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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;

/**
 * General class for generating a CMS enveloped-data message.
 */
public class CMSAuthEnvelopedGenerator
    extends CMSEnvelopedGenerator
{
    final List recipientInfoGenerators = new ArrayList();

    protected CMSAttributeTableGenerator authAttrsGenerator = null;
    protected CMSAttributeTableGenerator unauthAttrsGenerator = null;

    protected OriginatorInfo originatorInfo;

    /**
     * base constructor
     */
    protected CMSAuthEnvelopedGenerator()
    {
    }


    public void setAuthenticatedAttributeGenerator(CMSAttributeTableGenerator protectedAttributeGenerator)
    {
        this.authAttrsGenerator = protectedAttributeGenerator;
    }

    public void setUnauthenticatedAttributeGenerator(CMSAttributeTableGenerator unauthenticatedAttributeGenerator)
    {
        this.unauthAttrsGenerator = unauthenticatedAttributeGenerator;
    }

    public void setOriginatorInfo(OriginatorInformation originatorInfo)
    {
        this.originatorInfo = originatorInfo.toASN1Structure();
    }

    /**
     * Add a generator to produce the recipient info required.
     *
     * @param recipientGenerator a generator of a recipient info object.
     */
    public void addRecipientInfoGenerator(RecipientInfoGenerator recipientGenerator)
    {
        recipientInfoGenerators.add(recipientGenerator);
    }
}