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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.dvcs;

import java.util.Date;

import org.bouncycastle.asn1.ASN1Choice;
import org.bouncycastle.asn1.ASN1GeneralizedTime;
import org.bouncycastle.asn1.ASN1Object;
import org.bouncycastle.asn1.ASN1Primitive;
import org.bouncycastle.asn1.ASN1TaggedObject;
import org.bouncycastle.asn1.BERTags;
import org.bouncycastle.asn1.cms.ContentInfo;

/**
 *  *     DVCSTime ::= CHOICE  {
 *         genTime                      GeneralizedTime,
 *         timeStampToken               ContentInfo
 *     }
 * 
 */
public class DVCSTime
    extends ASN1Object
    implements ASN1Choice
{
    private final ASN1GeneralizedTime genTime;
    private final ContentInfo timeStampToken;

    // constructors:

    public DVCSTime(Date time)
    {
        this(new ASN1GeneralizedTime(time));
    }

    public DVCSTime(ASN1GeneralizedTime genTime)
    {
        this.genTime = genTime;
        this.timeStampToken = null;
    }

    public DVCSTime(ContentInfo timeStampToken)
    {
        this.genTime = null;
        this.timeStampToken = timeStampToken;
    }

    public static DVCSTime getInstance(Object obj)
    {
        if (obj instanceof DVCSTime)
        {
            return (DVCSTime)obj;
        }
        else if (obj instanceof ASN1GeneralizedTime)
        {
            return new DVCSTime(ASN1GeneralizedTime.getInstance(obj));
        }
        else if (obj != null)
        {
            return new DVCSTime(ContentInfo.getInstance(obj));
        }

        return null;
    }

    public static DVCSTime getInstance(
        ASN1TaggedObject obj,
        boolean explicit)
    {
        if (!explicit)
        {
            throw new IllegalArgumentException("choice item must be explicitly tagged");
        }

        return getInstance(ASN1TaggedObject.getInstance(obj).getObject()); // must be explicitly tagged
    }


    // selectors:

    public ASN1GeneralizedTime getGenTime()
    {
        return genTime;
    }

    public ContentInfo getTimeStampToken()
    {
        return timeStampToken;
    }

    public ASN1Primitive toASN1Primitive()
    {
        if (genTime != null)
        {
            return genTime;
        }
        else
        {
            return timeStampToken.toASN1Primitive();
        }
    }

    public String toString()
    {
        if (genTime != null)
        {
            return genTime.toString();
        }
        else
        {
            return timeStampToken.toString();
        }
    }
}