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The Bouncy Castle Java APIs for CMS, PKCS, EAC, TSP, CMP, CRMF, OCSP, and certificate generation. The APIs are designed primarily to be used in conjunction with the BC FIPS provider. The APIs may also be used with other providers although if being used in a FIPS context it is the responsibility of the user to ensure that any other providers used are FIPS certified.

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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);
        }

    }


}