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/**
* \file config-ccm-psk-tls1_2.h
*
* \brief Minimal configuration for TLS 1.2 with PSK and AES-CCM ciphersuites
*/
/*
* Copyright The Mbed TLS Contributors
* 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.
*/
/*
* Minimal configuration for TLS 1.2 with PSK and AES-CCM ciphersuites
* Distinguishing features:
* - no bignum, no PK, no X509
* - fully modern and secure (provided the pre-shared keys have high entropy)
* - very low record overhead with CCM-8
* - optimized for low RAM usage
*
* See README.txt for usage instructions.
*/
#ifndef MBEDTLS_CONFIG_H
#define MBEDTLS_CONFIG_H
/* System support */
//#define MBEDTLS_HAVE_TIME /* Optionally used in Hello messages */
/* Other MBEDTLS_HAVE_XXX flags irrelevant for this configuration */
/* mbed TLS feature support */
#define MBEDTLS_KEY_EXCHANGE_PSK_ENABLED
#define MBEDTLS_SSL_PROTO_TLS1_2
/* mbed TLS modules */
#define MBEDTLS_AES_C
#define MBEDTLS_CCM_C
#define MBEDTLS_CIPHER_C
#define MBEDTLS_CTR_DRBG_C
#define MBEDTLS_ENTROPY_C
#define MBEDTLS_MD_C
#define MBEDTLS_NET_C
#define MBEDTLS_SHA256_C
#define MBEDTLS_SSL_CLI_C
#define MBEDTLS_SSL_SRV_C
#define MBEDTLS_SSL_TLS_C
/* Save RAM at the expense of ROM */
#define MBEDTLS_AES_ROM_TABLES
/* Save some RAM by adjusting to your exact needs */
#define MBEDTLS_PSK_MAX_LEN 16 /* 128-bits keys are generally enough */
/*
* You should adjust this to the exact number of sources you're using: default
* is the "platform_entropy_poll" source, but you may want to add other ones
* Minimum is 2 for the entropy test suite.
*/
#define MBEDTLS_ENTROPY_MAX_SOURCES 2
/*
* Use only CCM_8 ciphersuites, and
* save ROM and a few bytes of RAM by specifying our own ciphersuite list
*/
#define MBEDTLS_SSL_CIPHERSUITES \
MBEDTLS_TLS_PSK_WITH_AES_256_CCM_8, \
MBEDTLS_TLS_PSK_WITH_AES_128_CCM_8
/*
* Save RAM at the expense of interoperability: do this only if you control
* both ends of the connection! (See comments in "mbedtls/ssl.h".)
* The optimal size here depends on the typical size of records.
*/
#define MBEDTLS_SSL_MAX_CONTENT_LEN 1024
#include "mbedtls/check_config.h"
#endif /* MBEDTLS_CONFIG_H */
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