/* rijndael-api-fst.h   v2.0   August '99 * Optimised ANSI C code */#include <stdio.h>#include "rijndael-alg-fst.h"/*  Defines:	Add any additional defines you need*/#define     DIR_ENCRYPT     0    /*  Are we encrpyting?  */#define     DIR_DECRYPT     1    /*  Are we decrpyting?  */#define     MODE_ECB        1    /*  Are we ciphering in ECB mode?   */#define     MODE_CBC        2    /*  Are we ciphering in CBC mode?   */#define     MODE_CFB1       3    /*  Are we ciphering in 1-bit CFB mode? */#define     TRUE            1#define     FALSE           0#define	BITSPERBLOCK		128		/* Default number of bits in a cipher block *//*  Error Codes - CHANGE POSSIBLE: inclusion of additional error codes  */#define     BAD_KEY_DIR        -1  /*  Key direction is invalid, e.g.,					unknown value */#define     BAD_KEY_MAT        -2  /*  Key material not of correct 					length */#define     BAD_KEY_INSTANCE   -3  /*  Key passed is not valid  */#define     BAD_CIPHER_MODE    -4  /*  Params struct passed to 					cipherInit invalid */#define     BAD_CIPHER_STATE   -5  /*  Cipher in wrong state (e.g., not 					initialized) */#define     BAD_BLOCK_LENGTH   -6 #define     BAD_CIPHER_INSTANCE   -7 /*  CHANGE POSSIBLE:  inclusion of algorithm specific defines  */#define     MAX_KEY_SIZE	64  /* # of ASCII char's needed to					represent a key */#define     MAX_IV_SIZE		32  /* # bytes needed to					represent an IV  *//*  Typedefs:	Typedef'ed data storage elements.  Add any algorithm specific parameters at the bottom of the structs as appropriate.*/typedef    unsigned char    BYTE;/*  The structure for key information */typedef struct {      BYTE  direction;	/*  Key used for encrypting or decrypting? */      int   keyLen;	/*  Length of the key  */      char  keyMaterial[MAX_KEY_SIZE+1];  /*  Raw key data in ASCII,                                    e.g., user input or KAT values */      /*  The following parameters are algorithm dependent, replace or      		add as necessary  */      int   blockLen;   /* block length */      word8 keySched[MAXROUNDS+1][4][4];	/* key schedule		*/      } keyInstance;/*  The structure for cipher information */typedef struct {  /* changed order of the components */      BYTE  mode;            /* MODE_ECB, MODE_CBC, or MODE_CFB1 */      BYTE  IV[MAX_IV_SIZE]; /* A possible Initialization Vector for       					ciphering */      /*  Add any algorithm specific parameters needed here  */      int   blockLen;    	/* Sample: Handles non-128 bit block sizes      					(if available) */      } cipherInstance;/*  Function protoypes  *//*  CHANGED: makeKey(): parameter blockLen added                        this parameter is absolutely necessary if you want to			setup the round keys in a variable block length setting 	     cipherInit(): parameter blockLen added (for obvious reasons)		 */int makeKey(keyInstance *key, BYTE direction, int keyLen, char *keyMaterial);int cipherInit(cipherInstance *cipher, BYTE mode, char *IV);int blockEncrypt(cipherInstance *cipher, keyInstance *key, BYTE *input, 			int inputLen, BYTE *outBuffer);int blockDecrypt(cipherInstance *cipher, keyInstance *key, BYTE *input,			int inputLen, BYTE *outBuffer);int cipherUpdateRounds(cipherInstance *cipher, keyInstance *key, BYTE *input,                         int inputLen, BYTE *outBuffer, int Rounds);