Atmosphere/libraries/libvapours/source/crypto/impl/crypto_xts_mode_impl.arch.generic.cpp

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/*
* Copyright (c) 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 <vapours.hpp>
#include "crypto_update_impl.hpp"
namespace ams::crypto::impl {
size_t XtsModeImpl::UpdateGeneric(void *dst, size_t dst_size, const void *src, size_t src_size) {
AMS_ASSERT(m_state == State_Initialized || m_state == State_Processing);
return UpdateImpl<void>(this, dst, dst_size, src, src_size);
}
size_t XtsModeImpl::ProcessBlocksGeneric(u8 *dst, const u8 *src, size_t num_blocks) {
size_t processed = BlockSize * (num_blocks - 1);
if (m_state == State_Processing) {
this->ProcessBlock(dst, m_last_block);
dst += BlockSize;
processed += BlockSize;
}
while ((--num_blocks) > 0) {
this->ProcessBlock(dst, src);
dst += BlockSize;
src += BlockSize;
}
std::memcpy(m_last_block, src, BlockSize);
m_state = State_Processing;
return processed;
}
template<> size_t XtsModeImpl::Update<AesEncryptor128>(void *dst, size_t dst_size, const void *src, size_t src_size) { return this->UpdateGeneric(dst, dst_size, src, src_size); }
template<> size_t XtsModeImpl::Update<AesEncryptor192>(void *dst, size_t dst_size, const void *src, size_t src_size) { return this->UpdateGeneric(dst, dst_size, src, src_size); }
template<> size_t XtsModeImpl::Update<AesEncryptor256>(void *dst, size_t dst_size, const void *src, size_t src_size) { return this->UpdateGeneric(dst, dst_size, src, src_size); }
template<> size_t XtsModeImpl::Update<AesDecryptor128>(void *dst, size_t dst_size, const void *src, size_t src_size) { return this->UpdateGeneric(dst, dst_size, src, src_size); }
template<> size_t XtsModeImpl::Update<AesDecryptor192>(void *dst, size_t dst_size, const void *src, size_t src_size) { return this->UpdateGeneric(dst, dst_size, src, src_size); }
template<> size_t XtsModeImpl::Update<AesDecryptor256>(void *dst, size_t dst_size, const void *src, size_t src_size) { return this->UpdateGeneric(dst, dst_size, src, src_size); }
}