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Switch PSA_HASH_FINAL_SIZE to PSA_HASH_SIZE

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Make this macro work on derived algorithms as well (HMAC,
hash-and-sign, etc.).
This commit is contained in:
Gilles Peskine 2018-04-19 08:29:59 +02:00 committed by itayzafrir
parent 65eb8588fe
commit 71bb7b77f0
2 changed files with 21 additions and 21 deletions
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40
include/psa/crypto.h
View file

@ -814,23 +814,23 @@ typedef struct psa_hash_operation_s psa_hash_operation_t;
* An implementation may return either 0 or the correct size
* for a hash algorithm that it recognizes, but does not support.
*/
#define PSA_HASH_FINAL_SIZE(alg) \
( \
(alg) == PSA_ALG_MD2 ? 16 : \
(alg) == PSA_ALG_MD4 ? 16 : \
(alg) == PSA_ALG_MD5 ? 16 : \
(alg) == PSA_ALG_RIPEMD160 ? 20 : \
(alg) == PSA_ALG_SHA_1 ? 20 : \
(alg) == PSA_ALG_SHA_224 ? 28 : \
(alg) == PSA_ALG_SHA_256 ? 32 : \
(alg) == PSA_ALG_SHA_384 ? 48 : \
(alg) == PSA_ALG_SHA_512 ? 64 : \
(alg) == PSA_ALG_SHA_512_224 ? 28 : \
(alg) == PSA_ALG_SHA_512_256 ? 32 : \
(alg) == PSA_ALG_SHA3_224 ? 28 : \
(alg) == PSA_ALG_SHA3_256 ? 32 : \
(alg) == PSA_ALG_SHA3_384 ? 48 : \
(alg) == PSA_ALG_SHA3_512 ? 64 : \
#define PSA_HASH_SIZE(alg) \
( \
PSA_ALG_RSA_GET_HASH(alg) == PSA_ALG_MD2 ? 16 : \
PSA_ALG_RSA_GET_HASH(alg) == PSA_ALG_MD4 ? 16 : \
PSA_ALG_RSA_GET_HASH(alg) == PSA_ALG_MD5 ? 16 : \
PSA_ALG_RSA_GET_HASH(alg) == PSA_ALG_RIPEMD160 ? 20 : \
PSA_ALG_RSA_GET_HASH(alg) == PSA_ALG_SHA_1 ? 20 : \
PSA_ALG_RSA_GET_HASH(alg) == PSA_ALG_SHA_224 ? 28 : \
PSA_ALG_RSA_GET_HASH(alg) == PSA_ALG_SHA_256 ? 32 : \
PSA_ALG_RSA_GET_HASH(alg) == PSA_ALG_SHA_384 ? 48 : \
PSA_ALG_RSA_GET_HASH(alg) == PSA_ALG_SHA_512 ? 64 : \
PSA_ALG_RSA_GET_HASH(alg) == PSA_ALG_SHA_512_224 ? 28 : \
PSA_ALG_RSA_GET_HASH(alg) == PSA_ALG_SHA_512_256 ? 32 : \
PSA_ALG_RSA_GET_HASH(alg) == PSA_ALG_SHA3_224 ? 28 : \
PSA_ALG_RSA_GET_HASH(alg) == PSA_ALG_SHA3_256 ? 32 : \
PSA_ALG_RSA_GET_HASH(alg) == PSA_ALG_SHA3_384 ? 48 : \
PSA_ALG_RSA_GET_HASH(alg) == PSA_ALG_SHA3_512 ? 64 : \
0)
/** Start a multipart hash operation.
@ -915,7 +915,7 @@ psa_status_t psa_hash_update(psa_hash_operation_t *operation,
* \param hash_size Size of the \c hash buffer in bytes.
* \param hash_length On success, the number of bytes
* that make up the hash value. This is always
* #PSA_HASH_FINAL_SIZE(alg) where \c alg is the
* #PSA_HASH_SIZE(alg) where \c alg is the
* hash algorithm that is calculated.
*
* \retval PSA_SUCCESS
@ -924,7 +924,7 @@ psa_status_t psa_hash_update(psa_hash_operation_t *operation,
* The operation state is not valid (not started, or already completed).
* \retval PSA_ERROR_BUFFER_TOO_SMALL
* The size of the \c hash buffer is too small. You can determine a
* sufficient buffer size by calling #PSA_HASH_FINAL_SIZE(alg)
* sufficient buffer size by calling #PSA_HASH_SIZE(alg)
* where \c alg is the hash algorithm that is calculated.
* \retval PSA_ERROR_INSUFFICIENT_MEMORY
* \retval PSA_ERROR_COMMUNICATION_FAILURE
@ -1020,7 +1020,7 @@ typedef struct psa_mac_operation_s psa_mac_operation_t;
* for a MAC algorithm that it recognizes, but does not support.
*/
#define PSA_MAC_FINAL_SIZE(key_type, key_bits, alg) \
(PSA_ALG_IS_HMAC(alg) ? PSA_HASH_FINAL_SIZE(PSA_ALG_HMAC_HASH(alg)) : \
(PSA_ALG_IS_HMAC(alg) ? PSA_HASH_SIZE(PSA_ALG_HMAC_HASH(alg)) : \
PSA_ALG_IS_BLOCK_CIPHER_MAC(alg) ? PSA_BLOCK_CIPHER_BLOCK_SIZE(key_type) : \
0)

2
library/psa_crypto.c
View file

@ -774,7 +774,7 @@ psa_status_t psa_hash_finish( psa_hash_operation_t *operation,
size_t *hash_length )
{
int ret;
size_t actual_hash_length = PSA_HASH_FINAL_SIZE( operation->alg );
size_t actual_hash_length = PSA_HASH_SIZE( operation->alg );
/* Fill the output buffer with something that isn't a valid hash
* (barring an attack on the hash and deliberately-crafted input),