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The Bouncy Castle Java APIs for CMS, PKCS, EAC, TSP, CMP, CRMF, OCSP, and certificate generation. This jar contains APIs for JDK 1.5 to JDK 1.8. The APIs can be used in conjunction with a JCE/JCA provider such as the one provided with the Bouncy Castle Cryptography APIs.

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package org.bouncycastle.dvcs;

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

import org.bouncycastle.asn1.dvcs.CertEtcToken;
import org.bouncycastle.asn1.dvcs.DVCSRequestInformationBuilder;
import org.bouncycastle.asn1.dvcs.DVCSTime;
import org.bouncycastle.asn1.dvcs.Data;
import org.bouncycastle.asn1.dvcs.ServiceType;
import org.bouncycastle.asn1.dvcs.TargetEtcChain;
import org.bouncycastle.asn1.x509.Extension;
import org.bouncycastle.cert.X509CertificateHolder;

/**
 * Builder of DVC requests to VPKC service (Verify Public Key Certificates).
 */
public class VPKCRequestBuilder
    extends DVCSRequestBuilder
{
    private List chains = new ArrayList();

    public VPKCRequestBuilder()
    {
        super(new DVCSRequestInformationBuilder(ServiceType.VPKC));
    }

    /**
     * Adds a TargetChain representing a X.509 certificate to the request.
     *
     * @param cert the certificate to be added
     */
    public void addTargetChain(X509CertificateHolder cert)
    {
        chains.add(new TargetEtcChain(new CertEtcToken(CertEtcToken.TAG_CERTIFICATE, cert.toASN1Structure())));
    }

    /**
     * Adds a TargetChain representing a single X.509 Extension to the request
     *
     * @param extension the extension to be added.
     */
    public void addTargetChain(Extension extension)
    {
        chains.add(new TargetEtcChain(new CertEtcToken(extension)));
    }

    /**
     * Adds a X.509 certificate to the request.
     *
     * @param targetChain the CertChain object to be added.
     */
    public void addTargetChain(TargetChain targetChain)
    {
        chains.add(targetChain.toASN1Structure());
    }

    public void setRequestTime(Date requestTime)
    {
        requestInformationBuilder.setRequestTime(new DVCSTime(requestTime));
    }

    /**
     * Build DVCS request to VPKC service.
     *
     * @throws DVCSException
     */
    public DVCSRequest build()
        throws DVCSException
    {
        Data data = new Data((TargetEtcChain[])chains.toArray(new TargetEtcChain[chains.size()]));

        return createDVCRequest(data);
    }
}