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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.cms;

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

import org.bouncycastle.asn1.cms.OriginatorInfo;
import org.bouncycastle.cert.X509CertificateHolder;
import org.bouncycastle.util.Store;

public class OriginatorInfoGenerator
{
    private final List origCerts;
    private final List origCRLs;

    public OriginatorInfoGenerator(X509CertificateHolder origCert)
    {
        this.origCerts = new ArrayList(1);
        this.origCRLs = null;
        origCerts.add(origCert.toASN1Structure());
    }

    public OriginatorInfoGenerator(Store origCerts)
        throws CMSException
    {
        this(origCerts, null);
    }

    public OriginatorInfoGenerator(Store origCerts, Store origCRLs)
        throws CMSException
    {
        this.origCerts = CMSUtils.getCertificatesFromStore(origCerts);

        if (origCRLs != null)
        {
            this.origCRLs = CMSUtils.getCRLsFromStore(origCRLs);
        }
        else
        {
            this.origCRLs = null;
        }
    }

    public OriginatorInformation generate()
    {
        if (origCRLs != null)
        {
            return new OriginatorInformation(new OriginatorInfo(CMSUtils.createDerSetFromList(origCerts), CMSUtils.createDerSetFromList(origCRLs)));
        }
        else
        {
            return new OriginatorInformation(new OriginatorInfo(CMSUtils.createDerSetFromList(origCerts), null));
        }
    }
}