racoon.tproj/rijndael-api-fst.h

   1 /*      $KAME: rijndael-api-fst.h,v 1.6 2001/05/27 00:23:23 itojun Exp $        */
   2
   3 /*
   4  * rijndael-api-fst.h   v2.3   April '2000
   5  *
   6  * Optimised ANSI C code
   7  *
   8  * #define INTERMEDIATE_VALUE_KAT to generate the Intermediate Value Known Answer Test.
   9  */
  10
  11 #ifndef __RIJNDAEL_API_FST_H__
  12 #define __RIJNDAEL_API_FST_H__
  13
  14 #include <rijndael-alg-fst.h>
  15
  16 /*  Defines:
  17         Add any additional defines you need
  18 */
  19
  20 #define     DIR_ENCRYPT           0 /*  Are we encrpyting?  */
  21 #define     DIR_DECRYPT           1 /*  Are we decrpyting?  */
  22 #define     MODE_ECB              1 /*  Are we ciphering in ECB mode?   */
  23 #define     MODE_CBC              2 /*  Are we ciphering in CBC mode?   */
  24 #define     MODE_CFB1             3 /*  Are we ciphering in 1-bit CFB mode? */
  25 #define     TRUE                  1
  26 #define     FALSE                 0
  27 #define     BITSPERBLOCK        128 /* Default number of bits in a cipher block */
  28
  29 /*  Error Codes - CHANGE POSSIBLE: inclusion of additional error codes  */
  30 #define     BAD_KEY_DIR          -1 /*  Key direction is invalid, e.g., unknown value */
  31 #define     BAD_KEY_MAT          -2 /*  Key material not of correct length */
  32 #define     BAD_KEY_INSTANCE     -3 /*  Key passed is not valid */
  33 #define     BAD_CIPHER_MODE      -4 /*  Params struct passed to cipherInit invalid */
  34 #define     BAD_CIPHER_STATE     -5 /*  Cipher in wrong state (e.g., not initialized) */
  35 #define     BAD_BLOCK_LENGTH     -6
  36 #define     BAD_CIPHER_INSTANCE  -7
  37 #define     BAD_DATA             -8 /*  Data contents are invalid, e.g., invalid padding */
  38 #define     BAD_OTHER            -9 /*  Unknown error */
  39
  40 /*  CHANGE POSSIBLE:  inclusion of algorithm specific defines  */
  41 #define     MAX_KEY_SIZE         64 /* # of ASCII char's needed to represent a key */
  42 #define     MAX_IV_SIZE          16 /* # bytes needed to represent an IV  */
  43
  44 /*  Typedefs:
  45
  46         Typedef'ed data storage elements.  Add any algorithm specific
  47 parameters at the bottom of the structs as appropriate.
  48 */
  49
  50 /*  The structure for key information */
  51 typedef struct {
  52     u_int8_t  direction;            /* Key used for encrypting or decrypting? */
  53     int   keyLen;                   /* Length of the key  */
  54     char  keyMaterial[MAX_KEY_SIZE+1];  /* Raw key data in ASCII, e.g., user input or KAT values */
  55         /*  The following parameters are algorithm dependent, replace or add as necessary  */
  56         int   ROUNDS;                   /* key-length-dependent number of rounds */
  57     int   blockLen;                 /* block length */
  58     union {
  59         u_int8_t xkS8[RIJNDAEL_MAXROUNDS+1][4][4];      /* key schedule         */
  60         u_int32_t xkS32[RIJNDAEL_MAXROUNDS+1][4];       /* key schedule         */
  61     } xKeySched;
  62 #define keySched        xKeySched.xkS8
  63 } keyInstance;
  64
  65 /*  The structure for cipher information */
  66 typedef struct {                    /* changed order of the components */
  67     u_int8_t mode;                  /* MODE_ECB, MODE_CBC, or MODE_CFB1 */
  68     u_int8_t IV[MAX_IV_SIZE];       /* A possible Initialization Vector for ciphering */
  69         /*  Add any algorithm specific parameters needed here  */
  70     int   blockLen;                 /* Sample: Handles non-128 bit block sizes (if available) */
  71 } cipherInstance;
  72
  73 /*  Function prototypes  */
  74 /*  CHANGED: nothing
  75         TODO: implement the following extensions to setup 192-bit and 256-bit block lengths:
  76         makeKeyEx():    parameter blockLen added
  77                         -- this parameter is absolutely necessary if you want to
  78                         setup the round keys in a variable block length setting
  79             cipherInitEx(): parameter blockLen added (for obvious reasons)
  80  */
  81
  82 int rijndael_makeKey(keyInstance *key, u_int8_t direction, int keyLen, char *keyMaterial);
  83
  84 int rijndael_cipherInit(cipherInstance *cipher, u_int8_t mode, char *IV);
  85
  86 int rijndael_blockEncrypt(cipherInstance *cipher, keyInstance *key,
  87         u_int8_t *input, int inputLen, u_int8_t *outBuffer);
  88
  89 int rijndael_padEncrypt(cipherInstance *cipher, keyInstance *key,
  90                 u_int8_t *input, int inputOctets, u_int8_t *outBuffer);
  91
  92 int rijndael_blockDecrypt(cipherInstance *cipher, keyInstance *key,
  93         u_int8_t *input, int inputLen, u_int8_t *outBuffer);
  94
  95 int rijndael_padDecrypt(cipherInstance *cipher, keyInstance *key,
  96                 u_int8_t *input, int inputOctets, u_int8_t *outBuffer);
  97
  98 #ifdef INTERMEDIATE_VALUE_KAT
  99 int rijndael_cipherUpdateRounds(cipherInstance *cipher, keyInstance *key,
 100         u_int8_t *input, int inputLen, u_int8_t *outBuffer, int Rounds);
 101 #endif /* INTERMEDIATE_VALUE_KAT */
 102
 103 #endif /*  __RIJNDAEL_API_FST_H__ */
 104