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rngapifst.h
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/* Copyright (c) 2002,2003 Sam Trenholme
*
* TERMS
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* This software is provided 'as is' with no guarantees of correctness or
* fitness for purpose.
*
* Note that this copyrighted code is based on public domain code
*/
/**
* rng-api-fst.h
*
* @version 2.9 (December 2000)
*
* Note: This is a Rijndael variant.
*
* @author Vincent Rijmen <[email protected]>
* @author Antoon Bosselaers <[email protected]>
* @author Paulo Barreto <[email protected]>
*
* This code is hereby placed in the public domain.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS ''AS IS'' AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Acknowledgements:
*
* We are deeply indebted to the following people for their bug reports,
* fixes, and improvement suggestions to this implementation. Though we
* tried to list all contributions, we apologise in advance for any
* missing reference.
*
* Andrew Bales <[email protected]>
* Markus Friedl <[email protected]>
* John Skodon <[email protected]>
*/
#ifndef __RIJNDAEL_API_FST_H
#define __RIJNDAEL_API_FST_H
#include <stdio.h>
#include "rngalgfst.h"
/* Generic Defines */
#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 */
#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 */
/* 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 unsigned char MARA_BYTE;
/* The structure for key information */
typedef struct {
MARA_BYTE 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 */
int Nr; /* key-length-dependent number of rounds */
u32 rk[4*(MAXNR + 1)]; /* key schedule */
u32 ek[4*(MAXNR + 1)]; /* CFB1 key schedule (encryption only) */
} keyInstance;
/* The structure for cipher information */
typedef struct { /* changed order of the components */
MARA_BYTE mode; /* MODE_ECB, MODE_CBC, or MODE_CFB1 */
MARA_BYTE IV[MAX_IV_SIZE]; /* A possible Initialization Vector for ciphering */
} cipherInstance;
/* Function prototypes */
int makeKey(keyInstance *key, MARA_BYTE direction, int keyLen, char *keyMaterial);
int cipherInit(cipherInstance *cipher, MARA_BYTE mode, char *IV);
int blockEncrypt(cipherInstance *cipher, keyInstance *key,
MARA_BYTE *input, int inputLen, MARA_BYTE *outBuffer);
int padEncrypt(cipherInstance *cipher, keyInstance *key,
MARA_BYTE *input, int inputOctets, MARA_BYTE *outBuffer);
int blockDecrypt(cipherInstance *cipher, keyInstance *key,
MARA_BYTE *input, int inputLen, MARA_BYTE *outBuffer);
int padDecrypt(cipherInstance *cipher, keyInstance *key,
MARA_BYTE *input, int inputOctets, MARA_BYTE *outBuffer);
#ifdef INTERMEDIATE_VALUE_KAT
int cipherUpdateRounds(cipherInstance *cipher, keyInstance *key,
MARA_BYTE *input, int inputLen, MARA_BYTE *outBuffer, int Rounds);
#endif /* INTERMEDIATE_VALUE_KAT */
#endif /* __RIJNDAEL_API_FST_H */