forked from espressif/esp-idf
Ashish Sharma
67 lines
1.8 KiB
C
67 lines
1.8 KiB
C
/*
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* SPDX-FileCopyrightText: 2021-2025 Espressif Systems (Shanghai) CO LTD
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <mbedtls/build_info.h>
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#include <sys/types.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include "esp_random.h"
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#include "mbedtls/esp_mbedtls_random.h"
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#if defined(MBEDTLS_PLATFORM_GET_ENTROPY_ALT)
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#include "psa/crypto.h"
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#endif
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#include <entropy_poll.h>
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#ifndef MBEDTLS_ENTROPY_HARDWARE_ALT
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#error "MBEDTLS_ENTROPY_HARDWARE_ALT should always be set in ESP-IDF"
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#endif
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int mbedtls_hardware_poll( void *data,
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unsigned char *output, size_t len, size_t *olen )
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{
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esp_fill_random(output, len);
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*olen = len;
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return 0;
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}
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int mbedtls_esp_random(void *ctx, unsigned char *buf, size_t len)
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{
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(void) ctx; // unused
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esp_fill_random(buf, len);
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return 0;
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}
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#if defined(MBEDTLS_PLATFORM_GET_ENTROPY_ALT)
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int mbedtls_platform_get_entropy(unsigned char *output, size_t output_size,
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size_t *output_len, size_t *entropy_content);
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psa_status_t mbedtls_psa_external_get_random(
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mbedtls_psa_external_random_context_t *context,
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uint8_t *output, size_t output_size, size_t *output_length)
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{
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if (context == NULL || output == NULL || output_length == NULL) {
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return PSA_ERROR_INVALID_ARGUMENT;
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}
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esp_fill_random(output, output_size);
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*output_length = output_size;
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return PSA_SUCCESS;
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}
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int mbedtls_platform_get_entropy(unsigned char *output, size_t output_size,
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size_t *output_len, size_t *entropy_content)
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{
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if (output == NULL || output_size == 0 || output_len == NULL || entropy_content == NULL) {
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return -1;
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}
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esp_fill_random(output, output_size);
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*output_len = output_size;
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*entropy_content = 8 * output_size;
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return 0;
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}
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#endif // MBEDTLS_PLATFORM_GET_ENTROPY_ALT
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