OVMS3-idf/components/nvs_flash/src/nvs_ops.cpp

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// Copyright 2015-2018 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.
#include "esp_spi_flash.h"
#include "nvs_ops.hpp"
#ifdef CONFIG_NVS_ENCRYPTION
#include "nvs_encr.hpp"
#include <string.h>
#endif
namespace nvs
{
#ifdef CONFIG_NVS_ENCRYPTION
esp_err_t nvs_flash_write(size_t destAddr, const void *srcAddr, size_t size) {
if(EncrMgr::isEncrActive()) {
auto encrMgr = EncrMgr::getInstance();
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if (!encrMgr) return ESP_ERR_NO_MEM;
auto xtsCtxt = encrMgr->findXtsCtxtFromAddr(destAddr);
if(xtsCtxt) {
uint8_t* buf = static_cast<uint8_t*>(malloc(size));
memcpy(buf, srcAddr, size);
auto err = encrMgr->encryptNvsData(buf, destAddr, size, xtsCtxt);
if( err != ESP_OK) {
return err;
}
err = spi_flash_write(destAddr, buf, size);
delete buf;
return err;
}
}
return spi_flash_write(destAddr, srcAddr, size);
}
esp_err_t nvs_flash_read(size_t srcAddr, void *destAddr, size_t size) {
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auto err = spi_flash_read(srcAddr, destAddr, size);
if(err != ESP_OK) {
return err;
}
if(EncrMgr::isEncrActive()) {
auto encrMgr = EncrMgr::getInstance();
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if (!encrMgr) return ESP_ERR_NO_MEM;
auto xtsCtxt = encrMgr->findXtsCtxtFromAddr(srcAddr);
if(xtsCtxt) {
return encrMgr->decryptNvsData(static_cast<uint8_t*>(destAddr),
srcAddr, size, xtsCtxt);
}
}
return ESP_OK;
}
#else
esp_err_t nvs_flash_write(size_t destAddr, const void *srcAddr, size_t size) {
return spi_flash_write(destAddr, srcAddr, size);
}
esp_err_t nvs_flash_read(size_t srcAddr, void *destAddr, size_t size) {
return spi_flash_read(srcAddr, destAddr, size);
}
#endif
}