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Reverse Engineering android apps -Part. 1

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Tooluri necesare:

<Dex-2-Jar> https://github.com/pxb1988/dex2jar

<JD-GUI>http://java-decompiler.github.io/

<Apk Tool> http://java-decompiler.github.io/

 

In primul rand va trebuie o aplicatie apk: https://apkpure.com/login-and-register-application/com.utpalchoudhary.mytestapplication (am ales o aplicatie care are sistem de login).

 

Eu propun ca toate tool-urile si apk-ul de sus sa fie in acelasi fisier.

WINDOWS:

 Daca sunteti pe Windows trebuie sa deschideti CMD si sa dati cd in partitia D.

 

PASI:

1. cd <fisierul>

2.cd dex2jar-2.0

Acum trebuie sa transformam aplicatia din .apk in .jar.

3.d2j-dexja2jar.bat -f  ./<aplicatie>.apk

Dupa ce aceasta comanda este pusa in functiune, in fisierul cu "dex2jar-2.0" o sa apara aplicatia dumneavoastra sub forma de .jar

Acum intram in JD-GUI si urcam aplicatia noastra cu .jar <https://imgur.com/xEWCIK4>  Acest pas a fost facut pentru a vizualiza codul sursa 

4. Iesim din directorul cu dex2jar  folosind comanda cd ..

5.apktool.jar d <aplicatie>.apk - aplicatia noastra va fi transformata intr-un fisier si va putea fi editata.

 

In partea a 2 a o sa fac cum sa refaceti apk-ul inapoi si ceva modificari.

 

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