extern int aes_encode(uint8_t *iv, uint8_t *key, uint8_t *input, uint8_t *output, int length);
extern int aes_decode(uint8_t *iv, uint8_t *key, uint8_t *input, uint8_t *output, int length);
extern int aes_encode(uint8_t *iv, uint8_t *key, uint8_t *input, uint8_t *output, int length);
extern int aes_decode(uint8_t *iv, uint8_t *key, uint8_t *input, uint8_t *output, int length);