providers/implementations/include/prov/seeding.h

   1 /*
   2  * Copyright 2020 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the Apache License 2.0 (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 #include "prov/rand_pool.h"
  11
  12 /* Hardware-based seeding functions. */
  13 size_t prov_acquire_entropy_from_tsc(RAND_POOL *pool);
  14 size_t prov_acquire_entropy_from_cpu(RAND_POOL *pool);
  15
  16 /* DRBG entropy callbacks. */
  17 size_t prov_drbg_get_additional_data(RAND_POOL *pool, unsigned char **pout);
  18
  19 void prov_drbg_cleanup_additional_data(RAND_POOL *pool, unsigned char *out);
  20
  21 size_t prov_pool_acquire_entropy(RAND_POOL *pool);
  22 int prov_pool_add_nonce_data(RAND_POOL *pool);
  23
  24 /*
  25  * Add some platform specific additional data
  26  *
  27  * This function is platform specific and adds some random noise to the
  28  * additional data used for generating random bytes and for reseeding
  29  * the drbg.
  30  *
  31  * Returns 1 on success and 0 on failure.
  32  */
  33 int rand_pool_add_additional_data(RAND_POOL *pool);
  34