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185 lines
7.3 KiB
C
185 lines
7.3 KiB
C
// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#pragma once
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#include <stdbool.h>
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#include <esp_err.h>
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#include "esp_flash_partitions.h"
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#include "esp_app_format.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define ESP_ERR_IMAGE_BASE 0x2000
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#define ESP_ERR_IMAGE_FLASH_FAIL (ESP_ERR_IMAGE_BASE + 1)
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#define ESP_ERR_IMAGE_INVALID (ESP_ERR_IMAGE_BASE + 2)
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/* Support for app/bootloader image parsing
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Can be compiled as part of app or bootloader code.
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*/
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#define ESP_IMAGE_HASH_LEN 32 /* Length of the appended SHA-256 digest */
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/* Structure to hold on-flash image metadata */
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typedef struct {
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uint32_t start_addr; /* Start address of image */
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esp_image_header_t image; /* Header for entire image */
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esp_image_segment_header_t segments[ESP_IMAGE_MAX_SEGMENTS]; /* Per-segment header data */
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uint32_t segment_data[ESP_IMAGE_MAX_SEGMENTS]; /* Data offsets for each segment */
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uint32_t image_len; /* Length of image on flash, in bytes */
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uint8_t image_digest[32]; /* appended SHA-256 digest */
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} esp_image_metadata_t;
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typedef enum {
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ESP_IMAGE_VERIFY, /* Verify image contents, not load to memory, load metadata. Print errors. */
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ESP_IMAGE_VERIFY_SILENT, /* Verify image contents, not load to memory, load metadata. Don't print errors. */
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#ifdef BOOTLOADER_BUILD
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ESP_IMAGE_LOAD, /* Verify image contents, load to memory, load metadata. Print errors. */
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ESP_IMAGE_LOAD_NO_VALIDATE, /* Not verify image contents, load to memory, load metadata. Print errors. */
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#endif
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} esp_image_load_mode_t;
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typedef struct {
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esp_partition_pos_t partition; /*!< Partition of application which worked before goes to the deep sleep. */
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uint16_t reboot_counter; /*!< Reboot counter. Reset only when power is off. */
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uint16_t reserve; /*!< Reserve */
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#ifdef CONFIG_BOOTLOADER_CUSTOM_RESERVE_RTC
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uint8_t custom[CONFIG_BOOTLOADER_CUSTOM_RESERVE_RTC_SIZE]; /*!< Reserve for custom propose */
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#endif
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uint32_t crc; /*!< Check sum crc32 */
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} rtc_retain_mem_t;
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#ifdef CONFIG_BOOTLOADER_CUSTOM_RESERVE_RTC
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_Static_assert(CONFIG_BOOTLOADER_CUSTOM_RESERVE_RTC_SIZE % 4 == 0, "CONFIG_BOOTLOADER_CUSTOM_RESERVE_RTC_SIZE must be a multiple of 4 bytes");
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#endif
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#if defined(CONFIG_BOOTLOADER_SKIP_VALIDATE_IN_DEEP_SLEEP) || defined(CONFIG_BOOTLOADER_CUSTOM_RESERVE_RTC)
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_Static_assert(CONFIG_BOOTLOADER_RESERVE_RTC_SIZE % 4 == 0, "CONFIG_BOOTLOADER_RESERVE_RTC_SIZE must be a multiple of 4 bytes");
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#endif
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#ifdef CONFIG_BOOTLOADER_CUSTOM_RESERVE_RTC
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#define ESP_BOOTLOADER_RESERVE_RTC (CONFIG_BOOTLOADER_RESERVE_RTC_SIZE + CONFIG_BOOTLOADER_CUSTOM_RESERVE_RTC_SIZE)
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#elif defined(CONFIG_BOOTLOADER_SKIP_VALIDATE_IN_DEEP_SLEEP)
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#define ESP_BOOTLOADER_RESERVE_RTC (CONFIG_BOOTLOADER_RESERVE_RTC_SIZE)
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#endif
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#if defined(CONFIG_BOOTLOADER_SKIP_VALIDATE_IN_DEEP_SLEEP) || defined(CONFIG_BOOTLOADER_CUSTOM_RESERVE_RTC)
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_Static_assert(sizeof(rtc_retain_mem_t) <= ESP_BOOTLOADER_RESERVE_RTC, "Reserved RTC area must exceed size of rtc_retain_mem_t");
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#endif
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/**
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* @brief Verify an app image.
