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42 lines
784 B
C
42 lines
784 B
C
/*
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* Copyright 2014-2022 The GmSSL Project. All Rights Reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the License); you may
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* not use this file except in compliance with the License.
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*/
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <unistd.h> // in Linux
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#ifdef APPLE
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#include <sys/random.h> // in Apple
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#endif
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#include <gmssl/rand.h>
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#include <gmssl/error.h>
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#define RAND_MAX_BUF_SIZE 256 // requirement of getentropy()
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int rand_bytes(uint8_t *buf, size_t len)
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{
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if (!buf) {
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error_print();
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return -1;
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}
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if (!len || len > RAND_MAX_BUF_SIZE) {
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error_print();
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return -1;
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}
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if (getentropy(buf, len) != 0) {
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error_print();
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return -1;
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}
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return 1;
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}
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