?? md5.cpp
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// MD5.cpp: implementation of the CMD5 class.
//
//////////////////////////////////////////////////////////////////////
#include "stdafx.h"
#include "Login.h"
#include "MD5.h"
#ifdef _DEBUG
#undef THIS_FILE
static char THIS_FILE[]=__FILE__;
#define new DEBUG_NEW
#endif
//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////
/* 4個輔助函數 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)))
/* 定義ROTATE_LEFT為x 左移 n bits. */
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
// FF, GG, HH和II分別為第1, 2, 3, 4輪循環的輔助函數.
#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()
{
}
//增加填充數組 增加padding使得數據長度（bit為單位）模512為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循環
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);
/* 第一輪循環 */
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 */
/* 第二輪循環 */
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 */
/* 第三輪循環 */
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 */
/* 第四輪循環 */
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初始化變量
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;
/* 計算 number of bytes mod 64 */
index = (DWORD)((context->count[0] >> 3) & 0x3F);
/* 修正bits數 */
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;
/* 向緩沖器中保存輸入信息*/
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);
}
//向緩沖器中保存輸入信息
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
// 參數: szSour 源字符串
char* CMD5::MD5_Algorithm(CString Soure)
{
unsigned char szObject[16];
char output1[33];
static char output[33]={"\0"};
int iLen = strlen (Soure);
char szSour[33];
//給szSour字符串數組賦值
for(int i=0;i<iLen;i++)
{
szSour[i]=Soure.GetAt(i);
}
MD5 context;
MD5Init(&context);
MD5Update(&context, (unsigned char*)szSour, iLen);
MD5Final(szObject, &context);
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];
return output;
}
//MD5結束, 輸出結果信息
void CMD5::MD5Final(BYTE digest[], MD5 *context)
{
BYTE bits[8];
DWORD index, padLen;
/* 加密bits數 */
Encode (bits, context->count, 8);
/*補足長度*/
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);
/*存儲摘要信息*/
Encode (digest, context->state, 16);
/* 敏感信息清空*/
MD5_memset ((BYTE *)context, 0, sizeof (*context));
}
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