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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 1.8 and up. 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.its.bc;

import org.bouncycastle.crypto.params.ECPublicKeyParameters;
import org.bouncycastle.its.ITSCertificate;
import org.bouncycastle.its.ITSExplicitCertificateBuilder;
import org.bouncycastle.its.ITSPublicEncryptionKey;
import org.bouncycastle.its.operator.ITSContentSigner;
import org.bouncycastle.oer.its.ieee1609dot2.CertificateId;
import org.bouncycastle.oer.its.ieee1609dot2.ToBeSignedCertificate;

public class BcITSExplicitCertificateBuilder
    extends ITSExplicitCertificateBuilder
{
    /**
     * Base constructor for an ITS certificate.
     *
     * @param signer         the content signer to be used to generate the signature validating the certificate.
     * @param tbsCertificate
     */
    public BcITSExplicitCertificateBuilder(ITSContentSigner signer, ToBeSignedCertificate.Builder tbsCertificate)
    {
        super(signer, tbsCertificate);
    }

    public ITSCertificate build(
        CertificateId certificateId,
        ECPublicKeyParameters verificationKey)
    {

        return build(certificateId, verificationKey, null);
    }

    public ITSCertificate build(
        CertificateId certificateId,
        ECPublicKeyParameters verificationKey,
        ECPublicKeyParameters encryptionKey)
    {
        ITSPublicEncryptionKey publicEncryptionKey = null;
        if (encryptionKey != null)
        {
            publicEncryptionKey = new BcITSPublicEncryptionKey(encryptionKey);
        }

        return super.build(certificateId, new BcITSPublicVerificationKey(verificationKey), publicEncryptionKey);
    }
}