/* * SPDX-FileCopyrightText: 2015-2021 Espressif Systems (Shanghai) CO LTD * * SPDX-License-Identifier: Apache-2.0 */ #ifndef _OTA_OPS_H #define _OTA_OPS_H #include #include #include #include "esp_err.h" #include "esp_partition.h" #include "esp_image_format.h" #include "esp_flash_partitions.h" #ifdef __cplusplus extern "C" { #endif #define OTA_SIZE_UNKNOWN 0xffffffff /*!< Used for esp_ota_begin() if new image size is unknown */ #define OTA_WITH_SEQUENTIAL_WRITES 0xfffffffe /*!< Used for esp_ota_begin() if new image size is unknown and erase can be done in incremental manner (assuming write operation is in continuous sequence) */ #define ESP_ERR_OTA_BASE 0x1500 /*!< Base error code for ota_ops api */ #define ESP_ERR_OTA_PARTITION_CONFLICT (ESP_ERR_OTA_BASE + 0x01) /*!< Error if request was to write or erase the current running partition */ #define ESP_ERR_OTA_SELECT_INFO_INVALID (ESP_ERR_OTA_BASE + 0x02) /*!< Error if OTA data partition contains invalid content */ #define ESP_ERR_OTA_VALIDATE_FAILED (ESP_ERR_OTA_BASE + 0x03) /*!< Error if OTA app image is invalid */ #define ESP_ERR_OTA_SMALL_SEC_VER (ESP_ERR_OTA_BASE + 0x04) /*!< Error if the firmware has a secure version less than the running firmware. */ #define ESP_ERR_OTA_ROLLBACK_FAILED (ESP_ERR_OTA_BASE + 0x05) /*!< Error if flash does not have valid firmware in passive partition and hence rollback is not possible */ #define ESP_ERR_OTA_ROLLBACK_INVALID_STATE (ESP_ERR_OTA_BASE + 0x06) /*!< Error if current active firmware is still marked in pending validation state (ESP_OTA_IMG_PENDING_VERIFY), essentially first boot of firmware image post upgrade and hence firmware upgrade is not possible */ /** * @brief Opaque handle for an application OTA update * * esp_ota_begin() returns a handle which is then used for subsequent * calls to esp_ota_write() and esp_ota_end(). */ typedef uint32_t esp_ota_handle_t; /** * @brief Return esp_app_desc structure. This structure includes app version. * * Return description for running app. * @return Pointer to esp_app_desc structure. */ const esp_app_desc_t *esp_ota_get_app_description(void); /** * @brief Fill the provided buffer with SHA256 of the ELF file, formatted as hexadecimal, null-terminated. * If the buffer size is not sufficient to fit the entire SHA256 in hex plus a null terminator, * the largest possible number of bytes will be written followed by a null. * @param dst Destination buffer * @param size Size of the buffer * @return Number of bytes written to dst (including null terminator) */ int esp_ota_get_app_elf_sha256(char* dst, size_t size); /** * @brief Commence an OTA update writing to the specified partition. * The specified partition is erased to the specified image size. * * If image size is not yet known, pass OTA_SIZE_UNKNOWN which will * cause the entire partition to be erased. * * On success, this function allocates memory that remains in use * until esp_ota_end() is called with the returned handle. * * Note: If the rollback option is enabled and the running application has the ESP_OTA_IMG_PENDING_VERIFY state then * it will lead to the ESP_ERR_OTA_ROLLBACK_INVALID_STATE error. Confirm the running app before to run download a new app, * use esp_ota_mark_app_valid_cancel_rollback() function for it (this should be done as early as possible when you first download a new application). * * @param partition Pointer to info for partition which will receive the OTA update. Required. * @param image_size Size of new OTA app image. Partition will be erased in order to receive this size of image. If 0 or OTA_SIZE_UNKNOWN, the entire partition is erased. * @param out_handle On success, returns a handle which should be used for subsequent esp_ota_write() and esp_ota_end() calls. * @return * - ESP_OK: OTA operation commenced successfully. * - ESP_ERR_INVALID_ARG: partition or out_handle arguments were NULL, or partition