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GNU GENERAL PUBLIC LICENSE
Version 3, 29 June 2007
Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
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/*
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
public class CRC {
static int[] CRC16_Lookup = {
0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50A5, 0x60C6, 0x70E7,
0x8108, 0x9129, 0xA14A, 0xB16B, 0xC18C, 0xD1AD, 0xE1CE, 0xF1EF,
0x1231, 0x0210, 0x3273, 0x2252, 0x52B5, 0x4294, 0x72F7, 0x62D6,
0x9339, 0x8318, 0xB37B, 0xA35A, 0xD3BD, 0xC39C, 0xF3FF, 0xE3DE,
0x2462, 0x3443, 0x0420, 0x1401, 0x64E6, 0x74C7, 0x44A4, 0x5485,
0xA56A, 0xB54B, 0x8528, 0x9509, 0xE5EE, 0xF5CF, 0xC5AC, 0xD58D,
0x3653, 0x2672, 0x1611, 0x0630, 0x76D7, 0x66F6, 0x5695, 0x46B4,
0xB75B, 0xA77A, 0x9719, 0x8738, 0xF7DF, 0xE7FE, 0xD79D, 0xC7BC,
0x48C4, 0x58E5, 0x6886, 0x78A7, 0x0840, 0x1861, 0x2802, 0x3823,
0xC9CC, 0xD9ED, 0xE98E, 0xF9AF, 0x8948, 0x9969, 0xA90A, 0xB92B,
0x5AF5, 0x4AD4, 0x7AB7, 0x6A96, 0x1A71, 0x0A50, 0x3A33, 0x2A12,
0xDBFD, 0xCBDC, 0xFBBF, 0xEB9E, 0x9B79, 0x8B58, 0xBB3B, 0xAB1A,
0x6CA6, 0x7C87, 0x4CE4, 0x5CC5, 0x2C22, 0x3C03, 0x0C60, 0x1C41,
0xEDAE, 0xFD8F, 0xCDEC, 0xDDCD, 0xAD2A, 0xBD0B, 0x8D68, 0x9D49,
0x7E97, 0x6EB6, 0x5ED5, 0x4EF4, 0x3E13, 0x2E32, 0x1E51, 0x0E70,
0xFF9F, 0xEFBE, 0xDFDD, 0xCFFC, 0xBF1B, 0xAF3A, 0x9F59, 0x8F78,
0x9188, 0x81A9, 0xB1CA, 0xA1EB, 0xD10C, 0xC12D, 0xF14E, 0xE16F,
0x1080, 0x00A1, 0x30C2, 0x20E3, 0x5004, 0x4025, 0x7046, 0x6067,
0x83B9, 0x9398, 0xA3FB, 0xB3DA, 0xC33D, 0xD31C, 0xE37F, 0xF35E,
0x02B1, 0x1290, 0x22F3, 0x32D2, 0x4235, 0x5214, 0x6277, 0x7256,
0xB5EA, 0xA5CB, 0x95A8, 0x8589, 0xF56E, 0xE54F, 0xD52C, 0xC50D,
0x34E2, 0x24C3, 0x14A0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405,
0xA7DB, 0xB7FA, 0x8799, 0x97B8, 0xE75F, 0xF77E, 0xC71D, 0xD73C,
0x26D3, 0x36F2, 0x0691, 0x16B0, 0x6657, 0x7676, 0x4615, 0x5634,
0xD94C, 0xC96D, 0xF90E, 0xE92F, 0x99C8, 0x89E9, 0xB98A, 0xA9AB,
0x5844, 0x4865, 0x7806, 0x6827, 0x18C0, 0x08E1, 0x3882, 0x28A3,
0xCB7D, 0xDB5C, 0xEB3F, 0xFB1E, 0x8BF9, 0x9BD8, 0xABBB, 0xBB9A,
0x4A75, 0x5A54, 0x6A37, 0x7A16, 0x0AF1, 0x1AD0, 0x2AB3, 0x3A92,
0xFD2E, 0xED0F, 0xDD6C, 0xCD4D, 0xBDAA, 0xAD8B, 0x9DE8, 0x8DC9,
0x7C26, 0x6C07, 0x5C64, 0x4C45, 0x3CA2, 0x2C83, 0x1CE0, 0x0CC1,
0xEF1F, 0xFF3E, 0xCF5D, 0xDF7C, 0xAF9B, 0xBFBA, 0x8FD9, 0x9FF8,
0x6E17, 0x7E36, 0x4E55, 0x5E74, 0x2E93, 0x3EB2, 0x0ED1, 0x1EF0
};
public static int CRC16CCITT(byte[] data) {
int crc16 = 0;
for(int i= 0, n= data.length; i < n; i++ )
{
int t = (crc16 >> 8) ^ ((int)data[i] & 0xFF);
crc16 = ((crc16 << 8) & 0xffff) ^ CRC16_Lookup[t];
}
return crc16;
}
}

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src/DVDV.java Normal file
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/*
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
import java.io.*;
import java.util.List;
import javax.swing.*;
public class ESRPatch {
public static final int LBA_SIZE = 2048;
public static final int PATCH_OK = 0;
public static final int ALREADY_PATCHED = 1;
public static final int ERROR_PATCHING = 2;
public static final int NOT_UDF_ISO = 3;
public static final int NOT_PATCHED = 4;
private static RandomAccessFile iso;
private static byte[] buffer = new byte[LBA_SIZE];
public static int apply(String fileName) {
byte[] b;
int desc_crc, desc_crc_len, tag_checksum;
try {
iso = new RandomAccessFile(fileName, "rw");
// Checks if image is an UDF ISO
if(!isUDFISO()) {
