C++ md5类，封装好

来源：互联网发布：多目标优化模型编辑：程序博客网时间：2024/06/06 02:28

在网上看到很多md5类，不过封好的很少，我就在网上看到一篇把他写的封装

头文件

#ifndef _MD5_H#define _MD5_H#pragma warning(disable:4786)//来逗下#include <string>#include <string.h>using namespace std;struct MD5_DATA{ unsigned long data[4]; bool operator < (const MD5_DATA& p) const {  return memcmp(data,p.data,4*sizeof(long))>0; }};class CMD5{private: #define uint8  unsigned char #define uint32 unsigned long int struct md5_context {  uint32 total[2];  uint32 state[4];  uint8 buffer[64]; }; void md5_starts( struct md5_context *ctx ); void md5_process( struct md5_context *ctx, uint8 data[64] ); void md5_update( struct md5_context *ctx, uint8 *input, size_t length ); void md5_finish( struct md5_context *ctx, uint8 digest[16] );public: //! construct a CMD5 from any buffer void GenerateMD5(unsigned char* buffer,size_t bufferlen); //! to str md5 string md5(string str); //! construct a CMD5 CMD5(); //! construct a md5src from char * CMD5(const char * md5src); //! construct a CMD5 from a 16 bytes md5 CMD5(unsigned long* md5src); //! add a other md5 CMD5 operator +(CMD5 adder); //! just if equal bool operator ==(CMD5 cmper); //! give the value from equer // void operator =(CMD5 equer); //! to a string string ToString(); unsigned long m_data[4];};#endif /* md5.h */

