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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.ASN1GeneralizedTime;
import org.bouncycastle.asn1.ASN1Object;
import org.bouncycastle.asn1.ASN1Primitive;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.ASN1TaggedObject;
import org.bouncycastle.asn1.DERBitString;
import org.bouncycastle.asn1.DERSequence;
import org.bouncycastle.asn1.x500.X500Name;
import org.bouncycastle.asn1.x509.GeneralName;
import org.bouncycastle.asn1.x509.ReasonFlags;

/**
 *  * id-cmc-getCRL OBJECT IDENTIFIER ::= {id-cmc 16}
 *
 * GetCRL ::= SEQUENCE {
 *    issuerName    Name,
 *    cRLName       GeneralName OPTIONAL,
 *    time          GeneralizedTime OPTIONAL,
 *    reasons       ReasonFlags OPTIONAL }
 * 
 */
public class GetCRL
    extends ASN1Object
{
    private final X500Name issuerName;
    private GeneralName cRLName;
    private ASN1GeneralizedTime time;
    private ReasonFlags reasons;

    public GetCRL(X500Name issuerName, GeneralName cRLName, ASN1GeneralizedTime time, ReasonFlags reasons)
    {
        this.issuerName = issuerName;
        this.cRLName = cRLName;
        this.time = time;
        this.reasons = reasons;
    }


    private GetCRL(ASN1Sequence seq)
    {
        if (seq.size() < 1 || seq.size() > 4)
        {
            throw new IllegalArgumentException("incorrect sequence size");
        }
        this.issuerName = X500Name.getInstance(seq.getObjectAt(0));

        int index = 1;
        if (seq.size() > index && seq.getObjectAt(index).toASN1Primitive() instanceof ASN1TaggedObject)
        {
            this.cRLName = GeneralName.getInstance(seq.getObjectAt(index++));
        }
        if (seq.size() > index && seq.getObjectAt(index).toASN1Primitive() instanceof ASN1GeneralizedTime)
        {
            this.time = ASN1GeneralizedTime.getInstance(seq.getObjectAt(index++));
        }
        if (seq.size() > index && seq.getObjectAt(index).toASN1Primitive() instanceof DERBitString)
        {
            this.reasons = new ReasonFlags(DERBitString.getInstance(seq.getObjectAt(index)));
        }
    }

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

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

        return null;
    }

    public X500Name getIssuerName()
    {
        return issuerName;
    }

    public GeneralName getcRLName()
    {
        return cRLName;
    }

    public ASN1GeneralizedTime getTime()
    {
        return time;
    }

    public ReasonFlags getReasons()
    {
        return reasons;
    }

    public ASN1Primitive toASN1Primitive()
    {
        ASN1EncodableVector v = new ASN1EncodableVector(4);

        v.add(issuerName);
        if (cRLName != null)
        {
            v.add(cRLName);
        }
        if (time != null)
        {
            v.add(time);
        }
        if (reasons != null)
        {
            v.add(reasons);
        }

        return new DERSequence(v);
    }
}