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check_config.h: make TLS1.3 requirements verification more readable

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Signed-off-by: Przemek Stekiel <przemyslaw.stekiel@mobica.com>
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Przemek Stekiel 2022-09-12 13:24:25 +02:00 committed by Przemyslaw Stekiel
parent 0852ef8b96
commit ce0aa58fd9
1 changed files with 14 additions and 4 deletions
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18
include/mbedtls/check_config.h
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@ -757,11 +757,21 @@
#endif
/* TLS 1.3 requires at least one ciphersuite, so at least SHA-256 or SHA-384 */
#if defined(MBEDTLS_SSL_PROTO_TLS1_3) && \
!( ( defined(PSA_WANT_ALG_SHA_256) || defined(PSA_WANT_ALG_SHA_348) ) && \
( defined(MBEDTLS_USE_PSA_CRYPTO) || ( defined(MBEDTLS_MD_C) && ( defined(MBEDTLS_SHA256_C) || defined(MBEDTLS_SHA384_C) ) ) ) )
#if defined(MBEDTLS_SSL_PROTO_TLS1_3)
/* We always need at least one of the hashes via PSA (for use with HKDF) */
#if !( defined(PSA_WANT_ALG_SHA_256) || defined(PSA_WANT_ALG_SHA_384) )
#error "MBEDTLS_SSL_PROTO_TLS1_3 defined, but not all prerequisites"
#endif
#endif /* !(PSA_WANT_ALG_SHA_256 || PSA_WANT_ALG_SHA_384) */
#if !defined(MBEDTLS_USE_PSA_CRYPTO)
/* When USE_PSA_CRYPTO is not defined, we also need SHA-256 or SHA-384 via the
* legacy interface, including via the MD layer, for the parts of the code
* that are shared with TLS 1.2 (running handshake hash). */
#if !defined(MBEDTLS_MD_C) || \
!( defined(MBEDTLS_SHA256_C) || defined(MBEDTLS_SHA384_C) )
#error "MBEDTLS_SSL_PROTO_TLS1_3 defined, but not all prerequisites"
#endif /* !MBEDTLS_MD_C || !(MBEDTLS_SHA256_C || MBEDTLS_SHA384_C) */
#endif /* !MBEDTLS_USE_PSA_CRYPTO */
#endif /* MBEDTLS_SSL_PROTO_TLS1_3 */
/*
* The current implementation of TLS 1.3 requires MBEDTLS_SSL_KEEP_PEER_CERTIFICATE.