obfus.h is a macro-only library for compile-time obfuscating C applications, designed specifically for the Tiny C (tcc). It is tailored for Windows x86 and x64 platforms and supports almost all versions of the compiler.
- ๐ Function Call Obfuscation: Confuse function calls to make your code less readable to unauthorized eyes.
- ๐ก๏ธ Anti-Debugging Techniques: Built-in mechanisms to prevent code analysis during runtime.
- ๐ Control Flow Code Mutation: Turns code into spaghetti, making it difficult to parse conditions and loops.
- ๐ซ Anti-Decompilation Techniques: Makes many popular decompilers useless visually breaking their output.
Integrating obfus.h into your project is a simple process. Just include the following line in your code:
#include "obfus.h"
This will automatically obfuscate your code during compilation, ensuring protection and confidentiality of your intellectual property.
Available options for protection configuring:
// Additional options #define cflow_v2 1 // More powerful Control Flow obfuscation (slowly!) #define antidebug_v2 1 // Use better dynamic anti-debugging protection // Disabling default features #define no_cflow 1 // Don't use Control-Flow obfuscation #define no_antidebug 1 // Don't build in debugging protectionor use it with compiler args:
tcc "app.c" -w -D no_cflow -D antidebug_v2
-w
argument to suppress warnings. Otherwise, the console will display numerous intimidating logs that have no impact on the final result. There's no need to be alarmed by them.
// Let's obfuscate your code!
#include <stdio.h>
// #define no_cflow 1
// #define no_antidebug 1
#define antidebug_v2 1
#include "obfus.h"
void main() {
char *out = malloc(256);
strcpy(out, "Hello, world!");
if (out) {
printf(out);
} else {
printf("Error!");
}
}
The latest version of Tiny C (0.9.27
) is recommended for use. Unfortunately, some versions of the compiler do not support the functionality needed to completely obfuscation.