src/ch/eitchnet/privilege/helper/HashHelper.java

@@ -45,9 +45,29 @@ public class HashHelper {
 	 */
 	public static String stringToHash(String hashAlgorithm, String string) throws NoSuchAlgorithmException,
 			UnsupportedEncodingException {
+		return stringToHash(hashAlgorithm, string.getBytes());
+	}
+
+	/**
+	 * Creates the hash of the given string using {@link MessageDigest} and the defined hash algorithm
+	 * 
+	 * @param hashAlgorithm
+	 *            the algorithm to use for hashing
+	 * @param bytes
+	 *            the bytes to hash
+	 * 
+	 * @return a new string encrypted by the defined algorithm
+	 * 
+	 * @throws NoSuchAlgorithmException
+	 *             if the algorithm is not found
+	 * @throws UnsupportedEncodingException
+	 *             if something is wrong with the given string to hash
+	 */
+	public static String stringToHash(String hashAlgorithm, byte[] bytes) throws NoSuchAlgorithmException,
+			UnsupportedEncodingException {
 
 		MessageDigest digest = MessageDigest.getInstance(hashAlgorithm);
-		byte[] hashArray = digest.digest(string.getBytes());
+		byte[] hashArray = digest.digest(bytes);
 
 		byte[] hex = new byte[2 * hashArray.length];
 		int index = 0;

src/ch/eitchnet/privilege/helper/PasswordCreaterUI.java

@@ -0,0 +1,119 @@
+/*
+ * Copyright (c) 2010
+ * 
+ * Apixxo AG 
+ * Hauptgasse 25
+ * 4600 Olten
+ * 
+ * All rights reserved.
+ * 
+ */
+
+/**
+ * 
+ */
+package ch.eitchnet.privilege.helper;
+
+import java.awt.Dimension;
+import java.awt.GridLayout;
+import java.awt.Toolkit;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import java.awt.event.KeyEvent;
+import java.awt.event.KeyListener;
+
+import javax.swing.JButton;
+import javax.swing.JComboBox;
+import javax.swing.JFrame;
+import javax.swing.JLabel;
+import javax.swing.JPasswordField;
+import javax.swing.JTextField;
+import javax.swing.SwingConstants;
+
+/**
+ * Simple Swing UI to create passwords
+ * 
+ * @author rvonburg
+ */
+public class PasswordCreaterUI {
+
+	/**
+	 * Launches the UI
+	 * 
+	 * @param args
+	 *            not used
+	 */
+	public static void main(String[] args) {
+
+		JFrame.setDefaultLookAndFeelDecorated(true);
+
+		JFrame frame = new JFrame();
+		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+		frame.setTitle("Password creator");
+		frame.setLayout(new GridLayout(4, 2));
+
+		JLabel digest = new JLabel("Digest:", SwingConstants.RIGHT);
+		JLabel password = new JLabel("Password:", SwingConstants.RIGHT);
+		JLabel hash = new JLabel("Hash:", SwingConstants.RIGHT);
+
+		String[] digests = new String[] { "MD2", "MD5", "SHA-1", "SHA-256", "SHA-384", "SHA-512" };
+		final JComboBox digestCombo = new JComboBox(digests);
+		digestCombo.setSelectedIndex(3);
+		final JPasswordField passwordField = new JPasswordField();
+		final JTextField hashField = new JTextField(150);
+
+		JButton digestBtn = new JButton("Digest");
+
+		passwordField.addKeyListener(new KeyListener() {
+
+			@Override
+			public void keyTyped(KeyEvent e) {
+				//
+			}
+
+			@Override
+			public void keyReleased(KeyEvent e) {
+				//
+			}
+
+			@Override
+			public void keyPressed(KeyEvent e) {
+				hashField.setText("");
+			}
+		});
+		digestBtn.addActionListener(new ActionListener() {
+
+			@Override
+			public void actionPerformed(ActionEvent e) {
+
+				try {
+					String digest = (String) digestCombo.getSelectedItem();
+					char[] passwordChar = passwordField.getPassword();
+					String password = new String(passwordChar);
+					String hash = HashHelper.stringToHash(digest, password);
+					hashField.setText(hash);
+				} catch (Exception e1) {
+					e1.printStackTrace();
+					hashField.setText("Failed: " + e1.getLocalizedMessage());
+				}
+			}
+		});
+
+		frame.add(digest);
+		frame.add(digestCombo);
+		frame.add(password);
+		frame.add(passwordField);
+		frame.add(hash);
+		frame.add(hashField);
+		frame.add(new JLabel());
+		frame.add(digestBtn);
+
+		Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
+		int width = 500;
+		int height = 160;
+		frame.setSize(width, height);
+		frame.setLocation(screenSize.width / 2 - width, screenSize.height / 2 - height);
+
+		frame.setVisible(true);
+	}
+}