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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 java.math.BigInteger;

import org.bouncycastle.asn1.ASN1EncodableVector;
import org.bouncycastle.asn1.ASN1Integer;
import org.bouncycastle.asn1.ASN1Object;
import org.bouncycastle.asn1.ASN1Primitive;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.DERSequence;
import org.bouncycastle.asn1.x509.GeneralName;

/**
 *  *      id-cmc-getCert OBJECT IDENTIFIER ::= {id-cmc 15}
 *
 *      GetCert ::= SEQUENCE {
 *           issuerName      GeneralName,
 *           serialNumber    INTEGER }
 * 
 */
public class GetCert extends ASN1Object
{
    private final GeneralName issuerName;
    private final BigInteger serialNumber;

    private GetCert(ASN1Sequence seq)
    {
        if (seq.size() != 2)
        {
            throw new IllegalArgumentException("incorrect sequence size");
        }
        this.issuerName = GeneralName.getInstance(seq.getObjectAt(0));
        this.serialNumber = ASN1Integer.getInstance(seq.getObjectAt(1)).getValue();
    }

    public GetCert(GeneralName issuerName, BigInteger serialNumber)
    {
        this.issuerName = issuerName;
        this.serialNumber = serialNumber;
    }

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

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

        return null;
    }

    public GeneralName getIssuerName()
    {
        return issuerName;
    }

    public BigInteger getSerialNumber()
    {
        return serialNumber;
    }

    public ASN1Primitive toASN1Primitive()
    {
        ASN1EncodableVector v = new ASN1EncodableVector(2);

        v.add(issuerName);
        v.add(new ASN1Integer(serialNumber));

        return new DERSequence(v);
    }
}