46 lines
1.5 KiB
C
46 lines
1.5 KiB
C
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// Copyright 2017 Espressif Systems (Shanghai) PTE LTD
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "randombytes_default.h"
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#include "esp_system.h"
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static void randombytes_esp32_random_buf(void * const buf, const size_t size)
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{
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uint8_t *p = (uint8_t *)buf;
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for (size_t i = 0; i < size; i++) {
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p[i] = esp_random();
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}
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}
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static const char *randombytes_esp32_implementation_name(void)
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{
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return "esp32";
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}
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/*
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Plug the ESP32 hardware RNG into libsodium's custom RNG support, as per
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https://download.libsodium.org/doc/advanced/custom_rng.html
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Note that this RNG is selected by default (see randombytes_default.h), so there
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is no need to call randombytes_set_implementation().
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*/
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const struct randombytes_implementation randombytes_esp32_implementation = {
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.implementation_name = randombytes_esp32_implementation_name,
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.random = esp_random,
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.stir = NULL,
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.uniform = NULL,
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.buf = randombytes_esp32_random_buf,
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.close = NULL,
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};
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