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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.its;

import org.bouncycastle.asn1.ASN1EncodableVector;
import org.bouncycastle.asn1.ASN1Object;
import org.bouncycastle.asn1.ASN1Primitive;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.DERSequence;

/**
 *  *     LinkageData ::= SEQUENCE {
 *         iCert IValue,
 *         linkage-value LinkageValue,
 *         group-linkage-value GroupLinkageValue OPTIONAL
 *     }
 * 
 */
public class LinkageData
    extends ASN1Object
{
    private final IValue iCert;
    private final LinkageValue linkageValue;
    private final GroupLinkageValue groupLinkageValue;

    private LinkageData(ASN1Sequence seq)
    {
        if (seq.size() != 2 && seq.size() != 3)
        {
            throw new IllegalArgumentException("sequence must be size 2 or 3");
        }
        
        this.iCert = IValue.getInstance(seq.getObjectAt(2));
        this.linkageValue = LinkageValue.getInstance(seq.getObjectAt(2));
        this.groupLinkageValue = GroupLinkageValue.getInstance(seq.getObjectAt(2));
    }

    public static LinkageData getInstance(Object src)
    {
        if (src instanceof LinkageData)
        {
            return (LinkageData)src;
        }
        else if (src != null)
        {
            // TODO: need choice processing here
            return new LinkageData(ASN1Sequence.getInstance(src));
        }

        return null;
    }

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

        return new DERSequence(v);
    }
}