ec.markt.dss.signature.cades.CounterSignatureBuilder.java

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/*
 * DSS - Digital Signature Services
 *
 * Copyright (C) 2013 European Commission, Directorate-General Internal Market and Services (DG MARKT), B-1049 Bruxelles/Brussel
 *
 * Developed by: 2013 ARHS Developments S.A. (rue Nicolas Bov 2B, L-1253 Luxembourg) http://www.arhs-developments.com
 *
 * This file is part of the "DSS - Digital Signature Services" project.
 *
 * "DSS - Digital Signature Services" 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.
 *
 * DSS 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
 * "DSS - Digital Signature Services".  If not, see <http://www.gnu.org/licenses/>.
 */

package eu.europa.ec.markt.dss.signature.cades;

import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import eu.europa.ec.markt.dss.DSSUtils;
import eu.europa.ec.markt.dss.OID;
import eu.europa.ec.markt.dss.exception.DSSConfigurationException;
import eu.europa.ec.markt.dss.exception.DSSException;
import eu.europa.ec.markt.dss.parameter.SignatureParameters;
import eu.europa.ec.markt.dss.signature.DSSDocument;
import eu.europa.ec.markt.dss.validation102853.CertificateVerifier;
import eu.europa.ec.markt.dss.validation102853.CommonCertificateVerifier;
import eu.europa.ec.markt.dss.validation102853.tsp.TSPSource;
import org.bouncycastle.asn1.ASN1Encodable;
import org.bouncycastle.asn1.ASN1EncodableVector;
import org.bouncycastle.asn1.ASN1Object;
import org.bouncycastle.asn1.ASN1ObjectIdentifier;
import org.bouncycastle.asn1.ASN1Primitive;
import org.bouncycastle.asn1.ASN1Set;
import org.bouncycastle.asn1.DEREncodableVector;
import org.bouncycastle.asn1.DERSet;
import org.bouncycastle.asn1.DERUTF8String;
import org.bouncycastle.asn1.cms.Attribute;
import org.bouncycastle.asn1.cms.AttributeTable;
import org.bouncycastle.cms.CMSException;
import org.bouncycastle.cms.CMSSignedData;
import org.bouncycastle.cms.SignerId;
import org.bouncycastle.cms.SignerInformation;
import org.bouncycastle.cms.SignerInformationStore;

public class CounterSignatureBuilder extends CMSSignedDataBuilder {

    private CMSSignedData cmsSignedData;
    private SignerId selector;

    protected CounterSignatureBuilder(final CertificateVerifier verifier) {
        super(verifier);
    }

    public void setCmsSignedData(CMSSignedData cmsSignedData) {
        this.cmsSignedData = cmsSignedData;
    }

    public void setSelector(SignerId selector) {
        this.selector = selector;
    }

    /**
     * This method applies a countersignature to an existing signature
     * @param signedData the countersignature
     * @return the updated signature, in which the countersignature has been embedded
     */
    public CMSSignedData signDocument(final CMSSignedData signedData) {

        final ASN1ObjectIdentifier csIdentifier = OID.id_countersignature;

        //Retrieve the SignerInformation from the countersigned signature
        final SignerInformationStore originalSignerInfos = cmsSignedData.getSignerInfos();
        //Retrieve the SignerInformation from the countersignature
        final SignerInformationStore signerInfos = signedData.getSignerInfos();

        //Add the countersignature
        SignerInformation updatedSI = cmsSignedData.getSignerInfos().get(selector)
                .addCounterSigners(originalSignerInfos.get(selector), signerInfos);

        //Create updated SignerInformationStore
        Collection<SignerInformation> counterSignatureInformationCollection = new ArrayList<SignerInformation>();
        counterSignatureInformationCollection.add(updatedSI);
        SignerInformationStore signerInformationStore = new SignerInformationStore(
                counterSignatureInformationCollection);

        //Return new, updated signature
        return CMSSignedData.replaceSigners(cmsSignedData, signerInformationStore);
    }
}