text: /**
   * \file config-suite-b.h
   *
   * \brief Minimal configuration for TLS NSA Suite B Profile (RFC 6460)
   */
  /*
   *  Copyright The Mbed TLS Contributors
   *  SPDX-License-Identifier: Apache-2.0
   *
   *  Licensed under the Apache License, Version 2.0 (the "License"); you may
   *  not use this file except in compliance with the License.
   *  You may obtain a copy of the License at
   *
   *  http://www.apache.org/licenses/LICENSE-2.0
   *
   *  Unless required by applicable law or agreed to in writing, software
   *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
   *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   *  See the License for the specific language governing permissions and
   *  limitations under the License.
   */
  /*
   * Minimal configuration for TLS NSA Suite B Profile (RFC 6460)
   *
   * Distinguishing features:
   * - no RSA or classic DH, fully based on ECC
   * - optimized for low RAM usage
   *
   * Possible improvements:
   * - if 128-bit security is enough, disable secp384r1 and SHA-512
   * - use embedded certs in DER format and disable PEM_PARSE_C and BASE64_C
   *
   * See README.txt for usage instructions.
   */
  
  /* System support */
  #define MBEDTLS_HAVE_ASM
  #define MBEDTLS_HAVE_TIME
  
  /* mbed TLS feature support */
  #define MBEDTLS_ECP_DP_SECP256R1_ENABLED
  #define MBEDTLS_ECP_DP_SECP384R1_ENABLED
  #define MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED
  #define MBEDTLS_SSL_PROTO_TLS1_2
  
  /* mbed TLS modules */
  #define MBEDTLS_AES_C
  #define MBEDTLS_ASN1_PARSE_C
  #define MBEDTLS_ASN1_WRITE_C
  #define MBEDTLS_BIGNUM_C
  #define MBEDTLS_CIPHER_C
  #define MBEDTLS_CTR_DRBG_C
  #define MBEDTLS_ECDH_C
  #define MBEDTLS_ECDSA_C
  #define MBEDTLS_ECP_C
  #define MBEDTLS_ENTROPY_C
  #define MBEDTLS_GCM_C
  #define MBEDTLS_MD_C
  #define MBEDTLS_NET_C
  #define MBEDTLS_OID_C
  #define MBEDTLS_PK_C
  #define MBEDTLS_PK_PARSE_C
  /* The library does not currently support enabling SHA-224 without SHA-256.
   * A future version of the library will have this option disabled
   * by default. */
  #define MBEDTLS_SHA224_C
  #define MBEDTLS_SHA256_C
  #define MBEDTLS_SHA384_C
  #define MBEDTLS_SHA512_C
  #define MBEDTLS_SSL_CLI_C
  #define MBEDTLS_SSL_SRV_C
  #define MBEDTLS_SSL_TLS_C
  #define MBEDTLS_X509_CRT_PARSE_C
  #define MBEDTLS_X509_USE_C
  
  /* For test certificates */
  #define MBEDTLS_BASE64_C
  #define MBEDTLS_PEM_PARSE_C
  
  /* Save RAM at the expense of ROM */
  #define MBEDTLS_AES_ROM_TABLES
  
  /* Save RAM by adjusting to our exact needs */
  #define MBEDTLS_MPI_MAX_SIZE    48 // 384-bit EC curve = 48 bytes
  
  /* Save RAM at the expense of speed, see ecp.h */
  #define MBEDTLS_ECP_WINDOW_SIZE        2
  #define MBEDTLS_ECP_FIXED_POINT_OPTIM  0
  
  /* Significant speed benefit at the expense of some ROM */
  #define MBEDTLS_ECP_NIST_OPTIM
  
  /*
   * You should adjust this to the exact number of sources you're using: default
   * is the "mbedtls_platform_entropy_poll" source, but you may want to add other ones.
   * Minimum is 2 for the entropy test suite.
   */
  #define MBEDTLS_ENTROPY_MAX_SOURCES 2
  
  /* Save ROM and a few bytes of RAM by specifying our own ciphersuite list */
  #define MBEDTLS_SSL_CIPHERSUITES                        \
      MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,    \
      MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
  
  /*
   * Save RAM at the expense of interoperability: do this only if you control
   * both ends of the connection!  (See comments in "mbedtls/ssl.h".)
   * The minimum size here depends on the certificate chain used as well as the
   * typical size of records.
   */
  #define MBEDTLS_SSL_IN_CONTENT_LEN             1024
  #define MBEDTLS_SSL_OUT_CONTENT_LEN             1024
  
  /* These defines are present so that the config modifying scripts can enable
   * them during tests/scripts/test-ref-configs.pl */
  //#define MBEDTLS_USE_PSA_CRYPTO
  //#define MBEDTLS_PSA_CRYPTO_C
  
  /* Error messages and TLS debugging traces
   * (huge code size increase, needed for tests/ssl-opt.sh) */
  //#define MBEDTLS_DEBUG_C
  //#define MBEDTLS_ERROR_C
  