rijndael.h

这是一个文件加密解密的程序

// rijndael.h: interface for the rijndael class.
//
//////////////////////////////////////////////////////////////////////

#if !defined(AFX_RIJNDAEL_H__65AE854C_7E77_4488_AC14_66161F67B341__INCLUDED_)
#define AFX_RIJNDAEL_H__65AE854C_7E77_4488_AC14_66161F67B341__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000

typedef unsigned char   u1byte; /* an 8 bit unsigned character type */
typedef unsigned short  u2byte; /* a 16 bit unsigned integer type   */
typedef unsigned long   u4byte; /* a 32 bit unsigned integer type   */

typedef signed char     s1byte; /* an 8 bit signed character type   */
typedef signed short    s2byte; /* a 16 bit signed integer type     */
typedef signed long     s4byte; /* a 32 bit signed integer type     */

/* 2. Standard interface for AES cryptographic routines             */

/* These are all based on 32 bit unsigned values and may require    */
/* endian conversion for big-endian architectures                   */

#define	LITTLE_ENDIAN

class AES
{
public:
	virtual void set_key(const u1byte key[], const u4byte key_bits) = 0;
	virtual void encrypt(const u1byte in_blk[16], u1byte out_blk[16]) = 0;
	virtual void decrypt(const u1byte in_blk[16], u1byte out_blk[16]) = 0;
};	 

/* 3. Basic macros for speeding up generic operations               */

/* Circular rotate of 32 bit values                                 */

#ifdef _MSC_VER

#  include <stdlib.h>
#  pragma intrinsic(_lrotr,_lrotl)
#  define rotr(x,n) _lrotr(x,n)
#  define rotl(x,n) _lrotl(x,n)

#else

#define rotr(x,n)   (((x) >> ((int)(n))) | ((x) << (32 - (int)(n))))
#define rotl(x,n)   (((x) << ((int)(n))) | ((x) >> (32 - (int)(n))))

#endif

/* Invert byte order in a 32 bit variable                           */

#define bswap(x)    (rotl(x, 8) & 0x00ff00ff | rotr(x, 8) & 0xff00ff00)

/* Extract byte from a 32 bit quantity (little endian notation)     */ 

#define byte(x,n)   ((u1byte)((x) >> (8 * n)))

/* Input or output a 32 bit word in machine order					*/

#ifdef	LITTLE_ENDIAN

#define	u4byte_in(x)		(*(u4byte*)(x))
#define	u4byte_out(x, v)	(*(u4byte*)(x) = (v)) 

#else

#define	u4byte_in(x)		bswap(*(u4byte)(x))
#define	u4byte_out(x, v)	(*(u4byte*)(x) = bswap(v)) 

#endif




class rijndael  
{
public:
	rijndael();
	virtual ~rijndael();
public:
	char *name(void);
	void set_key(const u1byte key[], const u4byte key_len);
	void encrypt(const u1byte in_blk[16], u1byte out_blk[16]);
	void decrypt(const u1byte in_blk[16], u1byte out_blk[16]);


private:
	u4byte  k_len;
	u4byte  e_key[64];
	u4byte  d_key[64];

};

	 

#endif // !defined(AFX_RIJNDAEL_H__65AE854C_7E77_4488_AC14_66161F67B341__INCLUDED_)