iso.close();
return NOT_UDF_ISO;
}
// Checks if image is already patched
if(isAlreadyPatched()) {
iso.close();
return ALREADY_PATCHED;
}
// Backups LBA 34 into 14
iso.seek(34 * LBA_SIZE);
iso.read(buffer);
iso.seek(14 * LBA_SIZE);
iso.write(buffer);
// Backups LBA 50 into 15
iso.seek(50 * LBA_SIZE);
iso.read(buffer);
iso.seek(15 * LBA_SIZE);
iso.write(buffer);
// Updates LBA 34
iso.seek(34 * LBA_SIZE);
iso.read(buffer);
// Updates new referenced LBA: Now it points to a DVD_VIDEO structure
buffer[0xBC] = (byte) 0x80;
buffer[0xBD] = (byte) 0x00;
// Calculates new checksums
desc_crc_len = (((int)buffer[11] & 0xFF) << 8 & 0xFF00)+ ((int) buffer[10] & 0xFF);
b = new byte[desc_crc_len];
for(int i = 0; i < desc_crc_len; i++) {
b[i] = buffer[i + 16];
}
desc_crc = CRC.CRC16CCITT(b);
buffer[8] = (byte) (desc_crc & 0xFF);
buffer[9] = (byte) ((desc_crc >> 8) & 0xFF);
tag_checksum = 0;
for(int i = 0; i < 16; i++) {
if(i != 4) {
tag_checksum += buffer[i];
}
}
buffer[4] = (byte) tag_checksum;
// Save modified LBA
iso.seek(34 * LBA_SIZE);
iso.write(buffer);
// Updates LBA 50
iso.seek(50 * LBA_SIZE);
iso.read(buffer);
// Updates new referenced LBA: Now it points to a DVD_VIDEO structure
buffer[0xBC] = (byte) 0x80;
buffer[0xBD] = (byte) 0x00;
// Calculates new checksums
desc_crc_len = (((int)buffer[11] & 0xFF) << 8 & 0xFF00)+ ((int) buffer[10] & 0xFF);
b = new byte[desc_crc_len];
for(int i = 0; i < desc_crc_len; i++) {
b[i] = buffer[i + 16];
}
desc_crc = CRC.CRC16CCITT(b);
buffer[8] = (byte) (desc_crc & 0xFF);
buffer[9] = (byte) ((desc_crc >> 8) & 0xFF);
tag_checksum = 0;
for(int i = 0; i < 16; i++) {
if(i != 4) {
tag_checksum += buffer[i];
}
}
buffer[4] = (byte) tag_checksum;
// Saves modified LBA
iso.seek(50 * LBA_SIZE);
iso.write(buffer);
// Writes DVDV data
DVDV.write(iso);
return PATCH_OK;
} catch(Exception ex) {
ex.printStackTrace();
return ERROR_PATCHING;
} finally {
try {
iso.close();
} catch(Exception e) {}
}
}
private static boolean isAlreadyPatched() {
try {
iso.seek(14 * LBA_SIZE);
iso.read(buffer);
// Checks for "+NSR" magic string
if(buffer[25] == (byte) 0x2B && buffer[26] == (byte) 0x4E && buffer[27] == (byte) 0x53 && buffer[28] == (byte) 0x52) {
return true;
}
} catch(Exception ex) {
return false;
}
return false;
}
private static boolean isUDFISO() {
try {
for(int i = 1; i < 64; i++) {
iso.seek(LBA_SIZE * i + 32768);
iso.read(buffer);
// "NSR"
if (buffer[1] == (byte) 0x4E && buffer[2] == (byte) 0x53 && buffer[3] == (byte) 0x52)
return true;
}
} catch (Exception ex) {
return false;
}
return false;
}
public static int apply(List files, JFrame parent) {
String results = "";
for (int j = 0; j < files.size(); j++) {
File f = new File(files.get(j).toString());
if(f.isFile() && f.exists()) {
results += f.getName();
switch(apply(f.getPath())) {
case ESRPatch.ALREADY_PATCHED: results += " - ISO is already patched!\n"; break;
case ESRPatch.ERROR_PATCHING: results += " - Error trying to patch ISO!\n"; break;
case ESRPatch.PATCH_OK: results += " - ISO patched successfully! :)\n"; break;
case ESRPatch.NOT_UDF_ISO: results += " - Error: ISO doesn't contain UDF descriptor!\n"; break;
}
}
}
JOptionPane.showMessageDialog(parent, results, "Results:", JOptionPane.INFORMATION_MESSAGE);
return 0;
}
public static int unPatch(String fileName) {
try {
iso = new RandomAccessFile(fileName, "rw");
// Checks if image is an UDF ISO
if(!isUDFISO()) {
iso.close();
return NOT_UDF_ISO;
}
