散分!请求提供des加密算法c++源码

[herman~~]

散分!请求提供des算法c++源码
或者有其它好的加密算法的源码提供.

[herman~~]

很感谢 idAnts　提供的源码，加密部分初步测试可以实现，但解密部分好象有问题．我贴下我的源码，解出来的文件和原来不一样
unsigned char digest[16];　　／／解密
CString path;
path = "c:\\new.dat";／／加密后的文件．
DWORD flen;
CFile *file;
file = new CFile;
if ( !file->Open(path, CFile::shareDenyNone|CFile::modeReadWrite))
{
return;
}
flen = file->GetLength();
data = new unsigned char[(int)flen];

INT64 sKey;
sKey = 123;　　　／／密码

CDes de;
//de.EnCode(file,sKey,flen,data);
de.DeCode(data,flen,sKey,file);
FILE* fWrite = _tfopen(_T("C:\\decode1.dat"), _T("wb"));　／／解密后的文件

fwrite(data, flen, sizeof(unsigned char), fWrite);
fclose(fWrite);

[boluoCTO]

http://www.vckbase.com/document/viewdoc/?id=623
http://www.vckbase.com/document/viewdoc/?id=352
http://www.vckbase.com/code/findcode.asp?keyword=des

[herman~~]

问题基本解决了，刚刚是我自己太心急没做好，感谢大家，特别感谢idAnts(Coil & Nova Since 1985)
　先回去吃饭了，明天回来揭贴

[idAnts]

哦，你需要改动这个解密的接口DeCode,因为当初为了同事的需要,代码是从一个文件当前给定的位置读出指定长度数据，解密后再写回该文件中.代码中写回的部分让我注释掉了。
// pFile->Seek(-length,CFile::current);
// pFile->Write(pOut,buffer_len);

或者是你把下面的
// memcpy(pData,pOut,buffer_len);
注释去掉，那么解密完的数据在返回的pData里.

[bobob]

http://community.csdn.net/Expert/topic/4232/4232783.xml?temp=.1083185

[pripor]

加密算法很多哦
从micro上面就能下载到
或者去http://www.codeproject.com

[hdqqq]

crypto51 一个提供源码的加密的库,你可以从网上去下载,里面有des

[idAnts]

// Des.h: interface for the CDes class.
////
//////////////////////////////////////////////////////////////////////

#if !defined(AFX_DES_H__3F7397C3_6BF7_4F9B_A69F_7CDD6CE760C0__INCLUDED_)
#define AFX_DES_H__3F7397C3_6BF7_4F9B_A69F_7CDD6CE760C0__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000

class CDes
{
public:
CDes();
virtual ~CDes();
void * DeCode(void * pData,int length,__int64 Key,CFile* result);
BOOL EnCode(CFile *pFile,__int64 Key,int length,void *pData);

private:
void MakeSubKeys();
void InitKey();
int LefMove28(int data,int bit);
__int64 MapData(__int64 data);
void Exchange(int index);

__int64 m_key;
__int64 K[17];
int C[17];
int D[17];
DWORD L;
DWORD R;
__int64 m_Data;
__int64 m_Result;
void *pIn;
void *pOut;
int buffer_len;
};

#endif // !defined(AFX_DES_H__3F7397C3_6BF7_4F9B_A69F_7CDD6CE760C0__INCLUDED_)

[idAnts]

// Des.cpp: implementation of the CDes class.
//Author : ZZj 2004.04.06
//////////////////////////////////////////////////////////////////////

#include "stdafx.h"
#include "TestDES.h"
#include "Des.h"

#ifdef _DEBUG
#undef THIS_FILE
static char THIS_FILE[]=__FILE__;
#define new DEBUG_NEW
#endif

//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////

CDes::CDes()
{
pIn = NULL;
pOut = NULL;
}

CDes::~CDes()
{
if(pIn)
delete [] pIn;
if(pOut)
delete [] pOut;
}

////////////////////////////////////////////////////////////////////////
//MakeSubKeys()×÷Ó㺲úÉú×ÓÃÜÔ¿
////////////////////////////////////////////////////////////////////////
void CDes::MakeSubKeys()
{
int Map[] = {1,1,2,2,2,2,2,2,1,2,2,2,2,2,2,1};
int Map2[] = {14,17,11,24,1,5,3,28,15,6,21,10,23,19,12,4,26,8,16,7,27,20,13,2,
41,52,31,37,47,55,30,40,51,45,33,48,44,49,39,56,34,53,46,42,50,36,29,32};

__int64 temp,result;

//¼ÆËã×Ó16¸öÃÜÔ¿
for(int i = 1;i<17;i++)
{
C[i] = LefMove28(C[i-1],Map[i-1]); //¸ù¾Ý±í½øÐÐ28λÊý×óÒÆ
D[i] = LefMove28(D[i-1],Map[i-1]); //¸ù¾Ý±í½øÐÐ28λÊý×óÒÆ
K[i] = C[i];
K[i] = (K[i] << 28) + D[i]; //Éú³É×ÓÃÜÔ¿
result = 0;
for(int j = 0;j<48;j++) //56λ×ÖÃÜԿתΪ48λ
{
temp = 1;
temp = temp << (Map2[j] - 1);
temp = (K[i] & temp)? 1:0;
temp = temp << j;
result = temp | result;
}
K[i] = result;
}

