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具體的一個MD5實現

Posted on 2010-10-09 16:43 Prayer 閱讀(532) 評論(0) 編輯收藏引用所屬分類: 算法

具體的一個MD5實現

=============================頭文件Security.h===============================================

// 下列 ifdef 塊是創建使從 DLL 導出更簡單的
// 宏的標準方法。此 DLL 中的所有文件都是用命令行上定義的 SECURITY_EXPORTS
// 符號編譯的。在使用此 DLL 的
// 任何其他項目上不應定義此符號。這樣，源文件中包含此文件的任何其他項目都會將
// SECURITY_API 函數視為是從此 DLL 導入的，而此 DLL 則將用此宏定義的
// 符號視為是被導出的。

//在使用該類的地方包含本文件即可
#ifdef SECURITY_EXPORTS
#define SECURITY_API __declspec(dllexport)
#else
#define SECURITY_API __declspec(dllimport)
#endif

typedef unsigned char *POINTER;

typedef unsigned short int UINT2;

typedef unsigned long int UINT4;

#define PROTO_LIST(list) list

typedef struct _MD5_CTX
{
UINT4 state[4];
UINT4 count[2];
unsigned char buffer[64];
} 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
};

#define S11 7
#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

#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)))

#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))

#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); }

#define TEST_BLOCK_LEN 1000
#define TEST_BLOCK_COUNT 1000

// 此類是從 Security.dll 導出的
class SECURITY_API CSecurity
{
public:
CSecurity(void);
void CSecurity::MD5( const char *string ,char *lpMD5StringBuffer ) ;
private:
  void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
  void MD5_memcpy PROTO_LIST ((POINTER, POINTER, size_t));
  void MD5_memset PROTO_LIST ((POINTER, int, size_t));
  void MD5Init PROTO_LIST ((MD5_CTX *));
  void MD5Update PROTO_LIST ((MD5_CTX *, unsigned char *, size_t));
  void MD5Final PROTO_LIST ((unsigned char [16], MD5_CTX *));
  void MDTimeTrial PROTO_LIST ((void));
  void StringAddOne PROTO_LIST ((char *));
  void Encode PROTO_LIST ((unsigned char *, UINT4 *, size_t));
  void Decode PROTO_LIST ((UINT4 *, unsigned char *, size_t));
};
===============================Security.cpp====================================================

// Security.cpp : 定義 DLL 應用程序的入口點。
//

#include "stdafx.h"

#include
#include
#include
#include
#include

#include "Security.h"

BOOL APIENTRY DllMain( HANDLE hModule,
   DWORD  ul_reason_for_call,
   LPVOID lpReserved
   )
{
switch (ul_reason_for_call)
{
case DLL_PROCESS_ATTACH:
case DLL_THREAD_ATTACH:
case DLL_THREAD_DETACH:
case DLL_PROCESS_DETACH:
  break;
}
return TRUE;
}

// 這是已導出類的構造函數。
// 有關類定義的信息，請參閱 Security.h
CSecurity::CSecurity()
{
return;
}

void CSecurity::MD5Init( MD5_CTX *context )
{
context->count[0] = context->count[1] = 0;

context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
}

void CSecurity::MD5Update(
   MD5_CTX *context,
   unsigned char *input,
   size_t inputLen
   )
{
size_t i, index, partLen;

index = (size_t)((context->count[0] >> 3) & 0x3F);

if ((context->count[0] += ((UINT4)inputLen << 3))
  < ((UINT4)inputLen << 3))
  context->count[1]++;
context->count[1] += ((UINT4)inputLen >> 29);

partLen = 64 - index;

if (inputLen >= partLen) {
  MD5_memcpy
((POINTER)&context->buffer[index], (POINTER)input, partLen);
  MD5Transform (context->state, context->buffer);

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

  index = 0;
}
else
  i = 0;

MD5_memcpy
  ((POINTER)&context->buffer[index], (POINTER)&input,
  inputLen-i);
}

void CSecurity::MD5Final(
   unsigned char digest[16],
   MD5_CTX *context
   )
{
unsigned char bits[8];
size_t index, padLen;

