1 /* 2 * Copyright 2020-2021 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/provider_ctx.h" 11 #include "crypto/rand_pool.h" 12 13 /* Hardware-based seeding functions. */ 14 size_t ossl_prov_acquire_entropy_from_tsc(RAND_POOL *pool); 15 size_t ossl_prov_acquire_entropy_from_cpu(RAND_POOL *pool); 16 17 /* 18 * Add some platform specific additional data 19 * 20 * This function is platform specific and adds some random noise to the 21 * additional data used for generating random bytes and for reseeding 22 * the drbg. 23 * 24 * Returns 1 on success and 0 on failure. 25 */ 26 int ossl_rand_pool_add_additional_data(RAND_POOL *pool); 27 28 /* 29 * External seeding functions from the core dispatch table. 30 */ 31 int ossl_prov_seeding_from_dispatch(const OSSL_DISPATCH *fns); 32 33 size_t ossl_prov_get_entropy(PROV_CTX *prov_ctx, unsigned char **pout, 34 int entropy, size_t min_len, size_t max_len); 35 void ossl_prov_cleanup_entropy(PROV_CTX *prov_ctx, unsigned char *buf, 36 size_t len); 37 size_t ossl_prov_get_nonce(PROV_CTX *prov_ctx, unsigned char **pout, 38 size_t min_len, size_t max_len, 39 const void *salt, size_t salt_len); 40 void ossl_prov_cleanup_nonce(PROV_CTX *prov_ctx, unsigned char *buf, 41 size_t len); 42