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SourceVuESP-IDF Framework and ExamplesESP-IDFbootloader_sha256_flash_contents()

bootloader_sha256_flash_contents() function

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.

Syntax

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Summary

Declaration

Definition

from bootloader_utility.h:132

esp_err_t bootloader_sha256_flash_contents(uint32_t flash_offset, uint32_t len, uint8_t *digest);

Implemented in bootloader_utility.c:1018

Arguments

Argument

Description

flash_offset

Offset of the data in flash.

len

Length of data in bytes.

digest

Pointer to buffer where the digest is written, if ESP_OK is returned.

Return value

ESP_OK if secure boot digest is generated successfully.

References

Code

Location

Referrer

esp_err_t bootloader_sha256_flash_contents(uint32_t flash_offset, uint32_t len, uint8_t *digest)

bootloader_utility.c:1018

esp_err_t bootloader_sha256_flash_contents(uint32_t flash_offset, uint32_t len, uint8_t *digest);

bootloader_utility.h:132

esp_err_t error = bootloader_sha256_flash_contents(address, data.image_len - ESP_PARTITION_HASH_LEN, calc_sha256);

bootloader_common.c:162

bootloader_common_get_sha256_of_partition()

return bootloader_sha256_flash_contents(address, size, out_sha_256);

bootloader_common.c:172

bootloader_common_get_sha256_of_partition()

Call Tree

bootloader_sha256_flash_contents() is called by 1 function and calls 6 functions:

bootloader_common_get_sha256_of_partition()

bootloader_sha256_flash_contents()

bootloader_mmap_get_free_pages()

bootloader_mmap()

bootloader_munmap()

bootloader_sha256_start()

bootloader_sha256_data()

bootloader_sha256_finish()

Data Use

bootloader_sha256_flash_contents():

bootloader_sha256_flash_contents()

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