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Refox protection, is it useful?
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Information générale
Forum:
Visual FoxPro
Catégorie:
Autre
Divers
Thread ID:
01471052
Message ID:
01471083
Vues:
149
>Could define limited? I have used Refox, I also distribute Refox, and I never heard that Refox protection is limited.

According to John Ryan and a few others here (I just cannot remember the names), a decent cracker (with or without a Russian accent) could break into any vfp-based stuff including your refox-protected code in a couple of minutes. That looks discouraging especially in view of the cost of the beast:(

I'd be glad to hear a reasonable account of the skills required to break into the stuff. And whether the protection at least does rub out the commenting stuff embedded in VFP code!

from the vfp wiki quoting Igor Korolyov:

Yes I can. All I have to have - 1 legal copy (so I can launch it on at least 1 computer). Then I can use Win32 debugger to attach to this process, set breakpoint to Read an API call in vfpXr.dll import table, so I can intercept all VFP runtime file reads - as NO ONE KNOWN VFP protector really modifies VFP runtime encoding or object code processing algorithms (ReFox Level II and above just change encoder/decoder tables and constants - not algorithm itself) - I will get pure VFP object code, the one I can feed to ReFox or other VFP decompiler. If object code was encoded with non-standard encoder/decoder tables (as in case of ReFox Level II branding) I will just need a simple decoder like Corso, or even my own hand made decoder (200 line prg file) - it will made plain object code suitable for ReFox processing.

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