/* * 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> namespace ams::crypto { namespace { bool g_initialized; os::Mutex g_lock(false); void InitializeCsrng() { AMS_ASSERT(!g_initialized); sm::DoWithSession([&]() { R_ABORT_UNLESS(::csrngInitialize()); }); } } void GenerateCryptographicallyRandomBytes(void *dst, size_t dst_size) { { std::scoped_lock lk(g_lock); if (AMS_UNLIKELY(!g_initialized)) { InitializeCsrng(); g_initialized = true; } } R_ABORT_UNLESS(csrngGetRandomBytes(dst, dst_size)); } }