org.bouncycastle.asn1.oiw.ElGamalParameter Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of bcprov-ext-debug-jdk18on Show documentation

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 Java 1.8 and later with debug enabled.

The newest version!

package org.bouncycastle.asn1.oiw;

import java.math.BigInteger;
import java.util.Enumeration;

import org.bouncycastle.asn1.ASN1EncodableVector;
import org.bouncycastle.asn1.ASN1Integer;
import org.bouncycastle.asn1.ASN1Object;
import org.bouncycastle.asn1.ASN1Primitive;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.DERSequence;

public class ElGamalParameter
    extends ASN1Object
{
    ASN1Integer      p, g;

    public ElGamalParameter(
        BigInteger  p,
        BigInteger  g)
    {
        this.p = new ASN1Integer(p);
        this.g = new ASN1Integer(g);
    }

    private ElGamalParameter(
        ASN1Sequence  seq)
    {
        Enumeration     e = seq.getObjects();

        p = (ASN1Integer)e.nextElement();
        g = (ASN1Integer)e.nextElement();
    }

    public static ElGamalParameter getInstance(Object o)
    {
        if (o instanceof ElGamalParameter)
        {
            return (ElGamalParameter)o;
        }
        else if (o != null)
        {
            return new ElGamalParameter(ASN1Sequence.getInstance(o));
        }

        return null;
    }

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

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

    public ASN1Primitive toASN1Primitive()
    {
        ASN1EncodableVector v = new ASN1EncodableVector(2);

        v.add(p);
        v.add(g);

        return new DERSequence(v);
    }
}