org.bouncycastle.bcpg.ElGamalPublicBCPGKey Maven / Gradle / Ivy

Show more of this group Show more artifacts with this name
Show all versions of bcpg-jdk15on Show documentation

The Bouncy Castle Java API for handling the OpenPGP protocol. This jar contains the OpenPGP API for JDK 1.5 to JDK 1.7. The APIs can be used in conjunction with a JCE/JCA provider such as the one provided with the Bouncy Castle Cryptography APIs.

There is a newer version: 1.70

Show newest version

package org.bouncycastle.bcpg;

import java.io.*;
import java.math.BigInteger;

/**
 * base class for an ElGamal Public Key.
 */
public class ElGamalPublicBCPGKey 
    extends BCPGObject implements BCPGKey 
{
    MPInteger    p;
    MPInteger    g;
    MPInteger    y;
    
    /**
     * 
     */
    public ElGamalPublicBCPGKey(
        BCPGInputStream    in)
        throws IOException
    {
        this.p = new MPInteger(in);
        this.g = new MPInteger(in);
        this.y = new MPInteger(in);
    }

    public ElGamalPublicBCPGKey(
        BigInteger    p,
        BigInteger    g,
        BigInteger    y)
    {
        this.p = new MPInteger(p);
        this.g = new MPInteger(g);
        this.y = new MPInteger(y);
    }
    
    /**
     *  return "PGP"
     * 
     * @see org.bouncycastle.bcpg.BCPGKey#getFormat()
     */
    public String getFormat() 
    {
        return "PGP";
    }

    /**
     * return the standard PGP encoding of the key.
     * 
     * @see org.bouncycastle.bcpg.BCPGKey#getEncoded()
     */
    public byte[] getEncoded() 
    {
        try
        { 
            ByteArrayOutputStream    bOut = new ByteArrayOutputStream();
            BCPGOutputStream         pgpOut = new BCPGOutputStream(bOut);
        
            pgpOut.writeObject(this);
        
            return bOut.toByteArray();
        }
        catch (IOException e)
        {
            return null;
        }
    }
    
    public BigInteger getP()
    {
        return p.getValue();
    }
    
    public BigInteger getG()
    {
        return g.getValue();
    }
    
    public BigInteger getY()
    {
        return y.getValue();
    }
    
    public void encode(
        BCPGOutputStream    out)
        throws IOException
    {
        out.writeObject(p);
        out.writeObject(g);
        out.writeObject(y);
    }
}