MD5和VC ++ [英] MD5 and VC++

问题描述

你好，

VC ++中有一个可以进行MD5加密和解密的库吗?

谢谢，
Garyc

Hello,

Is there a library in VC++ that does MD5 encryption and decryption?

Thanks,
Garyc

推荐答案

有Windows Cryptography [

There is Windows Cryptography [^], for instance.
:)

我有解密示例代码...

这是md5Capi.h代码..... >>>>

//md5Capi.h:Cmd5Capi类的接口.
//
///////////////////////////////////////////////////////////////////////

#if！defined(AFX_MD5CAPI_H__438D2BEF_6F1B_4C5C_830F_0E7B6D1FD7E2__INCLUDED_)
#define AFX_MD5CAPI_H__438D2BEF_6F1B_4C5C_830F_0E7B6D1FD7E2__INCLUDED_

#if _MSC_VER> 1000
#pragma一旦
#endif//_MSC_VER> 1000

#ifndef _WIN32_WINNT
#define _WIN32_WINNT 0x0400
#include< wincrypt.h> //加密API原型和定义
#endif
//加密API原型和定义


Cmd5Capi类
{
公众:
CString& Digest(CString& csBuffer);
CString& GetDigest(void);

Cmd5Capi(CString& csBuffer);
Cmd5Capi();
虚拟〜Cmd5Capi();
CString csDigest;
};




#endif//！defined(AFX_MD5CAPI_H__438D2BEF_6F1B_4C5C_830F_0E7B6D1FD7E2__INCLUDED_)




/////////////////////////////////

和md5Capi.cpp代码>>>>>>>



///////////////////////////////////////////////////////////////////////
//md5Capi.cpp:Cmd5Capi类的实现.
//使用WIN Crypto API计算MD5摘要.
//
///////////////////////////////////////////////////////////////////////

#include"stdafx.h"
#include"md5Capi.h"

#ifdef _DEBUG
#undef THIS_FILE
静态字符THIS_FILE [] = __ FILE__;
#define new DEBUG_NEW
#endif

///////////////////////////////////////////////////////////////////////
//构造/破坏
///////////////////////////////////////////////////////////////////////

Cmd5Capi :: Cmd5Capi()
{
csDigest.Empty();
}

Cmd5Capi :: Cmd5Capi(CString& csBuffer)
{
摘要(csBuffer);
}



Cmd5Capi ::〜Cmd5Capi()
{

}

CString& Cmd5Capi :: GetDigest(void)
{
返回csDigest;

}


CString& Cmd5Capi :: Digest(CString& csBuffer)
{
HCRYPTPROV hCryptProv;
HCRYPTHASH哈希；
字节bHash [0x7f];
DWORD dwHashLen = 16; //MD5算法始终返回16个字节.
DWORD cbContent = csBuffer.GetLength();
BYTE * pbContent =(BYTE *)csBuffer.GetBuffer(cbContent);


if(CryptAcquireContext(& hCryptProv，
NULL，NULL，PROV_RSA_FULL，CRYPT_VERIFYCONTEXT | CRYPT_MACHINE_KEYSET))
{

if(CryptCreateHash(hCryptProv，
CALG_MD5，//算法标识符定义，请参见:wincrypt.h
0，0，& hHash))
{
if(CryptHashData(hHash，pbContent，cbContent，0))
{

if(CryptGetHashParam(hHash，HP_HASHVAL，bHash，& dwHashLen，0))
{
//制作数字摘要值的字符串版本
csDigest.Empty();
CString tmp;
for(int i = 0; i< 16; i ++)
{
tmp.Format(％02x"，bHash [i]);
csDigest + = tmp;
}

}
else csDigest = _T(获取哈希参数出错");

}
else csDigest = _T(错误哈希数据");
}
else csDigest = _T(创建哈希时出错");

}
else csDigest = _T(错误获取上下文");


CryptDestroyHash(hHash);
CryptReleaseContext(hCryptProv，0);
csBuffer.ReleaseBuffer();
返回csDigest;


}

/////////////////////////////////

#include"md5Capi.h"

void EncriptFunction(CString content)
{
Cmd5Capi md5Capi;

CString enc(content);

CString md5coad = md5Capi.Digest(enc);

AfxMessageBox(md5coad);

}

hi i have decryption sample code...

