Re: licence key validation method
Re: licence key validation method
- Subject: Re: licence key validation method
- From: João Varela <email@hidden>
- Date: Tue, 13 Jan 2015 00:42:06 +0000
Hi
I rolled out my own license scheme so that I don’t have to pay anyone. ;) I find that coding license checking methods with Cocoa and Objective-C is terribly unsafe. Objective-C has the nasty habit of exposing classes and their methods, which you can easily access/find out if you know what you are doing (otool and class-dump for starters). I do all my license checking code in C++ or just plain C, and use redundant checking in different places. Another trick I learned in a conference is to use critical variables as static variables rather than class ivars. However, my needs are probably different than yours, but all I’m saying be careful how you expose your licensing code if you are going to use objective C.
Please read this:
http://loadcode.blogspot.pt/2006/02/cracking-software-on-os-x.html
and this:
http://lifehacker.com/5736101/how-to-crack-just-about-any-mac-app-and-how-to-prevent-it
HTH
J. Varela
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