2 * Minimal configuration for TLS 1.2 with PSK and AES-CCM ciphersuites
4 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
5 * SPDX-License-Identifier: Apache-2.0
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
11 * http://www.apache.org/licenses/LICENSE-2.0
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.
19 * This file is part of mbed TLS (https://tls.mbed.org)
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
29 * See README.txt for usage instructions.
31 #ifndef MBEDTLS_CONFIG_H
32 #define MBEDTLS_CONFIG_H
35 //#define MBEDTLS_HAVE_TIME /* Optionally used in Hello messages */
36 /* Other MBEDTLS_HAVE_XXX flags irrelevant for this configuration */
38 /* mbed TLS feature support */
39 #define MBEDTLS_KEY_EXCHANGE_PSK_ENABLED
40 #define MBEDTLS_SSL_PROTO_TLS1_2
42 /* mbed TLS modules */
45 #define MBEDTLS_CIPHER_C
46 #define MBEDTLS_CTR_DRBG_C
47 #define MBEDTLS_ENTROPY_C
50 #define MBEDTLS_SHA256_C
51 #define MBEDTLS_SSL_CLI_C
52 #define MBEDTLS_SSL_SRV_C
53 #define MBEDTLS_SSL_TLS_C
55 /* Save RAM at the expense of ROM */
56 #define MBEDTLS_AES_ROM_TABLES
58 /* Save some RAM by adjusting to your exact needs */
59 #define MBEDTLS_PSK_MAX_LEN 16 /* 128-bits keys are generally enough */
62 * You should adjust this to the exact number of sources you're using: default
63 * is the "platform_entropy_poll" source, but you may want to add other ones
64 * Minimum is 2 for the entropy test suite.
66 #define MBEDTLS_ENTROPY_MAX_SOURCES 2
69 * Use only CCM_8 ciphersuites, and
70 * save ROM and a few bytes of RAM by specifying our own ciphersuite list
72 #define MBEDTLS_SSL_CIPHERSUITES \
73 MBEDTLS_TLS_PSK_WITH_AES_256_CCM_8, \
74 MBEDTLS_TLS_PSK_WITH_AES_128_CCM_8
77 * Save RAM at the expense of interoperability: do this only if you control
78 * both ends of the connection! (See comments in "mbedtls/ssl.h".)
79 * The optimal size here depends on the typical size of records.
81 #define MBEDTLS_SSL_MAX_CONTENT_LEN 512
83 #include "mbedtls/check_config.h"
85 #endif /* MBEDTLS_CONFIG_H */