/** * \file aes.h */#ifndef XYSSL_AES_H#define XYSSL_AES_H#define AES_ENCRYPT     1#define AES_DECRYPT     0/** * \brief          AES context structure */typedef struct{    int nr;                     /*!<  number of rounds  */    unsigned long *rk;          /*!<  AES round keys    */    unsigned long buf[68];      /*!<  unaligned data    */}aes_context;#ifdef __cplusplusextern "C" {#endif/** * \brief          AES key schedule (encryption) * * \param ctx      AES context to be initialized * \param key      encryption key * \param keysize  must be 128, 192 or 256 */void aes_setkey_enc( aes_context *ctx, unsigned char *key, int keysize );/** * \brief          AES key schedule (decryption) * * \param ctx      AES context to be initialized * \param key      decryption key * \param keysize  must be 128, 192 or 256 */void aes_setkey_dec( aes_context *ctx, unsigned char *key, int keysize );/** * \brief          AES-ECB block encryption/decryption * * \param ctx      AES context * \param mode     AES_ENCRYPT or AES_DECRYPT * \param input    16-byte input block * \param output   16-byte output block */void aes_crypt_ecb( aes_context *ctx,                    int mode,                    unsigned char input[16],                    unsigned char output[16] );/** * \brief          AES-CBC buffer encryption/decryption * * \param ctx      AES context * \param mode     AES_ENCRYPT or AES_DECRYPT * \param length   length of the input data * \param iv       initialization vector (updated after use) * \param input    buffer holding the input data * \param output   buffer holding the output data */void aes_crypt_cbc( aes_context *ctx,                    int mode,                    int length,                    unsigned char iv[16],                    unsigned char *input,                    unsigned char *output );/** * \brief          AES-CFB buffer encryption/decryption * * \param ctx      AES context * \param mode     AES_ENCRYPT or AES_DECRYPT * \param length   length of the input data * \param iv_off   offset in IV (updated after use) * \param iv       initialization vector (updated after use) * \param input    buffer holding the input data * \param output   buffer holding the output data */void aes_crypt_cfb( aes_context *ctx,                    int mode,                    int length,                    int *iv_off,                    unsigned char iv[16],                    unsigned char *input,                    unsigned char *output );/** * \brief          Checkup routine * * \return         0 if successful, or 1 if the test failed */int aes_self_test( int verbose );#ifdef __cplusplus}#endif#endif /* aes.h */