dsaparameter.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:   DSAParameter.java

package jit.asn1.x509;

import java.util.Enumeration;
import jit.asn1.*;
import jit.math.BigInteger;

public class DSAParameter
    implements DEREncodable
{

    DERInteger p;
    DERInteger q;
    DERInteger g;

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

    public static DSAParameter getInstance(Object obj)
    {
        if(obj == null || (obj instanceof DSAParameter))
            return (DSAParameter)obj;
        if(obj instanceof ASN1Sequence)
            return new DSAParameter((ASN1Sequence)obj);
        else
            throw new IllegalArgumentException("Invalid DSAParameter: ".concat(String.valueOf(String.valueOf(obj.getClass().getName()))));
    }

    public DSAParameter(BigInteger p, BigInteger q, BigInteger g)
    {
        this.p = new DERInteger(p);
        this.q = new DERInteger(q);
        this.g = new DERInteger(g);
    }

    public DSAParameter(ASN1Sequence seq)
    {
        Enumeration e = seq.getObjects();
        p = (DERInteger)e.nextElement();
        q = (DERInteger)e.nextElement();
        g = (DERInteger)e.nextElement();
    }

    public BigInteger getP()
    {
        return p.getPositiveValue();
    }

    public BigInteger getQ()
    {
        return q.getPositiveValue();
    }

    public BigInteger getG()
    {
        return g.getPositiveValue();
    }

    public DERObject getDERObject()
    {
        ASN1EncodableVector v = new ASN1EncodableVector();
        v.add(p);
        v.add(q);
        v.add(g);
        return new DERSequence(v);
    }
}