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Implement psa_key_slot_state_transition

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This inline function is used in every case we want to change the state of a slot,
except for where we do not care about what the state of the slot was before.

Signed-off-by: Ryan Everett <ryan.everett@arm.com>
This commit is contained in:
Ryan Everett 2024-01-04 10:53:26 +00:00
parent 39cc9d755e
commit 4a78277cb2
1 changed files with 25 additions and 0 deletions
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25
library/psa_crypto_slot_management.h
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@ -112,6 +112,31 @@ void psa_wipe_all_key_slots(void);
*/
psa_status_t psa_get_empty_key_slot(psa_key_id_t *volatile_key_id,
psa_key_slot_t **p_slot);
/** Change the state of a key slot.
*
* This function changes the state of the key slot from expected_state to
* new state. If the state of the slot was not expected_state, the state is
* unchanged.
*
* \param[in] slot The key slot.
* \param[in] expected_state The current state of the slot.
* \param[in] new_state The new state of the slot.
*
* \retval #PSA_SUCCESS
The key slot's state variable is new_state.
* \retval #PSA_ERROR_BAD_STATE
* The slot's state was not expected_state.
*/
static inline psa_status_t psa_key_slot_state_transition(
psa_key_slot_t *slot, psa_key_slot_state_t expected_state,
psa_key_slot_state_t new_state)
{
if (slot->state != expected_state) {
return PSA_ERROR_BAD_STATE;
}
slot->state = new_state;
return PSA_SUCCESS;
}
/** Register as a reader of a key slot.
*