Fractus

Fractus is a cryptographic attack library written in rust. It is also available through python

Run

Rust

cargo add fractus

use fractus::sha2_256;

let m = b"abc";
let h = sha2_256::compute(&m);
let e = b"cde";
let mut c = m.to_vec();
c.extend(sha2_256::padding(m.len()));
c.extend(e);
let e = sha2_256::extend(&h, m.len(), e);
assert_eq!(e, sha2_256::compute(c));

Python

pip install fractus

from fractus import sha2_256

m = b'secret'+b'abc'
h = sha2_256.compute(m)
e = b'test'
assert sha2_256.extend(h, len(m), e) == sha2_256.compute(m + sha2_256.padding(len(m)) + e)

Develop

Rust

cargo test

Python

in a python virtual environment:

maturin develop --features python

pip install .

Publish

docker run --rm -it --entrypoint bash -v $(pwd):/io ghcr.io/pyo3/maturin
mkdir /fractus
cp -r /io/* /fractus
cd /fractus
maturin publish --features python -u __token__

Features

Length Extension Attack

• MD4
• MD5
• SHA0
• SHA1
• SHA2_256
• SHA2_512
• Ripemd128
• Ripemd160
• Ripemd256
• Ripemd320
• Whirlpool