doesn't point to an OTA app partition. * - ESP_ERR_NO_MEM: Cannot allocate memory for OTA operation. * - ESP_ERR_OTA_PARTITION_CONFLICT: Partition holds the currently running firmware, cannot update in place. * - ESP_ERR_NOT_FOUND: Partition argument not found in partition table. * - ESP_ERR_OTA_SELECT_INFO_INVALID: The OTA data partition contains invalid data. * - ESP_ERR_INVALID_SIZE: Partition doesn't fit in configured flash size. * - ESP_ERR_FLASH_OP_TIMEOUT or ESP_ERR_FLASH_OP_FAIL: Flash write failed. * - ESP_ERR_OTA_ROLLBACK_INVALID_STATE: If the running app has not confirmed state. Before performing an update, the application must be valid. */ esp_err_t esp_ota_begin(const esp_partition_t* partition, size_t image_size, esp_ota_handle_t* out_handle); /** * @brief Write OTA update data to partition * * This function can be called multiple times as * data is received during the OTA operation. Data is written * sequentially to the partition. * * @param handle Handle obtained from esp_ota_begin * @param data Data buffer to write * @param size Size of data buffer in bytes. * * @return * - ESP_OK: Data was written to flash successfully. * - ESP_ERR_INVALID_ARG: handle is invalid. * - ESP_ERR_OTA_VALIDATE_FAILED: First byte of image contains invalid app image magic byte. * - ESP_ERR_FLASH_OP_TIMEOUT or ESP_ERR_FLASH_OP_FAIL: Flash write failed. * - ESP_ERR_OTA_SELECT_INFO_INVALID: OTA data partition has invalid contents */ esp_err_t esp_ota_write(esp_ota_handle_t handle, const void* data, size_t size); /** * @brief Write OTA update data to partition * * This function can write data in non contiguous manner. * If flash encryption is enabled, data should be 16 byte aligned. * * @param handle Handle obtained from esp_ota_begin * @param data Data buffer to write * @param size Size of data buffer in bytes * @param offset Offset in flash partition * * @note While performing OTA, if the packets arrive out of order, esp_ota_write_with_offset() can be used to write data in non contiguous manner. * Use of esp_ota_write_with_offset() in combination with esp_ota_write() is not recommended. * * @return * - ESP_OK: Data was written to flash successfully. * - ESP_ERR_INVALID_ARG: handle is invalid. * - ESP_ERR_OTA_VALIDATE_FAILED: First byte of image contains invalid app image magic byte. * - ESP_ERR_FLASH_OP_TIMEOUT or ESP_ERR_FLASH_OP_FAIL: Flash write failed. * - ESP_ERR_OTA_SELECT_INFO_INVALID: OTA data partition has invalid contents */ esp_err_t esp_ota_write_with_offset(esp_ota_handle_t handle, const void *data, size_t size, uint32_t offset); /** * @brief Finish OTA update and validate newly written app image. * * @param handle Handle obtained from esp_ota_begin(). * * @note After calling esp_ota_end(), the handle is no longer valid and any memory associated with it is freed (regardless of result). * * @return * - ESP_OK: Newly written OTA app image is valid. * - ESP_ERR_NOT_FOUND: OTA handle was not found. * - ESP_ERR_INVALID_ARG: Handle was never written to. * - ESP_ERR_OTA_VALIDATE_FAILED: OTA image is invalid (either not a valid app image, or - if secure boot is enabled - signature failed to verify.) * - ESP_ERR_INVALID_STATE: If flash encryption is enabled, this result indicates an internal error writing the final encrypted bytes to flash. */ esp_err_t esp_ota_end(esp_ota_handle_t handle); /** * @brief Abort OTA update, free the handle and memory associated with it. * * @param handle obtained from esp_ota_begin(). * * @return * - ESP_OK: Handle and its associated memory is freed successfully. * - ESP_ERR_NOT_FOUND: OTA handle was not found. */ esp_err_t esp_ota_abort(esp_ota_handle_t handle); /** * @brief Configure OTA data for a new boot partition * * @note If this function returns ESP_OK, calling esp_restart() will boot the newly configured app partition. * * @param partition Pointer to info for partition