parknert/smali2java

Recreate Java code from Smali

Smali2Java

This project attempts to create a valid Java source code from disassembled code used by Dalvik

Main goal of this project is to validate how well your obfuscation strategy works, and what the attacker would be able to gather from your source.

Read the specification here: https://source.android.com/devices/tech/dalvik/dalvik-bytecode.html

Why would you need it if there are tools like https://bytecodeviewer.com/?

• You can recreate an entire application with a single command
• Allows you to use other command line tools on the output

Prerequisites

• Go 1.18+

Building

go build

Usage

First, you'll need an APK that you want to decompile

OSX

brew install apktool
apktool d ./<your_apk>

Output

You'll get a directory, which contains among others a directory called smali

Now you can run Smali2Java on this directory:

smali2java -path_to_smali=<smali_directory>

The resulting Java files will be put beside the Smali ones.

The tool doesn't distinguish between Java and Kotlin. Decompile results will always be Java files.

License

MIT