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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.cmp;

import java.util.Iterator;

import org.bouncycastle.asn1.ASN1Encodable;
import org.bouncycastle.asn1.ASN1EncodableVector;
import org.bouncycastle.asn1.ASN1Object;
import org.bouncycastle.asn1.ASN1Primitive;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.ASN1TaggedObject;
import org.bouncycastle.asn1.DERSequence;
import org.bouncycastle.asn1.DERTaggedObject;

/**
 * GenMsg:    {id-it 20}, RootCaCertValue | < absent >
 * GenRep:    {id-it 18}, RootCaKeyUpdateContent | < absent >
 * 
 * RootCaCertValue ::= CMPCertificate
 * 

 * RootCaKeyUpdateValue ::= RootCaKeyUpdateContent
 * 
 * RootCaKeyUpdateContent ::= SEQUENCE {
 * newWithNew       CMPCertificate,
 * newWithOld   [0] CMPCertificate OPTIONAL,
 * oldWithNew   [1] CMPCertificate OPTIONAL
 * }
 */
public class RootCaKeyUpdateContent
    extends ASN1Object
{
    private final CMPCertificate newWithNew;
    private final CMPCertificate newWithOld;
    private final CMPCertificate oldWithNew;

    public RootCaKeyUpdateContent(CMPCertificate newWithNew, CMPCertificate newWithOld, CMPCertificate oldWithNew)
    {
        if (newWithNew == null)
        {
            throw new NullPointerException("'newWithNew' cannot be null");
        }

        this.newWithNew = newWithNew;
        this.newWithOld = newWithOld;
        this.oldWithNew = oldWithNew;
    }

    private RootCaKeyUpdateContent(ASN1Sequence seq)
    {
        if (seq.size() < 1 || seq.size() > 3)
        {
            throw new IllegalArgumentException("expected sequence of 1 to 3 elements only");
        }

        CMPCertificate newWithNew;
        CMPCertificate newWithOld = null;
        CMPCertificate oldWithNew = null;

        Iterator encodable = seq.iterator();

        newWithNew = CMPCertificate.getInstance(encodable.next());
        while (encodable.hasNext())
        {
            ASN1TaggedObject ato = ASN1TaggedObject.getInstance(encodable.next());
            if (ato.getTagNo() == 0)
            {
                newWithOld = CMPCertificate.getInstance(ato);
            }
            else if (ato.getTagNo() ==  1 )
            {
                oldWithNew = CMPCertificate.getInstance(ato);
            }
        }

        this.newWithNew = newWithNew;
        this.newWithOld = newWithOld;
        this.oldWithNew = oldWithNew;
    }

    public static RootCaKeyUpdateContent getInstance(Object o)
    {
        if (o instanceof RootCaKeyUpdateContent)
        {
            return (RootCaKeyUpdateContent)o;
        }
        if (o != null)
        {
            return new RootCaKeyUpdateContent(ASN1Sequence.getInstance(o));
        }
        return null;
    }

    public CMPCertificate getNewWithNew()
    {
        return newWithNew;
    }

    public CMPCertificate getNewWithOld()
    {
        return newWithOld;
    }

    public CMPCertificate getOldWithNew()
    {
        return oldWithNew;
    }

    public ASN1Primitive toASN1Primitive()
    {
        ASN1EncodableVector v = new ASN1EncodableVector(3);
        v.add(newWithNew);

        if (newWithOld != null)
        {
            v.add(new DERTaggedObject(true, 0, newWithOld));
        }
        if (oldWithNew != null)
        {
            v.add(new DERTaggedObject(true, 1, oldWithNew));
        }
        return new DERSequence(v);
    }
}