Rijndael.h

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#include <stdio.h>

#ifndef __RIJNDAEL_ALG_H
#define __RIJNDAEL_ALG_H

#define MAXKC                           (256/32)
#define MAXROUNDS                       14

typedef unsigned char           word8;  
typedef unsigned short          word16; 
typedef unsigned int            word32;

int rijndaelKeySched (word8 k[MAXKC][4], int keyBits,  
                word8 rk[MAXROUNDS+1][4][4]);
int rijndaelKeyEnctoDec (int keyBits, word8 W[MAXROUNDS+1][4][4]);
int rijndaelEncrypt (word8 a[16], word8 b[16], 
                word8 rk[MAXROUNDS+1][4][4]);
int rijndaelEncryptRound (word8 a[4][4],  
                word8 rk[MAXROUNDS+1][4][4], int rounds);
int rijndaelDecrypt (word8 a[16], word8 b[16],
                word8 rk[MAXROUNDS+1][4][4]);
int rijndaelDecryptRound (word8 a[4][4],  
                word8 rk[MAXROUNDS+1][4][4], int rounds);

#endif

// End of algorithm headers.  begin the AES API header defs


#ifndef __RIJNDAEL_API_H
#define __RIJNDAEL_API_H

// rijndael-api-fst.h   v2.0   August '99
// Optimised ANSI C code


//  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?
#ifndef TRUE
#define     TRUE            1
#endif
#ifndef FALSE
#define     FALSE           0
#endif
#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 
// 14.Dec.2005 Cirilo: keys are now unsigned char rather than hex (ASCII)
#define     MAX_KEY_SIZE        32  // # of unsigned char's needed to represent a key
#define     MAX_IV_SIZE         16  // # 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;  
      int   keyLen;     
      char  keyMaterial[MAX_KEY_SIZE+1];  

      int   blockLen;   
      word8 keySched[MAXROUNDS+1][4][4];        
      } keyInstance;

//  The structure for cipher information
typedef struct {  // changed order of the components
      BYTE  mode;            
      BYTE  IV[MAX_IV_SIZE]; 
      //  Add any algorithm specific parameters needed here 
      int   blockLen;           
      } 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);


#endif // __RIJNDAEL_API_H