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Add comment on macros that should be kept in sync

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Signed-off-by: Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com>
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Manuel Pégourié-Gonnard
2023-05-24 12:28:38 +02:00
parent f76c2208f6
commit c9d9829533
2 changed files with 12 additions and 2 deletions
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11
include/mbedtls/md.h
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@@ -151,7 +151,16 @@ typedef enum {
MBEDTLS_MD_RIPEMD160, /**< The RIPEMD-160 message digest. */
} mbedtls_md_type_t;
/* Note: this should be kept in sync with PSA_HASH_MAX_SIZE */
/* Note: this should always be >= PSA_HASH_MAX_SIZE
* in all builds with both CRYPTO_C and MD_LIGHT.
*
* This is to make things easier for modules such as TLS that may define a
* buffer size using MD_MAX_SIZE in a part of the code that's common to PSA
* and legacy, then assume the buffer's size is PSA_HASH_MAX_SIZE in another
* part of the code based on PSA.
*
* Currently both macros have the same value, avoiding such issues.
*/
#if defined(MBEDTLS_MD_CAN_SHA512)
#define MBEDTLS_MD_MAX_SIZE 64 /* longest known is SHA512 */
#elif defined(MBEDTLS_MD_CAN_SHA384)