md5a.h

这是一个使用MD5算法对字符串进行加密的小程序

// Md5A.h: interface for the CMd5A class.
//
//////////////////////////////////////////////////////////////////////

#if !defined(AFX_MD5A_H__56BDAD81_1478_11D5_80AC_0000E8810675__INCLUDED_)
#define AFX_MD5A_H__56BDAD81_1478_11D5_80AC_0000E8810675__INCLUDED_

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

#include <stdio.h>
#include <time.h>
#include <string.h>

#define MD 5

#ifndef PROTOTYPES
#define PROTOTYPES 0
#endif

typedef unsigned char *POINTER;   /* POINTER defines a generic pointer type */
typedef unsigned short int UINT2; /* UINT2 defines a two byte word */
typedef unsigned long int UINT4;  /* UINT4 defines a four byte word */

/*
  PROTO_LIST is defined depending on how PROTOTYPES is defined above.
  If using PROTOTYPES, then PROTO_LIST returns the list, otherwise it
  returns an empty list.
 */
//#if PROTOTYPES
//#define PROTO_LIST(list) list
//#else
//#define PROTO_LIST(list) ()
//#endif

 /* Length of test block, number of test blocks. */
#define TEST_BLOCK_LEN 1000
#define TEST_BLOCK_COUNT 1000

 /* Constants for MD5Transform routine. */
#define S11 7     /* 各轮左移的位数 */
#define S12 12
#define S13 17
#define S14 22
#define S21 5
#define S22 9
#define S23 14
#define S24 20
#define S31 4
#define S32 11
#define S33 16
#define S34 23
#define S41 6
#define S42 10
#define S43 15
#define S44 21

typedef struct 
{
  UINT4 state[4];               /* state (ABCD) */
  UINT4 count[2];               /* number of bits, modulo 2^64 (lsb first) */
  unsigned char buffer[64];     /* input buffer */
}MD5_CTX;

static unsigned char PADDING[64] = 
{
  0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
};

/* 
   F, G, H and I are basic MD5 functions.
*/
#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
#define H(x, y, z) ((x) ^ (y) ^ (z))
#define I(x, y, z) ((y) ^ ((x) | (~z)))

/* 
   ROTATE_LEFT rotates x left n bits.
*/
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))

/*
   FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
   Rotation is separate from addition to prevent recomputation.
*/
#define FF(a, b, c, d, x, s, ac) { \
 (a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \
 (a) = ROTATE_LEFT ((a), (s)); \
 (a) += (b); \
  }
#define GG(a, b, c, d, x, s, ac) { \
 (a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \
 (a) = ROTATE_LEFT ((a), (s)); \
 (a) += (b); \
  }
#define HH(a, b, c, d, x, s, ac) { \
 (a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \
 (a) = ROTATE_LEFT ((a), (s)); \
 (a) += (b); \
  }
#define II(a, b, c, d, x, s, ac) { \
 (a) += I ((b), (c), (d)) + (x) + (UINT4)(ac); \
 (a) = ROTATE_LEFT ((a), (s)); \
 (a) += (b); \
  }

class CMd5A  
{
public:
	CMd5A();
	virtual ~CMd5A();

public:
	char* MDString (char*);
	//char* MDFile (CString filename);
	CString MDFile(CString filename);
	char* hmac_md5(char* text, char* key);
	//char* MDString PROTO_LIST ((char *));
	//char* MDFile PROTO_LIST ((char *));

private:
	void MD5Init (MD5_CTX *context);
	void MD5Update(MD5_CTX *context, unsigned char *input,unsigned int inputLen);
	void MD5Final (unsigned char digest[16], MD5_CTX *context);
	void MD5Transform  (UINT4 [4], unsigned char [64]) ;
	void Encode(unsigned char *, UINT4 *, unsigned int);
	void Decode (UINT4 *, unsigned char *, unsigned int);
	void MD5_memcpy(POINTER, POINTER, unsigned int);
	void MD5_memset(POINTER, int, unsigned int);

	//LONG MD5_Os2ip(char* pstr);

};

#endif // !defined(AFX_MD5A_H__56BDAD81_1478_11D5_80AC_0000E8810675__INCLUDED_)