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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.its;

import org.bouncycastle.oer.its.ieee1609dot2.PKRecipientInfo;
import org.bouncycastle.oer.its.ieee1609dot2.RecipientInfo;
import org.bouncycastle.oer.its.ieee1609dot2.basetypes.HashedId8;

public class ETSIRecipientInfoBuilder
{

    private final ETSIKeyWrapper keyWrapper;
    private final byte[] recipientID;

    public ETSIRecipientInfoBuilder(ETSIKeyWrapper keyWrapper, byte[] recipientID)
    {
        this.keyWrapper = keyWrapper;
        this.recipientID = recipientID;
    }


    public RecipientInfo build(byte[] secretKey)
    {
        try
        {
            return RecipientInfo.certRecipInfo(PKRecipientInfo.builder()
                .setRecipientId(new HashedId8(recipientID))
                .setEncKey(keyWrapper.wrap(secretKey))
                .createPKRecipientInfo());
        }
        catch (Exception ex)
        {
            throw new RuntimeException(ex.getMessage(), ex);
        }

    }


}