GlobalParameters.java

package com.rau.evoting.ElGamal;

import java.math.BigInteger;
import java.security.SecureRandom;

import org.bouncycastle.crypto.generators.ElGamalParametersGenerator;
import org.bouncycastle.crypto.params.ElGamalParameters;

public class GlobalParameters {

	private static volatile GlobalParameters instance;
	private static ElGamalParameters params = null;

	private GlobalParameters() {
		ElGamalParametersGenerator gen = new ElGamalParametersGenerator();
		// gen.init(200, 5, new SecureRandom());
		// params = gen.generateParameters();
		params = new ElGamalParameters(
				new BigInteger(
						"1217632165455017325599107230499272850738519365493132423159259"),
				new BigInteger(
						"895293172683390114107043256178557962436296753020590093614515"));
		System.out.println("p:" + params.getP());
		System.out.println("g:" + params.getG());

	}

	public static GlobalParameters getInstance() {
		GlobalParameters localInstance = instance;
		if (localInstance == null) {
			synchronized (GlobalParameters.class) {
				localInstance = instance;
				if (localInstance == null) {
					instance = localInstance = new GlobalParameters();
				}
			}
		}
		return localInstance;
	}

	public static ElGamalParameters getParams() {
		if (params == null)
			getInstance();

		return params;
	}

}