mirror of
https://github.com/Atmosphere-NX/Atmosphere
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102 lines
3.6 KiB
C++
102 lines
3.6 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_sha256_impl.hpp>
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#include <vapours/crypto/impl/crypto_sha256_impl_constexpr.hpp>
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namespace ams::crypto {
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struct Sha256Context {
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u32 intermediate_hash[impl::Sha256Impl::HashSize / sizeof(u32)];
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u64 bits_consumed;
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};
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class Sha256Generator {
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NON_COPYABLE(Sha256Generator);
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NON_MOVEABLE(Sha256Generator);
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private:
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using Impl = impl::Sha256Impl;
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public:
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static constexpr size_t HashSize = Impl::HashSize;
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static constexpr size_t BlockSize = Impl::BlockSize;
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static constexpr inline u8 Asn1Identifier[] = {
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0x30, 0x31, /* Sequence, size 0x31 */
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0x30, 0x0D, /* Sequence, size 0x0D */
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0x06, 0x09, /* Object Identifier */
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0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x01, /* SHA-256 */
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0x05, 0x00, /* Null */
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0x04, 0x20, /* Octet string, size 0x20 */
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};
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static constexpr size_t Asn1IdentifierSize = util::size(Asn1Identifier);
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private:
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Impl m_impl{};
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public:
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Sha256Generator() = default;
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void Initialize() {
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m_impl.Initialize();
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}
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void Update(const void *data, size_t size) {
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m_impl.Update(data, size);
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}
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void GetHash(void *dst, size_t size) {
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m_impl.GetHash(dst, size);
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}
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void InitializeWithContext(const Sha256Context *context) {
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m_impl.InitializeWithContext(context);
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}
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size_t GetContext(Sha256Context *context) const {
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return m_impl.GetContext(context);
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}
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size_t GetBufferedDataSize() const {
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return m_impl.GetBufferedDataSize();
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}
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void GetBufferedData(void *dst, size_t dst_size) const {
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return m_impl.GetBufferedData(dst, dst_size);
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}
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};
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void GenerateSha256(void *dst, size_t dst_size, const void *src, size_t src_size);
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ALWAYS_INLINE void GenerateSha256Hash(void *dst, size_t dst_size, const void *src, size_t src_size) {
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return GenerateSha256(dst, dst_size, src, src_size);
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}
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template<typename T, typename = typename std::enable_if<std::same_as<T, u8> || std::same_as<T, s8> || std::same_as<T, char> || std::same_as<T, unsigned char>>::type>
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constexpr ALWAYS_INLINE void GenerateSha256(u8 *dst, size_t dst_size, const T *src, size_t src_size) {
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if (std::is_constant_evaluated()) {
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impl::Sha256CompileTimeImpl sha;
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sha.Initialize();
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sha.Update(src, src_size);
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sha.GetHash(dst, dst_size);
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} else {
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return GenerateSha256(static_cast<void *>(dst), dst_size, static_cast<const void *>(src), src_size);
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}
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}
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}
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