1 /** 2 * \file config-ccm-psk-tls1_2.h 3 * 4 * \brief Minimal configuration for TLS 1.2 with PSK and AES-CCM ciphersuites 5 */ 6 /* 7 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved 8 * SPDX-License-Identifier: Apache-2.0 9 * 10 * Licensed under the Apache License, Version 2.0 (the "License"); you may 11 * not use this file except in compliance with the License. 12 * You may obtain a copy of the License at 13 * 14 * http://www.apache.org/licenses/LICENSE-2.0 15 * 16 * Unless required by applicable law or agreed to in writing, software 17 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT 18 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 19 * See the License for the specific language governing permissions and 20 * limitations under the License. 21 * 22 * This file is part of mbed TLS (https://tls.mbed.org) 23 */ 24 /* 25 * Minimal configuration for TLS 1.2 with PSK and AES-CCM ciphersuites 26 * Distinguishing features: 27 * - no bignum, no PK, no X509 28 * - fully modern and secure (provided the pre-shared keys have high entropy) 29 * - very low record overhead with CCM-8 30 * - optimized for low RAM usage 31 * 32 * See README.txt for usage instructions. 33 */ 34 #ifndef MBEDTLS_CONFIG_H 35 #define MBEDTLS_CONFIG_H 36 37 /* System support */ 38 //#define MBEDTLS_HAVE_TIME /* Optionally used in Hello messages */ 39 /* Other MBEDTLS_HAVE_XXX flags irrelevant for this configuration */ 40 41 /* mbed TLS feature support */ 42 #define MBEDTLS_KEY_EXCHANGE_PSK_ENABLED 43 #define MBEDTLS_SSL_PROTO_TLS1_2 44 45 /* mbed TLS modules */ 46 #define MBEDTLS_AES_C 47 #define MBEDTLS_CCM_C 48 #define MBEDTLS_CIPHER_C 49 #define MBEDTLS_CTR_DRBG_C 50 #define MBEDTLS_ENTROPY_C 51 #define MBEDTLS_MD_C 52 #define MBEDTLS_NET_C 53 #define MBEDTLS_SHA256_C 54 #define MBEDTLS_SSL_CLI_C 55 #define MBEDTLS_SSL_SRV_C 56 #define MBEDTLS_SSL_TLS_C 57 58 /* Save RAM at the expense of ROM */ 59 #define MBEDTLS_AES_ROM_TABLES 60 61 /* Save some RAM by adjusting to your exact needs */ 62 #define MBEDTLS_PSK_MAX_LEN 16 /* 128-bits keys are generally enough */ 63 64 /* 65 * You should adjust this to the exact number of sources you're using: default 66 * is the "platform_entropy_poll" source, but you may want to add other ones 67 * Minimum is 2 for the entropy test suite. 68 */ 69 #define MBEDTLS_ENTROPY_MAX_SOURCES 2 70 71 /* 72 * Use only CCM_8 ciphersuites, and 73 * save ROM and a few bytes of RAM by specifying our own ciphersuite list 74 */ 75 #define MBEDTLS_SSL_CIPHERSUITES \ 76 MBEDTLS_TLS_PSK_WITH_AES_256_CCM_8, \ 77 MBEDTLS_TLS_PSK_WITH_AES_128_CCM_8 78 79 /* 80 * Save RAM at the expense of interoperability: do this only if you control 81 * both ends of the connection! (See comments in "mbedtls/ssl.h".) 82 * The optimal size here depends on the typical size of records. 83 */ 84 #define MBEDTLS_SSL_MAX_CONTENT_LEN 1024 85 86 #include "mbedtls/check_config.h" 87 88 #endif /* MBEDTLS_CONFIG_H */ 89