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Add validate_slot_number method to SE drivers

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Pave the way for allowing the application to choose the slot number in
a secure element, rather than always letting the driver choose.
This commit is contained in:
Gilles Peskine 2019-08-05 14:55:14 +02:00
parent 0a23322431
commit ae9964d3ef
1 changed files with 34 additions and 0 deletions
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34
include/psa/crypto_se_driver.h
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@ -833,6 +833,30 @@ typedef psa_status_t (*psa_drv_se_allocate_key_t)(
const psa_key_attributes_t *attributes, const psa_key_attributes_t *attributes,
psa_key_slot_number_t *key_slot); psa_key_slot_number_t *key_slot);
/** \brief A function that determines whether a slot number is valid
* for a key.
*
* \param[in,out] drv_context The driver context structure.
* \param[in] attributes Attributes of the key.
* \param[in] key_slot Slot where the key is to be stored.
*
* \retval #PSA_SUCCESS
* The given slot number is valid for a key with the given
* attributes.
* \retval #PSA_ERROR_INVALID_ARGUMENT
* The given slot number is not valid for a key with the
* given attributes. This includes the case where the slot
* number is not valid at all.
* \retval #PSA_ERROR_ALREADY_EXISTS
* There is already a key with the specified slot number.
* Drivers may choose to return this error from the key
* creation function instead.
*/
typedef psa_status_t (*psa_drv_se_validate_slot_number_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
@ -993,6 +1017,16 @@ typedef struct {
* last call to this function had not taken place. * last call to this function had not taken place.
*/ */
psa_drv_se_allocate_key_t p_allocate; psa_drv_se_allocate_key_t p_allocate;
/** Function that checks the validity of a slot for a key.
*
* The core calls this function instead of
* psa_drv_se_key_management_t::p_allocate to create
* a key in a specific slot. It then calls the actual creation function
* (such as psa_drv_se_key_management_t::p_import or
* psa_drv_se_key_management_t::p_generate) or
* psa_drv_se_key_management_t::p_destroy.
*/
psa_drv_se_validate_slot_number_t p_validate_slot_number;
/** 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 */