Siba/src/org/dclermonte/siba/gui/CheckPanel.java

package org.dclermonte.siba.gui;

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileReader;
import java.io.IOException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

import javax.swing.JButton;
import javax.swing.JFileChooser;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.filechooser.FileNameExtensionFilter;

import com.jgoodies.forms.layout.ColumnSpec;
import com.jgoodies.forms.layout.FormLayout;
import com.jgoodies.forms.layout.FormSpecs;
import com.jgoodies.forms.layout.RowSpec;
import com.jgoodies.forms.layout.Sizes;

/**
 *
 * @author papa
 */
public class CheckPanel extends JPanel
{
	private static final long serialVersionUID = -1580485684838045920L;
	private JTextField textField;

	/**
	 * Create the panel.
	 */
	public CheckPanel()
	{
		setLayout(new FormLayout(
				new ColumnSpec[] { ColumnSpec.decode("2dlu"),
						new ColumnSpec(ColumnSpec.LEFT,
								Sizes.bounded(Sizes.PREFERRED, Sizes.constant("50dlu", true),
										Sizes.constant("60dlu", true)),
								1),
						new ColumnSpec(ColumnSpec.LEFT,
								Sizes.bounded(Sizes.PREFERRED, Sizes.constant("50dlu", true),
										Sizes.constant("100dlu", true)),
								1),
						ColumnSpec.decode("30dlu"), },
				new RowSpec[] { FormSpecs.LINE_GAP_ROWSPEC, RowSpec.decode("25px"), FormSpecs.RELATED_GAP_ROWSPEC,
						FormSpecs.DEFAULT_ROWSPEC, }));

		JLabel lblNewLabel = new JLabel("Sauvegarde à vérifier");
		add(lblNewLabel, "2, 2, left, center");

		JButton btnNewButton = new JButton("...");
		btnNewButton.addMouseListener(new MouseAdapter()
		{
			@Override
			public void mouseClicked(final MouseEvent e)
			{
				try
				{
					repertoireChoisi();
				}
				catch (IOException e1)
				{
					// TODO Auto-generated catch block
					e1.printStackTrace();
				}
				catch (NoSuchAlgorithmException e1)
				{
					// TODO Auto-generated catch block
					e1.printStackTrace();
				}
			}
		});

		this.textField = new JTextField();
		add(this.textField, "3, 2, fill, default");
		this.textField.setColumns(10);
		add(btnNewButton, "4, 2, left, top");

		JButton btnNewButton_1 = new JButton("Check");
		btnNewButton_1.addActionListener(new ActionListener()
		{
			@Override
			public void actionPerformed(final ActionEvent arg0)
			{
				try
				{
					check();
				}
				catch (NoSuchAlgorithmException e)
				{
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
				catch (IOException e)
				{
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
			}
		});
		add(btnNewButton_1, "3, 4");

	}

	final void check() throws IOException, NoSuchAlgorithmException
	{
		File file = new File(this.textField.getText());
		FileReader fileReader = new FileReader(file);
		char[] md5 = new char[32];
		byte[] md5byte = new byte[32];
		char[] fileToCheck = new char[(int) (file.length()) - 32];
		for (int index = 0; index < 32; index++)
		{
			md5[index] = (char) fileReader.read();
			md5byte[index] = (byte) md5[index];
		}
		fileReader.read();
		String fileNameToString = new String();
		for (int index = 36; index < (file.length() + 3); index++)
		{
			fileToCheck[index - 36] = (char) fileReader.read();
		}
		fileNameToString = String.copyValueOf(fileToCheck);
		fileReader.close();
		byte[] bytedirectoryToSave = new byte[fileToCheck.length];
		FileInputStream fileInputStream = new FileInputStream(file);
		for (int index1 = 0; index1 < fileNameToString.length(); index1++)
		{
			bytedirectoryToSave[index1] = (byte) fileInputStream.read();
		}
		fileInputStream.close();
		byte[] hash = null;
		MessageDigest messageDigest = MessageDigest.getInstance("MD5");
		hash = messageDigest.digest(bytedirectoryToSave);
		if (MessageDigest.isEqual(hash, md5byte))
		{
			System.out.println("gagné");
		}
		else
		{
			System.out.println("Perdu");
		}
	}

	/**
	 *
	 * @throws IOException
	 * @throws NoSuchAlgorithmException
	 */
	final void repertoireChoisi() throws IOException, NoSuchAlgorithmException
	{
		final JFileChooser fc = new JFileChooser();
		FileNameExtensionFilter filter = new FileNameExtensionFilter("Fichiers md5", "md5");
		fc.setAcceptAllFileFilterUsed(false);
		fc.addChoosableFileFilter(filter);
		fc.setFileSelectionMode(JFileChooser.FILES_ONLY);

		int returnVal = fc.showDialog(CheckPanel.this, "Sauvegarde à vérifier");

		if (returnVal == JFileChooser.APPROVE_OPTION)
		{
			File file = fc.getSelectedFile();
			this.textField.setText(file.getName());
		}
	}

}