| 1 | #ifndef HEADER_CURL_RAND_H
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| 2 | #define HEADER_CURL_RAND_H
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| 3 | /***************************************************************************
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| 4 | * _ _ ____ _
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| 5 | * Project ___| | | | _ \| |
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| 6 | * / __| | | | |_) | |
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| 7 | * | (__| |_| | _ <| |___
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| 8 | * \___|\___/|_| \_\_____|
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| 9 | *
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| 10 | * Copyright (C) 1998 - 2022, Daniel Stenberg, <[email protected]>, et al.
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| 11 | *
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| 12 | * This software is licensed as described in the file COPYING, which
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| 13 | * you should have received as part of this distribution. The terms
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| 14 | * are also available at https://curl.se/docs/copyright.html.
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| 15 | *
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| 16 | * You may opt to use, copy, modify, merge, publish, distribute and/or sell
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| 17 | * copies of the Software, and permit persons to whom the Software is
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| 18 | * furnished to do so, under the terms of the COPYING file.
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| 19 | *
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| 20 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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| 21 | * KIND, either express or implied.
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| 22 | *
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| 23 | * SPDX-License-Identifier: curl
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| 24 | *
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| 25 | ***************************************************************************/
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| 26 |
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| 27 | /*
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| 28 | * Curl_rand() stores 'num' number of random unsigned characters in the buffer
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| 29 | * 'rnd' points to.
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| 30 | *
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| 31 | * If libcurl is built without TLS support or with a TLS backend that lacks a
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| 32 | * proper random API (Gskit or mbedTLS), this function will use "weak" random.
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| 33 | *
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| 34 | * When built *with* TLS support and a backend that offers strong random, it
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| 35 | * will return error if it cannot provide strong random values.
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| 36 | *
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| 37 | * NOTE: 'data' may be passed in as NULL when coming from external API without
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| 38 | * easy handle!
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| 39 | *
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| 40 | */
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| 41 | CURLcode Curl_rand(struct Curl_easy *data, unsigned char *rnd, size_t num);
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| 42 |
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| 43 | /*
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| 44 | * Curl_rand_hex() fills the 'rnd' buffer with a given 'num' size with random
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| 45 | * hexadecimal digits PLUS a null-terminating byte. It must be an odd number
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| 46 | * size.
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| 47 | */
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| 48 | CURLcode Curl_rand_hex(struct Curl_easy *data, unsigned char *rnd,
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| 49 | size_t num);
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| 50 |
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| 51 | #ifdef WIN32
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| 52 | /* Random generator shared between the Schannel vtls and Curl_rand*()
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| 53 | functions */
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| 54 | CURLcode Curl_win32_random(unsigned char *entropy, size_t length);
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| 55 | #endif
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| 56 |
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| 57 | #endif /* HEADER_CURL_RAND_H */
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