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The Bouncy Castle Java APIs for ASN.1 extension and utility APIs used to support bcpkix and bctls 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 and used appropriately.

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package org.bouncycastle.asn1.cmc;

import org.bouncycastle.asn1.ASN1EncodableVector;
import org.bouncycastle.asn1.ASN1Object;
import org.bouncycastle.asn1.ASN1OctetString;
import org.bouncycastle.asn1.ASN1Primitive;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.DEROctetString;
import org.bouncycastle.asn1.DERSequence;
import org.bouncycastle.asn1.cms.ContentInfo;
import org.bouncycastle.asn1.x509.AlgorithmIdentifier;
import org.bouncycastle.util.Arrays;

/**
 *  *      id-cmc-encryptedPOP OBJECT IDENTIFIER ::= {id-cmc 9}
 *
 *      EncryptedPOP ::= SEQUENCE {
 *              request       TaggedRequest,
 *              cms             ContentInfo,
 *              thePOPAlgID     AlgorithmIdentifier,
 *              witnessAlgID    AlgorithmIdentifier,
 *              witness         OCTET STRING
 *      }
 * 
 */
public class EncryptedPOP
    extends ASN1Object
{
    private final TaggedRequest request;
    private final ContentInfo cms;
    private final AlgorithmIdentifier thePOPAlgID;
    private final AlgorithmIdentifier witnessAlgID;
    private final byte[] witness;

    private EncryptedPOP(ASN1Sequence seq)
    {
        if (seq.size() != 5)
        {
            throw new IllegalArgumentException("incorrect sequence size");
        }
        this.request = TaggedRequest.getInstance(seq.getObjectAt(0));
        this.cms = ContentInfo.getInstance(seq.getObjectAt(1));
        this.thePOPAlgID = AlgorithmIdentifier.getInstance(seq.getObjectAt(2));
        this.witnessAlgID = AlgorithmIdentifier.getInstance(seq.getObjectAt(3));
        this.witness = Arrays.clone(ASN1OctetString.getInstance(seq.getObjectAt(4)).getOctets());
    }

    public EncryptedPOP(
        TaggedRequest request,
        ContentInfo cms,
        AlgorithmIdentifier thePOPAlgID,
        AlgorithmIdentifier witnessAlgID,
        byte[] witness)
    {
        this.request = request;
        this.cms = cms;
        this.thePOPAlgID = thePOPAlgID;
        this.witnessAlgID = witnessAlgID;
        this.witness = Arrays.clone(witness);
    }

    public static EncryptedPOP getInstance(Object o)
    {
        if (o instanceof EncryptedPOP)
        {
            return (EncryptedPOP)o;
        }

        if (o != null)
        {
            return new EncryptedPOP(ASN1Sequence.getInstance(o));
        }

        return null;
    }


    public TaggedRequest getRequest()
    {
        return request;
    }

    public ContentInfo getCms()
    {
        return cms;
    }

    public AlgorithmIdentifier getThePOPAlgID()
    {
        return thePOPAlgID;
    }

    public AlgorithmIdentifier getWitnessAlgID()
    {
        return witnessAlgID;
    }

    public byte[] getWitness()
    {
        return Arrays.clone(witness);
    }

    public ASN1Primitive toASN1Primitive()
    {
        ASN1EncodableVector v = new ASN1EncodableVector(5);

        v.add(request);
        v.add(cms);
        v.add(thePOPAlgID);
        v.add(witnessAlgID);
        v.add(new DEROctetString(witness));

        return new DERSequence(v);
    }
}