twofish.h

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/* 
 * Fast, portable, and easy-to-use Twofish implementation,  
 * Version 0.3. 
 * Copyright (c) 2002 by Niels Ferguson. 
 * 
 * See the twofish.c file for the details of the how and why of this code. 
 * 
 * The author hereby grants a perpetual license to everybody to 
 * use this code for any purpose as long as the copyright message is included 
 * in the source code of this or any derived work. 
 */ 
 
 
/* 
 * PLATFORM FIXES 
 * ============== 
 * 
 * The following definitions have to be fixed for each particular platform  
 * you work on. If you have a multi-platform program, you no doubt have  
 * portable definitions that you can substitute here without changing  
 * the rest of the code. 
 * 
 * The defaults provided here should work on most PC compilers. 
 */ 
#ifndef _TWOFISH_H
#define _TWOFISH_H

#ifdef __cplusplus
extern "C"
{
#endif

 
typedef unsigned char   Twofish_Byte; 
 
typedef unsigned int    Twofish_UInt32; 
 
 
/* 
 * END OF PLATFORM FIXES 
 * ===================== 
 *  
 * You should not have to touch the rest of this file, but the code 
 * in twofish.c has a few things you need to fix too. 
 */ 

#define SUCCESS          1
#define ERR_UINT32      -2
#define ERR_BYTE        -3
#define ERR_GET32       -4
#define ERR_PUT32       -5
#define ERR_ROLR        -6
#define ERR_BSWAP       -7
#define ERR_SELECTB     -8
#define ERR_TEST_ENC    -9
#define ERR_TEST_DEC   -10
#define ERR_SEQ_ENC    -11
#define ERR_SEQ_DEC    -12
#define ERR_ODD_KEY    -13
#define ERR_INIT       -14
#define ERR_KEY_LEN    -15
#define ERR_ILL_ARG    -16


typedef  
    struct  
        { 
        Twofish_UInt32 s[4][256];   /* pre-computed S-boxes */ 
        Twofish_UInt32 K[40];       /* Round key words */ 
        } 
    Twofish_key; 
 
 
extern int Twofish_initialise(); 
 
 
extern int Twofish_prepare_key(  
                                Twofish_Byte key[], 
                                int key_len,  
                                Twofish_key * xkey   
                                ); 
 
 
extern void Twofish_encrypt(  
                            Twofish_key * xkey, 
                            Twofish_Byte p[16],  
                            Twofish_Byte c[16] 
                            ); 
 
 
extern void Twofish_decrypt(  
                            Twofish_key * xkey, 
                            Twofish_Byte c[16],  
                            Twofish_Byte p[16] 
                            ); 

#ifdef __cplusplus
}
#endif
#endif