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 #include "randombytes_default.h"
15 #include "esp_system.h"
16
randombytes_esp32_implementation_name(void)17 static const char *randombytes_esp32_implementation_name(void)
18 {
19 return "esp32";
20 }
21
22 /*
23 Plug the ESP32 hardware RNG into libsodium's custom RNG support, as per
24 https://download.libsodium.org/doc/advanced/custom_rng.html
25
26 Note that this RNG is selected by default (see randombytes_default.h), so there
27 is no need to call randombytes_set_implementation().
28 */
29 const struct randombytes_implementation randombytes_esp32_implementation = {
30 .implementation_name = randombytes_esp32_implementation_name,
31 .random = esp_random,
32 .stir = NULL,
33 .uniform = NULL,
34 .buf = esp_fill_random,
35 .close = NULL,
36 };
37
