. NET encryption hack--Reverse thinking

Today inadvertently saw the Wuhuacong (Wu Huacong) column, the interface is still very cool to write a feeling, so in Guangzhou Echidi official website to download one to try-customer relationship management system. Here are the results:

00. Overall GRASP

There is a logon window (why not login), a MainForm main window, a REGDLG registration window, etc. (portal is the meaning of the portal).

01.Main is the purpose

My purpose is to run the main window and I'll analyze where the mainform is used: The Smethod_0 and smethod_1 of the Portal entry class.

02. Don't forget the main function

Combined with the main function in the portal, we can determine which of the functions to be handled is "smethod_0" or "smethod_1" or "Smethod_0 and Smethod_1", which is the only test.

03. First attempt

Two of the conditions in the smethod_0 are equal to the inverse, the following is the result:

After running, the card in the Start screen, view the MainForm form of the constructor, delete the two methods of the call, OK, you can enter the main program.

Of course, no registration, there may be other problems, but also not scrutiny down. Here just to illustrate a point, the importance of anti-push.

. NET encryption hack--Reverse thinking