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New driver method: allocate

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Add a driver method to allocate a key slot for a key that is about to
be created.
This commit is contained in:
Gilles Peskine 2019-07-12 23:33:02 +02:00
parent 8597bc13e7
commit f2223c868d
1 changed files with 26 additions and 0 deletions
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26
include/psa/crypto_se_driver.h
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@ -780,6 +780,30 @@ typedef struct {
*/ */
/**@{*/ /**@{*/
/* This type is documented in crypto.h. As far as drivers are concerned,
* this is an opaque type. */
typedef struct psa_key_attributes_s psa_key_attributes_t;
/** \brief A function that allocates a slot for a key.
*
* \param[in,out] drv_context The driver context structure.
* \param[in] attributes Attributes of the key.
* \param[out] key_slot Slot where the key will be stored.
* This must be a valid slot for a key of the
* chosen type. It must be unoccupied.
*
* \retval #PSA_SUCCESS
* Success.
* The core will record \c *key_slot as the key slot where the key
* is stored and will update the persistent data in storage.
* \retval #PSA_ERROR_NOT_SUPPORTED
* \retval #PSA_ERROR_INSUFFICIENT_STORAGE
*/
typedef psa_status_t (*psa_drv_se_allocate_key_t)(
psa_drv_se_context_t *drv_context,
const psa_key_attributes_t *attributes,
psa_key_slot_number_t *key_slot);
/** \brief A function that imports a key into a secure element in binary format /** \brief A function that imports a key into a secure element in binary format
* *
* This function can support any output from psa_export_key(). Refer to the * This function can support any output from psa_export_key(). Refer to the
@ -915,6 +939,8 @@ typedef psa_status_t (*psa_drv_se_generate_key_t)(psa_drv_se_context_t *drv_cont
* If one of the functions is not implemented, it should be set to NULL. * If one of the functions is not implemented, it should be set to NULL.
*/ */
typedef struct { typedef struct {
/** Function that allocates a slot. */
psa_drv_se_allocate_key_t p_allocate;
/** Function that performs a key import operation */ /** Function that performs a key import operation */
psa_drv_se_import_key_t p_import; psa_drv_se_import_key_t p_import;
/** Function that performs a generation */ /** Function that performs a generation */