yuzu-emu/mbedtls
2
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

Add volatile key identifiers

Browse source 
Volatile key identifiers are introduced in
PSA Crypto API v1.0.0. They are returned by the APIs
when importing or generating or deriving a volatile key.

Signed-off-by: Ronald Cron <ronald.cron@arm.com>
This commit is contained in:
Ronald Cron 2020-07-17 14:13:26 +02:00
parent d2ed4815da
commit 2a99315cc5
3 changed files with 33 additions and 6 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

3
library/psa_crypto.c
View file

@ -1851,6 +1851,7 @@ static psa_status_t psa_start_key_creation(
psa_se_drv_table_entry_t **p_drv )
{
psa_status_t status;
psa_key_id_t volatile_key_id;
psa_key_slot_t *slot;
(void) method;
@ -1860,7 +1861,7 @@ static psa_status_t psa_start_key_creation(
if( status != PSA_SUCCESS )
return( status );
status = psa_get_empty_key_slot( handle, p_slot );
status = psa_get_empty_key_slot( handle, &volatile_key_id, p_slot );
if( status != PSA_SUCCESS )
return( status );
slot = *p_slot;

8
library/psa_crypto_slot_management.c
View file

@ -114,6 +114,7 @@ void psa_wipe_all_key_slots( void )
}
psa_status_t psa_get_empty_key_slot( psa_key_handle_t *handle,
psa_key_id_t *volatile_key_id,
psa_key_slot_t **p_slot )
{
if( ! global_data.key_slots_initialized )
@ -123,8 +124,12 @@ psa_status_t psa_get_empty_key_slot( psa_key_handle_t *handle,
{
*p_slot = &global_data.key_slots[*handle - 1];
if( ! psa_is_key_slot_occupied( *p_slot ) )
{
*volatile_key_id = PSA_KEY_ID_VOLATILE_MIN + ( *handle ) - 1;
return( PSA_SUCCESS );
}
}
*p_slot = NULL;
return( PSA_ERROR_INSUFFICIENT_MEMORY );
}
@ -215,6 +220,7 @@ psa_status_t psa_open_key( mbedtls_svc_key_id_t key, psa_key_handle_t *handle )
{
#if defined(MBEDTLS_PSA_CRYPTO_STORAGE_C)
psa_status_t status;
psa_key_id_t volatile_key_id;
psa_key_slot_t *slot;
*handle = 0;
@ -223,7 +229,7 @@ psa_status_t psa_open_key( mbedtls_svc_key_id_t key, psa_key_handle_t *handle )
if( status != PSA_SUCCESS )
return( status );
status = psa_get_empty_key_slot( handle, &slot );
status = psa_get_empty_key_slot( handle, &volatile_key_id, &slot );
if( status != PSA_SUCCESS )
return( status );

24
library/psa_crypto_slot_management.h
View file

@ -28,6 +28,23 @@
* The value is a compile-time constant for now, for simplicity. */
#define PSA_KEY_SLOT_COUNT 32
/** Range of volatile key identifiers.
*
* The last PSA_KEY_SLOT_COUNT identifiers of the implementation range
* of key identifiers are reserved for volatile key identifiers.
* A volatile key identifier is equal to PSA_KEY_ID_VOLATILE_MIN plus the
* index of the key slot containing the volatile key definition.
*/
/** The minimum value for a volatile key identifier.
*/
#define PSA_KEY_ID_VOLATILE_MIN ( PSA_KEY_ID_VENDOR_MAX - \
PSA_KEY_SLOT_COUNT + 1 )
/** The maximum value for a volatile key identifier.
*/
#define PSA_KEY_ID_VOLATILE_MAX PSA_KEY_ID_VENDOR_MAX
/** Access a key slot at the given handle.
*
* \param handle Key handle to query.
@ -62,8 +79,10 @@ void psa_wipe_all_key_slots( void );
* This function returns a key slot that is available for use and is in its
* ground state (all-bits-zero).
*
* \param[out] handle On success, a slot number that can be used as a
* handle to the slot.
* \param[out] handle On success, a slot number that can be used
* as a handle to the slot.
* \param[out] volatile_key_id On success, volatile key identifier
* associated to the returned slot.
* \param[out] p_slot On success, a pointer to the slot.
*
* \retval #PSA_SUCCESS
@ -71,6 +90,7 @@ void psa_wipe_all_key_slots( void );
* \retval #PSA_ERROR_BAD_STATE
*/
psa_status_t psa_get_empty_key_slot( psa_key_handle_t *handle,
psa_key_id_t *volatile_key_id,
psa_key_slot_t **p_slot );
/** Test whether a lifetime designates a key in an external cryptoprocessor.