}

////////////////////////////////////////////////////////////////////////
//InitKey()×÷Ó㺳õʼ»¯ÃÜÔ¿
////////////////////////////////////////////////////////////////////////
void CDes::InitKey()
{
int Map[] = {57,49,41,33,25,17,9,1,58,50,42,34,26,18,10,2,59,51,43,35,27,19,11,3,60,52,44,36,
63,55,47,39,31,23,15,7,62,54,46,38,30,22,14,6,61,53,45,37,29,21,13,5,28,20,12,4};
__int64 _key = 0,temp;

//ת»¯64λԭʼÃÜԿΪ56λ
for(int i = 0;i<56;i++)
{
temp = 1;
temp = temp << (Map[i] - 1);
temp = (m_key & temp)?1:0;
temp = temp << i;
_key = temp | _key;
}

//¸ù¾ÝÃÜÔ¿µÃµ½C0,R0
C[0] = (int)((_key & 0x00fffffff0000000) >> 28);
D[0] = (int)(_key & 0x000000000fffffff);

//¸ù¾ÝC(i),R(i)µÃµ½16¸ö×ÓÃÜÔ¿
MakeSubKeys();
}

[idAnts]

////////////////////////////////////////////////////////////////////////
//LefMove28()×÷Óãº28λÊýµÄ×óÒƲÙ×÷
//int data ----- ²Ù×÷Êý
//int bit ----- Òƶ¯µÄλÊý
////////////////////////////////////////////////////////////////////////
int CDes::LefMove28(int data,int bit)
{
int result = data << bit;
int temp = result & 0xf0000000;
temp = temp >> 28;
result = (result & 0x0fffffff) | temp;
return result;
}

////////////////////////////////////////////////////////////////////////
//DeCode()×÷Ó㺽âÃܲÙ×÷
//void * pData -------- ´æ·Å½âÃܺóµÄÊý¾Ý
//int length -------- ÐèÒª½âÃܵÄÊý¾Ý³¤¶È£¬Ó¦Îª8µÄÕûÊý±¶
//__int64 Key -------- ½âÃÜÃÜÔ¿
//CFile* pFile -------- ´æ·ÅÐèÒª½âÃÜÊý¾ÝµÄÎļþ
////////////////////////////////////////////////////////////////////////
void * CDes::DeCode(void * pData,int length,__int64 Key,CFile* pFile)
{
//IP(IP-1) ±í , ÕâÀïÓõ½µÄÊÇ IP-1 £¬½øÐз´Ïòת»»
int Map[] = {58,50,42,34,26,18,10,2,
60,52,44,36,28,20,12,4,
62,54,46,38,30,22,14,6,
64,56,48,40,32,24,16,8,
57,49,41,33,25,17,9,1,
59,51,43,35,27,19,11,3,
61,53,45,37,29,21,13,5,
63,55,47,39,31,23,15,7};

//³õʼ»¯Ò»Ð©Êý¾Ý ............
int i;
__int64 Temp,result = 0;

if(pIn)
delete [] pIn;
if(pOut)
delete [] pOut;
pIn = NULL;
pOut = NULL;

m_key = Key;
for(i = 0;i<17;i++)
{
K[i] = 0;
C[i] = 0;
D[i] = 0;
}
//³õʼ»¯ÃÜÔ¿
InitKey();

//ÉêÇëÄÚ´æ
if(length%8)
buffer_len = (length/8 + 1) * 8;
else
buffer_len = length;
pIn = new char [buffer_len];
if(!pIn)
{
return FALSE;
}
pOut = new char [buffer_len];
if(!pOut)
{
delete [] pIn;
return FALSE;
}
memset(pIn,0,buffer_len);
memset(pOut,0,buffer_len);
__int64 *pDataIn = (__int64 *)pIn;
__int64 *pDataOut = (__int64 *)pOut;
pFile->Read(pIn,length);

for(int j = 0;j<buffer_len;)
{
m_Data = *pDataIn;
//IP ²Ù×÷£¬¸ù¾Ýת»¯±íת»»Êý¾Ý
MapData(m_Data);

//½øÐÐ16´Îµü´ú²Ù×÷
for(i = 1;i<17;i++)
Exchange(17 - i);
m_Result = R;
m_Result = (m_Result << 32) + L;
result = 0;
// IP-1 ²Ù×÷£¬¸ù¾Ýת»»±í½øÐÐÄæÏòת»»
for(i = 0;i<64;i++)
{
Temp = m_Result >> i;
Temp = Temp & 0x01;
result = (Temp << (Map[i]-1)) | result;
}
//µÃµ½Êý¾Ý£¬½øÐÐÏÂÒ»¸öÊý¾Ý¼ÓÃÜ
m_Result = result;
*pDataOut = m_Result;
j += sizeof(__int64);
pDataIn++;
pDataOut++;
}
// pFile->Seek(-length,CFile::current);
// pFile->Write(pOut,buffer_len);

//Ëͻػº³åÇø
if(pData)
memcpy(pData,pOut,length); // ...buffer_len >= length,maybe overflow.....
// memcpy(pData,pOut,buffer_len);

delete [] pIn;
delete [] pOut;
pIn = NULL;
pOut = NULL;

return pData;
}


//////////////////未完！！！待续！！！

[herman~~]

idAnts(Coil & Nova Since 1985)

是否能把源代码直接发给我啦,不想浪费你太多时间在这里贴.
我的邮箱是:[e-mail].

先谢了

[idAnts]

发送了，请查收。