1  // Copyright 2017 Espressif Systems (Shanghai) PTE LTD
 2  //
 3  // Licensed under the Apache License, Version 2.0 (the "License");
 4  // you may not use this file except in compliance with the License.
 5  // You may obtain a copy of the License at
 6  
 7  //     http://www.apache.org/licenses/LICENSE-2.0
 8  //
 9  // Unless required by applicable law or agreed to in writing, software
10  // distributed under the License is distributed on an "AS IS" BASIS,
11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12  // See the License for the specific language governing permissions and
13  // limitations under the License.
14  #pragma once
15  
16  /* Provide a SHA256 API for bootloader_support code,
17     that can be used from bootloader or app code.
18  
19     This header is available to source code in the bootloader & bootloader_support components only.
20     Use mbedTLS APIs or include esp32/sha.h to calculate SHA256 in IDF apps.
21  */
22  
23  #include <stdint.h>
24  #include <stdlib.h>
25  #include "esp_err.h"
26  
27  typedef void *bootloader_sha256_handle_t;
28  
29  bootloader_sha256_handle_t bootloader_sha256_start(void);
30  
31  void bootloader_sha256_data(bootloader_sha256_handle_t handle, const void *data, size_t data_len);
32  
33  void bootloader_sha256_finish(bootloader_sha256_handle_t handle, uint8_t *digest);