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