2 * Copyright 2020 The OpenSSL Project Authors. All Rights Reserved.
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
10 #include "prov/provider_ctx.h"
11 #include "crypto/rand_pool.h"
13 /* Hardware-based seeding functions. */
14 size_t prov_acquire_entropy_from_tsc(RAND_POOL *pool);
15 size_t prov_acquire_entropy_from_cpu(RAND_POOL *pool);
17 /* DRBG entropy callbacks. */
18 size_t prov_drbg_get_additional_data(RAND_POOL *pool, unsigned char **pout);
20 void prov_drbg_cleanup_additional_data(RAND_POOL *pool, unsigned char *out);
23 * Add some platform specific additional data
25 * This function is platform specific and adds some random noise to the
26 * additional data used for generating random bytes and for reseeding
29 * Returns 1 on success and 0 on failure.
31 int rand_pool_add_additional_data(RAND_POOL *pool);
34 * External seeding functions from the core dispatch table.
36 int ossl_prov_seeding_from_dispatch(const OSSL_DISPATCH *fns);
38 size_t ossl_prov_get_entropy(PROV_CTX *prov_ctx, unsigned char **pout,
39 int entropy, size_t min_len, size_t max_len);
40 void ossl_prov_cleanup_entropy(PROV_CTX *prov_ctx, unsigned char *buf,
42 size_t ossl_prov_get_nonce(PROV_CTX *prov_ctx, unsigned char **pout,
43 size_t min_len, size_t max_len,
44 const void *salt, size_t salt_len);
45 void ossl_prov_cleanup_nonce(PROV_CTX *prov_ctx, unsigned char *buf,