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https://github.com/dronavallipranav/rust-obfuscator

Automatic Rust Obfuscator and Macro Library
https://github.com/dronavallipranav/rust-obfuscator

automatic compile-time control-flow encryption macros obfuscator renaming runtime rust source string

Last synced: 8 days ago
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Automatic Rust Obfuscator and Macro Library

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README 

        
# Rust-Obfuscator



`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](https://crates.io/crates/cryptify) is also provided.



## Currently Supported

1. string literal encryption

2. control-flow obfuscation

3. control-flow obfuscation (source code)

4. variable renaming (source code)



## Features



- **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

    ```rs

        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.



## Installation



Add `cryptify` to your `Cargo.toml` as a dependency:



```toml

[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 .

```



# Usage

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

```rs

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

```sh

./rust-obfuscator path/to/your_project 

```

- 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**



## Option Flags

- --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.



### Example usage with flag

```sh

rust-obfuscator path/to/your_project --no_flow 

```

(disables flow obfuscation)



# Input

-running the tool with no config

```rs

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 = env::args().collect();

    if args.len() < 2 {

        eprintln!("Usage: {} ", 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");

}



```

# Output

```rs

fn main() {

    cryptify::flow_stmt!();

    let b = cryptify::encrypt_string!("Hello World");

    println!("{}", b);

    let args: Vec = env::args().collect();

    if args.len() < 2 {

        eprintln!("Usage: {} ", 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");

}

```

## Expanded Output

```rs

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 = env::args().collect();

    if args.len() < 2 {

        {

            ::std::io::_eprint(format_args!("Usage: {0} \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"));

    };

}

```

# License

rust-obfuscator is licensed under the MIT License - see the [LICENSE](https://github.com/dronavallipranav/rust-obfuscator/blob/main/LICENSE) file for details.