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obfus.h
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 all versions of the compiler.
- 🔍 Function Call Obfuscation: Confuse function calls to make your code less readable to unauthorized eyes.
- 🛡️ Anti-Debugging Techniques: Built-in mechanisms to prevent code analysis during runtime.
- 🔄 Control Flow Code Mutation: Turns code into spaghetti, making it difficult to parse conditions and loops.
- 🚫 Complex Anti-Decompilation Techniques: Makes many popular decompilers useless visually breaking their output.
Usage
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:
#define no_cflow 1 // Don't use Control-Flow obfuscation #define no_antidebug 1 // Don't build in debugging protection #define hide_antidebug 1 // Use dynamic calls to hide antidebugger
or use it with compiler args:
tcc "app.c" -w -D no_cflow -D no_antidebug
⚠️ When compiling an application with obfuscation, use the -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.
Example
// Let's obfuscate your code!
#include <stdio.h>
// #define no_cflow 1
// #define no_antidebug 1
#include "obfus.h"
void main() {
char *out = malloc(256);
strcpy(out, "Hello, world!");
if (out) {
printf(out);
} else {
printf("Error!");
}
}
Version
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.