mirror of
https://github.com/pezkuwichain/pezkuwi-subxt.git
synced 2026-04-26 11:07:56 +00:00
Wei Tang
54 lines
1.5 KiB
Rust
54 lines
1.5 KiB
Rust
// Copyright 2018 Parity Technologies (UK) Ltd.
|
|
// This file is part of Substrate.
|
|
|
|
// Substrate is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
|
|
// Substrate is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU General Public License for more details.
|
|
|
|
// You should have received a copy of the GNU General Public License
|
|
// along with Substrate. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
//! Polkadot Blake2b Hasher implementation
|
|
|
|
use hashdb::Hasher;
|
|
use plain_hasher::PlainHasher;
|
|
use hash::H256;
|
|
|
|
pub mod blake2 {
|
|
use super::{Hasher, PlainHasher, H256};
|
|
#[cfg(feature = "std")]
|
|
use hashing::blake2_256;
|
|
|
|
#[cfg(not(feature = "std"))]
|
|
extern "C" {
|
|
fn ext_blake2_256(data: *const u8, len: u32, out: *mut u8);
|
|
}
|
|
#[cfg(not(feature = "std"))]
|
|
fn blake2_256(data: &[u8]) -> [u8; 32] {
|
|
let mut result: [u8; 32] = Default::default();
|
|
unsafe {
|
|
ext_blake2_256(data.as_ptr(), data.len() as u32, result.as_mut_ptr());
|
|
}
|
|
result
|
|
}
|
|
|
|
/// Concrete implementation of Hasher using Blake2b 256-bit hashes
|
|
#[derive(Debug)]
|
|
pub struct Blake2Hasher;
|
|
|
|
impl Hasher for Blake2Hasher {
|
|
type Out = H256;
|
|
type StdHasher = PlainHasher;
|
|
const LENGTH: usize = 32;
|
|
fn hash(x: &[u8]) -> Self::Out {
|
|
blake2_256(x).into()
|
|
}
|
|
}
|
|
}
|