/*!
* Deallocates a slot in the SCC
*
* @brief Deallocates a slot in the SCC
*
* @param user_ctx
* @param ownerid
* @param slot
* @param key_length
* @param black_data
*
* @return A return code of type #fsl_shw_return_t.
*/
fsl_shw_return_t do_scc_slot_decrypt(fsl_shw_uco_t * user_ctx,
uint64_t ownerid,
uint32_t slot,
uint32_t key_length,
const uint8_t * black_data)
{
scc_return_t scc_code;
user_ctx = NULL; /* for unused-param warning */
scc_code = scc_decrypt_slot(ownerid, slot, key_length, black_data);
return (scc_code == SCC_RET_OK) ? FSL_RETURN_OK_S : FSL_RETURN_ERROR_S;
}
fsl_shw_return_t
keystore_slot_decrypt(fsl_shw_uco_t *user_ctx, fsl_shw_kso_t *keystore,
uint64_t owner_id, uint32_t slot, uint32_t length,
const uint8_t *source)
{
#ifdef FSL_HAVE_SCC2
LOCK_INCLUDES;
fsl_shw_return_t retval = FSL_RETURN_ERROR_S;
uint32_t slot_length;
uint32_t IV[4];
uint32_t *iv_ptr = (uint32_t *) & (owner_id);
/* Build the IV */
IV[0] = iv_ptr[0];
IV[1] = iv_ptr[1];
IV[2] = 0;
IV[3] = 0;
ACQUIRE_LOCK;
/* Call scc decrypt function to decrypt the data. */
/* Ensure that the data will fit in the key slot */
slot_length =
keystore->slot_get_slot_size(keystore->user_data, slot);
if (length > slot_length)
goto out;
/* Call scc decrypt function to encrypt the data. */
retval = do_scc_decrypt_region(user_ctx,
(void *)keystore->
slot_get_base(keystore->user_data,
slot),
keystore->slot_get_offset(keystore->
user_data,
slot),
length, source, IV,
FSL_SHW_CYPHER_MODE_CBC);
goto out;
out:RELEASE_LOCK;
return retval;
#else
scc_return_t retval;
retval = scc_decrypt_slot(owner_id, slot, length, source);
if (retval == SCC_RET_OK)
return FSL_RETURN_OK_S;
return FSL_RETURN_ERROR_S;
#endif /* FSL_HAVE_SCC2 */
}