No clue where you're based, but in the EU, this is legal. You are allowed to replicate and reverse engineer systems, as long as you do not use the original sour

No clue where you're based, but in the EU, this is legal. You are allowed to replicate and reverse engineer systems, as long as you do not use the original source code. APIs/functionality/data models/etc can't be copyrighted (again, in Europe). See http://www.bloomberg.com/news/articles/2012-05-02/copyright-can-t-block-software-reverse-engineering-court http://www.bloomberg.com/news/articles/2012-05-02/copyright-....