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SE driver: validate_slot_number: support changing persistent data

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Add a parameter to the p_validate_slot_number method to allow the
driver to modify the persistent data.

With the current structure of the core, the persistent data is already
updated. All it took was adding a way to modify it.
This commit is contained in:
Gilles Peskine 2019-10-01 14:27:23 +02:00
parent 3efcebbc5e
commit 5ec3a30edb
3 changed files with 13 additions and 0 deletions
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8
include/psa/crypto_se_driver.h
View file

@ -927,7 +927,14 @@ typedef psa_status_t (*psa_drv_se_allocate_key_t)(
* sake of initial device provisioning or onboarding. Such a mechanism may
* be added to a future version of the PSA Cryptography API specification.
*
* This function may update the driver's persistent data through
* \p persistent_data. The core will save the updated persistent data at the
* end of the key creation process. See the description of
* ::psa_drv_se_allocate_key_t for more information.
*
* \param[in,out] drv_context The driver context structure.
* \param[in,out] persistent_data A pointer to the persistent data
* that allows writing.
* \param[in] attributes Attributes of the key.
* \param method The way in which the key is being created.
* \param[in] key_slot Slot where the key is to be stored.
@ -946,6 +953,7 @@ typedef psa_status_t (*psa_drv_se_allocate_key_t)(
*/
typedef psa_status_t (*psa_drv_se_validate_slot_number_t)(
psa_drv_se_context_t *drv_context,
void *persistent_data,
const psa_key_attributes_t *attributes,
psa_key_creation_method_t method,
psa_key_slot_number_t key_slot);

1
library/psa_crypto_se.c
View file

@ -222,6 +222,7 @@ psa_status_t psa_find_se_slot_for_key(
if( p_validate_slot_number == NULL )
return( PSA_ERROR_NOT_SUPPORTED );
status = p_validate_slot_number( &driver->context,
driver->internal.persistent_data,
attributes, method,
*slot_number );
}

4
tests/suites/test_suite_psa_crypto_se_driver_hal.function
View file

@ -90,11 +90,13 @@ static validate_slot_number_directions_t validate_slot_number_directions;
/* Validate a choice of slot number as directed. */
static psa_status_t validate_slot_number_as_directed(
psa_drv_se_context_t *context,
void *persistent_data,
const psa_key_attributes_t *attributes,
psa_key_creation_method_t method,
psa_key_slot_number_t slot_number )
{
(void) context;
(void) persistent_data;
(void) attributes;
DRIVER_ASSERT_RETURN( slot_number ==
validate_slot_number_directions.slot_number );
@ -367,11 +369,13 @@ static psa_status_t ram_allocate( psa_drv_se_context_t *context,
static psa_status_t ram_validate_slot_number(
psa_drv_se_context_t *context,
void *persistent_data,
const psa_key_attributes_t *attributes,
psa_key_creation_method_t method,
psa_key_slot_number_t slot_number )
{
(void) context;
(void) persistent_data;
(void) attributes;
(void) method;
if( slot_number >= ARRAY_LENGTH( ram_slots ) )