containing app image to boot. * * @return * - ESP_OK: OTA data updated, next reboot will use specified partition. * - ESP_ERR_INVALID_ARG: partition argument was NULL or didn't point to a valid OTA partition of type "app". * - ESP_ERR_OTA_VALIDATE_FAILED: Partition contained invalid app image. Also returned if secure boot is enabled and signature validation failed. * - ESP_ERR_NOT_FOUND: OTA data partition not found. * - ESP_ERR_FLASH_OP_TIMEOUT or ESP_ERR_FLASH_OP_FAIL: Flash erase or write failed. */ esp_err_t esp_ota_set_boot_partition(const esp_partition_t* partition); /** * @brief Get partition info of currently configured boot app * * If esp_ota_set_boot_partition() has been called, the partition which was set by that function will be returned. * * If esp_ota_set_boot_partition() has not been called, the result is usually the same as esp_ota_get_running_partition(). * The two results are not equal if the configured boot partition does not contain a valid app (meaning that the running partition * will be an app that the bootloader chose via fallback). * * If the OTA data partition is not present or not valid then the result is the first app partition found in the * partition table. In priority order, this means: the factory app, the first OTA app slot, or the test app partition. * * Note that there is no guarantee the returned partition is a valid app. Use esp_image_verify(ESP_IMAGE_VERIFY, ...) to verify if the * returned partition contains a bootable image. * * @return Pointer to info for partition structure, or NULL if partition table is invalid or a flash read operation failed. Any returned pointer is valid for the lifetime of the application. */ const esp_partition_t* esp_ota_get_boot_partition(void); /** * @brief Get partition info of currently running app * * This function is different to esp_ota_get_boot_partition() in that * it ignores any change of selected boot partition caused by * esp_ota_set_boot_partition(). Only the app whose code is currently * running will have its partition information returned. * * The partition returned by this function may also differ from esp_ota_get_boot_partition() if the configured boot * partition is somehow invalid, and the bootloader fell back to a different app partition at boot. * * @return Pointer to info for partition structure, or NULL if no partition is found or flash read operation failed. Returned pointer is valid for the lifetime of the application. */ const esp_partition_t* esp_ota_get_running_partition(void); /** * @brief Return the next OTA app partition which should be written with a new firmware. * * Call this function to find an OTA app partition which can be passed to esp_ota_begin(). * * Finds next partition round-robin, starting from the current running partition. * * @param start_from If set, treat this partition info as describing the current running partition. Can be NULL, in which case esp_ota_get_running_partition() is used to find the currently running partition. The result of this function is never the same as this argument. * * @return Pointer to info for partition which should be updated next. NULL result indicates invalid OTA data partition, or that no eligible OTA app slot partition was found. * */ const esp_partition_t* esp_ota_get_next_update_partition(const esp_partition_t *start_from); /** * @brief Returns esp_app_desc structure for app partition. This structure includes app version. * * Returns a description for the requested app partition. * @param[in] partition Pointer to app partition. (only app partition) * @param[out] app_desc Structure of info about app. * @return * - ESP_OK Successful. * - ESP_ERR_NOT_FOUND app_desc structure is not found. Magic word is incorrect. * - ESP_ERR_NOT_SUPPORTED Partition is not application. * - ESP_ERR_INVALID_ARG Arguments is NULL or if partition's offset exceeds partition size. * - ESP_ERR_INVALID_SIZE