md5.cpp

酒店管理系统 包括入库 订房退房等功能 管理员的权限

// MD5.cpp: implementation of the CMD5 class.
//
//////////////////////////////////////////////////////////////////////

#include "stdafx.h"
#include "MD5.h"

#ifdef _DEBUG
#undef THIS_FILE
static char THIS_FILE[]=__FILE__;
#define new DEBUG_NEW
#endif

//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////
/* 4个辅助函数 F, G, H and I */
#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)))


/* 定义ROTATE_LEFT为x 左移 n bits. */
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))

// FF, GG, HH和II分别为第1, 2, 3, 4轮循环的辅助函数.
#define FF(a, b, c, d, x, s, ac) { \
 (a) += F ((b), (c), (d)) + (x) + (DWORD)(ac); \
 (a) = ROTATE_LEFT ((a), (s)); \
 (a) += (b); \
  }
#define GG(a, b, c, d, x, s, ac) { \
 (a) += G ((b), (c), (d)) + (x) + (DWORD)(ac); \
 (a) = ROTATE_LEFT ((a), (s)); \
 (a) += (b); \
  }
#define HH(a, b, c, d, x, s, ac) { \
 (a) += H ((b), (c), (d)) + (x) + (DWORD)(ac); \
 (a) = ROTATE_LEFT ((a), (s)); \
 (a) += (b); \
  }
#define II(a, b, c, d, x, s, ac) { \
 (a) += I ((b), (c), (d)) + (x) + (DWORD)(ac); \
 (a) = ROTATE_LEFT ((a), (s)); \
 (a) += (b); \
  }

CMD5::CMD5()
{

}

CMD5::~CMD5()
{

}



//增加填充数组 增加padding使得数据长度（bit为单位）模512为448
static BYTE 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
};

//MD5循环
void CMD5::MD5Transform(DWORD state[4], BYTE block[4])
{
	DWORD a = state[0], b = state[1], c = state[2], d = state[3], x[16];

	Decode (x, block, 64);

    /* 第一轮循环 */
	FF (a, b, c, d, x[ 0], 7, 0xd76aa478); /* 1 */
	FF (d, a, b, c, x[ 1], 12, 0xe8c7b756); /* 2 */
	FF (c, d, a, b, x[ 2], 17, 0x242070db); /* 3 */
	FF (b, c, d, a, x[ 3], 22, 0xc1bdceee); /* 4 */
	FF (a, b, c, d, x[ 4], 7, 0xf57c0faf); /* 5 */
	FF (d, a, b, c, x[ 5], 12, 0x4787c62a); /* 6 */
	FF (c, d, a, b, x[ 6], 17, 0xa8304613); /* 7 */
	FF (b, c, d, a, x[ 7], 22, 0xfd469501); /* 8 */
	FF (a, b, c, d, x[ 8], 7, 0x698098d8); /* 9 */
	FF (d, a, b, c, x[ 9], 12, 0x8b44f7af); /* 10 */
	FF (c, d, a, b, x[10], 17, 0xffff5bb1); /* 11 */
	FF (b, c, d, a, x[11], 22, 0x895cd7be); /* 12 */
	FF (a, b, c, d, x[12], 7, 0x6b901122); /* 13 */
	FF (d, a, b, c, x[13], 12, 0xfd987193); /* 14 */
	FF (c, d, a, b, x[14], 17, 0xa679438e); /* 15 */
	FF (b, c, d, a, x[15], 22, 0x49b40821); /* 16 */

