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83ec466b26
Some additional checks related to secure version of the application in anti-rollback case have been added to avoid any attempts to boot lower security version but valid application (e.g., passive partition image). - Read secure_version under sha256 protection - First check has been added in the bootloader to ensure correct secure version after application verification and loading stage. This check happens before setting up the flash cache mapping and handling over the final control to application. This check ensures that application was not swapped (e.g., to lower security version but valid image) just before the load stage in bootloader. - Second check has been added in the application startup code to ensure that currently booting app has higher security version than the one programmed in the eFuse for anti-rollback scenario. This will ensure that only the legit application boots-up on the device for anti-rollback case.
64 lines
2.0 KiB
C
64 lines
2.0 KiB
C
/*
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* SPDX-FileCopyrightText: 2022 Espressif Systems (Shanghai) CO LTD
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#pragma once
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#include <stdint.h>
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#include <stdbool.h>
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#include <stddef.h>
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#include "esp_err.h"
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#include "esp_assert.h"
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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#define ESP_APP_DESC_MAGIC_WORD (0xABCD5432) /*!< The magic word for the esp_app_desc structure that is in DROM. */
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/**
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* @brief Description about application.
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*/
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typedef struct {
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uint32_t magic_word; /*!< Magic word ESP_APP_DESC_MAGIC_WORD */
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uint32_t secure_version; /*!< Secure version */
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uint32_t reserv1[2]; /*!< reserv1 */
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char version[32]; /*!< Application version */
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char project_name[32]; /*!< Project name */
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char time[16]; /*!< Compile time */
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char date[16]; /*!< Compile date*/
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char idf_ver[32]; /*!< Version IDF */
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uint8_t app_elf_sha256[32]; /*!< sha256 of elf file */
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uint32_t reserv2[20]; /*!< reserv2 */
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} esp_app_desc_t;
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/** @cond */
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ESP_STATIC_ASSERT(sizeof(esp_app_desc_t) == 256, "esp_app_desc_t should be 256 bytes");
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ESP_STATIC_ASSERT(offsetof(esp_app_desc_t, secure_version) == 4, "secure_version field must be at 4 offset");
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/** @endcond */
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/**
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* @brief Return esp_app_desc structure. This structure includes app version.
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*
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* Return description for running app.
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* @return Pointer to esp_app_desc structure.
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*/
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const esp_app_desc_t *esp_app_get_description(void);
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/**
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* @brief Fill the provided buffer with SHA256 of the ELF file, formatted as hexadecimal, null-terminated.
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* If the buffer size is not sufficient to fit the entire SHA256 in hex plus a null terminator,
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* the largest possible number of bytes will be written followed by a null.
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* @param dst Destination buffer
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* @param size Size of the buffer
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* @return Number of bytes written to dst (including null terminator)
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*/
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int esp_app_get_elf_sha256(char* dst, size_t size);
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#ifdef __cplusplus
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}
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#endif
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