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*
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* If encryption is enabled, data will be transparently decrypted.
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*
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* @param mode Mode of operation (verify, silent verify, or load).
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* @param part Partition to load the app from.
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* @param[inout] data Pointer to the image metadata structure which is be filled in by this function.
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* 'start_addr' member should be set (to the start address of the image.)
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* Other fields will all be initialised by this function.
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*
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* Image validation checks:
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* - Magic byte.
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* - Partition smaller than 16MB.
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* - All segments & image fit in partition.
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* - 8 bit image checksum is valid.
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* - SHA-256 of image is valid (if image has this appended).
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* - (Signature) if signature verification is enabled.
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*
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* @return
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* - ESP_OK if verify or load was successful
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* - ESP_ERR_IMAGE_FLASH_FAIL if a SPI flash error occurs
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* - ESP_ERR_IMAGE_INVALID if the image appears invalid.
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* - ESP_ERR_INVALID_ARG if the partition or data pointers are invalid.
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*/
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esp_err_t esp_image_verify(esp_image_load_mode_t mode, const esp_partition_pos_t *part, esp_image_metadata_t *data);
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/**
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* @brief Verify and load an app image (available only in space of bootloader).
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*
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* If encryption is enabled, data will be transparently decrypted.
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*
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* @param part Partition to load the app from.
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* @param[inout] data Pointer to the image metadata structure which is be filled in by this function.
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* 'start_addr' member should be set (to the start address of the image.)
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* Other fields will all be initialised by this function.
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*
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* Image validation checks:
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* - Magic byte.
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* - Partition smaller than 16MB.
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* - All segments & image fit in partition.
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* - 8 bit image checksum is valid.
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* - SHA-256 of image is valid (if image has this appended).
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* - (Signature) if signature verification is enabled.
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*
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* @return
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* - ESP_OK if verify or load was successful
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* - ESP_ERR_IMAGE_FLASH_FAIL if a SPI flash error occurs
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* - ESP_ERR_IMAGE_INVALID if the image appears invalid.
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* - ESP_ERR_INVALID_ARG if the partition or data pointers are invalid.
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*/
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esp_err_t bootloader_load_image(const esp_partition_pos_t *part, esp_image_metadata_t *data);
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/**
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* @brief Load an app image without verification (available only in space of bootloader).
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*
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* If encryption is enabled, data will be transparently decrypted.
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*
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* @param part Partition to load the app from.
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* @param[inout] data Pointer to the image metadata structure which is be filled in by this function.
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* 'start_addr' member should be set (to the start address of the image.)
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* Other fields will all be initialised by this function.
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*
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* @return
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* - ESP_OK if verify or load was successful
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* - ESP_ERR_IMAGE_FLASH_FAIL if a SPI flash error occurs
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* - ESP_ERR_IMAGE_INVALID if the image appears invalid.
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* - ESP_ERR_INVALID_ARG if the partition or data pointers are invalid.
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*/
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esp_err_t bootloader_load_image_no_verify(const esp_partition_pos_t *part, esp_image_metadata_t *data);
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/**
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* @brief Verify the bootloader image.
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*
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* @param[out] If result is ESP_OK and this pointer is non-NULL, it
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* will be set to the length of the bootloader image.
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*
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* @return As per esp_image_load_metadata().
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*/
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esp_err_t esp_image_verify_bootloader(uint32_t *length);
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/**
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* @brief Verify the bootloader image.
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*
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* @param[out] Metadata for the image. Only valid if result is ESP_OK.
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*
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* @return As per esp_image_load_metadata().
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*/
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esp_err_t esp_image_verify_bootloader_data(esp_image_metadata_t *data);
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typedef struct {
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uint32_t drom_addr;
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uint32_t drom_load_addr;
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uint32_t drom_size;
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uint32_t irom_addr;
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uint32_t irom_load_addr;
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uint32_t irom_size;
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} esp_image_flash_mapping_t;
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#ifdef __cplusplus
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}
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#endif
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