Read would go out of bounds of the partition. * - or one of error codes from lower-level flash driver. */ esp_err_t esp_ota_get_partition_description(const esp_partition_t *partition, esp_app_desc_t *app_desc); /** * @brief This function is called to indicate that the running app is working well. * * @return * - ESP_OK: if successful. */ esp_err_t esp_ota_mark_app_valid_cancel_rollback(void); /** * @brief This function is called to roll back to the previously workable app with reboot. * * If rollback is successful then device will reset else API will return with error code. * Checks applications on a flash drive that can be booted in case of rollback. * If the flash does not have at least one app (except the running app) then rollback is not possible. * @return * - ESP_FAIL: if not successful. * - ESP_ERR_OTA_ROLLBACK_FAILED: The rollback is not possible due to flash does not have any apps. */ esp_err_t esp_ota_mark_app_invalid_rollback_and_reboot(void); /** * @brief Returns last partition with invalid state (ESP_OTA_IMG_INVALID or ESP_OTA_IMG_ABORTED). * * @return partition. */ const esp_partition_t* esp_ota_get_last_invalid_partition(void); /** * @brief Returns state for given partition. * * @param[in] partition Pointer to partition. * @param[out] ota_state state of partition (if this partition has a record in otadata). * @return * - ESP_OK: Successful. * - ESP_ERR_INVALID_ARG: partition or ota_state arguments were NULL. * - ESP_ERR_NOT_SUPPORTED: partition is not ota. * - ESP_ERR_NOT_FOUND: Partition table does not have otadata or state was not found for given partition. */ esp_err_t esp_ota_get_state_partition(const esp_partition_t *partition, esp_ota_img_states_t *ota_state); /** * @brief Erase previous boot app partition and corresponding otadata select for this partition. * * When current app is marked to as valid then you can erase previous app partition. * @return * - ESP_OK: Successful, otherwise ESP_ERR. */ esp_err_t esp_ota_erase_last_boot_app_partition(void); /** * @brief Checks applications on the slots which can be booted in case of rollback. * * These applications should be valid (marked in otadata as not UNDEFINED, INVALID or ABORTED and crc is good) and be able booted, * and secure_version of app >= secure_version of efuse (if anti-rollback is enabled). * * @return * - True: Returns true if the slots have at least one app (except the running app). * - False: The rollback is not possible. */ bool esp_ota_check_rollback_is_possible(void); #if SOC_EFUSE_SECURE_BOOT_KEY_DIGESTS > 1 && (CONFIG_SECURE_BOOT_V2_ENABLED || __DOXYGEN__) /** * Secure Boot V2 public key indexes. */ typedef enum { SECURE_BOOT_PUBLIC_KEY_INDEX_0, /*!< Points to the 0th index of the Secure Boot v2 public key */ SECURE_BOOT_PUBLIC_KEY_INDEX_1, /*!< Points to the 1st index of the Secure Boot v2 public key */ SECURE_BOOT_PUBLIC_KEY_INDEX_2 /*!< Points to the 2nd index of the Secure Boot v2 public key */ } esp_ota_secure_boot_public_key_index_t; /** * @brief Revokes the old signature digest. To be called in the application after the rollback logic. * * Relevant for Secure boot v2 on ESP32-S2 where upto 3 key digests can be stored (Key #N-1, Key #N, Key #N+1). * When key #N-1 used to sign an app is invalidated, an OTA update is to be sent with an app signed with key #N-1 & Key #N. * After successfully booting the OTA app should call this function to revoke Key #N-1. * * @param index - The index of the signature block to be revoked * * @return * - ESP_OK: If revocation is successful. * - ESP_ERR_INVALID_ARG: If the index of the public key to be revoked is incorrect. * - ESP_FAIL: If secure boot v2 has not been enabled. */ esp_err_t esp_ota_revoke_secure_boot_public_key(esp_ota_secure_boot_public_key_index_t index); #endif /* SOC_EFUSE_SECURE_BOOT_KEY_DIGESTS > 1 */ #ifdef __cplusplus } #endif #endif /* OTA_OPS_H */