1 // Copyright 2020 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 15 #pragma once 16 17 #include "sdkconfig.h" 18 #ifdef CONFIG_ESP32_REV_MIN_3 19 20 #include <stdint.h> 21 #include <stdbool.h> 22 #include <stddef.h> 23 24 #ifdef __cplusplus 25 extern "C" { 26 #endif 27 28 #define ETS_SIG_LEN 384 /* Bytes */ 29 #define ETS_DIGEST_LEN 32 /* SHA-256, bytes */ 30 31 /* Secure Boot Version 2 - Public Key format */ 32 typedef struct { 33 uint8_t n[384]; /* Public key modulus */ 34 uint32_t e; /* Public key exponent */ 35 uint8_t rinv[384]; 36 uint32_t mdash; 37 } ets_rsa_pubkey_t; 38 39 40 bool ets_rsa_pss_verify(const ets_rsa_pubkey_t *key, const uint8_t *sig, const uint8_t *digest, uint8_t *verified_digest); 41 42 void ets_mgf1_sha256(const uint8_t *mgfSeed, size_t seedLen, size_t maskLen, uint8_t *mask); 43 44 bool ets_emsa_pss_verify(const uint8_t *encoded_message, const uint8_t *mhash, uint8_t *verified_digest); 45 46 #ifdef __cplusplus 47 } 48 #endif 49 50 #endif // CONFIG_ESP32_REV_MIN_3 51