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Introduce preprocessor symbols for MD algorithm support via PSA

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These new symbols will allow code to call the md module and benefit from PSA
accelerator drivers. Code must use MBEDTLS_MD_CAN_xxx instead of
MBEDTLS_xxx_C to check for support for a particular algorithm.

This commit only defines the symbols. Subsequent commits will implement
those symbols in the md module, and in users of the md module.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
Signed-off-by: Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com>
This commit is contained in:
Gilles Peskine 2022-10-22 18:27:57 +02:00 committed by Manuel Pégourié-Gonnard
parent 2a44ac245f
commit 416d0e2b01
1 changed files with 85 additions and 0 deletions
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85
include/mbedtls/md.h
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@ -32,6 +32,91 @@
#include "mbedtls/build_info.h"
#include "mbedtls/platform_util.h"
#if defined(MBEDTLS_MD_LIGHT)
/*
* - MBEDTLS_MD_CAN_xxx is defined if the md module can perform xxx.
* - MBEDTLS_MD_xxx_VIA_PSA is defined if the md module performs xxx via PSA.
* - MBEDTLS_MD_SOME_PSA is defined if at least one algorithm is performed
* via PSA.
* - MBEDTLS_MD_SOME_LEGACY is defined if at least one algorithm is performed
* via a direct legacy call.
*
* The md module performs an algorithm via PSA if there is a PSA hash
* accelerator, and makes a direct legacy call otherwise.
*/
/* PSA accelerated implementations */
#if defined(MBEDTLS_PSA_CRYPTO_C)
#if defined(MBEDTLS_PSA_ACCEL_ALG_MD5)
#define MBEDTLS_MD_CAN_MD5
#define MBEDTLS_MD_MD5_VIA_PSA
#define MBEDTLS_MD_SOME_PSA
#endif
#if defined(MBEDTLS_PSA_ACCEL_ALG_SHA_1)
#define MBEDTLS_MD_CAN_SHA1
#define MBEDTLS_MD_SHA1_VIA_PSA
#define MBEDTLS_MD_SOME_PSA
#endif
#if defined(MBEDTLS_PSA_ACCEL_ALG_SHA_224)
#define MBEDTLS_MD_CAN_SHA224
#define MBEDTLS_MD_SHA224_VIA_PSA
#define MBEDTLS_MD_SOME_PSA
#endif
#if defined(MBEDTLS_PSA_ACCEL_ALG_SHA_256)
#define MBEDTLS_MD_CAN_SHA256
#define MBEDTLS_MD_SHA256_VIA_PSA
#define MBEDTLS_MD_SOME_PSA
#endif
#if defined(MBEDTLS_PSA_ACCEL_ALG_SHA_384)
#define MBEDTLS_MD_CAN_SHA384
#define MBEDTLS_MD_SHA384_VIA_PSA
#define MBEDTLS_MD_SOME_PSA
#endif
#if defined(MBEDTLS_PSA_ACCEL_ALG_SHA_512)
#define MBEDTLS_MD_CAN_SHA512
#define MBEDTLS_MD_SHA512_VIA_PSA
#define MBEDTLS_MD_SOME_PSA
#endif
#if defined(MBEDTLS_PSA_ACCEL_ALG_RIPEMD160)
#define MBEDTLS_MD_CAN_RIPEMD160
#define MBEDTLS_MD_RIPEMD160_VIA_PSA
#define MBEDTLS_MD_SOME_PSA
#endif
#endif /* MBEDTLS_PSA_CRYPTO_C */
/* Built-in implementations */
#if defined(MBEDTLS_MD5_C)
#define MBEDTLS_MD_CAN_MD5
#define MBEDTLS_MD_SOME_LEGACY
#endif
#if defined(MBEDTLS_SHA1_C)
#define MBEDTLS_MD_CAN_SHA1
#define MBEDTLS_MD_SOME_LEGACY
#endif
#if defined(MBEDTLS_SHA224_C)
#define MBEDTLS_MD_CAN_SHA224
#define MBEDTLS_MD_SOME_LEGACY
#endif
#if defined(MBEDTLS_SHA256_C)
#define MBEDTLS_MD_CAN_SHA256
#define MBEDTLS_MD_SOME_LEGACY
#endif
#if defined(MBEDTLS_SHA384_C)
#define MBEDTLS_MD_CAN_SHA384
#define MBEDTLS_MD_SOME_LEGACY
#endif
#if defined(MBEDTLS_SHA512_C)
#define MBEDTLS_MD_CAN_SHA512
#define MBEDTLS_MD_SOME_LEGACY
#endif
#if defined(MBEDTLS_RIPEMD160_C)
#define MBEDTLS_MD_CAN_RIPEMD160
#define MBEDTLS_MD_SOME_LEGACY
#endif
#endif /* MBEDTLS_MD_LIGHT */
/** The selected feature is not available. */
#define MBEDTLS_ERR_MD_FEATURE_UNAVAILABLE -0x5080
/** Bad input parameters to function. */