Reverse Engineering. Overview Need for RE Recovery of lost information – providing proper system documentation Assisting with maintenance – identification.

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Presentation transcript:

Reverse Engineering

Overview

Need for RE Recovery of lost information – providing proper system documentation Assisting with maintenance – identification of side effects and anomalies Migration to another hw/sw platform Facilitating software reuse

Example: Java Decompiler How to recover bytecode from.class file under Unix/Win with JDK? % javap -c % javap -help (to see the options) Java Decompilers - Jadclipse – ”ClassCracker” – “DeCafe Pro" from DeCafe, France at

Class cracker JD

Decompile.net There are two tools that I like to use to decompile Reflector – (paid) ILSpy – (free) 8

ILSpy 9

Reflector 10

Swf decompiler for flash