mirror of
https://github.com/guanzhi/GmSSL.git
synced 2026-05-06 16:36:16 +08:00
47 lines
785 B
C
47 lines
785 B
C
/*
|
|
* Copyright 2014-2022 The GmSSL Project. All Rights Reserved.
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the License); you may
|
|
* not use this file except in compliance with the License.
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*/
|
|
|
|
|
|
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <stdlib.h>
|
|
#include <gmssl/rand.h>
|
|
#include <gmssl/error.h>
|
|
|
|
#define RAND_MAX_BUF_SIZE 4096
|
|
|
|
int rand_bytes(uint8_t *buf, size_t len)
|
|
{
|
|
FILE *fp;
|
|
if (!buf) {
|
|
error_print();
|
|
return -1;
|
|
}
|
|
if (len > RAND_MAX_BUF_SIZE) {
|
|
error_print();
|
|
return -1;
|
|
}
|
|
if (!len) {
|
|
return 0;
|
|
}
|
|
|
|
if (!(fp = fopen("/dev/urandom", "rb"))) {
|
|
error_print();
|
|
return -1;
|
|
}
|
|
if (fread(buf, 1, len, fp) != len) {
|
|
error_print();
|
|
fclose(fp);
|
|
return -1;
|
|
}
|
|
fclose(fp);
|
|
return 1;
|
|
}
|