CC_AES_256_BIT_KEY_SIZE
case CC_AES_256_BIT_KEY_SIZE:
case (CC_AES_256_BIT_KEY_SIZE * 2):
#define CC_AES_256_BIT_KEY_SIZE_WORDS (CC_AES_256_BIT_KEY_SIZE >> 2)
#define CC_AES_KEY_SIZE_MAX CC_AES_256_BIT_KEY_SIZE