sp_core/
hasher.rs

1// This file is part of Substrate.
2
3// Copyright (C) Parity Technologies (UK) Ltd.
4// SPDX-License-Identifier: Apache-2.0
5
6// Licensed under the Apache License, Version 2.0 (the "License");
7// you may not use this file except in compliance with the License.
8// You may obtain a copy of the License at
9//
10// 	http://www.apache.org/licenses/LICENSE-2.0
11//
12// Unless required by applicable law or agreed to in writing, software
13// distributed under the License is distributed on an "AS IS" BASIS,
14// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15// See the License for the specific language governing permissions and
16// limitations under the License.
17
18//! Substrate Blake2b Hasher implementation
19
20pub mod blake2 {
21	use crate::hash::H256;
22	use hash256_std_hasher::Hash256StdHasher;
23	use hash_db::Hasher;
24
25	/// Concrete implementation of Hasher using Blake2b 256-bit hashes
26	#[derive(Debug)]
27	pub struct Blake2Hasher;
28
29	impl Hasher for Blake2Hasher {
30		type Out = H256;
31		type StdHasher = Hash256StdHasher;
32		const LENGTH: usize = 32;
33
34		fn hash(x: &[u8]) -> Self::Out {
35			sp_crypto_hashing::blake2_256(x).into()
36		}
37	}
38}
39
40pub mod keccak {
41	use crate::hash::H256;
42	use hash256_std_hasher::Hash256StdHasher;
43	use hash_db::Hasher;
44
45	/// Concrete implementation of Hasher using Keccak 256-bit hashes
46	#[derive(Debug)]
47	pub struct KeccakHasher;
48
49	impl Hasher for KeccakHasher {
50		type Out = H256;
51		type StdHasher = Hash256StdHasher;
52		const LENGTH: usize = 32;
53
54		fn hash(x: &[u8]) -> Self::Out {
55			sp_crypto_hashing::keccak_256(x).into()
56		}
57	}
58}
sp_core/hasher.rs

sp_core/
hasher.rs
