1 | /*
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2 | * rijndael-api-fst.h v2.3 April '2000
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3 | *
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4 | * Optimised ANSI C code
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5 | *
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6 | */
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7 |
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8 | #ifndef __RIJNDAEL_API_FST_H
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9 | #define __RIJNDAEL_API_FST_H
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10 |
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11 | #include "rijndael-alg-fst.h"
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12 |
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13 | /* Defines:
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14 | Add any additional defines you need
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15 | */
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16 |
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17 | #define BNUM 1
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18 | #define B_SIZ 16
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19 | #define STRICT_ALIGN 1 /* For safety */
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20 |
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21 |
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22 | #define DIR_ENCRYPT 0 /* Are we encrpyting? */
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23 | #define DIR_DECRYPT 1 /* Are we decrpyting? */
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24 | #define MODE_ECB 1 /* Are we ciphering in ECB mode? */
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25 | #define MODE_CBC 2 /* Are we ciphering in CBC mode? */
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26 | #define MODE_CFB1 3 /* Are we ciphering in 1-bit CFB mode? */
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27 | #ifndef TRUE
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28 | #define TRUE 1
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29 | #endif
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30 | #ifndef FALSE
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31 | #define FALSE 0
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32 | #endif
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33 | #define BITSPERBLOCK 128 /* Default number of bits in a cipher block */
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34 |
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35 | /* Error Codes - CHANGE POSSIBLE: inclusion of additional error codes */
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36 |
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37 | #define BAD_KEY_DIR -1 /* Key direction is invalid, e.g., unknown value */
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38 | #define BAD_KEY_MAT -2 /* Key material not of correct length */
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39 | #define BAD_KEY_INSTANCE -3 /* Key passed is not valid */
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40 | #define BAD_CIPHER_MODE -4 /* Params struct passed to cipherInit invalid */
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41 | #define BAD_CIPHER_STATE -5 /* Cipher in wrong state (e.g., not initialized) */
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42 | #define BAD_BLOCK_LENGTH -6
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43 | #define BAD_CIPHER_INSTANCE -7
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44 | #define BAD_DATA -8 /* Data contents are invalid, e.g., invalid padding */
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45 | #define BAD_OTHER -9 /* Unknown error */
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46 |
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47 | /* CHANGE POSSIBLE: inclusion of algorithm specific defines */
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48 | #define MAX_KEY_SIZE 64 /* # of ASCII char's needed to represent a key */
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49 | #define MAX_IV_SIZE 16 /* # bytes needed to represent an IV */
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50 |
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51 | #ifdef SH_ENCRYPT
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52 |
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53 | /* Typedefs:
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54 |
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55 | Typedef'ed data storage elements. Add any algorithm specific
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56 | parameters at the bottom of the structs as appropriate.
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57 | */
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58 |
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59 | typedef unsigned char RIJ_BYTE;
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60 |
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61 | /* The structure for key information */
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62 | typedef struct {
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63 | RIJ_BYTE direction; /* Key used for encrypting or decrypting? */
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64 | int keyLen; /* Length of the key */
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65 | char keyMaterial[MAX_KEY_SIZE+1]; /* Raw key data in ASCII, e.g., user input or KAT values */
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66 | /* The following parameters are algorithm dependent, replace or add as necessary */
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67 | int ROUNDS; /* key-length-dependent number of rounds */
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68 | int blockLen; /* block length */
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69 | word8 keySched[MAXROUNDS+1][4][4]; /* key schedule */
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70 | } keyInstance;
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71 |
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72 | /* The structure for cipher information */
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73 | typedef struct { /* changed order of the components */
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74 | RIJ_BYTE mode; /* MODE_ECB, MODE_CBC, or MODE_CFB1 */
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75 | RIJ_BYTE IV[MAX_IV_SIZE]; /* A possible Initialization Vector for ciphering */
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76 | /* Add any algorithm specific parameters needed here */
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77 | int blockLen; /* Sample: Handles non-128 bit block sizes (if available) */
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78 | } cipherInstance;
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79 |
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80 | /* Function prototypes */
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81 | /* CHANGED: nothing
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82 | TODO: implement the following extensions to setup 192-bit and 256-bit block lengths:
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83 | makeKeyEx(): parameter blockLen added
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84 | -- this parameter is absolutely necessary if you want to
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85 | setup the round keys in a variable block length setting
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86 | cipherInitEx(): parameter blockLen added (for obvious reasons)
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87 | */
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88 |
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89 | int makeKey(keyInstance *key, RIJ_BYTE direction, int keyLen, char *keyMaterial);
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90 |
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91 | int cipherInit(cipherInstance *cipher, RIJ_BYTE mode, char *IV);
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92 |
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93 | int blockEncrypt(cipherInstance *cipher, keyInstance *key,
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94 | RIJ_BYTE *input, int inputLen, RIJ_BYTE *outBuffer);
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95 |
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96 | int blockDecrypt(cipherInstance *cipher, keyInstance *key,
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97 | RIJ_BYTE *input, int inputLen, RIJ_BYTE *outBuffer);
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98 |
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99 | /* SH_ENCRYPT */
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100 | #endif
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101 |
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102 | /* __RIJNDAEL_API_FST_H */
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103 | #endif
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