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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>
This commit is contained in:
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_RIPEMD160, /**< The RIPEMD-160 message digest. */
} mbedtls_md_type_t; } 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) #if defined(MBEDTLS_MD_CAN_SHA512)
#define MBEDTLS_MD_MAX_SIZE 64 /* longest known is SHA512 */ #define MBEDTLS_MD_MAX_SIZE 64 /* longest known is SHA512 */
#elif defined(MBEDTLS_MD_CAN_SHA384) #elif defined(MBEDTLS_MD_CAN_SHA384)

3
include/psa/crypto_sizes.h
View File

@ -128,7 +128,8 @@
/* Note: for HMAC-SHA-3, the block size is 144 bytes for HMAC-SHA3-226, /* Note: for HMAC-SHA-3, the block size is 144 bytes for HMAC-SHA3-226,
* 136 bytes for HMAC-SHA3-256, 104 bytes for SHA3-384, 72 bytes for * 136 bytes for HMAC-SHA3-256, 104 bytes for SHA3-384, 72 bytes for
* HMAC-SHA3-512. */ * HMAC-SHA3-512. */
/* Note: PSA_HASH_MAX_SIZE should be kept in sync with MBEDTLS_MD_MAX_SIZE. */ /* Note: PSA_HASH_MAX_SIZE should be kept in sync with MBEDTLS_MD_MAX_SIZE,
* see the note on MBEDTLS_MD_MAX_SIZE for details. */
#if defined(PSA_WANT_ALG_SHA_512) #if defined(PSA_WANT_ALG_SHA_512)
#define PSA_HASH_MAX_SIZE 64 #define PSA_HASH_MAX_SIZE 64
#define PSA_HMAC_MAX_HASH_BLOCK_SIZE 128 #define PSA_HMAC_MAX_HASH_BLOCK_SIZE 128