#ifndef _AES_H#define _AES_H#ifndef uint8#define uint8  unsigned char#endif#ifndef uint32#define uint32 unsigned long int#endiftypedef struct Aes{    uint32 erk[64];     /* encryption round keys */    uint32 drk[64];     /* decryption round keys */    int nr;             /* number of rounds */}aes_context;int  aes_set_key( aes_context *ctx, uint8 *key, int nbits );void aes_encrypt( aes_context *ctx, uint8 input[16], uint8 output[16] );void aes_decrypt( aes_context *ctx, uint8 input[16], uint8 output[16] );#endif /* aes.h */