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   1 /*
   2 * AES Cryptographic Algorithm Header File. Include this header file in
   3 * your source which uses these given APIs. (This source is kept under
   4 * public domain)
   5 */
   6 #ifndef __AES_H
   7 #define __AES_H
   8
   9 // AES context structure
  10 typedef struct {
  11  unsigned int Ek[60];
  12  unsigned int Dk[60];
  13  unsigned int Iv[4];
  14  unsigned char Nr;
  15  unsigned char Mode;
  16 } AesCtx;
  17
  18 // key length in bytes
  19 #define KEY128 16
  20 #define KEY192 24
  21 #define KEY256 32
  22 // block size in bytes
  23 #define BLOCKSZ 16
  24 // mode
  25 #define EBC 0
  26 #define CBC 1
  27
  28 // AES API function prototype
  29
  30 int AesCtxIni(AesCtx *pCtx, unsigned char *pIV, unsigned char *pKey, unsigned int KeyLen, unsigned char Mode);
  31 int AesEncrypt(AesCtx *pCtx, unsigned char *pData, unsigned char *pCipher, unsigned int DataLen);
  32 int AesDecrypt(AesCtx *pCtx, unsigned char *pCipher, unsigned char *pData, unsigned int CipherLen);
  33
  34 #endif