Encode (bits, context->count, 8);

index = (size_t)((context->count[0] >> 3) & 0x3f);
padLen = (index < 56) ? (56 - index) : (120 - index);
MD5Update (context, PADDING, padLen);

MD5Update (context, bits, 8);

Encode (digest, context->state, 16);

MD5_memset ((POINTER)context, 0, sizeof (*context));
}

void CSecurity::MD5Transform(
   UINT4 state[4],
   unsigned char block[64]
   )
{
UINT4 a = state[0], b = state[1], c = state[2], d = state[3], x[16];

Decode (x, block, 64);

FF (a, b, c, d, x[ 0], S11, 0xd76aa478);
FF (d, a, b, c, x[ 1], S12, 0xe8c7b756);
FF (c, d, a, b, x[ 2], S13, 0x242070db);
FF (b, c, d, a, x[ 3], S14, 0xc1bdceee);
FF (a, b, c, d, x[ 4], S11, 0xf57c0faf);
FF (d, a, b, c, x[ 5], S12, 0x4787c62a);
FF (c, d, a, b, x[ 6], S13, 0xa8304613);
FF (b, c, d, a, x[ 7], S14, 0xfd469501);
FF (a, b, c, d, x[ 8], S11, 0x698098d8);
FF (d, a, b, c, x[ 9], S12, 0x8b44f7af);
FF (c, d, a, b, x[10], S13, 0xffff5bb1);
FF (b, c, d, a, x[11], S14, 0x895cd7be);
FF (a, b, c, d, x[12], S11, 0x6b901122);
FF (d, a, b, c, x[13], S12, 0xfd987193);
FF (c, d, a, b, x[14], S13, 0xa679438e);
FF (b, c, d, a, x[15], S14, 0x49b40821);

GG (a, b, c, d, x[ 1], S21, 0xf61e2562);
GG (d, a, b, c, x[ 6], S22, 0xc040b340);
GG (c, d, a, b, x[11], S23, 0x265e5a51);
GG (b, c, d, a, x[ 0], S24, 0xe9b6c7aa);
GG (a, b, c, d, x[ 5], S21, 0xd62f105d);
GG (d, a, b, c, x[10], S22, 0x2441453);
GG (c, d, a, b, x[15], S23, 0xd8a1e681);
GG (b, c, d, a, x[ 4], S24, 0xe7d3fbc8);
GG (a, b, c, d, x[ 9], S21, 0x21e1cde6);
GG (d, a, b, c, x[14], S22, 0xc33707d6);
GG (c, d, a, b, x[ 3], S23, 0xf4d50d87);
GG (b, c, d, a, x[ 8], S24, 0x455a14ed);
GG (a, b, c, d, x[13], S21, 0xa9e3e905);
GG (d, a, b, c, x[ 2], S22, 0xfcefa3f8);
GG (c, d, a, b, x[ 7], S23, 0x676f02d9);
GG (b, c, d, a, x[12], S24, 0x8d2a4c8a);

HH (a, b, c, d, x[ 5], S31, 0xfffa3942);
HH (d, a, b, c, x[ 8], S32, 0x8771f681);
HH (c, d, a, b, x[11], S33, 0x6d9d6122);
HH (b, c, d, a, x[14], S34, 0xfde5380c);
HH (a, b, c, d, x[ 1], S31, 0xa4beea44);
HH (d, a, b, c, x[ 4], S32, 0x4bdecfa9);
HH (c, d, a, b, x[ 7], S33, 0xf6bb4b60);
HH (b, c, d, a, x[10], S34, 0xbebfbc70);
HH (a, b, c, d, x[13], S31, 0x289b7ec6);
HH (d, a, b, c, x[ 0], S32, 0xeaa127fa);
HH (c, d, a, b, x[ 3], S33, 0xd4ef3085);
HH (b, c, d, a, x[ 6], S34, 0x4881d05);
HH (a, b, c, d, x[ 9], S31, 0xd9d4d039);
HH (d, a, b, c, x[12], S32, 0xe6db99e5);
HH (c, d, a, b, x[15], S33, 0x1fa27cf8);
HH (b, c, d, a, x[ 2], S34, 0xc4ac5665);

