Crate feistel

Generic implementation of a Feistel Cipher.

Warning: this crate for now values ease of use and genericity over having perfect timing-attack-resistent implementations.

let network = key
    .chunks_exact(4)
    .map(|chunk| {
        move |half: &XorArray<u8, ConstArrayLength<32>>| {
            let mut hasher = Sha256::new();
            hasher.update(half);
            hasher.update(chunk);
            let value: [u8; 32] = hasher.finalize().into();
            XorArray(value.into())
        }
    })
    .feistel_symmetric();
let original = [0; 64].into();
let encrypted = network.clone().array_encrypt(original);
assert_ne!(original, encrypted);
let decrypted = network.clone().array_decrypt(encrypted);
assert_eq!(original, decrypted);

Structs

Array

ArrayNetwork wrapper around an IntoIterator.

Symmetric

SymmetricNetwork wrapper around an IntoIterator.

XorArray

Array that implements BitXor.

Traits

ArrayExt

Extension trait for creating ArrayNetworks.

ArrayNetwork

Network dealing with GenericArrays.

Network

Feistel network.

Round

Hash function for a specific round. Usually depends on a key.

SymmetricExt

Extension trait for creating SymmetricNetworks.

SymmetricNetwork

Network with Network::L equal to Network::R and Network::forward equivalent to Network::backward.