kopia lustrzana https://github.com/espressif/esp-idf
36 wiersze
896 B
C
36 wiersze
896 B
C
/*
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* SPDX-FileCopyrightText: 2018-2022 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 <sys/random.h>
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#include <sys/param.h>
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#include <assert.h>
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#include <errno.h>
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#include <string.h>
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#include "esp_random.h"
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#include "esp_log.h"
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static const char *TAG = "RANDOM";
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ssize_t getrandom(void *buf, size_t buflen, unsigned int flags)
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{
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// Flags are ignored because:
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// - esp_random is non-blocking so it works for both blocking and non-blocking calls,
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// - don't have opportunity so set som other source of entropy.
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ESP_LOGD(TAG, "getrandom(buf=0x%x, buflen=%d, flags=%u)", (int) buf, buflen, flags);
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if (buf == NULL) {
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errno = EFAULT;
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ESP_LOGD(TAG, "getrandom returns -1 (EFAULT)");
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return -1;
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}
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esp_fill_random(buf, buflen);
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ESP_LOGD(TAG, "getrandom returns %d", buflen);
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return buflen;
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}
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