crypt_aes.h

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#ifndef __RIJNDAEL_API_FST_H
#define __RIJNDAEL_API_FST_H
 
#include <stdio.h>
#include "crypt_aes_impl.h"
 
/*  Generic Defines  */
#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  */
#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
#define     BAD_DATA             -8 /*  Data contents are invalid, e.g., invalid padding */
#define     BAD_OTHER            -9 /*  Unknown error */
 
/*  Algorithm-specific Defines  */
#define     MAX_KEY_SIZE         64 /* # of ASCII char's needed to represent a key */
#define     MAX_IV_SIZE          16 /* # bytes needed to represent an IV  */
 
/*  Typedefs  */
 
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 */
        int   Nr;                       /* key-length-dependent number of rounds */
        u32   rk[4*(MAXNR + 1)];        /* key schedule */
        u32   ek[4*(MAXNR + 1)];        /* CFB1 key schedule (encryption only) */
} 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 */
} cipherInstance;
 
/*  Function prototypes  */
 
int makeKey(keyInstance *key, BYTE direction, int keyLen, const char *keyMaterial);
 
int cipherInit(cipherInstance *cipher, BYTE mode, char *IV);
 
int blockEncrypt(cipherInstance *cipher, keyInstance *key,
        BYTE *input, int inputLen, BYTE *outBuffer);
 
int padEncrypt(cipherInstance *cipher, keyInstance *key,
                BYTE *input, int inputOctets, BYTE *outBuffer);
 
int blockDecrypt(cipherInstance *cipher, keyInstance *key,
        BYTE *input, int inputLen, BYTE *outBuffer);
 
int padDecrypt(cipherInstance *cipher, keyInstance *key,
                BYTE *input, int inputOctets, BYTE *outBuffer);
 
int cipherUpdateRounds(cipherInstance *cipher, keyInstance *key,
        BYTE *input, int inputLen, BYTE *outBuffer, int Rounds);
 
#endif /* __RIJNDAEL_API_FST_H */