	/* 第二轮循环 */
	GG (a, b, c, d, x[ 1], 5, 0xf61e2562); /* 17 */
	GG (d, a, b, c, x[ 6], 9, 0xc040b340); /* 18 */
	GG (c, d, a, b, x[11], 14, 0x265e5a51); /* 19 */
	GG (b, c, d, a, x[ 0], 20, 0xe9b6c7aa); /* 20 */
	GG (a, b, c, d, x[ 5], 5, 0xd62f105d); /* 21 */
	GG (d, a, b, c, x[10], 9,  0x2441453); /* 22 */
	GG (c, d, a, b, x[15], 14, 0xd8a1e681); /* 23 */
	GG (b, c, d, a, x[ 4], 20, 0xe7d3fbc8); /* 24 */
	GG (a, b, c, d, x[ 9], 5, 0x21e1cde6); /* 25 */
	GG (d, a, b, c, x[14], 9, 0xc33707d6); /* 26 */
	GG (c, d, a, b, x[ 3], 14, 0xf4d50d87); /* 27 */
	GG (b, c, d, a, x[ 8], 20, 0x455a14ed); /* 28 */
	GG (a, b, c, d, x[13], 5, 0xa9e3e905); /* 29 */
	GG (d, a, b, c, x[ 2], 9, 0xfcefa3f8); /* 30 */
	GG (c, d, a, b, x[ 7], 14, 0x676f02d9); /* 31 */
	GG (b, c, d, a, x[12], 20, 0x8d2a4c8a); /* 32 */

    /* 第三轮循环 */
	HH (a, b, c, d, x[ 5], 4, 0xfffa3942); /* 33 */
	HH (d, a, b, c, x[ 8], 11, 0x8771f681); /* 34 */
	HH (c, d, a, b, x[11], 16, 0x6d9d6122); /* 35 */
	HH (b, c, d, a, x[14], 23, 0xfde5380c); /* 36 */
	HH (a, b, c, d, x[ 1], 4, 0xa4beea44); /* 37 */
	HH (d, a, b, c, x[ 4], 11, 0x4bdecfa9); /* 38 */
	HH (c, d, a, b, x[ 7], 16, 0xf6bb4b60); /* 39 */
	HH (b, c, d, a, x[10], 23, 0xbebfbc70); /* 40 */
	HH (a, b, c, d, x[13], 4, 0x289b7ec6); /* 41 */
	HH (d, a, b, c, x[ 0], 11, 0xeaa127fa); /* 42 */
	HH (c, d, a, b, x[ 3], 16, 0xd4ef3085); /* 43 */
	HH (b, c, d, a, x[ 6], 23,  0x4881d05); /* 44 */
	HH (a, b, c, d, x[ 9], 4, 0xd9d4d039); /* 45 */
	HH (d, a, b, c, x[12], 11, 0xe6db99e5); /* 46 */
	HH (c, d, a, b, x[15], 16, 0x1fa27cf8); /* 47 */
	HH (b, c, d, a, x[ 2], 23, 0xc4ac5665); /* 48 */

	 /* 第四轮循环 */
	II (a, b, c, d, x[ 0], 6, 0xf4292244); /* 49 */
	II (d, a, b, c, x[ 7], 10, 0x432aff97); /* 50 */
	II (c, d, a, b, x[14], 15, 0xab9423a7); /* 51 */
	II (b, c, d, a, x[ 5], 21, 0xfc93a039); /* 52 */
	II (a, b, c, d, x[12], 6, 0x655b59c3); /* 53 */
	II (d, a, b, c, x[ 3], 10, 0x8f0ccc92); /* 54 */
	II (c, d, a, b, x[10], 15, 0xffeff47d); /* 55 */
	II (b, c, d, a, x[ 1], 21, 0x85845dd1); /* 56 */
	II (a, b, c, d, x[ 8], 6, 0x6fa87e4f); /* 57 */
	II (d, a, b, c, x[15], 10, 0xfe2ce6e0); /* 58 */
	II (c, d, a, b, x[ 6], 15, 0xa3014314); /* 59 */
	II (b, c, d, a, x[13], 21, 0x4e0811a1); /* 60 */
	II (a, b, c, d, x[ 4], 6, 0xf7537e82); /* 61 */
	II (d, a, b, c, x[11], 10, 0xbd3af235); /* 62 */
	II (c, d, a, b, x[ 2], 15, 0x2ad7d2bb); /* 63 */
	II (b, c, d, a, x[ 9], 21, 0xeb86d391); /* 64 */

    state[0] += a;
	state[1] += b;
	state[2] += c;
	state[3] += d;

    /* 敏感信息清空*/
	MD5_memset ((BYTE *)x, 0, sizeof (x));
}

//MD5初始化变量
void CMD5::MD5Init(MD5 *context)
{
	context->count[0] = context->count[1] = 0;	
	context->state[0] = 0x67452301;
	context->state[1] = 0xefcdab89;
	context->state[2] = 0x98badcfe;
	context->state[3] = 0x10325476;
}

