Atmosphere-libs/libstratosphere/include/stratosphere/fssystem/fssystem_sha_hash_generator.hpp

108 lines
4.3 KiB
C++

/*
* Copyright (c) Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include <vapours.hpp>
#include <stratosphere/fssystem/fssystem_i_hash_256_generator.hpp>
namespace ams::fssystem {
/* ACCURATE_TO_VERSION: 14.3.0.0 */
namespace impl {
template<typename Traits>
class ShaHashGenerator final : public ::ams::fssystem::IHash256Generator, public ::ams::fs::impl::Newable {
static_assert(Traits::Generator::HashSize == IHash256Generator::HashSize);
NON_COPYABLE(ShaHashGenerator);
NON_MOVEABLE(ShaHashGenerator);
private:
Traits::Generator m_generator;
public:
ShaHashGenerator() = default;
protected:
virtual void DoInitialize() override {
m_generator.Initialize();
}
virtual void DoUpdate(const void *data, size_t size) override {
m_generator.Update(data, size);
}
virtual void DoGetHash(void *dst, size_t dst_size) override {
m_generator.GetHash(dst, dst_size);
}
};
template<typename Traits>
class ShaHashGeneratorFactory final : public IHash256GeneratorFactory, public ::ams::fs::impl::Newable {
static_assert(Traits::Generator::HashSize == IHash256Generator::HashSize);
NON_COPYABLE(ShaHashGeneratorFactory);
NON_MOVEABLE(ShaHashGeneratorFactory);
public:
constexpr ShaHashGeneratorFactory() = default;
protected:
virtual std::unique_ptr<IHash256Generator> DoCreate() override {
return std::unique_ptr<IHash256Generator>(new ShaHashGenerator<Traits>());
}
virtual void DoGenerateHash(void *dst, size_t dst_size, const void *src, size_t src_size) override {
Traits::Generate(dst, dst_size, src, src_size);
}
};
struct Sha256Traits {
using Generator = crypto::Sha256Generator;
static ALWAYS_INLINE void Generate(void *dst, size_t dst_size, const void *src, size_t src_size) {
return crypto::GenerateSha256(dst, dst_size, src, src_size);
}
};
struct Sha3256Traits {
using Generator = crypto::Sha3256Generator;
static ALWAYS_INLINE void Generate(void *dst, size_t dst_size, const void *src, size_t src_size) {
return crypto::GenerateSha3256(dst, dst_size, src, src_size);
}
};
}
using Sha256HashGenerator = impl::ShaHashGenerator<impl::Sha256Traits>;
using Sha256HashGeneratorFactory = impl::ShaHashGeneratorFactory<impl::Sha256Traits>;
using Sha3256HashGenerator = impl::ShaHashGenerator<impl::Sha3256Traits>;
using Sha3256HashGeneratorFactory = impl::ShaHashGeneratorFactory<impl::Sha3256Traits>;
class ShaHashGeneratorFactorySelector final : public IHash256GeneratorFactorySelector, public ::ams::fs::impl::Newable {
NON_COPYABLE(ShaHashGeneratorFactorySelector);
NON_MOVEABLE(ShaHashGeneratorFactorySelector);
private:
Sha256HashGeneratorFactory m_sha256_factory;
Sha3256HashGeneratorFactory m_sha3_256_factory;
public:
constexpr ShaHashGeneratorFactorySelector() = default;
protected:
virtual IHash256GeneratorFactory *DoGetFactory(HashAlgorithmType alg) override {
switch (alg) {
case HashAlgorithmType_Sha2: return std::addressof(m_sha256_factory);
case HashAlgorithmType_Sha3: return std::addressof(m_sha3_256_factory);
AMS_UNREACHABLE_DEFAULT_CASE();
}
}
};
}