mbed TLS Build
Dependents: Encrypt_Decrypt1 mbed_blink_tls encrypt encrypt
Diff: doxygen/input/doc_rng.h
- Revision:
- 0:cdf462088d13
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/doxygen/input/doc_rng.h Thu Jan 05 00:18:44 2017 +0000 @@ -0,0 +1,43 @@ +/** + * @file + * Random number generator (RNG) module documentation file. + * + * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved + * SPDX-License-Identifier: Apache-2.0 + * + * Licensed under the Apache License, Version 2.0 (the "License"); you may + * not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT + * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + * This file is part of mbed TLS (https://tls.mbed.org) + */ + +/** + * @addtogroup rng_module Random number generator (RNG) module + * + * The Random number generator (RNG) module provides random number + * generation, see \c mbedtls_ctr_drbg_random(). + * + * The block-cipher counter-mode based deterministic random + * bit generator (CTR_DBRG) as specified in NIST SP800-90. It needs an external + * source of entropy. For these purposes \c mbedtls_entropy_func() can be used. + * This is an implementation based on a simple entropy accumulator design. + * + * The other number generator that is included is less strong and uses the + * HAVEGE (HArdware Volatile Entropy Gathering and Expansion) software heuristic + * which considered unsafe for primary usage, but provides additional random + * to the entropy pool if enables. + * + * Meaning that there seems to be no practical algorithm that can guess + * the next bit with a probability larger than 1/2 in an output sequence. + * + * This module can be used to generate random numbers. + */