1a8e1175bSopenharmony_ci/** 2a8e1175bSopenharmony_ci * \file doc_rng.h 3a8e1175bSopenharmony_ci * 4a8e1175bSopenharmony_ci * \brief Random number generator (RNG) module documentation file. 5a8e1175bSopenharmony_ci */ 6a8e1175bSopenharmony_ci/* 7a8e1175bSopenharmony_ci * 8a8e1175bSopenharmony_ci * Copyright The Mbed TLS Contributors 9a8e1175bSopenharmony_ci * SPDX-License-Identifier: Apache-2.0 10a8e1175bSopenharmony_ci * 11a8e1175bSopenharmony_ci * Licensed under the Apache License, Version 2.0 (the "License"); you may 12a8e1175bSopenharmony_ci * not use this file except in compliance with the License. 13a8e1175bSopenharmony_ci * You may obtain a copy of the License at 14a8e1175bSopenharmony_ci * 15a8e1175bSopenharmony_ci * http://www.apache.org/licenses/LICENSE-2.0 16a8e1175bSopenharmony_ci * 17a8e1175bSopenharmony_ci * Unless required by applicable law or agreed to in writing, software 18a8e1175bSopenharmony_ci * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT 19a8e1175bSopenharmony_ci * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 20a8e1175bSopenharmony_ci * See the License for the specific language governing permissions and 21a8e1175bSopenharmony_ci * limitations under the License. 22a8e1175bSopenharmony_ci */ 23a8e1175bSopenharmony_ci 24a8e1175bSopenharmony_ci/** 25a8e1175bSopenharmony_ci * @addtogroup rng_module Random number generator (RNG) module 26a8e1175bSopenharmony_ci * 27a8e1175bSopenharmony_ci * The Random number generator (RNG) module provides random number 28a8e1175bSopenharmony_ci * generation, see \c mbedtls_ctr_drbg_random(). 29a8e1175bSopenharmony_ci * 30a8e1175bSopenharmony_ci * The block-cipher counter-mode based deterministic random 31a8e1175bSopenharmony_ci * bit generator (CTR_DBRG) as specified in NIST SP800-90. It needs an external 32a8e1175bSopenharmony_ci * source of entropy. For these purposes \c mbedtls_entropy_func() can be used. 33a8e1175bSopenharmony_ci * This is an implementation based on a simple entropy accumulator design. 34a8e1175bSopenharmony_ci * 35a8e1175bSopenharmony_ci * Meaning that there seems to be no practical algorithm that can guess 36a8e1175bSopenharmony_ci * the next bit with a probability larger than 1/2 in an output sequence. 37a8e1175bSopenharmony_ci * 38a8e1175bSopenharmony_ci * This module can be used to generate random numbers. 39a8e1175bSopenharmony_ci */ 40