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31 lines
476 B
C
31 lines
476 B
C
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/*
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* SPDX-FileCopyrightText: 2023 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 <errno.h>
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int getentropy(void *buffer, size_t length)
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{
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ssize_t ret;
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if (buffer == NULL) {
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errno = EFAULT;
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return -1;
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}
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if (length > 256) {
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errno = EIO;
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return -1;
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}
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ret = getrandom(buffer, length, 0);
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if (ret == -1) {
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return -1;
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}
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return 0;
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}
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