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 The Mbed TLS Contributors 8 * SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later 9 */ 10 /* 11 * Minimal configuration for TLS 1.2 with PSK and AES-CCM ciphersuites 12 * 13 * Distinguishing features: 14 * - Optimized for small code size, low bandwidth (on a reliable transport), 15 * and low RAM usage. 16 * - No asymmetric cryptography (no certificates, no Diffie-Hellman key 17 * exchange). 18 * - Fully modern and secure (provided the pre-shared keys are generated and 19 * stored securely). 20 * - Very low record overhead with CCM-8. 21 * 22 * See README.txt for usage instructions. 23 */ 24 25 /* System support */ 26 //#define MBEDTLS_HAVE_TIME /* Optionally used in Hello messages */ 27 /* Other MBEDTLS_HAVE_XXX flags irrelevant for this configuration */ 28 29 /* Mbed TLS modules */ 30 #define MBEDTLS_AES_C 31 #define MBEDTLS_CCM_C 32 #define MBEDTLS_CIPHER_C 33 #define MBEDTLS_CTR_DRBG_C 34 #define MBEDTLS_ENTROPY_C 35 #define MBEDTLS_MD_C 36 #define MBEDTLS_NET_C 37 #define MBEDTLS_SHA256_C 38 #define MBEDTLS_SSL_CLI_C 39 #define MBEDTLS_SSL_SRV_C 40 #define MBEDTLS_SSL_TLS_C 41 42 /* TLS protocol feature support */ 43 #define MBEDTLS_KEY_EXCHANGE_PSK_ENABLED 44 #define MBEDTLS_SSL_PROTO_TLS1_2 45 46 /* 47 * Use only CCM_8 ciphersuites, and 48 * save ROM and a few bytes of RAM by specifying our own ciphersuite list 49 */ 50 #define MBEDTLS_SSL_CIPHERSUITES \ 51 MBEDTLS_TLS_PSK_WITH_AES_256_CCM_8, \ 52 MBEDTLS_TLS_PSK_WITH_AES_128_CCM_8 53 54 /* 55 * Save RAM at the expense of interoperability: do this only if you control 56 * both ends of the connection! (See comments in "mbedtls/ssl.h".) 57 * The optimal size here depends on the typical size of records. 58 */ 59 #define MBEDTLS_SSL_IN_CONTENT_LEN 1024 60 #define MBEDTLS_SSL_OUT_CONTENT_LEN 1024 61 62 /* Save RAM at the expense of ROM */ 63 #define MBEDTLS_AES_ROM_TABLES 64 65 /* Save some RAM by adjusting to your exact needs */ 66 #define MBEDTLS_PSK_MAX_LEN 16 /* 128-bits keys are generally enough */ 67 68 /* 69 * You should adjust this to the exact number of sources you're using: default 70 * is the "platform_entropy_poll" source, but you may want to add other ones 71 * Minimum is 2 for the entropy test suite. 72 */ 73 #define MBEDTLS_ENTROPY_MAX_SOURCES 2 74 75 /* These defines are present so that the config modifying scripts can enable 76 * them during tests/scripts/test-ref-configs.pl */ 77 //#define MBEDTLS_USE_PSA_CRYPTO 78 //#define MBEDTLS_PSA_CRYPTO_C 79 80 /* Error messages and TLS debugging traces 81 * (huge code size increase, needed for tests/ssl-opt.sh) */ 82 //#define MBEDTLS_DEBUG_C 83 //#define MBEDTLS_ERROR_C 84