// Checks if image is not patched
if(!isAlreadyPatched()) {
iso.close();
return NOT_PATCHED;
}
// Restore LBA 14 into 34
iso.seek(14 * LBA_SIZE);
iso.read(buffer);
iso.seek(34 * LBA_SIZE);
iso.write(buffer);
// Restore LBA 15 into 50
iso.seek(15 * LBA_SIZE);
iso.read(buffer);
iso.seek(50 * LBA_SIZE);
iso.write(buffer);
// Clear backups
for(int i = 0; i < buffer.length; i++) {
buffer[i] = 0;
}
iso.seek(14 * LBA_SIZE);
iso.write(buffer);
iso.seek(15 * LBA_SIZE);
iso.write(buffer);
return PATCH_OK;
} catch(Exception ex) {
ex.printStackTrace();
return ERROR_PATCHING;
} finally {
try {
iso.close();
} catch(Exception e) {}
}
}
public static int unPatch(List files, JFrame parent) {
String results = "";
for (int j = 0; j < files.size(); j++) {
File f = new File(files.get(j).toString());
if(f.isFile() && f.exists()) {
results += f.getName();
switch(unPatch(f.getPath())) {
case ESRPatch.NOT_PATCHED: results += " - ISO is not patched!\n"; break;
case ESRPatch.ERROR_PATCHING: results += " - Error trying to unpatch ISO!\n"; break;
case ESRPatch.PATCH_OK: results += " - ISO unpatched successfully! :)\n"; break;
case ESRPatch.NOT_UDF_ISO: results += " - Error: ISO doesn't contain UDF descriptor!\n"; break;
}
}
}
JOptionPane.showMessageDialog(parent, results, "Results:", JOptionPane.INFORMATION_MESSAGE);
return 0;
}
}

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/*
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
import java.io.File;
import javax.swing.filechooser.*;
public class ISOFileFilter extends FileFilter {
public boolean accept(File f) {
if (f.isDirectory()) {
return true;
}
String extension = getExtension(f);
if (extension != null) {
if (extension.compareToIgnoreCase("iso") == 0) {
return true;
} else {
return false;
}
}
return false;
}
public String getDescription() {
return "ISO Files";
}
private String getExtension(File f) {
String ext = null;
String s = f.getName();
int i = s.lastIndexOf('.');
if (i > 0 && i < s.length() - 1) {
ext = s.substring(i+1).toLowerCase();
}
return ext;
}
}

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/*
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.awt.dnd.*;
import java.awt.datatransfer.*;
import java.util.*;
public class Main extends JFrame implements ActionListener, DropTargetListener {
private JLabel lblUsage, lblInfo1, lblInfo2;
private JButton btnPatch, btnUnpatch, btnQuit;
private JPanel pnlButtons;
public Main() {
super("ESRPatchJava v0.2.3");
Container container = getContentPane();
container.setLayout(new GridLayout(5, 1));
btnPatch = new JButton("Patch ISO...");
btnPatch.setMnemonic('P');
btnPatch.addActionListener(this);
btnUnpatch = new JButton("Unpatch ISO...");
btnUnpatch.setMnemonic('U');
btnUnpatch.addActionListener(this);
pnlButtons = new JPanel(new GridLayout(1, 2));
pnlButtons.add(btnPatch);
pnlButtons.add(btnUnpatch);
lblUsage = new JLabel("Select button below or drag and drop files here:", JLabel.LEFT);
lblInfo1 = new JLabel("(C)06/2008 - bootsector - http://www.brunofreitas.com/", JLabel.CENTER);
lblInfo2 = new JLabel("ESR Project by ffgriever", JLabel.CENTER);
btnQuit = new JButton("Close");
btnQuit.setMnemonic('C');
btnQuit.addActionListener(this);
container.add(lblUsage);
container.add(pnlButtons);
container.add(lblInfo1);
container.add(lblInfo2);
container.add(btnQuit);
setSize(450, 150);
setResizable(false);
centerFrameOnScreen(this);
new DropTarget(getContentPane(), this);
setVisible(true);
}
