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https://github.com/Atmosphere-NX/Atmosphere.git
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95 lines
3.1 KiB
C++
95 lines
3.1 KiB
C++
/*
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* Copyright (c) 2018-2020 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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#pragma once
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#include <vapours.hpp>
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namespace ams::crypto::impl {
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template<typename Cipher, typename Self>
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void UpdateImpl(Self *self, const void *src, size_t src_size) {
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const size_t BlockSize = self->GetBlockSize();
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const u8 *src_u8 = static_cast<const u8 *>(src);
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size_t remaining = src_size;
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if (const size_t buffered = self->GetBufferedDataSize(); buffered > 0) {
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const size_t partial = std::min(BlockSize - buffered, remaining);
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self->ProcessPartialData(src_u8, partial);
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src_u8 += partial;
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remaining -= partial;
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}
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if (remaining >= BlockSize) {
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const size_t num_blocks = remaining / BlockSize;
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self->template ProcessBlocks<Cipher>(src_u8, num_blocks);
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const size_t processed = num_blocks * BlockSize;
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src_u8 += processed;
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remaining -= processed;
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}
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if (remaining > 0) {
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self->ProcessRemainingData(src_u8, remaining);
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}
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}
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template<typename Cipher, typename Self>
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size_t UpdateImpl(Self *self, void *dst, size_t dst_size, const void *src, size_t src_size) {
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const size_t BlockSize = self->GetBlockSize();
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const u8 *src_u8 = static_cast<const u8 *>(src);
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u8 *dst_u8 = static_cast<u8 *>(dst);
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size_t remaining = src_size;
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size_t total_processed = 0;
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if (const size_t buffered = self->GetBufferedDataSize(); buffered > 0) {
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const size_t partial = std::min(BlockSize - buffered, remaining);
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const size_t processed = self->ProcessPartialData(dst_u8, src_u8, partial);
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dst_u8 += processed;
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total_processed += processed;
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src_u8 += partial;
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remaining -= partial;
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}
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if (remaining >= BlockSize) {
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const size_t num_blocks = remaining / BlockSize;
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const size_t input_size = num_blocks * BlockSize;
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const size_t processed = self->template ProcessBlocks<Cipher>(dst_u8, src_u8, num_blocks);
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dst_u8 += processed;
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total_processed += processed;
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src_u8 += input_size;
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remaining -= input_size;
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}
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if (remaining > 0) {
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const size_t processed = self->ProcessRemainingData(dst_u8, src_u8, remaining);
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total_processed += processed;
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}
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return total_processed;
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}
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}
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