Function esp_idf_hal::sys::esp_ota_get_app_elf_sha256

pub unsafe extern "C" fn esp_ota_get_app_elf_sha256(
    dst: *mut i8,
    size: usize,
) -> i32

@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.

@note This API is present for backward compatibility reasons. Alternative function with the same functionality is esp_app_get_elf_sha256

@param dst Destination buffer @param size Size of the buffer @return Number of bytes written to dst (including null terminator)