algorithmidentifier.java

进行与数字证书相关开发必须的java源码

// Decompiled by Jad v1.5.7g. Copyright 2000 Pavel Kouznetsov.
// Jad home page: http://www.geocities.com/SiliconValley/Bridge/8617/jad.html
// Decompiler options: packimports(3) fieldsfirst ansi 
// Source File Name:   AlgorithmIdentifier.java

package jit.asn1.x509;

import jit.asn1.*;

public class AlgorithmIdentifier extends ASN1Encodable
{

    private DERObjectIdentifier objectId;
    private DEREncodable parameters;
    private boolean parametersDefined;

    public static AlgorithmIdentifier getInstance(ASN1TaggedObject obj, boolean explicit)
    {
        return getInstance(ASN1Sequence.getInstance(obj, explicit));
    }

    public static AlgorithmIdentifier getInstance(Object obj)
    {
        if(obj instanceof AlgorithmIdentifier)
            return (AlgorithmIdentifier)obj;
        if(obj instanceof DERObjectIdentifier)
            return new AlgorithmIdentifier((DERObjectIdentifier)obj);
        if(obj instanceof String)
            return new AlgorithmIdentifier((String)obj);
        if(obj instanceof ASN1Sequence)
            return new AlgorithmIdentifier((ASN1Sequence)obj);
        else
            throw new IllegalArgumentException("unknown object in factory");
    }

    public AlgorithmIdentifier(DERObjectIdentifier objectId)
    {
        parametersDefined = false;
        this.objectId = objectId;
    }

    public AlgorithmIdentifier(String objectId)
    {
        parametersDefined = false;
        this.objectId = new DERObjectIdentifier(objectId);
    }

    public AlgorithmIdentifier(DERObjectIdentifier objectId, DEREncodable parameters)
    {
        parametersDefined = false;
        parametersDefined = true;
        this.objectId = objectId;
        this.parameters = parameters;
    }

    public AlgorithmIdentifier(ASN1Sequence seq)
    {
        parametersDefined = false;
        objectId = (DERObjectIdentifier)seq.getObjectAt(0);
        if(seq.size() == 2)
        {
            parametersDefined = true;
            parameters = seq.getObjectAt(1);
        } else
        {
            parameters = null;
        }
    }

    public DERObjectIdentifier getObjectId()
    {
        return objectId;
    }

    public DEREncodable getParameters()
    {
        return parameters;
    }

    public DERObject toASN1Object()
    {
        ASN1EncodableVector v = new ASN1EncodableVector();
        v.add(objectId);
        if(parametersDefined)
            v.add(parameters);
        return new DERSequence(v);
    }
}