Algorithms.Asymmetric.blockElGamal.java Source code

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Here is the source code for Algorithms.Asymmetric.blockElGamal.java

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package Algorithms.Asymmetric;

import Algorithms.CrypticAlgo;
import Algorithms.CrypticObject;
import org.bouncycastle.util.Arrays;
import org.jfree.data.xy.XYSeries;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

/**
 *
 * @author Sneh
 */
public class blockElGamal implements Algorithms.CrypticAlgo {

    int beg, end, length;
    byte[] msgBytes;
    CrypticObject crypt;
    ApplicationContext context;
    Algorithms.CrypticAlgo algo;

    @Override
    public CrypticObject encrypt(byte[] message) {

        context = new ClassPathXmlApplicationContext("spring.xml");
        algo = (CrypticAlgo) context.getBean("basicElGamal");
        CrypticObject tmp;
        crypt = new CrypticObject();
        crypt.data = msgBytes;
        int sTime, eTime;

        beg = 0;
        length = message.length;
        sTime = eTime = 0;

        while (beg < length) {
            end = (beg + 19 >= length) ? (length) : (beg + 19);
            msgBytes = Arrays.copyOfRange(message, beg, end);
            tmp = algo.encrypt(msgBytes);

            crypt.time += tmp.time;
            crypt.data = Arrays.concatenate(crypt.data, tmp.data);
            beg += 19;

        }

        return crypt;
    }

    @Override
    public CrypticObject decrypt(byte[] message) {
        CrypticObject tmp;
        crypt = new CrypticObject();
        int sTime, eTime;

        beg = 0;
        length = message.length;
        sTime = eTime = 0;

        while (beg < length) {
            end = (beg + 40 >= length) ? (length) : (beg + 40);
            msgBytes = Arrays.copyOfRange(message, beg, end);
            tmp = algo.decrypt(msgBytes);

            crypt.time += tmp.time;
            crypt.data = Arrays.concatenate(crypt.data, tmp.data);
            beg += 40;

        }

        return crypt;
    }

    @Override
    public XYSeries getEncryptionDataSet() {
        context = new ClassPathXmlApplicationContext("spring.xml");
        algo = (CrypticAlgo) context.getBean("basicElGamal");
        return algo.getEncryptionDataSet();
    }

    @Override
    public XYSeries getDecryptionDataSet() {
        return algo.getDecryptionDataSet();
    }

}