![]() ![]() No fancy JavaScript-based interface, just a plain HTML site. When I saw the homepage of CFR the first time, the project quickly gained my sympathy. Next, let me show you which decompilers I was particularly interested in, and how to install them. We can either use jadx to directly decompile the APK, or we can use Enjarify which enables us to make use of more classical Java decompilers. To sum up, the following figure illustrates both options we have. By contrast, Enjarify is designed to work in as many cases as possible, even for code where Dex2jar would fail.įind more details in the project’s README file.Įnjarify outputs-as the name suggests-a JAR file.įrom there, several popular tools can be used to reconstruct Java source code. It works reasonably well most of the time, but a lot of obscure features or edge cases will cause it to fail or even silently produce incorrect results. It advertises to work better for several edge cases: class files.ĭex2jar is undoubtedly the most commonly known tool to do this. The second approach requires some mechanism to translate. I saw that a lot of APK analyzers rely on it, which probably means that it does a good job. ![]() If your target is an APK file, you should definitely give this tool a try. we translate the Dalvik bytecode to JVM bytecode and use a normal Java decompiler from there.įor the first approach, jadx is the way to go.either we find a decompiler that directly reconstructs the source code from Dalvik bytecode, or.That means, to reconstruct the source code for an APK file, there are two approaches: class files inside JARs, Dalvik bytecode is found in. When an Android app is built, the sources would first be compiled into JVM bytecode.Īfter that, the JVM bytecode is compiled into Dalvik bytecode. Let’s start with what JAR files and APK files have in common. This post serves as a little reference on how to build and use these tools. Hence, I did a little research to find more decompilers that use different approaches. Previously, I had only used the legendary JD-GUI as a decompiler for some CTF challenges.īut when dealing with more complex code, I found that looking at the output of different decompilers can help. In the past few days, I had some fun trying to understand the inner workings of an APK file.
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