mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
synced 2024-12-25 19:56:03 +00:00
63 lines
2.3 KiB
C++
63 lines
2.3 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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#include <stratosphere.hpp>
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#include "updater_files.hpp"
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namespace ams::updater {
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Result ReadFile(size_t *out_size, void *dst, size_t dst_size, const char *path) {
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/* Open the file. */
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fs::FileHandle file;
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R_TRY_CATCH(fs::OpenFile(std::addressof(file), path, fs::OpenMode_Read)) {
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R_CONVERT(fs::ResultPathNotFound, updater::ResultInvalidBootImagePackage())
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} R_END_TRY_CATCH;
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ON_SCOPE_EXIT { fs::CloseFile(file); };
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std::memset(dst, 0, dst_size);
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return fs::ReadFile(out_size, file, 0, dst, dst_size, fs::ReadOption());
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}
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Result GetFileHash(size_t *out_size, void *dst_hash, const char *path, void *work_buffer, size_t work_buffer_size) {
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/* Open the file. */
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fs::FileHandle file;
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R_TRY_CATCH(fs::OpenFile(std::addressof(file), path, fs::OpenMode_Read)) {
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R_CONVERT(fs::ResultPathNotFound, updater::ResultInvalidBootImagePackage())
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} R_END_TRY_CATCH;
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ON_SCOPE_EXIT { fs::CloseFile(file); };
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/* Read in chunks, hashing as we go. */
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crypto::Sha256Generator generator;
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generator.Initialize();
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size_t total_size = 0;
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while (true) {
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size_t size;
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R_TRY(fs::ReadFile(std::addressof(size), file, total_size, work_buffer, work_buffer_size, fs::ReadOption()));
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generator.Update(work_buffer, size);
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total_size += size;
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if (size != work_buffer_size) {
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break;
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}
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}
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generator.GetHash(dst_hash, crypto::Sha256Generator::HashSize);
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*out_size = total_size;
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return ResultSuccess();
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}
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}
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