C++ md5类，封装好
2024-09-05 19:13:40
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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