rand.h revision d9e397b599b13d642138480a28c14db7a136bf05 
1/* Copyright (c) 2014, Google Inc.
2 *
3 * Permission to use, copy, modify, and/or distribute this software for any
4 * purpose with or without fee is hereby granted, provided that the above
5 * copyright notice and this permission notice appear in all copies.
6 *
7 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
8 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
9 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
10 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
11 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
12 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
13 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
14
15#ifndef OPENSSL_HEADER_RAND_H
16#define OPENSSL_HEADER_RAND_H
17
18#include <openssl/base.h>
19
20#if defined(__cplusplus)
21extern "C" {
22#endif
23
24
25/* RAND_bytes writes |len| bytes of random data to |buf|. It returns one on
26 * success and zero on otherwise. */
27OPENSSL_EXPORT int RAND_bytes(uint8_t *buf, size_t len);
28
29/* RAND_cleanup frees any resources used by the RNG. This is not safe if other
30 * threads might still be calling |RAND_bytes|. */
31OPENSSL_EXPORT void RAND_cleanup(void);
32
33
34/* Deprecated functions */
35
36/* RAND_pseudo_bytes is a wrapper around |RAND_bytes|. */
37OPENSSL_EXPORT int RAND_pseudo_bytes(uint8_t *buf, size_t len);
38
39/* RAND_seed does nothing. */
40OPENSSL_EXPORT void RAND_seed(const void *buf, int num);
41
42/* RAND_add does nothing. */
43OPENSSL_EXPORT void RAND_add(const void *buf, int num, double entropy);
44
45/* RAND_poll returns one. */
46OPENSSL_EXPORT int RAND_poll(void);
47
48
49#if defined(__cplusplus)
50}  /* extern C */
51#endif
52
53#endif  /* OPENSSL_HEADER_RAND_H */
54