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md5加密算法 Java与C++实现相同的MD5加密算法简单实例

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想了解Java与C++实现相同的MD5加密算法简单实例的相关内容吗,在本文为您仔细讲解md5加密算法的相关知识和一些Code实例,欢迎阅读和指正,我们先划重点:md5加密算法,下面大家一起来学习吧。

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  <stdio.h> 
#include  <stdlib.h>
#include  <time.h> 
#include  <string.h> 
void  MD5Digest(char  *pszInput,  unsigned  long  nInputSize,  char  *pszOutPut);

(2)md5.cpp

#include  <stdio.h> 
#include  <stdlib.h>
#include  <time.h> 
#include  <string.h> 
#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:

以上就是小编为大家带来的Java与C++实现相同的MD5加密算法简单实例的全部内容了,希望对大家有所帮助,多多支持~

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