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//////////////////////////////////////////////////////////////////////// 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_FILEstatic 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; }