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psa: aead: Remove from operation ctx members only used in setup

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Signed-off-by: Ronald Cron <ronald.cron@arm.com>
This commit is contained in:
Ronald Cron 2021-03-26 13:25:17 +01:00
parent ea7ab13991
commit ecbc068252
1 changed files with 11 additions and 11 deletions
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22
library/psa_crypto_aead.c
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@ -32,7 +32,6 @@
typedef struct
{
const mbedtls_cipher_info_t *cipher_info;
union
{
unsigned dummy; /* Make the union non-empty even with no supported algorithms. */
@ -47,11 +46,10 @@ typedef struct
#endif /* MBEDTLS_PSA_BUILTIN_ALG_CHACHA20_POLY1305 */
} ctx;
psa_algorithm_t core_alg;
uint8_t full_tag_length;
uint8_t tag_length;
} aead_operation_t;
#define AEAD_OPERATION_INIT {0, {0}, 0, 0, 0}
#define AEAD_OPERATION_INIT {{0}, 0, 0}
static void psa_aead_abort_internal( aead_operation_t *operation )
{
@ -78,14 +76,16 @@ static psa_status_t psa_aead_setup(
{
psa_status_t status = PSA_ERROR_CORRUPTION_DETECTED;
size_t key_bits;
const mbedtls_cipher_info_t *cipher_info;
mbedtls_cipher_id_t cipher_id;
size_t full_tag_length = 0;
key_bits = attributes->core.bits;
operation->cipher_info =
mbedtls_cipher_info_from_psa( alg, attributes->core.type, key_bits,
&cipher_id );
if( operation->cipher_info == NULL )
cipher_info = mbedtls_cipher_info_from_psa( alg,
attributes->core.type, key_bits,
&cipher_id );
if( cipher_info == NULL )
return( PSA_ERROR_NOT_SUPPORTED );
switch( PSA_ALG_AEAD_WITH_SHORTENED_TAG( alg, 0 ) )
@ -93,7 +93,7 @@ static psa_status_t psa_aead_setup(
#if defined(MBEDTLS_PSA_BUILTIN_ALG_CCM)
case PSA_ALG_AEAD_WITH_SHORTENED_TAG( PSA_ALG_CCM, 0 ):
operation->core_alg = PSA_ALG_CCM;
operation->full_tag_length = 16;
full_tag_length = 16;
/* CCM allows the following tag lengths: 4, 6, 8, 10, 12, 14, 16.
* The call to mbedtls_ccm_encrypt_and_tag or
* mbedtls_ccm_auth_decrypt will validate the tag length. */
@ -112,7 +112,7 @@ static psa_status_t psa_aead_setup(
#if defined(MBEDTLS_PSA_BUILTIN_ALG_GCM)
case PSA_ALG_AEAD_WITH_SHORTENED_TAG( PSA_ALG_GCM, 0 ):
operation->core_alg = PSA_ALG_GCM;
operation->full_tag_length = 16;
full_tag_length = 16;
/* GCM allows the following tag lengths: 4, 8, 12, 13, 14, 15, 16.
* The call to mbedtls_gcm_crypt_and_tag or
* mbedtls_gcm_auth_decrypt will validate the tag length. */
@ -131,7 +131,7 @@ static psa_status_t psa_aead_setup(
#if defined(MBEDTLS_PSA_BUILTIN_ALG_CHACHA20_POLY1305)
case PSA_ALG_AEAD_WITH_SHORTENED_TAG( PSA_ALG_CHACHA20_POLY1305, 0 ):
operation->core_alg = PSA_ALG_CHACHA20_POLY1305;
operation->full_tag_length = 16;
full_tag_length = 16;
/* We only support the default tag length. */
if( alg != PSA_ALG_CHACHA20_POLY1305 )
return( PSA_ERROR_NOT_SUPPORTED );
@ -149,7 +149,7 @@ static psa_status_t psa_aead_setup(
return( PSA_ERROR_NOT_SUPPORTED );
}
if( PSA_AEAD_TAG_LENGTH( alg ) > operation->full_tag_length )
if( PSA_AEAD_TAG_LENGTH( alg ) > full_tag_length )
return( PSA_ERROR_INVALID_ARGUMENT );
operation->tag_length = PSA_AEAD_TAG_LENGTH( alg );