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