实现

#include "md5.h"#include <stdio.h>#include <stdlib.h>#include <string.h>#define GET_UINT32(n,b,i)  (n) = (uint32) ((uint8 *) b)[(i)] | (((uint32) ((uint8 *) b)[(i)+1]) <<  8) | (((uint32) ((uint8 *) b)[(i)+2]) << 16) | (((uint32) ((uint8 *) b)[(i)+3]) << 24);#define PUT_UINT32(n,b,i) (((uint8 *) b)[(i)]  ) = (uint8) (((n)) & 0xFF); (((uint8 *) b)[(i)+1]) = (uint8) (((n) >>  8) & 0xFF);  (((uint8 *) b)[(i)+2]) = (uint8) (((n) >> 16) & 0xFF);  (((uint8 *) b)[(i)+3]) = (uint8) (((n) >> 24) & 0xFF);void CMD5::md5_starts( struct md5_context *ctx ){    ctx->total[0] = 0;    ctx->total[1] = 0;    ctx->state[0] = 0x67452301;    ctx->state[1] = 0xEFCDAB89;    ctx->state[2] = 0x98BADCFE;    ctx->state[3] = 0x10325476;}void CMD5::md5_process( struct md5_context *ctx, uint8 data[64] ){    uint32 A, B, C, D, X[16];    GET_UINT32( X[0],  data,  0 );    GET_UINT32( X[1],  data,  4 );    GET_UINT32( X[2],  data,  8 );    GET_UINT32( X[3],  data, 12 );    GET_UINT32( X[4],  data, 16 );    GET_UINT32( X[5],  data, 20 );    GET_UINT32( X[6],  data, 24 );    GET_UINT32( X[7],  data, 28 );    GET_UINT32( X[8],  data, 32 );    GET_UINT32( X[9],  data, 36 );    GET_UINT32( X[10], data, 40 );    GET_UINT32( X[11], data, 44 );    GET_UINT32( X[12], data, 48 );    GET_UINT32( X[13], data, 52 );    GET_UINT32( X[14], data, 56 );    GET_UINT32( X[15], data, 60 );#define S(x,n) ((x << n) | ((x & 0xFFFFFFFF) >> (32 - n)))#define P(a,b,c,d,k,s,t) a += F(b,c,d) + X[k] + t; a = S(a,s) + b;    A = ctx->state[0];    B = ctx->state[1];    C = ctx->state[2];    D = ctx->state[3];#define F(x,y,z) (z ^ (x & (y ^ z)))    P( A, B, C, D,  0,  7, 0xD76AA478 );    P( D, A, B, C,  1, 12, 0xE8C7B756 );    P( C, D, A, B,  2, 17, 0x242070DB );    P( B, C, D, A,  3, 22, 0xC1BDCEEE );    P( A, B, C, D,  4,  7, 0xF57C0FAF );    P( D, A, B, C,  5, 12, 0x4787C62A );    P( C, D, A, B,  6, 17, 0xA8304613 );    P( B, C, D, A,  7, 22, 0xFD469501 );    P( A, B, C, D,  8,  7, 0x698098D8 );    P( D, A, B, C,  9, 12, 0x8B44F7AF );    P( C, D, A, B, 10, 17, 0xFFFF5BB1 );    P( B, C, D, A, 11, 22, 0x895CD7BE );    P( A, B, C, D, 12,  7, 0x6B901122 );    P( D, A, B, C, 13, 12, 0xFD987193 );    P( C, D, A, B, 14, 17, 0xA679438E );    P( B, C, D, A, 15, 22, 0x49B40821 );#undef F#define F(x,y,z) (y ^ (z & (x ^ y)))    P( A, B, C, D,  1,  5, 0xF61E2562 );    P( D, A, B, C,  6,  9, 0xC040B340 );    P( C, D, A, B, 11, 14, 0x265E5A51 );    P( B, C, D, A,  0, 20, 0xE9B6C7AA );    P( A, B, C, D,  5,  5, 0xD62F105D );    P( D, A, B, C, 10,  9, 0x02441453 );    P( C, D, A, B, 15, 14, 0xD8A1E681 );    P( B, C, D, A,  4, 20, 0xE7D3FBC8 );    P( A, B, C, D,  9,  5, 0x21E1CDE6 );    P( D, A, B, C, 14,  9, 0xC33707D6 );    P( C, D, A, B,  3, 14, 0xF4D50D87 );    P( B, C, D, A,  8, 20, 0x455A14ED );    P( A, B, C, D, 13,  5, 0xA9E3E905 );    P( D, A, B, C,  2,  9, 0xFCEFA3F8 );    P( C, D, A, B,  7, 14, 0x676F02D9 );    P( B, C, D, A, 12, 20, 0x8D2A4C8A );#undef F#define F(x,y,z) (x ^ y ^ z)    P( A, B, C, D,  5,  4, 0xFFFA3942 );    P( D, A, B, C,  8, 11, 0x8771F681 );    P( C, D, A, B, 11, 16, 0x6D9D6122 );    P( B, C, D, A, 14, 23, 0xFDE5380C );    P( A, B, C, D,  1,  4, 0xA4BEEA44 );    P( D, A, B, C,  4, 11, 0x4BDECFA9 );    P( C, D, A, B,  7, 16, 0xF6BB4B60 );    P( B, C, D, A, 10, 23, 0xBEBFBC70 );    P( A, B, C, D, 13,  4, 0x289B7EC6 );    P( D, A, B, C,  0, 11, 0xEAA127FA );    P( C, D, A, B,  3, 16, 0xD4EF3085 );    P( B, C, D, A,  6, 23, 0x04881D05 );    P( A, B, C, D,  9,  4, 0xD9D4D039 );    P( D, A, B, C, 12, 11, 0xE6DB99E5 );    P( C, D, A, B, 15, 16, 0x1FA27CF8 );    P( B, C, D, A,  2, 23, 0xC4AC5665 );#undef F#define F(x,y,z) (y ^ (x | ~z))    P( A, B, C, D,  0,  6, 0xF4292244 );    P( D, A, B, C,  7, 10, 0x432AFF97 );    P( C, D, A, B, 14, 15, 0xAB9423A7 );    P( B, C, D, A,  5, 21, 0xFC93A039 );    P( A, B, C, D, 12,  6, 0x655B59C3 );    P( D, A, B, C,  3, 10, 0x8F0CCC92 );    P( C, D, A, B, 10, 15, 0xFFEFF47D );    P( B, C, D, A,  1, 21, 0x85845DD1 );    P( A, B, C, D,  8,  6, 0x6FA87E4F );    P( D, A, B, C, 15, 10, 0xFE2CE6E0 );    P( C, D, A, B,  6, 15, 0xA3014314 );    P( B, C, D, A, 13, 21, 0x4E0811A1 );    P( A, B, C, D,  4,  6, 0xF7537E82 );    P( D, A, B, C, 11, 10, 0xBD3AF235 );    P( C, D, A, B,  2, 15, 0x2AD7D2BB );    P( B, C, D, A,  9, 21, 0xEB86D391 );#undef F    ctx->state[0] += A;    ctx->state[1] += B;    ctx->state[2] += C;    ctx->state[3] += D;}void CMD5::md5_update( struct md5_context *ctx, uint8 *input, size_t length ){    uint32 left, fill;    if( ! length ) return;    left = ( ctx->total[0] >> 3 ) & 0x3F;    fill = 64 - left;    ctx->total[0] += length <<  3;    ctx->total[1] += length >> 29;    ctx->total[0] &= 0xFFFFFFFF;    ctx->total[1] += ctx->total[0] < length << 3;    if( left && length >= fill )    {        memcpy( (void *) (ctx->buffer + left), (void *) input, fill );        md5_process( ctx, ctx->buffer );        length -= fill;        input  += fill;        left = 0;    }    while( length >= 64 )    {        md5_process( ctx, input );        length -= 64;        input  += 64;    }    if( length )    {        memcpy( (void *) (ctx->buffer + left), (void *) input, length );    }}static uint8 md5_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};void CMD5::md5_finish( struct md5_context *ctx, uint8 digest[16] ){    uint32 last, padn;    uint8 msglen[8];    PUT_UINT32( ctx->total[0], msglen, 0 );    PUT_UINT32( ctx->total[1], msglen, 4 );    last = ( ctx->total[0] >> 3 ) & 0x3F;    padn = ( last < 56 ) ? ( 56 - last ) : ( 120 - last );    md5_update( ctx, md5_padding, padn );    md5_update( ctx, msglen, 8 );    PUT_UINT32( ctx->state[0], digest,  0 );    PUT_UINT32( ctx->state[1], digest,  4 );    PUT_UINT32( ctx->state[2], digest,  8 );    PUT_UINT32( ctx->state[3], digest, 12 );}void CMD5::GenerateMD5(unsigned char* buffer,size_t bufferlen){ struct md5_context context; md5_starts (&context); md5_update (&context, buffer, bufferlen); md5_finish (&context,(unsigned char*)m_data);}string CMD5::md5(string str){    unsigned char *p=(unsigned char *)str.data();    GenerateMD5(p,str.length());    return ToString();}CMD5::CMD5(){ for(int i=0;i<4;i++)  m_data[i]=0;}CMD5::CMD5(unsigned long* md5src){ memcpy(m_data,md5src,16);}int _httoi(const char *value){  struct CHexMap  {    char chr;    int value;  };  const int HexMapL = 16;  CHexMap HexMap[HexMapL] =  {    {'0', 0}, {'1', 1},    {'2', 2}, {'3', 3},    {'4', 4}, {'5', 5},    {'6', 6}, {'7', 7},    {'8', 8}, {'9', 9},    {'a', 10}, {'b', 11},    {'c', 12}, {'d', 13},    {'e', 14}, {'f', 15}  };  char *mstr = strdup(value);  char *s = mstr;  int result = 0;  if (*s == '0' && *(s + 1) == 'X') s += 2;  bool firsttime = true;  while (*s != '/0')  {    bool found = false;    for (int i = 0; i < HexMapL; i++)    {      if (*s == HexMap[i].chr)      {        if (!firsttime) result <<= 4;        result |= HexMap[i].value;        found = true;        break;      }    }    if (!found) break;    s++;    firsttime = false;  }  free(mstr);  return result;}CMD5::CMD5(const char* md5src){ if (strcmp(md5src,"")==0) {  for(int i=0;i<4;i++)   m_data[i]=0;  return; } for(int j = 0; j < 16; j++ )    {  char buf[10];  strncpy(buf,md5src,2);  md5src+=2;        ((unsigned char*)m_data)[j] = _httoi(buf);    }}CMD5 CMD5::operator +(CMD5 adder){ unsigned long m_newdata[4]; for(int i=0;i<4;i++)  m_newdata[i]=m_data[i]^(adder.m_data[i]); return CMD5(m_newdata);}bool CMD5::operator ==(CMD5 cmper){ return (memcmp(cmper.m_data ,m_data,16)==0);}//void CMD5::operator =(CMD5 equer)//{// memcpy(m_data,equer.m_data ,16);//}string CMD5::ToString(){    char output[33];    for(int j = 0; j < 16; j++ )    {        sprintf( output + j * 2, "%02x", ((unsigned char*)m_data)[j]);    }    return string(output);}

使用

#include <iostream>#include "md5.h"using namespace std;int main(){    string str("asd3b1S2Bib2suygf1dfgdfgiaehfofnviehiusvbvisauefviuhsiduf");    char *p=(char *)str.data();    CMD5 md5;    md5.GenerateMD5((unsigned char *)p,str.length());    cout << md5.ToString() << endl;    cout << md5.md5(str) << endl;    return 0;}

我做的就是更改里面.h没有

#include <string.h>

出现memcpy错误
增加 md5(string str)

参考http://blog.csdn.net/lzwxyz/article/details/6443336

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