Great for beginners

keygenme.zip

Edited October 17, 20159 yr by chickenbutt

kao.was.here@gmail.com

bd6d4e7ea6b073270d7138d0ea0b00e3

Making an actual keygen is impossible in certain programming languages (like C#), so I'm not going to bother.

Reason:

004033CF   56               PUSH ESI004033D0   E8 4F770000      CALL <JMP.&MSVCRT.atof>004033D5   D95C24 14        FSTP DWORD PTR SS:[ESP+14]004033D9   D94424 14        FLD DWORD PTR SS:[ESP+14]

This part of code converts string like "6263206535" to 32bit floating value "6263206535.0000000000". Then stores it in a 32bit integer losing precision, and then loads it back into float again - but this floating value is already rounded: "6263206400.0000000000". .NET uses a slightly different approach, so the rounded values do not match.

E-mail:

giv@reversing.ro

 

Serial:

 

44e8c60b90642ec06b752ebd14692c6e

xxx@xmail.xxx

2d588db4a478b105ee409af77e69b66c

 

Attached self keygen. Fill in a name and press activate.

 

selfkeygen.rar

If you want that way just with a little mods can be called a "keygen".

 

 

Keygen.rar

Inlining to put it in UI is a neat solution.

 

The whole thing is based on equation x-((9.4837x)/100.0) even though this is just part of the key algo. It's the hardest part because of precision which is hundred thousandths before the last stage.

Edited October 20, 20159 yr by chickenbutt