mirror of
https://github.com/pezkuwichain/pezkuwi-subxt.git
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Bastian Köcher
54 lines
1.6 KiB
Rust
54 lines
1.6 KiB
Rust
// Copyright 2018-2019 Parity Technologies (UK) Ltd.
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// This file is part of Substrate.
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// Substrate 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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// Substrate 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 Substrate. If not, see <http://www.gnu.org/licenses/>.
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//! Substrate Blake2b Hasher implementation
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use hash_db::Hasher;
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use hash256_std_hasher::Hash256StdHasher;
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use crate::hash::H256;
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pub mod blake2 {
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use super::{Hasher, Hash256StdHasher, H256};
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#[cfg(feature = "std")]
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use crate::hashing::blake2_256;
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#[cfg(not(feature = "std"))]
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extern "C" {
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fn ext_blake2_256(data: *const u8, len: u32, out: *mut u8);
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}
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#[cfg(not(feature = "std"))]
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fn blake2_256(data: &[u8]) -> [u8; 32] {
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let mut result: [u8; 32] = Default::default();
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unsafe {
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ext_blake2_256(data.as_ptr(), data.len() as u32, result.as_mut_ptr());
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}
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result
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}
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/// Concrete implementation of Hasher using Blake2b 256-bit hashes
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#[derive(Debug)]
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pub struct Blake2Hasher;
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impl Hasher for Blake2Hasher {
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type Out = H256;
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type StdHasher = Hash256StdHasher;
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const LENGTH: usize = 32;
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fn hash(x: &[u8]) -> Self::Out {
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blake2_256(x).into()
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}
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}
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}
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