md5.h

一份加密算法的源代码

/*****************************************************************
*
* Reversed By yykingking ([e-mail])
* 仅供学习交流使用
*****************************************************************/


#ifndef _MD5_H_
#define _MD5_H_


#include <stdio.h>

typedef unsigned long UINT4;
//typedef unsigned long UINT;
typedef unsigned char *POINTER;

typedef struct _MD5_CONTEXT_
{
	UINT	state[4];
	UINT	count[2];
	unsigned char buffer[64];	
}MD5CONTEXT, *PMD5CONTEXT;


#define md5_F(x, y, z) (((x) & (y)) | ((~x) & (z)))
#define md5_G(x, y, z) (((x) & (z)) | ((y) & (~z)))
#define md5_H(x, y, z) ((x) ^ (y) ^ (z))
#define md5_I(x, y, z) ((y) ^ ((x) | (~z)))

// ROTATE_LEFT rotates x left n bits.
// x<<<=n;
#define md5_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) += md5_F ((b), (c), (d)) + (x) + (ac); \
	(a) = md5_ROTATE_LEFT ((a), (s)); \
	(a) += (b); \
}
#define GG(a, b, c, d, x, s, ac) { \
	(a) += md5_G ((b), (c), (d)) + (x) + (ac); \
	(a) = md5_ROTATE_LEFT ((a), (s)); \
	(a) += (b); \
}
#define HH(a, b, c, d, x, s, ac) { \
	(a) += md5_H ((b), (c), (d)) + (x) + (ac); \
	(a) = md5_ROTATE_LEFT ((a), (s)); \
	(a) += (b); \
}
#define II(a, b, c, d, x, s, ac) { \
	(a) += md5_I ((b), (c), (d)) + (x) + (ac); \
	(a) = md5_ROTATE_LEFT ((a), (s)); \
	(a) += (b); \
}

#endif