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The Bouncy Castle Crypto package is a Java implementation of cryptographic algorithms. This jar contains JCE provider and lightweight API for the Bouncy Castle Cryptography APIs for JDK 1.4.

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package org.bouncycastle.asn1.cms;

import org.bouncycastle.asn1.ASN1EncodableVector;
import org.bouncycastle.asn1.ASN1Integer;
import org.bouncycastle.asn1.ASN1Object;
import org.bouncycastle.asn1.ASN1OctetString;
import org.bouncycastle.asn1.ASN1Primitive;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.BERSequence;
import org.bouncycastle.asn1.DERIA5String;

/**
 * RFC 5544:
 * Binding Documents with Time-Stamps; TimeStampedData object.
 * 
 *  
 * TimeStampedData ::= SEQUENCE {
 *   version              INTEGER { v1(1) },
 *   dataUri              IA5String OPTIONAL,
 *   metaData             MetaData OPTIONAL,
 *   content              OCTET STRING OPTIONAL,
 *   temporalEvidence     Evidence
 * }
 *


 */
public class TimeStampedData
    extends ASN1Object
{
    private ASN1Integer version;
    private DERIA5String dataUri;
    private MetaData metaData;
    private ASN1OctetString content;
    private Evidence temporalEvidence;

    public TimeStampedData(DERIA5String dataUri, MetaData metaData, ASN1OctetString content, Evidence temporalEvidence)
    {
        this.version = new ASN1Integer(1);
        this.dataUri = dataUri;
        this.metaData = metaData;
        this.content = content;
        this.temporalEvidence = temporalEvidence;
    }

    private TimeStampedData(ASN1Sequence seq)
    {
        this.version = ASN1Integer.getInstance(seq.getObjectAt(0));

        int index = 1;
        if (seq.getObjectAt(index) instanceof DERIA5String)
        {
            this.dataUri = DERIA5String.getInstance(seq.getObjectAt(index++));
        }
        if (seq.getObjectAt(index) instanceof MetaData || seq.getObjectAt(index) instanceof ASN1Sequence)
        {
            this.metaData = MetaData.getInstance(seq.getObjectAt(index++));
        }
        if (seq.getObjectAt(index) instanceof ASN1OctetString)
        {
            this.content = ASN1OctetString.getInstance(seq.getObjectAt(index++));
        }
        this.temporalEvidence = Evidence.getInstance(seq.getObjectAt(index));
    }

    /**
     * Return a TimeStampedData object from the given object.
     *

* Accepted inputs: * * null → null * {@link RecipientKeyIdentifier} object * {@link org.bouncycastle.asn1.ASN1Sequence#getInstance(java.lang.Object) ASN1Sequence} input formats with TimeStampedData structure inside * * * @param obj the object we want converted. * @exception IllegalArgumentException if the object cannot be converted. */ public static TimeStampedData getInstance(Object obj) { if (obj == null || obj instanceof TimeStampedData) { return (TimeStampedData)obj; } return new TimeStampedData(ASN1Sequence.getInstance(obj)); } public DERIA5String getDataUri() { return dataUri; } public MetaData getMetaData() { return metaData; } public ASN1OctetString getContent() { return content; } public Evidence getTemporalEvidence() { return temporalEvidence; } public ASN1Primitive toASN1Primitive() { ASN1EncodableVector v = new ASN1EncodableVector(5); v.add(version); if (dataUri != null) { v.add(dataUri); } if (metaData != null) { v.add(metaData); } if (content != null) { v.add(content); } v.add(temporalEvidence); return new BERSequence(v); } }