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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.tsp;

import java.util.Enumeration;

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;

/**
 * Implementation of ArchiveTimeStampChain type, as defined in RFC4998 and RFC6283.
 * 
 * An ArchiveTimeStampChain corresponds to a SEQUENCE OF ArchiveTimeStamps, and has the following
 * ASN.1 Syntax:
 * 
 * ArchiveTimeStampChain ::= SEQUENCE OF ArchiveTimeStamp
 */
public class ArchiveTimeStampChain
    extends ASN1Object
{
    private ASN1Sequence archiveTimeStamps;

    /**
     * Return an ArchiveTimeStampChain from the given object.
     *
     * @param obj the object we want converted.
     * @return an ArchiveTimeStampChain instance, or null.
     * @throws IllegalArgumentException if the object cannot be converted.
     */
    public static ArchiveTimeStampChain getInstance(final Object obj)
    {
        if (obj instanceof ArchiveTimeStampChain)
        {
            return (ArchiveTimeStampChain)obj;
        }
        else if (obj != null)
        {
            return new ArchiveTimeStampChain(ASN1Sequence.getInstance(obj));
        }

        return null;
    }

    public ArchiveTimeStampChain(ArchiveTimeStamp archiveTimeStamp)
    {
        this.archiveTimeStamps = new DERSequence(archiveTimeStamp);
    }

    public ArchiveTimeStampChain(ArchiveTimeStamp[] archiveTimeStamps)
    {
        this.archiveTimeStamps = new DERSequence(archiveTimeStamps);
    }

    private ArchiveTimeStampChain(final ASN1Sequence sequence)
    {
        final ASN1EncodableVector vector = new ASN1EncodableVector(sequence.size());

        final Enumeration objects = sequence.getObjects();
        while (objects.hasMoreElements())
        {
            vector.add(ArchiveTimeStamp.getInstance(objects.nextElement()));
        }

        this.archiveTimeStamps = new DERSequence(vector);
    }

    public ArchiveTimeStamp[] getArchiveTimestamps()
    {
        ArchiveTimeStamp[] rv = new ArchiveTimeStamp[archiveTimeStamps.size()];

        for (int i = 0; i != rv.length; i++)
        {
            rv[i] = ArchiveTimeStamp.getInstance(archiveTimeStamps.getObjectAt(i));
        }

        return rv;
    }

    /**
     * Adds an {@link ArchiveTimeStamp} object to the archive timestamp chain.
     *
     * @param archiveTimeStamp the {@link ArchiveTimeStamp} to add.
     * @return returns the modified chain.
     */
    public ArchiveTimeStampChain append(final ArchiveTimeStamp archiveTimeStamp)
    {
        ASN1EncodableVector v = new ASN1EncodableVector(archiveTimeStamps.size() + 1);

        for (int i = 0; i != archiveTimeStamps.size(); i++)
        {
            v.add(archiveTimeStamps.getObjectAt(i));
        }

        v.add(archiveTimeStamp);

        return new ArchiveTimeStampChain(new DERSequence(v));
    }

    public ASN1Primitive toASN1Primitive()
    {
        return archiveTimeStamps;
    }
}