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package org.bouncycastle.asn1.x509;
import org.bouncycastle.asn1.ASN1Choice;
import org.bouncycastle.asn1.ASN1Object;
import org.bouncycastle.asn1.ASN1Primitive;
import org.bouncycastle.asn1.ASN1TaggedObject;
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 ASN1Object 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 == null || 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 ASN1Primitive
*/
public ASN1Primitive toASN1Primitive()
{
// 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);
}
}
}