#ps2 #homebrew #codebreaker #gamehacking

no-std codebreaker

Decrypt & encrypt any cheat code for CodeBreaker PS2

12 releases

0.2.4 Sep 12, 2021
0.2.3 Apr 7, 2021
0.2.2 Jul 3, 2020
0.2.1 Jun 12, 2020
0.1.6 May 26, 2020

#24 in Games

48 downloads per month
Used in 2 crates




Latest version Documentation CI

A Rust library to decrypt & encrypt any cheat code for CodeBreaker PS2.

Originally reverse-engineered from MIPS R5900 assembly and converted to C in 2006. Now ported to Rust for fun and profit.

For more information, check out my article on 7 Things I Learned From Porting a C Crypto Library to Rust.


Add the crate as a dependency to your Cargo.toml:

codebreaker = "0.2"

Now you can start decrypting some codes:

use codebreaker::Codebreaker;

let input: Vec<(u32, u32)> = vec![
    (0x2043AFCC, 0x2411FFFF),
    (0x2A973DBD, 0x00000000),
    (0xB4336FA9, 0x4DFEFB79),
    (0x973E0B2A, 0xA7D4AF10),
let output: Vec<(u32, u32)> = vec![
    (0x2043AFCC, 0x2411FFFF),
    (0x201F6024, 0x00000000),
    (0xBEEFC0DE, 0x00000000),
    (0x2096F5B8, 0x000000BE),

let mut cb = Codebreaker::new();
for (i, code) in input.iter().enumerate() {
    assert_eq!(cb.auto_decrypt_code(code.0, code.1), output[i]);

Read the full documentation for more examples.

no_std support

The codebreaker crate has a Cargo feature named "std" that is enabled by default. In order to use the crate on embedded systems, this feature needs to be disabled:

codebreaker = { version = "0.2", default-features = false }


Copyright (c) 2020 Mathias Lafeldt

Licensed under the Apache License, Version 2.0 or the MIT license, at your option.


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