Java C++实现相同MD5加密算法的方式

目录

• Java与C++实现相同的MD5加密算法
• 1、Java版
• 2、C++代码
• 3、运行效果
  

Java与C++实现相同的MD5加密算法

1、Java版

package com.lyz.utils.common;
 
import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
/**
 * MD5加密
 * @author liuyazhuang
 */
public class MD5Hash {
 
    public static String md5Java(String message) {
        String digest = null;
        try {
            MessageDigest md = MessageDigest.getInstance("MD5");
            byte[] hash = md.digest(message.getBytes("UTF-8"));
 
            //converting byte array to Hexadecimal String
            StringBuilder sb = new StringBuilder(2 * hash.length);
            for (byte b : hash) {
                sb.append(String.format("%02x", b & 0xff));
            }
 
            digest = sb.toString();
 
        } catch (UnsupportedEncodingException ex) {
            //Logger.getLogger(StringReplace.class.getName()).log(Level.SEVERE, null, ex);
        } catch (NoSuchAlgorithmException ex) {
            //Logger.getLogger(StringReplace.class.getName()).log(Level.SEVERE, null, ex);
        }
        return digest;
    }
    public static void main(String[] args) {
  System.out.println(md5Java("admin").toUpperCase());
 }
}

2、C++代码

(1)md5.h
#include     
#include   
#include     
#include     
void   MD5Digest(char   *pszInput,   unsigned   long   nInputSize,   char   *pszOutPut);
(2)md5.cpp
#include     
#include   
#include     
#include     
#include   "md5.h"
 
typedef   unsigned   char   *POINTER;  
typedef   unsigned   short   int   UINT2;  
typedef   unsigned   long   int   UINT4;  
 
typedef   struct    
{  
  UINT4   state[4];  
  UINT4   count[2];  
  unsigned   char   buffer[64];  
}   MD5_CTX;  
 
void   MD5Init(MD5_CTX   *);  
void   MD5Update(MD5_CTX   *,   unsigned   char   *,   unsigned   int);  
void   MD5Final(unsigned   char   [16],   MD5_CTX   *);  
 
#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  
 
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   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);   }  
 
 
inline   void   Encode(unsigned   char   *output,   UINT4   *input,   unsigned   int   len)  
{  
  unsigned   int   i,   j;  
 
  for   (i   =   0,   j   =   0;   j   <   len;   i++,   j   +=   4)   {  
    output[j]   =   (unsigned   char)(input[i]   &   0xff);  
    output[j+1]   =   (unsigned   char)((input[i]   >>   8)   &   0xff);  
    output[j+2]   =   (unsigned   char)((input[i]   >>   16)   &   0xff);  
    output[j+3]   =   (unsigned   char)((input[i]   >>   24)   &   0xff);  
  }  
}  
 
inline   void   Decode(UINT4   *output,   unsigned   char   *input,   unsigned   int   len)  
{  
  unsigned   int   i,   j;  
 
  for   (i   =   0,   j   =   0;   j   <   len;   i++,   j   +=   4)  
    output[i]   =   ((UINT4)input[j])   |   (((UINT4)input[j+1])   <<   8)   |  
  (((UINT4)input[j+2])   <<   16)   |   (((UINT4)input[j+3])   <<   24);  
}  
 
inline   void   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;  
  memset   ((POINTER)x,   0,   sizeof   (x));  
  }  
   
inline   void   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;  
}  
 
inline   void   MD5Update(MD5_CTX   *context,   unsigned   char   *input,   unsigned   int   inputLen)  
{  
  unsigned   int   i,   index,   partLen;  
 
  index   =   (unsigned   int)((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)   {  
    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[i]);  
    index   =   0;  
  }  
  else  
    i   =   0;  
 
  memcpy((POINTER)&context->buffer[index],   (POINTER)&input[i],   inputLen-i);  
}  
 
inline   void   MD5Final(unsigned   char   digest[16],   MD5_CTX   *context)  
{  
  unsigned   char   bits[8];  
  unsigned   int   index,   padLen;  
 
  Encode   (bits,   context->count,   8);  
  index   =   (unsigned   int)((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);  
  memset   ((POINTER)context,   0,   sizeof   (*context));  
  }  
 
void   MD5Digest(char   *pszInput,   unsigned   long   nInputSize,   char   *pszOutPut)  
{  
  MD5_CTX   context;  
  unsigned   int   len   =   strlen   (pszInput);  
 
  MD5Init   (&context);  
  MD5Update   (&context,   (unsigned   char   *)pszInput,   len);  
  MD5Final   ((unsigned   char   *)pszOutPut,   &context);  
}  
 
main()  
{ char szDigest[16];  
  char encrypt[200];  
  printf("请输入要计算MD5值的字符串:");
  gets(encrypt);
  printf("\n加密结果:");
  MD5Digest(encrypt,strlen(encrypt),szDigest);  
  int i;
  for (i=0;i<16;i++) printf ("%02X",(unsigned char)szDigest[i]);
  getchar();
 
}

3、运行效果

这里我们都以输入123456为例

(1)java输出结果如下:

(2)C++输出结果如下:

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