How you inject codes?

Originally Posted by Hero

Hi
I myself want to work on AES-128!
But the problem is that you can't do it always,because of relative address of
S-Boxes and vaiables that used in that algorithm and rebuilding them is really awfull.
Are you sure you done all of this for AES?
AES has complicated implementation because of its references to S_Boxes...

I use delphi. The origin delphi source of AES is from http://www.secureblackbox.com, named elaes.pas. You can google it.

With the techniqe described above, I get the 128bit AES in asm.
Now the limit is length of the crypt key you input and crypt data must <= 16 byte.(due to my lazy)

You know, Cpu not know function, procedure, S_Boxes..., it just know dword, address. So S_Boxes is a relative address map of dword data for Cpu view and asm.

[shoooo]

the microsoft's tools maybe help you.

The position independent code is the general solution. Your code shouldn't contain any relocations and imported function calls, such as OS API. Organizing code in the single section and avoiding global variables resolves the problem with relocations. If you need to make a call to OS API function you should allocate a structure in the target process and fill it in with pointers to API required or patch your code with these addresses.

[Hero]

I know this.I always inject codes myself...
But my main reson was that is there any tool that for example can automatically
abstract an exported function from a dll and completely correct its relocations to
an brusted code or not?

sincerely yours

I dont think a tool exists publicly but TMGRipper does do a nice job handling local vars and global vars, last time I used it.

-Lunar