Java中使用SSHA对数据进行加密的示例

import java.awt.FlowLayout;
import java.awt.datatransfer.Clipboard;
import java.awt.datatransfer.StringSelection;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JMenuItem;
import javax.swing.JOptionPane;
import javax.swing.JPopupMenu;
import javax.swing.JTextField;
import javax.swing.WindowConstants;

public class SshaEncryptTool extends JFrame {

private static final long serialVersionUID = 8249254735235333019L;

public static void main(String[] args) {
new SshaEncryptTool().setVisible(true);
}

public SshaEncryptTool() {
initComponents();
}

private void initComponents() {

passwordLabel = new JLabel("パスワード:");
encryptButton = new JButton();
srcTextField = new JTextField(16);
targetTextField = new JTextField(34);
targetTextField.setEditable(false);

setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
setLocation(200, 400);

setTitle("パスワード暗号化ツール");
encryptButton.setText("暗号化");
encryptButton.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent event) {
encryptButtonActionPerformed(event);
}
});

targetTextField.addMouseListener(new MouseAdapter(){
public void mousePressed(MouseEvent e) {
if (e.getButton() == MouseEvent.BUTTON3) {
getPopup().show(e.getComponent(), e.getX(), e.getY());
}
}
});

FlowLayout layout = new FlowLayout();
getContentPane().setLayout(layout);

getContentPane().add(passwordLabel);
getContentPane().add(srcTextField);
getContentPane().add(encryptButton);
getContentPane().add(targetTextField);

pack();
}

private JPopupMenu getPopup() {

JPopupMenu  popup = new JPopupMenu("Popup");
JMenuItem item  = new JMenuItem("コピー");
item.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
Clipboard clipboard = getToolkit().getSystemClipboard();
String text = targetTextField.getText();
StringSelection contents = new StringSelection(text);
clipboard.setContents(contents, null);
targetTextField.requestFocus();
targetTextField.selectAll();
}
});
popup.add(item);
return popup;
}

private void encryptButtonActionPerformed(ActionEvent event) {
String password = srcTextField.getText();
if(password == null || password.trim().equals("")) {
JOptionPane.showMessageDialog(this, "パスワードを入力してください！");
srcTextField.requestFocus();
targetTextField.setText("");
} else {
SshaEncrypt ssha = SshaEncrypt.getInstance();
String ssha_password = ssha.createDigest(password);
targetTextField.setText(ssha_password);
}
}

private JLabel passwordLabel;
private JButton encryptButton;
private JTextField srcTextField;
private JTextField targetTextField;
}

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

import sun.misc.BASE64Encoder;

public class SshaEncrypt {

private static String SecretKey = "test_ssha_key_word";
private static BASE64Encoder enc = new BASE64Encoder();
private static SshaEncrypt inst = new SshaEncrypt("SHA-1");
private MessageDigest sha = null;

public static SshaEncrypt getInstance(){
return inst;
}

public SshaEncrypt(String alg) {
try {
sha = MessageDigest.getInstance(alg);
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
}
}

public String createDigest(String entity) {
return createDigest(SecretKey.getBytes(),entity);
}

public String createDigest(String salt, String entity) {
return createDigest(salt.getBytes(),entity);
}

public String createDigest(byte[] salt, String entity) {
sha.reset();
sha.update(entity.getBytes());
sha.update(salt);
byte[] pwhash = sha.digest();
return new String(enc.encode(concatenate(pwhash, salt)));
}

private static byte[] concatenate(byte[] l, byte[] r) {
byte[] b = new byte[l.length + r.length];
System.arraycopy(l, 0, b, 0, l.length);
System.arraycopy(r, 0, b, l.length, r.length);
return b;
}
}

@echo off
javac SshaEncryptTool.java
java SshaEncryptTool
pause