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os: add rngmanager

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This commit is contained in:
Michael Scire 2020-03-16 13:08:20 -07:00
parent daa0deb1bf
commit 7dd4e76c1d
6 changed files with 132 additions and 1 deletions
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3
libraries/libstratosphere/source/os/impl/os_resource_manager.hpp
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@ -15,18 +15,21 @@
*/
#pragma once
#include <stratosphere.hpp>
#include "os_rng_manager_impl.hpp"
#include "os_tick_manager_impl.hpp"
namespace ams::os::impl {
class OsResourceManager {
private:
RngManager rng_manager{};
/* TODO */
TickManager tick_manager{};
/* TODO */
public:
constexpr OsResourceManager() = default;
constexpr ALWAYS_INLINE RngManager &GetRngManager() { return this->rng_manager; }
constexpr ALWAYS_INLINE TickManager &GetTickManager() { return this->tick_manager; }
};

25
libraries/libstratosphere/source/os/impl/os_rng_manager.hpp Normal file
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@ -0,0 +1,25 @@
/*
* Copyright (c) 2018-2020 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 <stratosphere.hpp>
namespace ams::os::impl {
ALWAYS_INLINE RngManager &GetRngManager() {
return GetResourceManager().GetRngManager();
}
}

31
libraries/libstratosphere/source/os/impl/os_rng_manager_impl.cpp Normal file
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@ -0,0 +1,31 @@
/*
* Copyright (c) 2018-2020 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/>.
*/
#include <stratosphere.hpp>
#include "os_rng_manager_impl.hpp"
namespace ams::os::impl {
u64 RngManager::GenerateRandomU64() {
std::scoped_lock lk(this->lock);
if (AMS_UNLIKELY(!this->initialized)) {
this->Initialize();
}
return this->mt.GenerateRandomU64();
}
}

34
libraries/libstratosphere/source/os/impl/os_rng_manager_impl.hpp Normal file
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@ -0,0 +1,34 @@
/*
* Copyright (c) 2018-2020 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 <stratosphere.hpp>
namespace ams::os::impl {
class RngManager {
private:
util::TinyMT mt;
os::Mutex lock;
bool initialized;
private:
void Initialize();
public:
constexpr RngManager() : mt(), lock(), initialized() { /* ... */ }
public:
u64 GenerateRandomU64();
};
}

38
libraries/libstratosphere/source/os/impl/os_rng_manager_impl.os.horizon.cpp Normal file
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@ -0,0 +1,38 @@
/*
* Copyright (c) 2018-2020 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/>.
*/
#include <stratosphere.hpp>
#include "os_rng_manager_impl.hpp"
namespace ams::os::impl {
void RngManager::Initialize() {
/* Retrieve entropy from kernel. */
u32 seed[4];
static_assert(util::size(seed) == util::TinyMT::NumStateWords);
/* Nintendo does not check the result of these invocations, but we will for safety. */
/* Nintendo uses entropy values 0, 1 to seed the public TinyMT random, and values */
/* 2, 3 to seed os::detail::RngManager's private TinyMT random. */
R_ABORT_UNLESS(svcGetInfo(reinterpret_cast<u64 *>(&seed[0]), InfoType_RandomEntropy, INVALID_HANDLE, 2));
R_ABORT_UNLESS(svcGetInfo(reinterpret_cast<u64 *>(&seed[2]), InfoType_RandomEntropy, INVALID_HANDLE, 3));
this->mt.Initialize(seed, util::size(seed));
/* Note that we've initialized. */
this->initialized = true;
}
}

2
libraries/libstratosphere/source/os/os_random.cpp
View file

@ -42,7 +42,7 @@ namespace ams::os {
void GenerateRandomBytes(void *dst, size_t size) {
std::scoped_lock lk(g_random_mutex);
if (!g_initialized_random) {
if (AMS_UNLIKELY(!g_initialized_random)) {
impl::InitializeRandomImpl(&g_random);
g_initialized_random = true;
}