Here is the md5Capi.h code.....>>>>

// md5Capi.h: interface for the Cmd5Capi class.
//
//////////////////////////////////////////////////////////////////////

#if !defined(AFX_MD5CAPI_H__438D2BEF_6F1B_4C5C_830F_0E7B6D1FD7E2__INCLUDED_)
#define AFX_MD5CAPI_H__438D2BEF_6F1B_4C5C_830F_0E7B6D1FD7E2__INCLUDED_

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

#ifndef _WIN32_WINNT
#define _WIN32_WINNT 0x0400
#include <wincrypt.h> // Cryptographic API Prototypes and Definitions
#endif
// Cryptographic API Prototypes and Definitions


class Cmd5Capi
{
public:
CString &Digest(CString & csBuffer);
CString &GetDigest(void);

Cmd5Capi(CString & csBuffer);
Cmd5Capi();
virtual ~Cmd5Capi();
CString csDigest;
};




#endif // !defined(AFX_MD5CAPI_H__438D2BEF_6F1B_4C5C_830F_0E7B6D1FD7E2__INCLUDED_)




////////////////////////////////////////////////

AND md5Capi.cpp CODE>>>>>>>



//////////////////////////////////////////////////////////////////////
// md5Capi.cpp: implementation of the Cmd5Capi class.
// Calcule MD5 Digest using the WIN Crypto API.
//
//////////////////////////////////////////////////////////////////////

#include "stdafx.h"
#include "md5Capi.h"

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

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

Cmd5Capi::Cmd5Capi()
{
csDigest.Empty();
}

Cmd5Capi::Cmd5Capi(CString & csBuffer)
{
Digest(csBuffer);
}



Cmd5Capi::~Cmd5Capi()
{

}

CString &Cmd5Capi::GetDigest(void)
{
return csDigest;

}


CString &Cmd5Capi::Digest(CString & csBuffer)
{
HCRYPTPROV hCryptProv;
HCRYPTHASH hHash;
BYTE bHash[0x7f];
DWORD dwHashLen= 16; // The MD5 algorithm always returns 16 bytes.
DWORD cbContent= csBuffer.GetLength();
BYTE* pbContent= (BYTE*)csBuffer.GetBuffer(cbContent);


if(CryptAcquireContext(&hCryptProv,
NULL, NULL, PROV_RSA_FULL, CRYPT_VERIFYCONTEXT | CRYPT_MACHINE_KEYSET))
{

if(CryptCreateHash(hCryptProv,
CALG_MD5, // algorithm identifier definitions see: wincrypt.h
0, 0, &hHash))
{
if(CryptHashData(hHash, pbContent, cbContent, 0))
{

if(CryptGetHashParam(hHash, HP_HASHVAL, bHash, &dwHashLen, 0))
{
// Make a string version of the numeric digest value
csDigest.Empty();
CString tmp;
for (int i = 0; i<16; i++)
{
tmp.Format("%02x", bHash[i]);
csDigest+=tmp;
}

}
else csDigest=_T("Error getting hash param");

}
else csDigest=_T("Error hashing data");
}
else csDigest=_T("Error creating hash");

}
else csDigest=_T("Error acquiring context");


CryptDestroyHash(hHash);
CryptReleaseContext(hCryptProv, 0);
csBuffer.ReleaseBuffer();
return csDigest;


}

///////////////////////////////////////////////

#include "md5Capi.h"

void EncriptFunction(CString content)
{
Cmd5Capi md5Capi;

CString enc(content);

CString md5coad = md5Capi.Digest(enc);

AfxMessageBox(md5coad);

}

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