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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 1.6.

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package org.bouncycastle.asn1.x509;

import org.bouncycastle.asn1.ASN1Choice;
import org.bouncycastle.asn1.ASN1Encodable;
import org.bouncycastle.asn1.ASN1TaggedObject;
import org.bouncycastle.asn1.DERObject;
import org.bouncycastle.asn1.DERTaggedObject;

/**
 * Target structure used in target information extension for attribute
 * certificates from RFC 3281.
 * 
 * 
 *     Target  ::= CHOICE {
 *       targetName          [0] GeneralName,
 *       targetGroup         [1] GeneralName,
 *       targetCert          [2] TargetCert
 *     }
 * 
* *

* The targetCert field is currently not supported and must not be used * according to RFC 3281. */ public class Target extends ASN1Encodable implements ASN1Choice { public static final int targetName = 0; public static final int targetGroup = 1; private GeneralName targName; private GeneralName targGroup; /** * Creates an instance of a Target from the given object. *

* obj can be a Target or a {@link ASN1TaggedObject} * * @param obj The object. * @return A Target instance. * @throws IllegalArgumentException if the given object cannot be * interpreted as Target. */ public static Target getInstance(Object obj) { if (obj instanceof Target) { return (Target) obj; } else if (obj instanceof ASN1TaggedObject) { return new Target((ASN1TaggedObject)obj); } throw new IllegalArgumentException("unknown object in factory: " + obj.getClass()); } /** * Constructor from ASN1TaggedObject. * * @param tagObj The tagged object. * @throws IllegalArgumentException if the encoding is wrong. */ private Target(ASN1TaggedObject tagObj) { switch (tagObj.getTagNo()) { case targetName: // GeneralName is already a choice so explicit targName = GeneralName.getInstance(tagObj, true); break; case targetGroup: targGroup = GeneralName.getInstance(tagObj, true); break; default: throw new IllegalArgumentException("unknown tag: " + tagObj.getTagNo()); } } /** * Constructor from given details. *

* Exactly one of the parameters must be not null. * * @param type the choice type to apply to the name. * @param name the general name. * @throws IllegalArgumentException if type is invalid. */ public Target(int type, GeneralName name) { this(new DERTaggedObject(type, name)); } /** * @return Returns the targetGroup. */ public GeneralName getTargetGroup() { return targGroup; } /** * @return Returns the targetName. */ public GeneralName getTargetName() { return targName; } /** * Produce an object suitable for an ASN1OutputStream. * * Returns: * *

     *     Target  ::= CHOICE {
     *       targetName          [0] GeneralName,
     *       targetGroup         [1] GeneralName,
     *       targetCert          [2] TargetCert
     *     }
     * 
* * @return a DERObject */ public DERObject toASN1Object() { // GeneralName is a choice already so most be explicitly tagged if (targName != null) { return new DERTaggedObject(true, 0, targName); } else { return new DERTaggedObject(true, 1, targGroup); } } }




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