Real Understanding Of Serial Generation

[redbull]

Good question...

I always try to understand the code that makes up the serial routine.. IF i understand it properly then I jsut write a quick keygen.

However sometimes the programmer who did the app you are cracking goes crazy and tries to make the routine as complex to understand as possible.

Normally you find that the serial routine is a CALL with about two or three dependant CALLs

For Example

GetSerial() relies on gets() and strncpy() and atoi()

So I rip all the procs out of the file then paste the asm into my high level language, wrapper it with a procedure to setup the stack properly and just
call the bugger.

Sometimes cracking the fucker is much easier than keygenning (example is WINRAR), but I do prefer generating valid keys becuase modifying the exe is risky.

my 2 cents