FreeBSD/Linux Kernel Cross Reference
sys/crypto/rijndael/rijndael-api-fst.h

     /*      $FreeBSD: releng/5.0/sys/crypto/rijndael/rijndael-api-fst.h 95192 2002-04-21 10:32:48Z markm $  */
     /*      $KAME: rijndael-api-fst.h,v 1.6 2001/05/27 00:23:23 itojun Exp $        */
     
     /*
      * rijndael-api-fst.h   v2.3   April '2000
      *
      * Optimised ANSI C code
      *
      * #define INTERMEDIATE_VALUE_KAT to generate the Intermediate Value Known Answer Test.
     */
    
    #ifndef __RIJNDAEL_API_FST_H
    #define __RIJNDAEL_API_FST_H
    
    #include <crypto/rijndael/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     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
    #define     BAD_DATA             -8 /*  Data contents are invalid, e.g., invalid padding */
    #define     BAD_OTHER            -9 /*  Unknown error */
    
    /*  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          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.
    */
    
    /*  The structure for key information */
    typedef struct {
        u_int8_t  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   ROUNDS;                   /* key-length-dependent number of rounds */
        int   blockLen;                 /* block length */
        union {
            u_int8_t xkS8[RIJNDAEL_MAXROUNDS+1][4][4];      /* key schedule         */
            u_int32_t xkS32[RIJNDAEL_MAXROUNDS+1][4];       /* key schedule         */
        } xKeySched;
    #define keySched        xKeySched.xkS8
    } keyInstance;
    
    /*  The structure for cipher information */
    typedef struct {                    /* changed order of the components */
        u_int8_t mode;                  /* MODE_ECB, MODE_CBC, or MODE_CFB1 */
        u_int8_t 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 prototypes  */
    /*  CHANGED: nothing
            TODO: implement the following extensions to setup 192-bit and 256-bit block lengths:
            makeKeyEx():    parameter blockLen added
                            -- this parameter is absolutely necessary if you want to
                            setup the round keys in a variable block length setting 
                cipherInitEx(): parameter blockLen added (for obvious reasons)              
     */
    
    int rijndael_makeKey(keyInstance *key, u_int8_t direction, int keyLen, char *keyMaterial);
    
    int rijndael_cipherInit(cipherInstance *cipher, u_int8_t mode, char *IV);
    
    int rijndael_blockEncrypt(cipherInstance *cipher, keyInstance *key,
            u_int8_t *input, int inputLen, u_int8_t *outBuffer);
    
    int rijndael_padEncrypt(cipherInstance *cipher, keyInstance *key,
                    u_int8_t *input, int inputOctets, u_int8_t *outBuffer);
    
    int rijndael_blockDecrypt(cipherInstance *cipher, keyInstance *key,
            u_int8_t *input, int inputLen, u_int8_t *outBuffer);
    
    int rijndael_padDecrypt(cipherInstance *cipher, keyInstance *key,
                    u_int8_t *input, int inputOctets, u_int8_t *outBuffer);
    
    #ifdef INTERMEDIATE_VALUE_KAT
    int rijndael_cipherUpdateRounds(cipherInstance *cipher, keyInstance *key,
            u_int8_t *input, int inputLen, u_int8_t *outBuffer, int Rounds);
   #endif /* INTERMEDIATE_VALUE_KAT */
   
   #endif /*  __RIJNDAEL_API_FST_H */

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