1 #ifndef HEADER_CURL_RAND_H
2 #define HEADER_CURL_RAND_H
3 /***************************************************************************
4  *                                  _   _ ____  _
5  *  Project                     ___| | | |  _ \| |
6  *                             / __| | | | |_) | |
7  *                            | (__| |_| |  _ <| |___
8  *                             \___|\___/|_| \_\_____|
9  *
10  * Copyright (C) 1998 - 2020, Daniel Stenberg, <daniel@haxx.se>, et al.
11  *
12  * This software is licensed as described in the file COPYING, which
13  * you should have received as part of this distribution. The terms
14  * are also available at https://curl.se/docs/copyright.html.
15  *
16  * You may opt to use, copy, modify, merge, publish, distribute and/or sell
17  * copies of the Software, and permit persons to whom the Software is
18  * furnished to do so, under the terms of the COPYING file.
19  *
20  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
21  * KIND, either express or implied.
22  *
23  ***************************************************************************/
24 
25 /*
26  * Curl_rand() stores 'num' number of random unsigned characters in the buffer
27  * 'rnd' points to.
28  *
29  * If libcurl is built without TLS support or with a TLS backend that lacks a
30  * proper random API (Gskit or mbedTLS), this function will use "weak" random.
31  *
32  * When built *with* TLS support and a backend that offers strong random, it
33  * will return error if it cannot provide strong random values.
34  *
35  * NOTE: 'data' may be passed in as NULL when coming from external API without
36  * easy handle!
37  *
38  */
39 CURLcode Curl_rand(struct Curl_easy *data, unsigned char *rnd, size_t num);
40 
41 /*
42  * Curl_rand_hex() fills the 'rnd' buffer with a given 'num' size with random
43  * hexadecimal digits PLUS a zero terminating byte. It must be an odd number
44  * size.
45  */
46 CURLcode Curl_rand_hex(struct Curl_easy *data, unsigned char *rnd,
47                        size_t num);
48 
49 #endif /* HEADER_CURL_RAND_H */
50