current position:Home>How to use debugger to block TA people to view your interface and how to crack debugger interception?

How to use debugger to block TA people to view your interface and how to crack debugger interception?

2021-08-27 00:14:56 Hello harpy

This is my participation 8 The fourth of the yuegengwen challenge 3 God , Check out the activity details : 8 Yuegengwen challenge

People go high , The water flows down

demand

Recently, the leader saw a thing that seems to be very powerful , So I sent a screenshot in the group , Then we want as like as two peas , The effect is as follows :

image.png When the user clicks F12, A breakpoint appears on the page , Then click to display a blank page , It's that simple ?

Ideas

  • Here you can see , Is the use debugger To complete , As for how to use debugger It's finished ? Just write it directly in the code ? How to monitor whether the user has turned on debugging mode ? Put... Directly debugger Will writing to the code cause our web page to be unable to use normally ?
  • Sometimes thinking too much is thinking too much , Programming requires more practice , Truth comes from practice . So I hit it again , Then I found that as long as you don't turn on debugging mode , In fact, the code will not execute debugger The operation of , Just press F2 The code runs to debugger Will be suspended , Then you can see debugger Nearby content
  • But how should we judge whether the user has turned on debugging mode ? At first , I just want to execute the code to realize the breakpoint when the window size changes , But is it reasonable ? When the user clicks the breakpoint, next , May skip the current debugger You lose the interception effect you want , Or when the user opens the debug mode, the page can't listen to the window changes when the page is refreshed , So here we need a timer , It is specially used to loop monitor whether debugger Of .
  • Why do we use timers to do debugger? Mainly because we don't know when to open debugging , At the same time, it can prevent users from clicking bebugger After the jump , Invalid for interception , Using timer is a better interception method at present , Turn on debug mode and loop indefinitely debugger, Even if he clicks, he can't finish clicking .
  • We know how to hide the page content when debugging mode is turned on ? We can use time stamps to determine , Because every time debugger Will pause code execution , We just need debugger Before and after new A timestamp , The difference between the two subtractions is greater than 50 Just explain debugger 了 , This value can be set more as you think , So as to control the page to hide the content you want or display the content you want .

image.png

Code tutorial

!function() {
  var timelimit = 50;
  setInterval(function() {
    var starttime = new Date();
    debugger ;if (new Date() - starttime > timelimit) {
      window.stop();
      $("#app_open_hiden").hide();
      $("#error").show();
      $("#error").html("\u7cfb\u7edf\u68c0\u6d4b\u975e\u6cd5\u8c03\u8bd5\u002c\u8bf7\u5237\u65b0\u91cd\u8bd5\u0021")
    } else {
      $("#app_open_hiden").show();
      $("#error").hide();
    }
  }, 500)
}();
 Copy code 

matters needing attention

  • debugger Don't write code in your business logic , Otherwise, it's easy to be found that you debugger Nearby code logic
  • debugger The code can be encrypted and confused by itself , It's better to become complex or difficult to understand
  • In fact, using browser window size and page window size to compare pages is to do whether to open debugging mode , But if you separate the debug mode from the browser, you can't listen
  • In fact, some people wrote it online npm The package monitors whether the user turns on debugging mode :devtools-detect

Crack debugger

Actually know how to play debugger Everyone knows , How to let debugger Not yet , That is to click prohibit debugger Just one symbol of , The whole page doesn't appear debugger, Click the arrow to turn blue Refresh the next page and there will be no debugger, Here's the picture

image.png

copyright notice
author[Hello harpy],Please bring the original link to reprint, thank you.
https://en.qdmana.com/2021/08/20210827001450897N.html

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