0BFUSC4T0R

Description

Simple ruby script to obfuscate C files.

It replaces compatible characters by digraphs/trigraphs

Digraphs

character	replacement
[	<:
]	:>
{	<%
}	%>
#	%:

Trigraphs

character	replacement
[	??(
]	??)
{	??<
}	??>
#	??=
\	??/
^	??'
~	??-

Usage

ruby obfuscator.rb < flag > < input file > < output file >

Flags:

• -d to use digraphs
• -t to use trigraphs

Warning: if you use trigraphs, you'll need to compile with -trigraphs

Exemples

input file:

#include <stdio.h>
#include <string.h>

int main(void)
{
    char str[100] = {0};

    strcpy(str, "Hello world!");
    puts(str);
    return 0;
}

Outputfiles:

• Digraph:

  %:include <stdio.h>
  %:include <string.h>
  
  int main(void)
  <%
      char str<:100:> = <%0%>;
  
      strcpy(str, "Hello world!");
      puts(str);
      return 0;
  %>

• Trigraphs:

  ??=include <stdio.h>
  ??=include <string.h>
  
  int main(void)
  ??<
      char str??(100??) = ??<0??>;
  
      strcpy(str, "Hello world!");
      puts(str);
      return 0;
  ??>