Compile time string XOR for visual studio 2010-2013.
Use the replacement: https://github.com/stevemk14ebr/CompileTime-String-Encryption
To setup:
1) Compile this project to .dll
2) Rename the compiled dll to a.dll
3) Navigate to Visual Studio Install Directory -> VC -> bin, locate c1xx.dll
4) Patch c1xx.dll to load a.dll
5) Place a.dll in the VC -> bin directory next to c1xx.dll
To use:
1) Open the project you want to have CT XOR
2) Place xor.h in your project
3) Build Project
Notes:
Can handle escaped quotes
Can handle multiple XOR statements per line
Uses Unicode almost entirely
This version XOR's in debug and in release mode
Encrypted Files are stored in project directory /Temp
Original Code and ideas 100% SEGnosis, i simply made a VS2013 compatible a.dll version with a few changes, c1xx.dll patch created by SEGnosis as well
Necessary directions to patch c1xx.dll and xor.h header can be found here:
Example of usage scenario:
You have code such as
#define SuperSecretKey "ImAKey"
if(input==SuperSecretKey)
printf("You are a valid user!");This would turn into
//The XOR macro is expanded at compile time by a.dll
#define SuperSecretKey XOR("ImAKey")
if(input==SuperSecretKey)
printf("You are a valid user!");Code-wise this is very simple, but in the decompiled binary your string would lose all xrefs (due to how this uses templates, ida isn't good at following thousands of unique instances of expanded function templates), and would appear similar to 'x33/x33/x33/x33' instead of "ImAKey"