rust-obfuscator is a set of tools designed to automatically obfuscate Rust source code by inserting procedural macros or by (optionally) providing the obfuscation in the source code directly. For more fine-grained obfuscation a procedural macro library cryptify is also provided.
- string literal encryption
- control-flow obfuscation
- control-flow obfuscation (source code)
- variable renaming (source code)
- String Encryption: Automatically encrypts string literals assigned to local variables at compile time.
- Can also be used for formatted strings, but currently requires manual placement
println!("{}", cryptify::encrypt_string!("hello!"));
- Control Flow Obfuscation: Introduces compile-dummy dummy loops and random variables.
- Customizable Obfuscation: Offers flexibility to enable or disable specific obfuscation features based on your requirements.
- Variable Renaming: Obfuscation of the source code directly, if you'd like to ship the code or just want to make your code look worse.
Add cryptify to your Cargo.toml as a dependency:
[dependencies]
cryptify = "3.1.1"To install rust-obfuscator, clone the repository and build the tool using Cargo from the root:
cargo build --release --bin rust-obfuscator
The binary can then be found under /target/release, you can copy it to the root of the project like such
cp ./target/release/rust-obfuscator .
Set the CRYPTIFY_KEY environment variable for custom encryption otherwise it defaults to defined fixed key
- Add to source code you'd like to modify
use cryptify;The binary can be used on either a file or a directory. If provided with a directory it will only modify rust source files within that directory not any subdirectories
./rust-obfuscator path/to/your_project <Options>- All Obfuscated code will be under the obfuscated_code directory that is created from the directory the tool was run.
- Recommended to use a Rust Formatter with the obfuscated code as syn naturally modifies the structure and it will be written to the file as one line
- --no_string: Disables string obfuscation.
- --no_flow: Disables control flow obfuscation.
- --disable_macro: Uses direct source manipulation for flow obfuscation instead of procedural macros.
- --var: Enables variable renaming source code obfuscation.
rust-obfuscator path/to/your_project --no_flow (disables flow obfuscation)
-running the tool with no config
use cryptify;
mod word_counter;
use std::env;
use std::fs;
use word_counter::count_words;
fn main() {
let b = "Hello World";
println!("{}", b);
let args: Vec<String> = env::args().collect();
if args.len() < 2 {
eprintln!("Usage: {} <filename>", args[0]);
return;
}
let filename = &args[1];
let content = fs::read_to_string(filename).expect("Could not read file");
let word_counts = count_words(&content);
for (word, count) in word_counts.iter() {
println!("{}: {}", word, count);
}
}
fn dummy() {
let a = 1;
let b = 2;
let c = a + b;
println!("{}", c);
}
fn calc_sum(a: i32, b: i32) -> i32 {
cryptify::flow_stmt!();
let c = a + b;
c
}
fn helloooo(){
println!("hi");
}fn main() {
cryptify::flow_stmt!();
let b = cryptify::encrypt_string!("Hello World");
println!("{}", b);
let args: Vec<String> = env::args().collect();
if args.len() < 2 {
eprintln!("Usage: {} <filename>", args[0]);
return;
}
let filename = &args[1];
let content = fs::read_to_string(filename).expect("Could not read file");
let word_counts = count_words(&content);
for (word, count) in word_counts.iter() {
println!("{}: {}", word, count);
}
}
fn dummy() {
cryptify::flow_stmt!();
let a = 1;
let b = 2;
let c = a + b;
println!("{}", c);
}
fn calc_sum(a: i32, b: i32) -> i32 {
cryptify::flow_stmt!();
let c = a + b;
c
}
fn helloooo() {
println!("hi");
}fn main() {
{
let _is_dummy_145 = true;
let _dummy_upper_bound = 100;
let _random_dummy_var = 1;
let mut _dummy_counter = 6i32;
let _dummy_increment = 2i32;
loop {
if _dummy_counter > _dummy_upper_bound {
break;
}
unsafe {
std::ptr::write_volatile(
&mut _dummy_counter,
_dummy_counter + _dummy_increment,
);
}
}
};
let b = cryptify::decrypt_string("0\u{b}\r\u{1f}\tFd\u{18}\u{11}\t\0");
{
::std::io::_print(format_args!("{0}\n", b));
};
let args: Vec<String> = env::args().collect();
if args.len() < 2 {
{
::std::io::_eprint(format_args!("Usage: {0} <filename>\n", args[0]));
};
return;
}
let filename = &args[1];
let content = fs::read_to_string(filename).expect("Could not read file");
let word_counts = count_words(&content);
for (word, count) in word_counts.iter() {
{
::std::io::_print(format_args!("{0}: {1}\n", word, count));
};
}
}
fn dummy() {
{
let _is_dummy_145 = true;
let mut _dummy_counter = 4i32;
let _dummy_upper_bound = 100;
let _dummy_increment = 3i32;
loop {
if _dummy_counter > _dummy_upper_bound {
break;
}
unsafe {
std::ptr::write_volatile(
&mut _dummy_counter,
_dummy_counter + _dummy_increment,
);
}
}
};
let a = 1;
let b = 2;
let c = a + b;
{
::std::io::_print(format_args!("{0}\n", c));
};
}
fn calc_sum(a: i32, b: i32) -> i32 {
{
let _is_dummy_145 = true;
let mut _dummy_counter = 8i32;
let _dummy_increment = 3i32;
let _extra_dummy_var = 4i32;
let _dummy_upper_bound = 100;
loop {
if _dummy_counter > _dummy_upper_bound {
break;
}
unsafe {
std::ptr::write_volatile(
&mut _dummy_counter,
_dummy_counter + _dummy_increment,
);
}
}
};
let c = a + b;
c
}
fn helloooo() {
{
::std::io::_print(format_args!("hi\n"));
};
}rust-obfuscator is licensed under the MIT License - see the LICENSE file for details.