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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.ASN1Primitive;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.ASN1Set;
import org.bouncycastle.asn1.ASN1TaggedObject;
import org.bouncycastle.asn1.BERSequence;
import org.bouncycastle.asn1.BERTaggedObject;

/**
 * RFC 5652 EncryptedData object.
 * 
 *  
 * EncryptedData ::= SEQUENCE {
 *     version CMSVersion,
 *     encryptedContentInfo EncryptedContentInfo,
 *     unprotectedAttrs [1] IMPLICIT UnprotectedAttributes OPTIONAL }
 *


 */
public class EncryptedData
    extends ASN1Object
{
    private ASN1Integer version;
    private EncryptedContentInfo encryptedContentInfo;
    private ASN1Set unprotectedAttrs;

    /**
     * Return an EncryptedData object from the given object.
     *

* Accepted inputs: * * null → null * {@link EncryptedData} object * {@link org.bouncycastle.asn1.ASN1Sequence#getInstance(java.lang.Object) ASN1Sequence} input formats * * * @param o the object we want converted. * @exception IllegalArgumentException if the object cannot be converted. */ public static EncryptedData getInstance(Object o) { if (o instanceof EncryptedData) { return (EncryptedData)o; } if (o != null) { return new EncryptedData(ASN1Sequence.getInstance(o)); } return null; } public EncryptedData(EncryptedContentInfo encInfo) { this(encInfo, null); } public EncryptedData(EncryptedContentInfo encInfo, ASN1Set unprotectedAttrs) { this.version = new ASN1Integer((unprotectedAttrs == null) ? 0 : 2); this.encryptedContentInfo = encInfo; this.unprotectedAttrs = unprotectedAttrs; } private EncryptedData(ASN1Sequence seq) { this.version = ASN1Integer.getInstance(seq.getObjectAt(0)); this.encryptedContentInfo = EncryptedContentInfo.getInstance(seq.getObjectAt(1)); if (seq.size() == 3) { this.unprotectedAttrs = ASN1Set.getInstance((ASN1TaggedObject)seq.getObjectAt(2), false); } } public ASN1Integer getVersion() { return version; } public EncryptedContentInfo getEncryptedContentInfo() { return encryptedContentInfo; } public ASN1Set getUnprotectedAttrs() { return unprotectedAttrs; } /** * @return a basic ASN.1 object representation. */ public ASN1Primitive toASN1Primitive() { ASN1EncodableVector v = new ASN1EncodableVector(3); v.add(version); v.add(encryptedContentInfo); if (unprotectedAttrs != null) { v.add(new BERTaggedObject(false, 1, unprotectedAttrs)); } return new BERSequence(v); } }