mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
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71 lines
2.2 KiB
C++
71 lines
2.2 KiB
C++
/*
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* Copyright (c) Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include <vapours/common.hpp>
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#include <vapours/assert.hpp>
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#include <vapours/util.hpp>
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#include <vapours/crypto/impl/crypto_hash_function.hpp>
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#include <vapours/crypto/crypto_memory_clear.hpp>
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namespace ams::crypto {
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struct Sha3Context;
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}
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namespace ams::crypto::impl {
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template<size_t _HashSize>
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class Sha3Impl {
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public:
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static constexpr size_t InternalStateSize = 200;
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static constexpr size_t HashSize = _HashSize;
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static constexpr size_t BlockSize = InternalStateSize - 2 * HashSize;
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private:
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enum State {
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State_None,
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State_Initialized,
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State_Done,
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};
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private:
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u64 m_internal_state[InternalStateSize / sizeof(u64)];
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size_t m_buffered_bytes;
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State m_state;
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public:
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Sha3Impl() : m_state(State_None) { /* ... */ }
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~Sha3Impl() {
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ClearMemory(this, sizeof(*this));
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}
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void Initialize();
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void Update(const void *data, size_t size);
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void GetHash(void *dst, size_t size);
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void InitializeWithContext(const Sha3Context *context);
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void GetContext(Sha3Context *context) const;
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private:
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void ProcessBlock();
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void ProcessLastBlock();
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};
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static_assert(HashFunction<Sha3Impl<224 / BITSIZEOF(u8)>>);
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static_assert(HashFunction<Sha3Impl<256 / BITSIZEOF(u8)>>);
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static_assert(HashFunction<Sha3Impl<384 / BITSIZEOF(u8)>>);
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static_assert(HashFunction<Sha3Impl<512 / BITSIZEOF(u8)>>);
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}
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