利用Preferences对软件进行加密
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2022-07-13 13:36:07
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利用Preferences对软件进行加密
1.思路流程图
2.加密工具类DesUtil
package bing;
import java.io.IOException;
import java.security.SecureRandom;
import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESKeySpec;
import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;
/**
* DES加密 解密算法
*
*
*/
public class DesUtil {
private final static String DES = "DES";
private final static String ENCODE = "GBK";
public static String defaultKey = "eqweqwe-dtd*asd+gjljaslk";//自定义的秘钥
/**
* 使用 默认key 加密
*
* @param data
* 待加密数据
* @return
* @throws Exception
*/
public static String encrypt(String data) throws Exception {
byte[] bt = encrypt(data.getBytes(ENCODE), defaultKey.getBytes(ENCODE));
String strs = new BASE64Encoder().encode(bt);
return strs;
}
/**
* 使用 默认key 解密
*
* @param data
* 待解密数据
* @return
* @throws IOException
* @throws Exception
*/
public static String decrypt(String data) throws IOException, Exception {
if (data == null)
return null;
BASE64Decoder decoder = new BASE64Decoder();
byte[] buf = decoder.decodeBuffer(data);
byte[] bt = decrypt(buf, defaultKey.getBytes(ENCODE));
return new String(bt, ENCODE);
}
/**
* Description 根据键值进行加密
*
* @param data
* 待加密数据
* @param key
* **
* @return
* @throws Exception
*/
public static String encrypt(String data, String key) throws Exception {
byte[] bt = encrypt(data.getBytes(ENCODE), key.getBytes(ENCODE));
String strs = new BASE64Encoder().encode(bt);
return strs;
}
/**
* 根据键值进行解密
*
* @param data
* 待解密数据
* @param key
* **
* @return
* @throws IOException
* @throws Exception
*/
public static String decrypt(String data, String key) throws IOException,
Exception {
if (data == null)
return null;
BASE64Decoder decoder = new BASE64Decoder();
byte[] buf = decoder.decodeBuffer(data);
byte[] bt = decrypt(buf, key.getBytes(ENCODE));
return new String(bt, ENCODE);
}
/**
* Description 根据键值进行加密
*
* @param data
* @param key
* 加密键byte数组
* @return
* @throws Exception
*/
private static byte[] encrypt(byte[] data, byte[] key) throws Exception {
// 生成一个可信任的随机数源
SecureRandom sr = new SecureRandom();
// 从原始**数据创建DESKeySpec对象
DESKeySpec dks = new DESKeySpec(key);
// 创建一个**工厂，然后用它把DESKeySpec转换成SecretKey对象
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(DES);
SecretKey securekey = keyFactory.generateSecret(dks);
// Cipher对象实际完成加密操作
Cipher cipher = Cipher.getInstance(DES);
// 用**初始化Cipher对象
cipher.init(Cipher.ENCRYPT_MODE, securekey, sr);
return cipher.doFinal(data);
}
/**
* Description 根据键值进行解密
*
* @param data
* @param key
* 加密键byte数组
* @return
* @throws Exception
*/
private static byte[] decrypt(byte[] data, byte[] key) throws Exception {
// 生成一个可信任的随机数源
SecureRandom sr = new SecureRandom();
// 从原始**数据创建DESKeySpec对象
DESKeySpec dks = new DESKeySpec(key);
// 创建一个**工厂，然后用它把DESKeySpec转换成SecretKey对象
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(DES);
SecretKey securekey = keyFactory.generateSecret(dks);
// Cipher对象实际完成解密操作
Cipher cipher = Cipher.getInstance(DES);
// 用**初始化Cipher对象
cipher.init(Cipher.DECRYPT_MODE, securekey, sr);
return cipher.doFinal(data);
}
}
3.程序启动Main方法
package bing;
import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.Graphics;
import java.awt.GridLayout;
import java.awt.Image;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.IOException;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Scanner;
import java.util.prefs.Preferences;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.SwingUtilities;
public class Main {
Preferences pref = Preferences.userRoot().node(this.getClass().getName());//获取一个Preference对象
String benjizhucema = pref.get("serialnumber", "");//获取本机的***
int count = pref.getInt("count", 1)；//计数，用来更新序列码
String zhuceDate= pref.get("datea", "1970-12-10 09:53:56");//初始化注册时间
Date date=new Date();
