1/**
2 * \file config-suite-b.h
3 *
4 * \brief Minimal configuration for TLS NSA Suite B Profile (RFC 6460)
5 */
6/*
7 *  Copyright The Mbed TLS Contributors
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/*
23 * Minimal configuration for TLS NSA Suite B Profile (RFC 6460)
24 *
25 * Distinguishing features:
26 * - no RSA or classic DH, fully based on ECC
27 * - optimized for low RAM usage
28 *
29 * Possible improvements:
30 * - if 128-bit security is enough, disable secp384r1 and SHA-512
31 * - use embedded certs in DER format and disable PEM_PARSE_C and BASE64_C
32 *
33 * See README.txt for usage instructions.
34 */
35
36/* System support */
37#define MBEDTLS_HAVE_ASM
38#define MBEDTLS_HAVE_TIME
39
40/* mbed TLS feature support */
41#define MBEDTLS_ECP_DP_SECP256R1_ENABLED
42#define MBEDTLS_ECP_DP_SECP384R1_ENABLED
43#define MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED
44#define MBEDTLS_SSL_PROTO_TLS1_2
45
46/* mbed TLS modules */
47#define MBEDTLS_AES_C
48#define MBEDTLS_ASN1_PARSE_C
49#define MBEDTLS_ASN1_WRITE_C
50#define MBEDTLS_BIGNUM_C
51#define MBEDTLS_CIPHER_C
52#define MBEDTLS_CTR_DRBG_C
53#define MBEDTLS_ECDH_C
54#define MBEDTLS_ECDSA_C
55#define MBEDTLS_ECP_C
56#define MBEDTLS_ENTROPY_C
57#define MBEDTLS_GCM_C
58#define MBEDTLS_MD_C
59#define MBEDTLS_NET_C
60#define MBEDTLS_OID_C
61#define MBEDTLS_PK_C
62#define MBEDTLS_PK_PARSE_C
63#define MBEDTLS_SHA256_C
64#define MBEDTLS_SHA384_C
65#define MBEDTLS_SHA512_C
66#define MBEDTLS_SSL_CLI_C
67#define MBEDTLS_SSL_SRV_C
68#define MBEDTLS_SSL_TLS_C
69#define MBEDTLS_X509_CRT_PARSE_C
70#define MBEDTLS_X509_USE_C
71
72/* For test certificates */
73#define MBEDTLS_BASE64_C
74#define MBEDTLS_PEM_PARSE_C
75
76/* Save RAM at the expense of ROM */
77#define MBEDTLS_AES_ROM_TABLES
78
79/* Save RAM by adjusting to our exact needs */
80#define MBEDTLS_MPI_MAX_SIZE    48 // 384-bit EC curve = 48 bytes
81
82/* Save RAM at the expense of speed, see ecp.h */
83#define MBEDTLS_ECP_WINDOW_SIZE        2
84#define MBEDTLS_ECP_FIXED_POINT_OPTIM  0
85
86/* Significant speed benefit at the expense of some ROM */
87#define MBEDTLS_ECP_NIST_OPTIM
88
89/*
90 * You should adjust this to the exact number of sources you're using: default
91 * is the "mbedtls_platform_entropy_poll" source, but you may want to add other ones.
92 * Minimum is 2 for the entropy test suite.
93 */
94#define MBEDTLS_ENTROPY_MAX_SOURCES 2
95
96/* Save ROM and a few bytes of RAM by specifying our own ciphersuite list */
97#define MBEDTLS_SSL_CIPHERSUITES                        \
98    MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,    \
99    MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
100
101/*
102 * Save RAM at the expense of interoperability: do this only if you control
103 * both ends of the connection!  (See comments in "mbedtls/ssl.h".)
104 * The minimum size here depends on the certificate chain used as well as the
105 * typical size of records.
106 */
107#define MBEDTLS_SSL_IN_CONTENT_LEN             1024
108#define MBEDTLS_SSL_OUT_CONTENT_LEN             1024
109
110/* These defines are present so that the config modifying scripts can enable
111 * them during tests/scripts/test-ref-configs.pl */
112//#define MBEDTLS_USE_PSA_CRYPTO
113//#define MBEDTLS_PSA_CRYPTO_C
114
115/* Error messages and TLS debugging traces
116 * (huge code size increase, needed for tests/ssl-opt.sh) */
117//#define MBEDTLS_DEBUG_C
118//#define MBEDTLS_ERROR_C
119