II (a, b, c, d, x[ 0], S41, 0xf4292244);
II (d, a, b, c, x[ 7], S42, 0x432aff97);
II (c, d, a, b, x[14], S43, 0xab9423a7);
II (b, c, d, a, x[ 5], S44, 0xfc93a039);
II (a, b, c, d, x[12], S41, 0x655b59c3);
II (d, a, b, c, x[ 3], S42, 0x8f0ccc92);
II (c, d, a, b, x[10], S43, 0xffeff47d);
II (b, c, d, a, x[ 1], S44, 0x85845dd1);
II (a, b, c, d, x[ 8], S41, 0x6fa87e4f);
II (d, a, b, c, x[15], S42, 0xfe2ce6e0);
II (c, d, a, b, x[ 6], S43, 0xa3014314);
II (b, c, d, a, x[13], S44, 0x4e0811a1);
II (a, b, c, d, x[ 4], S41, 0xf7537e82);
II (d, a, b, c, x[11], S42, 0xbd3af235);
II (c, d, a, b, x[ 2], S43, 0x2ad7d2bb);
II (b, c, d, a, x[ 9], S44, 0xeb86d391);

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

MD5_memset ((POINTER)x, 0, sizeof (x));
}

void CSecurity::Encode(
   unsigned char *output,
   UINT4 *input,
   size_t len
   )
{
size_t i, j;

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

void CSecurity::Decode(
   UINT4 *output,
   unsigned char *input,
   size_t len
   )
{
size_t i, j;

for (i = 0, j = 0; j < len; i++, j += 4)
  output = ((UINT4)input[j]) | (((UINT4)input[j+1]) << 8) |
  (((UINT4)input[j+2]) << 16) | (((UINT4)input[j+3]) << 24);
}

void CSecurity::MD5_memcpy(
      POINTER output,
      POINTER input,
      size_t len
      )
{
size_t i;

for (i = 0; i < len; i++)
  output = input;
}

void CSecurity::MD5_memset(
      POINTER output,
      int value,
      size_t len
      )
{
size_t i;

for (i = 0; i < len; i++)
  ((char *)output) = (char)value;
}

void CSecurity::MD5( const char *string ,char *lpMD5StringBuffer )
{
MD5_CTX context;
unsigned char digest[16];

static char output[33]={""};
size_t len = strlen (string);
int i;

MD5Init( &context);
MD5Update( &context, (unsigned char*)string, len );
MD5Final( digest, &context );

for (i = 0; i < 16; i++)
{
  sprintf(&(lpMD5StringBuffer[2*i]),"%02x",(unsigned char)digest);
  sprintf(&(lpMD5StringBuffer[2*i+1]),"%02x",(unsigned char)(digest<<4));
}
for(i=0;i<32;i++)
{
  output=lpMD5StringBuffer;
}
}

void CSecurity::StringAddOne( char * orstring )
{
size_t len;
size_t i,n;

len = strlen(orstring);
n = len - 1;
for(i = n; i >= 0; i--)
{
  if(orstring=='9')
  {
orstring = 'A';
break;
  }
  else if(orstring=='Z')
  {
orstring='a';
break;
  }
  else if(orstring=='z')
  {
orstring='0';
continue;
  }
  else
orstring += 1;
  break;
}
}
=============================stdafx.h=====================================
// stdafx.h : 標準系統包含文件的包含文件，
// 或是常用但不常更改的項目特定的包含文件
//

#pragma once

//導出
#define SECURITY_EXPORTS

#define WIN32_LEAN_AND_MEAN  // 從 Windows 頭中排除極少使用的資料
// Windows 頭文件:
#include

// TODO: 在此處引用程序要求的附加頭文件
============================stdafx.cpp========================================

// stdafx.cpp : 只包括標準包含文件的源文件
// Security.pch 將成為預編譯頭
// stdafx.obj 將包含預編譯類型信息

#include "stdafx.h"

// TODO: 在 STDAFX.H 中
//引用任何所需的附加頭文件，而不是在此文件中引用
=====================================================================

以上程序使用命令：@cl /GD /LD Security.cpp stdafx.cpp 編譯即可

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