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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 ArchiveTimeStampSequence type, as defined in RFC4998.
 * 
 * An ArchiveTimeStampSequence corresponds to a SEQUENCE OF ArchiveTimeStampChains and has the
 * following ASN.1 Syntax:
 * 
 * ArchiveTimeStampSequence ::= SEQUENCE OF ArchiveTimeStampChain
 */
public class ArchiveTimeStampSequence
    extends ASN1Object
{
    private ASN1Sequence archiveTimeStampChains;

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

        return null;
    }

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

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

        this.archiveTimeStampChains = new DERSequence(vector);
    }

    public ArchiveTimeStampSequence(ArchiveTimeStampChain archiveTimeStampChain)
    {
        this.archiveTimeStampChains = new DERSequence(archiveTimeStampChain);
    }

    public ArchiveTimeStampSequence(ArchiveTimeStampChain[] archiveTimeStampChains)
    {
        this.archiveTimeStampChains = new DERSequence(archiveTimeStampChains);
    }

    /**
     * Returns the sequence of ArchiveTimeStamp chains that compose the ArchiveTimeStamp sequence.
     *
     * @return the {@link ASN1Sequence} containing the ArchiveTimeStamp chains.
     */
    public ArchiveTimeStampChain[] getArchiveTimeStampChains()
    {
        ArchiveTimeStampChain[] rv = new ArchiveTimeStampChain[archiveTimeStampChains.size()];

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

        return rv;
    }

    public int size()
    {
        return archiveTimeStampChains.size();
    }

    /**
     * Adds an {@link ArchiveTimeStampChain} to the ArchiveTimeStamp sequence.
     *
     * @param chain the {@link ArchiveTimeStampChain} to add
     * @return returns the modified sequence.
     */
    public ArchiveTimeStampSequence append(ArchiveTimeStampChain chain)
    {
        ASN1EncodableVector v = new ASN1EncodableVector(archiveTimeStampChains.size() + 1);

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

        v.add(chain);

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

    public ASN1Primitive toASN1Primitive()
    {
        return archiveTimeStampChains;
    }
}