1 /*
2  * SPDX-FileCopyrightText: 2020-2022 Espressif Systems (Shanghai) CO LTD
3  *
4  * SPDX-License-Identifier: Apache-2.0
5  */
6 
7 #pragma once
8 
9 #include "sdkconfig.h"
10 #if CONFIG_ESP32_REV_MIN_FULL >= 300
11 
12 #include <stdint.h>
13 #include <stdbool.h>
14 #include <stddef.h>
15 
16 #ifdef __cplusplus
17 extern "C" {
18 #endif
19 
20 #define ETS_SIG_LEN 384 /* Bytes */
21 #define ETS_DIGEST_LEN 32 /* SHA-256, bytes */
22 
23 /* Secure Boot Version 2 - Public Key format */
24 typedef struct {
25     uint8_t n[384]; /* Public key modulus */
26     uint32_t e;     /* Public key exponent */
27     uint8_t rinv[384];
28     uint32_t mdash;
29 } ets_rsa_pubkey_t;
30 
31 
32 bool ets_rsa_pss_verify(const ets_rsa_pubkey_t *key, const uint8_t *sig, const uint8_t *digest, uint8_t *verified_digest);
33 
34 void ets_mgf1_sha256(const uint8_t *mgfSeed, size_t seedLen, size_t maskLen, uint8_t *mask);
35 
36 bool ets_emsa_pss_verify(const uint8_t *encoded_message, const uint8_t *mhash, uint8_t *verified_digest);
37 
38 #ifdef __cplusplus
39 }
40 #endif
41 
42 #endif // CONFIG_ESP32_REV_MIN_FULL >= 300
43