//MD5 修正操作
void CMD5::MD5Update(MD5 *context, BYTE *input, DWORD inputLen)
{
	DWORD i, index, partLen;

	/* 计算 number of bytes mod 64 */
	index = (DWORD)((context->count[0] >> 3) & 0x3F);

	/* 修正bits数 */
	if ((context->count[0] += ((DWORD)inputLen << 3))
			< ((DWORD)inputLen << 3))
		context->count[1]++;
	context->count[1] += ((DWORD)inputLen >> 29);

	partLen = 64 - index;

	/* Transform as many times as possible.*/
	if (inputLen >= partLen) 
	{
		MD5_memcpy((BYTE *)&context->buffer[index], (BYTE *)input, partLen);
		MD5Transform (context->state, context->buffer);

		for (i = partLen; i + 63 < inputLen; i += 64)
			MD5Transform (context->state, &input[i]);

		index = 0;
	}
	else
		i = 0;

	/* 向缓冲器中保存输入信息*/
	MD5_memcpy((BYTE *)&context->buffer[index], (BYTE *)&input[i], inputLen-i);
}

//加密
void CMD5::Encode(BYTE *output, DWORD *input, DWORD len)
{
	DWORD i, j;

	for (i = 0, j = 0; j < len; i++, j += 4) 
	{
		output[j] = (BYTE)(input[i] & 0xff);
		output[j+1] = (BYTE)((input[i] >> 8) & 0xff);
		output[j+2] = (BYTE)((input[i] >> 16) & 0xff);
		output[j+3] = (BYTE)((input[i] >> 24) & 0xff);
	}
}

//解密
void CMD5::Decode(DWORD *output, BYTE *input, DWORD len)
{
	DWORD i, j;

	for (i=0,j=0; j<len; i++,j+=4)
		output[i] = ((DWORD)input[j]) | (((DWORD)input[j+1]) << 8) |
		(((DWORD)input[j+2]) << 16) | (((DWORD)input[j+3]) << 24);
}

//向缓冲器中保存输入信息
void CMD5::MD5_memcpy(BYTE *output, BYTE *input, DWORD len)
{
	DWORD i;
	for (i=0; i<len; i++)  
		output[i]=input[i];
}

//敏感信息清空
void CMD5::MD5_memset(BYTE *output, int value, DWORD len)
{
	DWORD i;
	for (i=0; i<len; i++)
	((char *)output)[i] = (char)value;
}

//  用MD5算法取散列值
//  参数:	szSour 源字符串
char* CMD5::MD5_Algorithm(CString Soure)
{
	unsigned char szObject[16];
	char output1[33];
    static  char output[33]={"\0"};
	unsigned int iLen = strlen (Soure);
    char szSour[33];
    //给szSour字符串数组赋值	
    for(int i=0;i<iLen;i++)
	{
		szSour[i]=Soure.GetAt(i);
	}
	MD5 context;
	MD5Init(&context);//初始化变量
	MD5Update(&context, (unsigned char*)szSour, iLen);//MD5修正操作
	
	MD5Final(szObject, &context);	//MD5结束输出结果信息
    for ( i = 0; i < 16; i++)
	{
		sprintf(&(output1[2*i]),"%02x",(unsigned char)szObject[i]);
	}
	for(i=0;i<32;i++)
		output[i]=output1[i];
	//AfxMessageBox(output);
	return output;
}

//MD5结束, 输出结果信息
void CMD5::MD5Final(BYTE digest[], MD5 *context)
{
	BYTE bits[8];
	DWORD index, padLen;

	/* 加密bits数 */
	Encode (bits, context->count, 8);

	/*补足长度*/
	index = (DWORD)((context->count[0] >> 3) & 0x3f);
	padLen = (index < 56) ? (56 - index) : (120 - index);
	MD5Update (context, PADDING, padLen);

	/* Append length (before padding) */
	MD5Update (context, bits, 8);

	/*存储摘要信息*/
	Encode (digest, context->state, 16);

	/* 敏感信息清空*/
	MD5_memset ((BYTE *)context, 0, sizeof (*context));
}