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/*
* Copyright (c) 2017 Samsung Electronics Co., Ltd All Rights Reserved
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License
*/
/*
* @file tz-memory.cpp
* @author Lukasz Kostyra (l.kostyra@samsung.com)
* @version 1.0
* @brief TrustZone Shared Memory wrapper definitions
*/
#include <tz-backend/tz-memory.h>
#include <generic-backend/exception.h>
#include <dpl/log/log.h>
#include <cstring>
namespace CKM {
namespace Crypto {
namespace TZ {
namespace Internals {
TrustZoneMemory::TrustZoneMemory(TEEC_Context &context, const size_t size, const uint32_t flags)
{
Allocate(context, size, flags);
}
TrustZoneMemory::~TrustZoneMemory()
{
Release();
}
void TrustZoneMemory::Allocate(TEEC_Context &context, const size_t size, const uint32_t flags)
{
m_SharedMemory.size = size;
m_SharedMemory.flags = flags;
LogDebug("Allocating " << size << " bytes of shared TZ memory, flags: " << flags);
TEEC_Result result = TEEC_AllocateSharedMemory(&context, &m_SharedMemory);
if (result != TEEC_SUCCESS) {
ThrowErr(Exc::Crypto::InternalError, "TZ failed to register memory: ",
static_cast<uint32_t>(result));
}
memset(m_SharedMemory.buffer, 0, m_SharedMemory.size);
}
TEEC_SharedMemory* TrustZoneMemory::Get() const
{
return &m_SharedMemory;
}
void TrustZoneMemory::Release()
{
TEEC_ReleaseSharedMemory(&m_SharedMemory);
}
} // namespace Internals
} // namespace TZ
} // namespace Crypto
} // namespace CKM
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