40 lines
1.3 KiB
Rust
40 lines
1.3 KiB
Rust
// Copyright 2015-2020 Parity Technologies (UK) Ltd.
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// This file is part of OpenEthereum.
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// OpenEthereum is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// OpenEthereum is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with OpenEthereum. If not, see <http://www.gnu.org/licenses/>.
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//! Hasher implementation for the Keccak-256 hash
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extern crate ethereum_types;
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extern crate hash_db;
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extern crate plain_hasher;
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extern crate tiny_keccak;
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use ethereum_types::H256;
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use hash_db::Hasher;
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use plain_hasher::PlainHasher;
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use tiny_keccak::Keccak;
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/// Concrete `Hasher` impl for the Keccak-256 hash
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#[derive(Default, Debug, Clone, PartialEq)]
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pub struct KeccakHasher;
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impl Hasher for KeccakHasher {
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type Out = H256;
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type StdHasher = PlainHasher;
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const LENGTH: usize = 32;
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fn hash(x: &[u8]) -> Self::Out {
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let mut out = [0; 32];
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Keccak::keccak256(x, &mut out);
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out.into()
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}
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}
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