Discussion [Newbie ~ Sorry] Xigncode - SAOIF

[Damdou]

Hello everyone, i wanted to share with you some stuff that i've started doing a couple of days ago, i have actually no idea how to explain so i'll just paste here what i've done and if you have some time please feel free to enlighten me :) you're more than welcome ! i used windows & LdPlayer9

• Create a new folder:
  
  mkdir SAOIF
  
  
  
• Place the apk as well as apksigner.jar, apktool.jar, baksmali.jar, smali.jar inside

• Extract classes.dex from the apk using 7z:
  
  7z x sao.apk classes.dex
• Decompile classes.dex into Smali classes:
  
  java -jar baksmali.jar d classes.dex
• Modify the file ./smali/com/asobimo/AsobimoActivity/AsobimoUnityPlayerNativeActivity.smali:6:
  
  
  

  WARNING: sometimes it's ".locals" and other times ".registers", keep the original one!​

  
  .method public static IsEnableXIGNCODE()Z
  .registers 3
  
  
  const/4 v0, 0x0
  
  
  return v0
• Recompile the ./out folder of the classes into classes.dex:
  
  java -jar smali.jar a out/
• Inject the classes.dex file into the apk:
  
  1. Right-click on classes.dex
  2. 7-Zip
  3. Add to archive...
  4. Filter on all files
  5. Select the apk in the archive selection
  6. Select Zip in the archive format
  7. Click OK

• Zipalign the apk
  
  zipalign -v 4 sao.apk sao_aligned.apk
  
  
  

  Install with LuckyPatcher​

​

The game crash just after you click on "Link Start" after you select a server, if i attempt something else the game crash at the Flying Drake loading screen earlier.

Any idea what should i do from here ? i got there by using grep -rn "xigncode" . in the smali folder, then tryed this bypass :/ of course i didn't expected it to work but it's a start...

 

[Raebydett]

This bypass maybe will work when it was 2019

 

[Damdou]

Thanks for answering me, actually i'm willing to learn i just don't know what to explore, i did use Ghidra, IL2CPPDumper & Jadx even created cave code and recompiled, but still the bypass is an issue so feel free to show me the way even if it's a dead end it's always worth it