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Refactor is_encrypt into aead setup arguments

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Avoid touching the operation until later.

Signed-off-by: Paul Elliott <paul.elliott@arm.com>
This commit is contained in:
Paul Elliott 2021-08-23 18:59:49 +01:00
parent 36869706e2
commit d9343f2f0f
1 changed files with 6 additions and 8 deletions
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14
library/psa_crypto.c
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@ -3403,6 +3403,7 @@ static psa_algorithm_t psa_aead_get_base_algorithm( psa_algorithm_t alg )
/* Set the key for a multipart authenticated operation. */ /* Set the key for a multipart authenticated operation. */
static psa_status_t psa_aead_setup( psa_aead_operation_t *operation, static psa_status_t psa_aead_setup( psa_aead_operation_t *operation,
int is_encrypt,
mbedtls_svc_key_id_t key, mbedtls_svc_key_id_t key,
psa_algorithm_t alg ) psa_algorithm_t alg )
{ {
@ -3430,7 +3431,7 @@ static psa_status_t psa_aead_setup( psa_aead_operation_t *operation,
goto exit; goto exit;
} }
if( operation->is_encrypt ) if( is_encrypt )
key_usage = PSA_KEY_USAGE_ENCRYPT; key_usage = PSA_KEY_USAGE_ENCRYPT;
else else
key_usage = PSA_KEY_USAGE_DECRYPT; key_usage = PSA_KEY_USAGE_DECRYPT;
@ -3445,7 +3446,7 @@ static psa_status_t psa_aead_setup( psa_aead_operation_t *operation,
.core = slot->attr .core = slot->attr
}; };
if( operation->is_encrypt ) if( is_encrypt )
status = psa_driver_wrapper_aead_encrypt_setup( operation, status = psa_driver_wrapper_aead_encrypt_setup( operation,
&attributes, &attributes,
slot->key.data, slot->key.data,
@ -3472,6 +3473,7 @@ exit:
{ {
status = unlock_status; status = unlock_status;
operation->alg = psa_aead_get_base_algorithm( alg ); operation->alg = psa_aead_get_base_algorithm( alg );
operation->is_encrypt = is_encrypt;
} }
else else
psa_aead_abort( operation ); psa_aead_abort( operation );
@ -3484,9 +3486,7 @@ psa_status_t psa_aead_encrypt_setup( psa_aead_operation_t *operation,
mbedtls_svc_key_id_t key, mbedtls_svc_key_id_t key,
psa_algorithm_t alg ) psa_algorithm_t alg )
{ {
operation->is_encrypt = 1; return( psa_aead_setup( operation, 1, key, alg ) );
return( psa_aead_setup( operation, key, alg ) );
} }
/* Set the key for a multipart authenticated decryption operation. */ /* Set the key for a multipart authenticated decryption operation. */
@ -3494,9 +3494,7 @@ psa_status_t psa_aead_decrypt_setup( psa_aead_operation_t *operation,
mbedtls_svc_key_id_t key, mbedtls_svc_key_id_t key,
psa_algorithm_t alg ) psa_algorithm_t alg )
{ {
operation->is_encrypt = 0; return( psa_aead_setup( operation, 0, key, alg ) );
return( psa_aead_setup( operation, key, alg ) );
} }
/* Generate a random nonce / IV for multipart AEAD operation */ /* Generate a random nonce / IV for multipart AEAD operation */