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Java和C++怎么实现相同的MD5加密算法

发表于：2026-11-02 作者：千家信息网编辑

千家信息网最后更新 2026年11月02日，这篇文章主要讲解了"Java和C++怎么实现相同的MD5加密算法"，文中的讲解内容简单清晰，易于学习与理解，下面请大家跟着小编的思路慢慢深入，一起来研究和学习"Java和C++怎么实现相同的MD5加密

千家信息网最后更新 2026年11月02日Java和C++怎么实现相同的MD5加密算法

这篇文章主要讲解了"Java和C++怎么实现相同的MD5加密算法"，文中的讲解内容简单清晰，易于学习与理解，下面请大家跟着小编的思路慢慢深入，一起来研究和学习"Java和C++怎么实现相同的MD5加密算法"吧！

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("x", 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 ("X",(unsigned char)szDigest[i]);  getchar(); }