public static void main(String args[]) {
Main app = new Main();
app.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
private void centerFrameOnScreen(JFrame frame) {
Dimension d=Toolkit.getDefaultToolkit().getScreenSize();
Dimension f=frame.getSize();
frame.setBounds(Math.max(0, (d.width - f.width) / 2),
Math.max(0, (d.height - f.height) / 2),
f.width, f.height);
}
public void actionPerformed(ActionEvent e) {
JFileChooser fc = new JFileChooser();
fc.setFileFilter(new ISOFileFilter());
if (e.getSource() == btnQuit)
System.exit(0);
if (e.getSource() == btnPatch) {
if (fc.showOpenDialog(this) == JFileChooser.APPROVE_OPTION) {
switch(ESRPatch.apply(fc.getSelectedFile().getAbsolutePath())) {
case ESRPatch.ALREADY_PATCHED: JOptionPane.showMessageDialog(this, "ISO is already patched!", "Attention", JOptionPane.INFORMATION_MESSAGE); break;
case ESRPatch.ERROR_PATCHING: JOptionPane.showMessageDialog(this, "Error trying to patch ISO!", "Error", JOptionPane.ERROR_MESSAGE); break;
case ESRPatch.PATCH_OK: JOptionPane.showMessageDialog(this, "ISO patched successfully! :)", "Ok!", JOptionPane.INFORMATION_MESSAGE); break;
case ESRPatch.NOT_UDF_ISO: JOptionPane.showMessageDialog(this, "ISO doesn't contain UDF descriptor!", "Error", JOptionPane.ERROR_MESSAGE); break;
}
}
}
if (e.getSource() == btnUnpatch) {
if (fc.showOpenDialog(this) == JFileChooser.APPROVE_OPTION) {
switch(ESRPatch.unPatch(fc.getSelectedFile().getAbsolutePath())) {
case ESRPatch.NOT_PATCHED: JOptionPane.showMessageDialog(this, "ISO is not patched!", "Attention", JOptionPane.INFORMATION_MESSAGE); break;
case ESRPatch.ERROR_PATCHING: JOptionPane.showMessageDialog(this, "Error trying to patch ISO!", "Error", JOptionPane.ERROR_MESSAGE); break;
case ESRPatch.PATCH_OK: JOptionPane.showMessageDialog(this, "ISO unpatched successfully! :)", "Ok!", JOptionPane.INFORMATION_MESSAGE); break;
case ESRPatch.NOT_UDF_ISO: JOptionPane.showMessageDialog(this, "ISO doesn't contain UDF descriptor!", "Error", JOptionPane.ERROR_MESSAGE); break;
}
}
}
}
public void dragEnter(DropTargetDragEvent dtde) {
// System.out.println("Drag Enter");
}
public void dragExit(DropTargetEvent dte) {
// System.out.println("Drag Exit");
}
public void dragOver(DropTargetDragEvent dtde) {
// System.out.println("Drag Over");
}
public void dropActionChanged(DropTargetDragEvent dtde) {
// System.out.println("Drop Action Changed");
}
public void drop(DropTargetDropEvent dtde) {
try {
dtde.acceptDrop(DnDConstants.ACTION_COPY_OR_MOVE);
Transferable tr = dtde.getTransferable();
DataFlavor[] flavors = tr.getTransferDataFlavors();
for (int i = 0; i < flavors.length; i++) {
if (flavors[i].isFlavorJavaFileListType()) {
//dtde.acceptDrop(DnDConstants.ACTION_COPY_OR_MOVE);
java.util.List list = (java.util.List) tr.getTransferData(flavors[i]);
ArrayList<Object> filesList = new ArrayList<Object>();
for (int j = 0; j < list.size(); j++) {
filesList.add(list.get(j));
}
//Custom button text
Object[] options = {"Patch",
"Unpatch"};
int opt = JOptionPane.showOptionDialog(this,
"What would you like to do?",
"What to do?",
JOptionPane.YES_NO_OPTION,
JOptionPane.QUESTION_MESSAGE,
null,
options,
options[0]);
if(opt == JOptionPane.YES_OPTION)
ESRPatch.apply(filesList, this);
else
ESRPatch.unPatch(filesList, this);
dtde.dropComplete(true);
return;
}
//System.out.println("Drop failed: " + dtde);
dtde.rejectDrop();
}
}catch (Exception e) {
e.printStackTrace();
dtde.rejectDrop();
}
}
}