Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;

import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESKeySpec;

public class Main {
    public static String deCrypto(String txt, String key) {
        SecretKeyFactory skeyFactory = null;
        Cipher cipher = null;
        byte[] btxts = null;
        try {
            DESKeySpec desKeySpec = new DESKeySpec(key.getBytes());
            skeyFactory = SecretKeyFactory.getInstance("DES");
            cipher = Cipher.getInstance("DES");
            SecretKey deskey = skeyFactory.generateSecret(desKeySpec);
            cipher.init(Cipher.DECRYPT_MODE, deskey);
            btxts = new byte[txt.length() / 2];
            for (int i = 0, count = txt.length(); i < count; i += 2) {
                btxts[i / 2] = (byte) Integer.parseInt(txt.substring(i, i + 2), 16);
            }
            return (new String(cipher.doFinal(btxts)));
        } catch (Exception e) {
            e.printStackTrace();
        }

        return null;

    }
}