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

Go to download

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 a DSA Public Key.
 */
public class DSAPublicBCPGKey 
    extends BCPGObject implements BCPGKey 
{
    MPInteger    p;
    MPInteger    q;
    MPInteger    g;
    MPInteger    y;
    
    /**
     * @param in the stream to read the packet from.
     */
    public DSAPublicBCPGKey(
        BCPGInputStream    in)
        throws IOException
    {
        this.p = new MPInteger(in);
        this.q = new MPInteger(in);
        this.g = new MPInteger(in);
        this.y = new MPInteger(in);
    }

    public DSAPublicBCPGKey(
        BigInteger    p,
        BigInteger    q,
        BigInteger    g,
        BigInteger    y)
    {
        this.p = new MPInteger(p);
        this.q = new MPInteger(q);
        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 void encode(
        BCPGOutputStream    out)
        throws IOException
    {
        out.writeObject(p);
        out.writeObject(q);
        out.writeObject(g);
        out.writeObject(y);
    }
    
    /**
     * @return g
     */
    public BigInteger getG()
    {
        return g.getValue();
    }

    /**
     * @return p
     */
    public BigInteger getP()
    {
        return p.getValue();
    }

    /**
     * @return q
     */
    public BigInteger getQ()
    {
        return q.getValue();
    }

    /**
     * @return g
     */
    public BigInteger getY()
    {
        return y.getValue();
    }

}