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Clarify psa_get_and_lock_transparent_key_slot_with_policy() purpose

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Clarify the purpose of
psa_get_and_lock_transparent_key_slot_with_policy() and
define it even when MBEDTLS_PSA_CRYPTO_SE_C is disabled
for the purpose of static drivers.

Signed-off-by: Ronald Cron <ronald.cron@arm.com>
This commit is contained in:
Ronald Cron 2021-08-24 15:39:44 +02:00
parent c668de6f7f
commit 8a0466a052
1 changed files with 6 additions and 11 deletions
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17
library/psa_crypto.c
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@ -1019,16 +1019,16 @@ error:
/** Get a key slot containing a transparent key and lock it.
*
* A transparent key is a key for which the key material is directly
* available, as opposed to a key in a secure element.
* available, as opposed to a key in a secure element and/or to be used
* by a secure element.
*
* This is a temporary function to use instead of
* psa_get_and_lock_key_slot_with_policy() until secure element support is
* fully implemented.
* This is a temporary function that may be used instead of
* psa_get_and_lock_key_slot_with_policy() when there is no opaque key support
* for a cryptographic operation.
*
* On success, the returned key slot is locked. It is the responsibility of the
* caller to unlock the key slot when it does not access it anymore.
*/
#if defined(MBEDTLS_PSA_CRYPTO_SE_C)
static psa_status_t psa_get_and_lock_transparent_key_slot_with_policy(
mbedtls_svc_key_id_t key,
psa_key_slot_t **p_slot,
@ -1040,7 +1040,7 @@ static psa_status_t psa_get_and_lock_transparent_key_slot_with_policy(
if( status != PSA_SUCCESS )
return( status );
if( psa_key_slot_is_external( *p_slot ) )
if( psa_key_lifetime_is_external( (*p_slot)->attr.lifetime ) )
{
psa_unlock_key_slot( *p_slot );
*p_slot = NULL;
@ -1049,11 +1049,6 @@ static psa_status_t psa_get_and_lock_transparent_key_slot_with_policy(
return( PSA_SUCCESS );
}
#else /* MBEDTLS_PSA_CRYPTO_SE_C */
/* With no secure element support, all keys are transparent. */
#define psa_get_and_lock_transparent_key_slot_with_policy( key, p_slot, usage, alg ) \
psa_get_and_lock_key_slot_with_policy( key, p_slot, usage, alg )
#endif /* MBEDTLS_PSA_CRYPTO_SE_C */
psa_status_t psa_remove_key_data_from_memory( psa_key_slot_t *slot )
{