public void zhucePanel(String serialnumber ){//注册面板
final String s=serialnumber;//本机的注册***
final JFrame jf=new JFrame();
JButton sure=new JButton("注册");
JTextField xuliema=new JTextField(s);
xuliema.setEditable(false);
JLabel shuoming =new JLabel("请输入***:");
final JTextField zhucema=new JTextField(30);
FlowLayout left=new FlowLayout(FlowLayout.LEFT);
FlowLayout center=new FlowLayout(FlowLayout.CENTER);
JPanel northp=new JPanel(center);
JPanel centerp=new JPanel();
JPanel leftp=new JPanel();
JPanel rightp=new JPanel();
JPanel south=new JPanel(center);
JPanel center1=new JPanel(left);
JPanel center2=new JPanel(center);
northp.add(xuliema);
centerp.setLayout(new GridLayout(2, 1));
center1.add(shuoming);
center2.add(zhucema);
centerp.add(center1);
centerp.add(center2);
south.add(sure);
jf.add(northp,BorderLayout.NORTH);
jf.add(leftp,BorderLayout.WEST);
jf.add(rightp,BorderLayout.EAST);
jf.add(centerp,BorderLayout.CENTER);
jf.add(south,BorderLayout.SOUTH);
jf.setSize(400, 180);
Dimension displaySize = Toolkit.getDefaultToolkit().getScreenSize(); // 获得显示器大小对象
Dimension frameSize = jf.getSize(); // 获得窗口大小对象
jf.setLocation((displaySize.width - frameSize.width) / 2, (displaySize.height - frameSize.height) / 2);
jf.setResizable(false);
jf.setVisible(true);
jf.setTitle("用户注册");
jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
sure.addActionListener(new ActionListener() {//注册按钮的单击事件
@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
String benjizhucema=zhucema.getText();//输入框填写的***
System.out.println(benjizhucema);
String rightzhucema=null;
try {
rightzhucema=DesUtil.encrypt(s, DesUtil.defaultKey);//通过传入的本机***和自定义的秘钥，生成正确的***
System.out.println(rightzhucema);
} catch (Exception e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
if(benjizhucema.equals(rightzhucema)){//判断填写的***是否和正确的***一致，如果一致把本机的***更改为正确的***，如果不一致弹出注册失败
JOptionPane.showMessageDialog(null, "恭喜你注册成功！","提示",1);
pref.put("serialnumber", rightzhucema);
Date date4=new Date();
SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
pref.put("datea", df.format(date4)); //添加注册日期
new Form();//跳转到程序界面
jf.setVisible(false);//注册框消失
}else{
JOptionPane.showMessageDialog(null, "***有误！请重新输入！","提示",1);
}
}
});
}
public boolean zhuce(String serialnumber){
//pref.put("serialnumber", "");
String rigthzhucema = null;
try {
rigthzhucema=DesUtil.encrypt(serialnumber, DesUtil.defaultKey);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
if (benjizhucema.equals(rigthzhucema)) {
return true;
}
return false;
}
//获取本机序列码
public String getSerialNumber(){
Process process = null;
try {
process = Runtime.getRuntime()
.exec(new String[] { "wmic", "diskdrive", "get",
"serialnumber" });
process.getOutputStream().close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
Scanner sc = new Scanner(process.getInputStream());
String property = sc.next();
String serial = sc.next();
return ""+pref.getInt("count", 1)+serial;
}
//日期比较方法
public void compareTime(Date now){
long time =15552000000l;
int tian=(int) (time/1000/60/60/24);
//System.out.println("--注册天数--"+tian);
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
Date zhuce=null;
try {
zhuce = sdf.parse(zhuceDate);
} catch (ParseException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
//System.out.println("--当前时间--"+sdf.format(now));
//System.out.println("--注册时间--"+sdf.format(zhuce));
long time1 = now.getTime();
long time2 = zhuce.getTime();
long time3 = time1-time2;
if(time3>=time){
//System.out.println(time3);
pref.putInt("count", count+1);
}
}
//主函数
public static void main(String[] args) {
Main m=new Main();
Date now=new Date();//当前日期
m.compareTime(now);//对比当前时间 减去注册时间是否大于预设的可用日期，如果大于，计数的count+1，不大于则不变
String s=m.getSerialNumber();//获取***（注：序列码由“count”和硬盘***组成）
//System.out.println("--序列码--"+s);
boolean b=m.zhuce(s);//传入***，判断本机Preference写入的***是否为正确的***，如果正确，跳转软件界面，否则打开注册面板
if(b){
new Form();
}else{
m.zhucePanel(s);
}
}
}