/*
* Checks whether key is initialized and triggers key initialization if necessary.
* Returns 1 if key is initialized and 0 otherwise.
*/
static int keyInitialization() {
if (checkedInitializedKey == 0) {
#ifdef RESET_KEY
key_flash_erase_keying_material();
#endif
key_flash_restore_keying_material(&initializedKey, 1, AES_128_KEY_LENGTH);
if (initializedKey != 1) initializedKey = 0;
checkedInitializedKey = 1;
}
// Check whether key was already initialized
if (initializedKey == 1) {
return 1;
}
// Check whether key initialization was already triggered
if (keyInitializationTriggered == 0) {
printf("[Adaptivesec_Driver_Wrapper] Trigger key initialization.\n");
// Trigger light app
process_start(&light_app_process, NULL);
keyInitializationTriggered = 1;
return 0;
}
// Check whether key was initialized
uint8_t initialized = 0;
key_flash_restore_keying_material(&initialized, 1, AES_128_KEY_LENGTH);
if (initialized == 1) {
printf("[Adaptivesec_Driver_Wrapper] Key is initialized.\n");
initializedKey = 1;
// Causes a recursive call to keyInitialization, which is fine as initializedKey is now 1
init();
return 1;
}
// Key initialization was already triggered but key is not initialized yet
return 0;
}
/*---------------------------------------------------------------------------*/
static uint8_t *
get_secret_with(const linkaddr_t *addr)
{
#if LINKADDR_SIZE == 2
if(addr->u16 > FULLY_MAX_NODES) {
return NULL;
}
key_flash_restore_keying_material(key,
FULLY_PAIRWISE_KEY_LEN,
addr->u16 * FULLY_PAIRWISE_KEY_LEN);
return key;
#else /* LINKADDR_SIZE == 2 */
return NULL;
#endif /* LINKADDR_SIZE == 2 */
}
