Introduction

I think it all began when I've worked on the NSC2013 crackme made by @elvanderb, long story short you had an AES128 heavily obfuscated white-box implementation to break. The thing was you could actually solve the challenge in different ways:

1. the first one was the easiest one: you didn't …

Introduction

Some months ago I came across a strange couple of functions that was kind of playing with a finite-state automaton to validate an input. At first glance, I didn't really notice it was in fact a regex being processed, that's exactly why I spent quite some time to understand …