mbedtls_entropy_config.h

00001 /*
00002  *  Copyright (C) 2006-2016, ARM Limited, All Rights Reserved
00003  *  SPDX-License-Identifier: Apache-2.0
00004  *
00005  *  Licensed under the Apache License, Version 2.0 (the "License"); you may
00006  *  not use this file except in compliance with the License.
00007  *  You may obtain a copy of the License at
00008  *
00009  *  http://www.apache.org/licenses/LICENSE-2.0
00010  *
00011  *  Unless required by applicable law or agreed to in writing, software
00012  *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
00013  *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00014  *  See the License for the specific language governing permissions and
00015  *  limitations under the License.
00016  *
00017  *  This file is part of mbed TLS (https://tls.mbed.org)
00018  */
00019 #ifndef __MBEDTLS_ENTROPY_H__
00020 #define __MBEDTLS_ENTROPY_H__
00021 
00022 /* Enable entropy for K64F and K22F. This means entropy is disabled for all other targets. */
00023 /* Do **NOT** deploy this code in production on other targets! */
00024 /* See https://tls.mbed.org/kb/how-to/add-entropy-sources-to-entropy-pool */
00025 #if defined(TARGET_K64F) || defined(TARGET_K22F) || defined(TARGET_NUCLEO_L476RG)
00026 #undef MBEDTLS_NO_DEFAULT_ENTROPY_SOURCES
00027 #undef MBEDTLS_TEST_NULL_ENTROPY
00028 #endif
00029 
00030 #if !defined(MBEDTLS_ENTROPY_HARDWARE_ALT) && \
00031     !defined(MBEDTLS_ENTROPY_NV_SEED) && !defined(MBEDTLS_TEST_NULL_ENTROPY)
00032 #error "This hardware does not have an entropy source."
00033 #endif /* !MBEDTLS_ENTROPY_HARDWARE_ALT && !MBEDTLS_ENTROPY_NV_SEED &&
00034         * !MBEDTLS_TEST_NULL_ENTROPY */
00035 
00036 #if !defined(MBEDTLS_SHA1_C)
00037 #define MBEDTLS_SHA1_C
00038 #endif /* !MBEDTLS_SHA1_C */
00039 
00040 /*
00041  *  This value is sufficient for handling 2048 bit RSA keys.
00042  *
00043  *  Set this value higher to enable handling larger keys, but be aware that this
00044  *  will increase the stack usage.
00045  */
00046 #define MBEDTLS_MPI_MAX_SIZE        256
00047 
00048 #define MBEDTLS_MPI_WINDOW_SIZE     1
00049 
00050 #endif