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bootloader: Adds bootloader_sha256_flash_contents()

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KonstantinKondrashov
2020-08-06 15:22:26 +08:00
parent 035783039b
commit 9ce137139b
7 changed files with 58 additions and 4 deletions
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14
components/bootloader_support/include_bootloader/bootloader_utility.h
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@@ -62,3 +62,17 @@ __attribute__((noreturn)) void bootloader_utility_load_boot_image(const bootload
* It is not recommended to call this function from an app (if called, the app will abort).
*/
__attribute__((noreturn)) void bootloader_reset(void);
/** @brief Generates the digest of the data between offset & offset+length.
*
* This function should be used when the size of the data is larger than 3.2MB.
* The MMU capacity is 3.2MB (50 pages - 64KB each). This function generates the SHA-256
* of the data in chunks of 3.2MB, considering the MMU capacity.
*
* @param[in] flash_offset Offset of the data in flash.
* @param[in] len Length of data in bytes.
* @param[out] digest Pointer to buffer where the digest is written, if ESP_OK is returned.
*
* @return ESP_OK if secure boot digest is generated successfully.
*/
esp_err_t bootloader_sha256_flash_contents(uint32_t flash_offset, uint32_t len, uint8_t *digest);