1 /*	$NetBSD: rijndael-api-fst.h,v 1.4 2006/09/09 16:22:36 manu Exp $	*/
2 
3 /*	$KAME: rijndael-api-fst.h,v 1.1.1.1 2001/08/08 09:56:27 sakane Exp $	*/
4 
5 /*
6  * rijndael-api-fst.h   v2.3   April '2000
7  *
8  * Optimised ANSI C code
9  *
10  * #define INTERMEDIATE_VALUE_KAT to generate the Intermediate Value Known Answer Test.
11  */
12 
13 #ifndef __RIJNDAEL_API_FST_H
14 #define __RIJNDAEL_API_FST_H
15 
16 #include <crypto/rijndael/rijndael-alg-fst.h>
17 
18 /*  Defines:
19 	Add any additional defines you need
20 */
21 
22 #define     DIR_ENCRYPT           0 /*  Are we encrpyting?  */
23 #define     DIR_DECRYPT           1 /*  Are we decrpyting?  */
24 #define     MODE_ECB              1 /*  Are we ciphering in ECB mode?   */
25 #define     MODE_CBC              2 /*  Are we ciphering in CBC mode?   */
26 #define     MODE_CFB1             3 /*  Are we ciphering in 1-bit CFB mode? */
27 #define     TRUE                  1
28 #define     FALSE                 0
29 #define     BITSPERBLOCK        128 /* Default number of bits in a cipher block */
30 
31 /*  Error Codes - CHANGE POSSIBLE: inclusion of additional error codes  */
32 #define     BAD_KEY_DIR          -1 /*  Key direction is invalid, e.g., unknown value */
33 #define     BAD_KEY_MAT          -2 /*  Key material not of correct length */
34 #define     BAD_KEY_INSTANCE     -3 /*  Key passed is not valid */
35 #define     BAD_CIPHER_MODE      -4 /*  Params struct passed to cipherInit invalid */
36 #define     BAD_CIPHER_STATE     -5 /*  Cipher in wrong state (e.g., not initialized) */
37 #define     BAD_BLOCK_LENGTH     -6
38 #define     BAD_CIPHER_INSTANCE  -7
39 #define     BAD_DATA             -8 /*  Data contents are invalid, e.g., invalid padding */
40 #define     BAD_OTHER            -9 /*  Unknown error */
41 
42 /*  CHANGE POSSIBLE:  inclusion of algorithm specific defines  */
43 #define     MAX_KEY_SIZE         64 /* # of ASCII char's needed to represent a key */
44 #define     MAX_IV_SIZE          16 /* # bytes needed to represent an IV  */
45 
46 /*  Typedefs:
47 
48 	Typedef'ed data storage elements.  Add any algorithm specific
49 parameters at the bottom of the structs as appropriate.
50 */
51 
52 /*  The structure for key information */
53 typedef struct {
54     u_int8_t  direction;            /* Key used for encrypting or decrypting? */
55     int   keyLen;                   /* Length of the key  */
56     char  keyMaterial[MAX_KEY_SIZE+1];  /* Raw key data in ASCII, e.g., user input or KAT values */
57         /*  The following parameters are algorithm dependent, replace or add as necessary  */
58 	int   ROUNDS;                   /* key-length-dependent number of rounds */
59     int   blockLen;                 /* block length */
60     union {
61     	u_int8_t xkS8[RIJNDAEL_MAXROUNDS+1][4][4];	/* key schedule		*/
62     	u_int32_t xkS32[RIJNDAEL_MAXROUNDS+1][4];	/* key schedule		*/
63     } xKeySched;
64 #define	keySched	xKeySched.xkS8
65 } keyInstance;
66 
67 /*  The structure for cipher information */
68 typedef struct {                    /* changed order of the components */
69     u_int8_t mode;                  /* MODE_ECB, MODE_CBC, or MODE_CFB1 */
70     u_int8_t IV[MAX_IV_SIZE];       /* A possible Initialization Vector for ciphering */
71         /*  Add any algorithm specific parameters needed here  */
72     int   blockLen;                 /* Sample: Handles non-128 bit block sizes (if available) */
73 } cipherInstance;
74 
75 /*  Function prototypes  */
76 /*  CHANGED: nothing
77 	TODO: implement the following extensions to setup 192-bit and 256-bit block lengths:
78         makeKeyEx():    parameter blockLen added
79                         -- this parameter is absolutely necessary if you want to
80                         setup the round keys in a variable block length setting
81 	    cipherInitEx(): parameter blockLen added (for obvious reasons)
82  */
83 
84 int rijndael_makeKey(keyInstance *key, u_int8_t direction, int keyLen, char *keyMaterial);
85 
86 int rijndael_cipherInit(cipherInstance *cipher, u_int8_t mode, char *IV);
87 
88 int rijndael_blockEncrypt(cipherInstance *cipher, keyInstance *key,
89         u_int8_t *input, int inputLen, u_int8_t *outBuffer);
90 
91 int rijndael_padEncrypt(cipherInstance *cipher, keyInstance *key,
92 		u_int8_t *input, int inputOctets, u_int8_t *outBuffer);
93 
94 int rijndael_blockDecrypt(cipherInstance *cipher, keyInstance *key,
95         u_int8_t *input, int inputLen, u_int8_t *outBuffer);
96 
97 int rijndael_padDecrypt(cipherInstance *cipher, keyInstance *key,
98 		u_int8_t *input, int inputOctets, u_int8_t *outBuffer);
99 
100 #ifdef INTERMEDIATE_VALUE_KAT
101 int rijndael_cipherUpdateRounds(cipherInstance *cipher, keyInstance *key,
102         u_int8_t *input, int inputLen, u_int8_t *outBuffer, int Rounds);
103 #endif /* INTERMEDIATE_VALUE_KAT */
104 
105 #endif /*  __RIJNDAEL_API_FST_H */
106