extern int aes_cmac8(uint8_t *iv, uint8_t *key, uint8_t *input, uint8_t *mac, int length);
extern int sha256hash(uint8_t *input, int length, uint8_t *hash);
extern int aes_cmac8(uint8_t *iv, uint8_t *key, uint8_t *input, uint8_t *mac, int length);
extern int sha256hash(uint8_t *input, int length, uint8_t *hash);