Simple utility that encrypt with AES and hash with MD5 each function declaration and function call in the specified source file. The idea is too prevent symbol table reverse engineering by changing the function name, what will change the signature of all the functions.
We have the file target.c with the following content:
#include <stdio.h>
void foo() {
printf("foo()\n");
}
void bar() {
printf("bar()\n");
}
int main() {
bar();
foo();
foo();
return 0;
}Run this simple test:
python3 test.py --file target.c --password passwordExample of output:
#include <stdio.h>
void fb9a40b7b7cc8877f4fbeec894f3b99a() {
printf("fb9a40b7b7cc8877f4fbeec894f3b99a()\n");
}
void 30bea02020d22fade1eb20442399c9bb() {
printf("30bea02020d22fade1eb20442399c9bb()\n");
}
int main() {
30bea02020d22fade1eb20442399c9bb();
fb9a40b7b7cc8877f4fbeec894f3b99a();
fb9a40b7b7cc8877f4fbeec894f3b99a();
return 0;
}The scrambled function names will change at each run.
pycparser is a parser for the C langage.
sudo apt-get install python3-pip && pip3 install pycparser --user