Trait HashAlgorithm 

pub trait HashAlgorithm:
    Clone
    + Send
    + Sync
    + 'static {
    const OUTPUT_SIZE: usize;
    const ALGORITHM_NAME: &'static str;

    // Required method
    fn hash(data: &[u8]) -> Vec<u8> ;

    // Provided methods
    fn hash_concat(data1: &[u8], data2: &[u8]) -> Vec<u8>  { ... }
    fn expand_seed(seed: &[u8]) -> (Vec<u8>, Vec<u8>) { ... }
}

Available on crate feature hash only.

Trait for hash algorithms used in KES schemes

This trait provides a simple interface for hash algorithms used in Key Evolving Signature (KES) constructions, particularly for the binary sum composition where verification keys are hashed.

Required Associated Constants

const OUTPUT_SIZE: usize

Output size in bytes

const ALGORITHM_NAME: &'static str

Algorithm name for debugging

Required Methods

fn hash(data: &[u8]) -> Vec<u8>

Hash the input data

Example

use cardano_crypto::hash::{Blake2b256, HashAlgorithm};

let data = b"input data";
let hash = Blake2b256::hash(data);
assert_eq!(hash.len(), Blake2b256::OUTPUT_SIZE);

Provided Methods

fn hash_concat(data1: &[u8], data2: &[u8]) -> Vec<u8>

Hash two inputs concatenated together

Example

use cardano_crypto::hash::{Blake2b256, HashAlgorithm};

let hash = Blake2b256::hash_concat(b"hello", b"world");
assert_eq!(hash.len(), 32);

fn expand_seed(seed: &[u8]) -> (Vec<u8>, Vec<u8>)

Expand a seed into two new seeds using domain separation

Example

use cardano_crypto::hash::{Blake2b256, HashAlgorithm};

let seed = b"original seed";
let (seed0, seed1) = Blake2b256::expand_seed(seed);
assert_eq!(seed0.len(), 32);
assert_eq!(seed1.len(), 32);
assert_ne!(seed0, seed1);

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors

impl HashAlgorithm for Blake2b224

const OUTPUT_SIZE: usize = 28

const ALGORITHM_NAME: &'static str = "blake2b_224"

impl HashAlgorithm for Blake2b256

const OUTPUT_SIZE: usize = 32

const ALGORITHM_NAME: &'static str = "blake2b_256"

impl HashAlgorithm for Blake2b512

const OUTPUT_SIZE: usize = 64

const ALGORITHM_NAME: &'static str = "blake2b_512"