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Factor repeated preprocessor condition to a macro

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The condition is a complex and repeated a few times. There were already some
inconsistencies in the repetitions as some of them forgot about DES.

Signed-off-by: Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com>
This commit is contained in:
Manuel Pégourié-Gonnard 2020-07-28 09:55:33 +02:00
parent 22b265b9f2
commit 8ebb88d1e0
2 changed files with 13 additions and 10 deletions
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8
include/mbedtls/ssl_internal.h
View file

@ -144,6 +144,14 @@
#define MBEDTLS_SSL_RETRANS_WAITING 2
#define MBEDTLS_SSL_RETRANS_FINISHED 3
/* For CBC-specific encrypt/decrypt code */
#if defined(MBEDTLS_CIPHER_MODE_CBC) && \
( defined(MBEDTLS_AES_C) || \
defined(MBEDTLS_CAMELLIA_C) || \
defined(MBEDTLS_DES_C) )
#define MBEDTLS_SSL_SOME_SUITES_USE_CBC
#endif
/*
* Allow extra bytes for record, authentication and encryption overhead:
* counter (8) + header (5) + IV(16) + MAC (16-48) + padding (0-256)

15
library/ssl_tls.c
View file

@ -1301,8 +1301,7 @@ static void ssl_mac( mbedtls_md_context_t *md_ctx,
#endif /* MBEDTLS_SSL_PROTO_SSL3 */
#if defined(MBEDTLS_ARC4_C) || defined(MBEDTLS_CIPHER_NULL_CIPHER) || \
( defined(MBEDTLS_CIPHER_MODE_CBC) && \
( defined(MBEDTLS_AES_C) || defined(MBEDTLS_CAMELLIA_C) ) )
defined(MBEDTLS_SSL_SOME_SUITES_USE_CBC)
#define SSL_SOME_MODES_USE_MAC
#endif
@ -1523,8 +1522,7 @@ static int ssl_encrypt_buf( mbedtls_ssl_context *ssl )
}
else
#endif /* MBEDTLS_GCM_C || MBEDTLS_CCM_C */
#if defined(MBEDTLS_CIPHER_MODE_CBC) && \
( defined(MBEDTLS_AES_C) || defined(MBEDTLS_CAMELLIA_C) )
#if defined(MBEDTLS_SSL_SOME_SUITES_USE_CBC)
if( mode == MBEDTLS_MODE_CBC )
{
int ret;
@ -1643,8 +1641,7 @@ static int ssl_encrypt_buf( mbedtls_ssl_context *ssl )
#endif /* MBEDTLS_SSL_ENCRYPT_THEN_MAC */
}
else
#endif /* MBEDTLS_CIPHER_MODE_CBC &&
( MBEDTLS_AES_C || MBEDTLS_CAMELLIA_C ) */
#endif /* MBEDTLS_SSL_SOME_SUITES_USE_CBC */
{
MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
@ -1787,8 +1784,7 @@ static int ssl_decrypt_buf( mbedtls_ssl_context *ssl )
}
else
#endif /* MBEDTLS_GCM_C || MBEDTLS_CCM_C */
#if defined(MBEDTLS_CIPHER_MODE_CBC) && \
( defined(MBEDTLS_AES_C) || defined(MBEDTLS_CAMELLIA_C) )
#if defined(MBEDTLS_SSL_SOME_SUITES_USE_CBC)
if( mode == MBEDTLS_MODE_CBC )
{
/*
@ -1999,8 +1995,7 @@ static int ssl_decrypt_buf( mbedtls_ssl_context *ssl )
ssl->in_msglen -= padlen;
}
else
#endif /* MBEDTLS_CIPHER_MODE_CBC &&
( MBEDTLS_AES_C || MBEDTLS_CAMELLIA_C ) */
#endif /* MBEDTLS_SSL_SOME_SUITES_USE_CBC) */
{
MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );