esp-idf/components/nvs_flash/src/nvs_encrypted_partition.hpp

// Copyright 2019 Espressif Systems (Shanghai) PTE LTD
//
// 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.

#ifndef NVS_ENCRYPTED_PARTITION_HPP_
#define NVS_ENCRYPTED_PARTITION_HPP_

#include "mbedtls/aes.h"
#include "nvs_flash.h"
#include "nvs_partition.hpp"

namespace nvs {

class NVSEncryptedPartition : public NVSPartition {
public:
    NVSEncryptedPartition(const esp_partition_t *partition);

    virtual ~NVSEncryptedPartition() { }

    esp_err_t init(nvs_sec_cfg_t* cfg);

    esp_err_t read(size_t src_offset, void* dst, size_t size) override;

    esp_err_t write(size_t dst_offset, const void* src, size_t size) override;

protected:
    mbedtls_aes_xts_context mEctxt;
    mbedtls_aes_xts_context mDctxt;
};

} // nvs

#endif // NVS_ENCRYPTED_PARTITION_HPP_