javascript function to java

Question

i'm trying to convert a js function to java

function keygen(code, serial) {
 code = parseInt(/([0-9-]{12})/.exec(code)[0].replace(/-/g, ''))
 return ((code + 0x26946948) ^ parseInt(serial.replace(/-/g, ''), 16)) >>> 0
}
keygen('7043-1667-03f9-f6', 'C6AD-0E40')

the code above return 214930807 which is correct number

but in java i did

private long keygens(String code) {

        int c =Integer.parseInt(code.substring(0, 12).replaceAll("[a-zA-Z-]", "").replaceFirst("^0+(?!$)", ""))+647260488;
        String s=executeVolCommand().replaceAll("[-]", "");
     long dec=Long.parseUnsignedLong(s,16);
     System.out.print(executeVolCommand());
     return (c^dec)>>>0;
}
     public String executeVolCommand()
      {
        String NEWLINE = System.getProperty("line.separator");
        StringBuffer buffer = new StringBuffer();
        try{

          Process pb = new ProcessBuilder("cmd","/c", "vol").start();  
          InputStream in = pb.getInputStream();  
          BufferedReader br = new BufferedReader(new InputStreamReader(in));  
          String line;  
          while ((line = br.readLine()) != null) {  
            buffer.append(line + NEWLINE);  
          }
        }
        catch(Exception e){e.printStackTrace();}

        String s= buffer.toString().trim();  

        String[] words = s.split(" ");

        String lastWord = words[words.length - 1];
        return lastWord;


      }

but i got this error

(C:) vsn:-961737152 (D:)
vsn:1343112398 Exception in thread "AWT-EventQueue-0" java.lang.NumberFormatException: For input string: "7043166703" at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65) at java.lang.Integer.parseInt(Integer.java:583) at java.lang.Integer.parseInt(Integer.java:615) at keygen.keygens(keygen.java:179) at keygen.access$3(keygen.java:177) at keygen$3.actionPerformed(keygen.java:152) at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022) at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2348) at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402) at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259) at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252) at java.awt.Component.processMouseEvent(Component.java:6539) at javax.swing.JComponent.processMouseEvent(JComponent.java:3324) at java.awt.Component.processEvent(Component.java:6304) at java.awt.Container.processEvent(Container.java:2239) at java.awt.Component.dispatchEventImpl(Component.java:4889) at java.awt.Container.dispatchEventImpl(Container.java:2297) at java.awt.Component.dispatchEvent(Component.java:4711) at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4904) at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4535) at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4476) at java.awt.Container.dispatchEventImpl(Container.java:2283) at java.awt.Window.dispatchEventImpl(Window.java:2746) at java.awt.Component.dispatchEvent(Component.java:4711) at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:760) at java.awt.EventQueue.access$500(EventQueue.java:97) at java.awt.EventQueue$3.run(EventQueue.java:709) at java.awt.EventQueue$3.run(EventQueue.java:703) at java.security.AccessController.doPrivileged(Native Method) at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:74) at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:84) at java.awt.EventQueue$4.run(EventQueue.java:733) at java.awt.EventQueue$4.run(EventQueue.java:731) at java.security.AccessController.doPrivileged(Native Method) at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:74) at java.awt.EventQueue.dispatchEvent(EventQueue.java:730) at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:205) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93) at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)

also, if i change 7043-1667-03f9-f6 to 0043-1667-03f9-f6 the error disappear but ofc it will give a wrong number

Also, i tried to call the js file in the java code but it return 2.14930807E8

private String keygens(String code) throws ScriptException, IOException, NoSuchMethodException {

        ScriptEngineManager manager = new ScriptEngineManager();
        ScriptEngine engine = manager.getEngineByName("JavaScript");
        // read script file
        engine.eval(Files.newBufferedReader(Paths.get("C:/Users/MJ/eclipse-workspace/SM_keygen2/js/keygen.js"), StandardCharsets.UTF_8));

        Invocable inv = (Invocable) engine;
        // call function from script file
      Object s = inv.invokeFunction("keygen", code,executeVolCommand());
      System.out.println(s);
    return s.toString();
}
     public String executeVolCommand()
      {
        String NEWLINE = System.getProperty("line.separator");
        StringBuffer buffer = new StringBuffer();
        try{

          Process pb = new ProcessBuilder("cmd","/c", "vol").start();  
          InputStream in = pb.getInputStream();  
          BufferedReader br = new BufferedReader(new InputStreamReader(in));  
          String line;  
          while ((line = br.readLine()) != null) {  
            buffer.append(line + NEWLINE);  
          }
        }
        catch(Exception e){e.printStackTrace();}

        String s= buffer.toString().trim();  

        String[] words = s.split(" ");

        String lastWord = words[words.length - 1];
        return lastWord;


      }

Appreciate any help

`2147483647` - the largest `int` value in Java, you try to parse `7043166703`. — PM 77-1, Jan 17 '20 at 01:14
@ScaryWombat oh yes, i changed it now,errors disappeared but i got 4509898103 instead of 214930807 that js function gives — JDEV, Jan 17 '20 at 01:51
maybe helpful, https://stackoverflow.com/questions/40994783/what-is-the-difference-between-operator-in-java-and-javascript — JDEV, Jan 17 '20 at 03:53

score 1 · Accepted Answer · answered Jan 17 '20 at 05:30

1

You need to use Long.parseLong number of code and serial

public class HelloWorld {
    public static void main(String[] args) {
      // result: 214930807
      System.out.println("result: " + keygen("7043-1667-03f9-f6", "C6AD-0E40") );
    }
    private static int keygen(String code, String serial) {
      return (int)((Long.parseLong(code.substring(0,12).replaceAll("[a-zA-Z-]",""))+0x26946948)^Long.parseLong(serial.replaceAll("[-]", ""),16));
    }
}

run code

answered Jan 17 '20 at 05:30

xax

26
1

Thank you very much, if possible, send me a short video or steps to mohamedjawedi93@gmail.com shows how you find out about how the license works when you used cheatengine, i'm really very interested, i spent more than 20hours without figuring it out, appreciate your help – JDEV Jan 17 '20 at 05:36
Ok, I'll do it when I have time! – xax Jan 17 '20 at 05:38

score 0 · Answer 2 · edited Jan 18 '20 at 07:13

Reference: how to replicate javascript bit-shift, bit-wise operations in java,

In Java:

Java's long type will let you get all the precision you need to replicate JavaScript bit manipulation but you need to be sure to mask it to 32 signed bits when using >>> where the shift amount might be 0 (or a multiple of 32).

So, I changed

return (c^dec)>>>0;

to

return ((c& 0xffffffffL)^dec)>>>0;

and it worked like a charm.

Thank you @PM77-1 for the helpful comment and @ScaryWombat for fixing the errors

javascript function to java

2 Answers2