openethereum/src/sha3.rs

37 lines
889 B
Rust

use std::mem::uninitialized;
use tiny_keccak::Keccak;
use bytes::BytesConvertable;
use hash::{FixedHash, H256};
pub trait Hashable {
fn sha3(&self) -> H256;
fn sha3_into(&self, dest: &mut [u8]);
}
impl<T> Hashable for T where T: BytesConvertable {
fn sha3(&self) -> H256 {
unsafe {
let mut keccak = Keccak::new_keccak256();
keccak.update(self.bytes());
let mut ret: H256 = uninitialized();
keccak.finalize(ret.mut_bytes());
ret
}
}
fn sha3_into(&self, dest: &mut [u8]) {
keccak_256(self.bytes(), dest);
}
}
#[test]
fn sha3_empty() {
use std::str::FromStr;
assert_eq!([0u8; 0].sha3(), H256::from_str("c5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470").unwrap());
}
#[test]
fn sha3_as() {
use std::str::FromStr;
assert_eq!([0x41u8; 32].sha3(), H256::from_str("59cad5948673622c1d64e2322488bf01619f7ff45789741b15a9f782ce9290a8").unwrap());
}