mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
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62 lines
1.8 KiB
C++
62 lines
1.8 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 <vapours.hpp>
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#include "crypto_update_impl.hpp"
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namespace ams::crypto::impl {
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void CbcMacImpl::UpdateGeneric(const void *data, size_t size) {
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/* Check pre-conditions. */
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AMS_ASSERT(m_state == State_Initialized);
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/* Update. */
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UpdateImpl<void>(this, data, size);
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}
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void CbcMacImpl::ProcessBlocksGeneric(const void *data, size_t num_blocks) {
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/* If we have a block remaining, process it. */
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if (m_buffered_bytes == BlockSize) {
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this->ProcessBlock(m_buffer);
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m_buffered_bytes = 0;
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}
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/* Process blocks. */
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const u8 *data8 = static_cast<const u8 *>(data);
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u8 block[BlockSize];
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while ((--num_blocks) > 0) {
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for (size_t i = 0; i < BlockSize; ++i) {
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block[i] = data8[i] ^ m_mac[i];
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}
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m_cipher_function(m_mac, block, m_cipher_context);
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data8 += BlockSize;
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}
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/* Process the last block. */
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std::memcpy(m_buffer, data8, BlockSize);
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m_buffered_bytes = BlockSize;
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}
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template<>
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void CbcMacImpl::Update<AesEncryptor128>(const void *data, size_t size) {
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this->UpdateGeneric(data, size);
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}
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}
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