/* $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 /* 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 #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__ */