1 /* 2 * Minimal configuration for DTLS 1.2 with PSK and AES-CCM ciphersuites 3 * 4 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved 5 * SPDX-License-Identifier: Apache-2.0 6 * 7 * Licensed under the Apache License, Version 2.0 (the "License"); you may 8 * not use this file except in compliance with the License. 9 * You may obtain a copy of the License at 10 * 11 * http://www.apache.org/licenses/LICENSE-2.0 12 * 13 * Unless required by applicable law or agreed to in writing, software 14 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT 15 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 16 * See the License for the specific language governing permissions and 17 * limitations under the License. 18 * 19 * This file is part of mbed TLS (https://tls.mbed.org) 20 */ 21 /* 22 * Minimal configuration for TLS 1.2 with PSK and AES-CCM ciphersuites 23 * Distinguishing features: 24 * - no bignum, no PK, no X509 25 * - fully modern and secure (provided the pre-shared keys have high entropy) 26 * - very low record overhead with CCM-8 27 * - optimized for low RAM usage 28 * 29 * See README.txt for usage instructions. 30 */ 31 #ifndef MBEDTLS_CONFIG_H 32 #define MBEDTLS_CONFIG_H 33 34 /* System support */ 35 #define MBEDTLS_PLATFORM_C 36 #define MBEDTLS_PLATFORM_MEMORY 37 #define MBEDTLS_MEMORY_BUFFER_ALLOC_C 38 #define MBEDTLS_MEMORY_ALIGN_MULTIPLE (sizeof(void *)) 39 #define MBEDTLS_PLATFORM_NO_STD_FUNCTIONS 40 #define MBEDTLS_PLATFORM_EXIT_ALT 41 #define MBEDTLS_NO_PLATFORM_ENTROPY 42 #define MBEDTLS_NO_DEFAULT_ENTROPY_SOURCES 43 #define MBEDTLS_PLATFORM_PRINTF_ALT 44 45 #if defined(CONFIG_MBEDTLS_TEST) 46 #define MBEDTLS_SELF_TEST 47 #define MBEDTLS_DEBUG_C 48 #else 49 #define MBEDTLS_ENTROPY_C 50 #endif 51 52 53 /* mbed TLS feature support */ 54 #define MBEDTLS_KEY_EXCHANGE_PSK_ENABLED 55 #define MBEDTLS_SSL_MAX_FRAGMENT_LENGTH 56 #define MBEDTLS_SSL_PROTO_TLS1_2 57 #define MBEDTLS_SSL_PROTO_DTLS 58 #define MBEDTLS_SSL_DTLS_ANTI_REPLAY 59 #define MBEDTLS_SSL_DTLS_HELLO_VERIFY 60 61 62 /* mbed TLS modules */ 63 #define MBEDTLS_AES_C 64 #define MBEDTLS_CCM_C 65 #define MBEDTLS_CIPHER_C 66 #define MBEDTLS_CTR_DRBG_C 67 #define MBEDTLS_ENTROPY_C 68 #define MBEDTLS_MD_C 69 #define MBEDTLS_SHA224_C 70 #define MBEDTLS_SHA256_C 71 #define MBEDTLS_SSL_COOKIE_C 72 #define MBEDTLS_SSL_CLI_C 73 #define MBEDTLS_SSL_SRV_C 74 #define MBEDTLS_SSL_TLS_C 75 76 /* Save RAM at the expense of ROM */ 77 #define MBEDTLS_AES_ROM_TABLES 78 79 /* Save some RAM by adjusting to your exact needs */ 80 #define MBEDTLS_PSK_MAX_LEN 16 /* 128-bits keys are generally enough */ 81 82 /* 83 * You should adjust this to the exact number of sources you're using: default 84 * is the "platform_entropy_poll" source, but you may want to add other ones 85 * Minimum is 2 for the entropy test suite. 86 */ 87 #define MBEDTLS_ENTROPY_MAX_SOURCES 2 88 89 /* 90 * Use only CCM_8 ciphersuites, and 91 * save ROM and a few bytes of RAM by specifying our own ciphersuite list 92 */ 93 #define MBEDTLS_SSL_CIPHERSUITES MBEDTLS_TLS_PSK_WITH_AES_128_CCM_8 94 95 /* 96 * Allow to save RAM at the expense of interoperability: do this only if you 97 * control both ends of the connection! (See comments in "mbedtls/ssl.h".) 98 * The optimal size here depends on the typical size of records. 99 */ 100 #define MBEDTLS_SSL_MAX_CONTENT_LEN CONFIG_MBEDTLS_SSL_MAX_CONTENT_LEN 101 102 #include "mbedtls/check_config.h" 103 104 #endif /* MBEDTLS_CONFIG_H */ 105
