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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.x509;

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.ASN1TaggedObject;
import org.bouncycastle.asn1.DERSequence;
import org.bouncycastle.asn1.DERTaggedObject;

public class NameConstraints
    extends ASN1Object
{
    private GeneralSubtree[] permitted, excluded;

    public static NameConstraints getInstance(Object obj)
    {
        if (obj instanceof NameConstraints)
        {
            return (NameConstraints)obj;
        }
        if (obj != null)
        {
            return new NameConstraints(ASN1Sequence.getInstance(obj));
        }

        return null;
    }

    private NameConstraints(ASN1Sequence seq)
    {
        Enumeration e = seq.getObjects();
        while (e.hasMoreElements())
        {
            ASN1TaggedObject o = ASN1TaggedObject.getInstance(e.nextElement());
            switch (o.getTagNo())
            {
                case 0:
                    permitted = createArray(ASN1Sequence.getInstance(o, false));
                    break;
                case 1:
                    excluded = createArray(ASN1Sequence.getInstance(o, false));
                    break;
            }
        }
    }

    /**
     * Constructor from a given details.
     * 
     * 

* permitted and excluded are arrays of GeneralSubtree objects. * * @param permitted * Permitted subtrees * @param excluded * Excludes subtrees */ public NameConstraints( GeneralSubtree[] permitted, GeneralSubtree[] excluded) { if (permitted != null) { this.permitted = permitted; } if (excluded != null) { this.excluded = excluded; } } private GeneralSubtree[] createArray(ASN1Sequence subtree) { GeneralSubtree[] ar = new GeneralSubtree[subtree.size()]; for (int i = 0; i != ar.length; i++) { ar[i] = GeneralSubtree.getInstance(subtree.getObjectAt(i)); } return ar; } public GeneralSubtree[] getPermittedSubtrees() { return permitted; } public GeneralSubtree[] getExcludedSubtrees() { return excluded; } /* * NameConstraints ::= SEQUENCE { permittedSubtrees [0] GeneralSubtrees * OPTIONAL, excludedSubtrees [1] GeneralSubtrees OPTIONAL } */ public ASN1Primitive toASN1Primitive() { ASN1EncodableVector v = new ASN1EncodableVector(); if (permitted != null) { v.add(new DERTaggedObject(false, 0, new DERSequence(permitted))); } if (excluded != null) { v.add(new DERTaggedObject(false, 1, new DERSequence(excluded))); } return new DERSequence(v); } }





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