rand.h 2.1 KB

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  1. #ifndef HEADER_CURL_RAND_H
  2. #define HEADER_CURL_RAND_H
  3. /***************************************************************************
  4. * _ _ ____ _
  5. * Project ___| | | | _ \| |
  6. * / __| | | | |_) | |
  7. * | (__| |_| | _ <| |___
  8. * \___|\___/|_| \_\_____|
  9. *
  10. * Copyright (C) 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. * SPDX-License-Identifier: curl
  24. *
  25. ***************************************************************************/
  26. /*
  27. * Curl_rand() stores 'num' number of random unsigned characters in the buffer
  28. * 'rnd' points to.
  29. *
  30. * If libcurl is built without TLS support or with a TLS backend that lacks a
  31. * proper random API (Gskit or mbedTLS), this function will use "weak" random.
  32. *
  33. * When built *with* TLS support and a backend that offers strong random, it
  34. * will return error if it cannot provide strong random values.
  35. *
  36. * NOTE: 'data' may be passed in as NULL when coming from external API without
  37. * easy handle!
  38. *
  39. */
  40. CURLcode Curl_rand(struct Curl_easy *data, unsigned char *rnd, size_t num);
  41. /*
  42. * Curl_rand_hex() fills the 'rnd' buffer with a given 'num' size with random
  43. * hexadecimal digits PLUS a null-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. #ifdef WIN32
  49. /* Random generator shared between the Schannel vtls and Curl_rand*()
  50. functions */
  51. CURLcode Curl_win32_random(unsigned char *entropy, size_t length);
  52. #endif
  53. #endif /* HEADER_CURL_RAND_H */