esp-idf/components/bootloader_support/src/bootloader_common.c

// Copyright 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 <stdbool.h>
#include "rom/crc.h"
#include "esp_flash_data_types.h"

uint32_t bootloader_common_ota_select_crc(const esp_ota_select_entry_t *s)
{
    return crc32_le(UINT32_MAX, (uint8_t*)&s->ota_seq, 4);
}

bool bootloader_common_ota_select_valid(const esp_ota_select_entry_t *s)
{
    return s->ota_seq != UINT32_MAX && s->crc == bootloader_common_ota_select_crc(s);
}