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https://github.com/Atmosphere-NX/Atmosphere
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34 lines
1.4 KiB
C++
34 lines
1.4 KiB
C++
/*
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* Copyright (c) 2018-2019 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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#include <stratosphere.hpp>
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namespace ams::os::impl {
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void InitializeRandomImpl(util::TinyMT *mt) {
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/* Retrieve entropy from kernel. */
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u32 seed[4];
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static_assert(util::size(seed) == util::TinyMT::NumStateWords);
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/* Nintendo does not check the result of these invocations, but we will for safety. */
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/* Nintendo uses entropy values 0, 1 to seed the public TinyMT random, and values */
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/* 2, 3 to seed os::detail::RngManager's private TinyMT random. */
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R_ASSERT(svcGetInfo(reinterpret_cast<u64 *>(&seed[0]), InfoType_RandomEntropy, INVALID_HANDLE, 0));
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R_ASSERT(svcGetInfo(reinterpret_cast<u64 *>(&seed[2]), InfoType_RandomEntropy, INVALID_HANDLE, 1));
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mt->Initialize(seed, util::size(seed));
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}
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}
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