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==========================================================
ADD In Permissions.cpp 
==========================================================
#include <ldap.h>
#include <string.h>

int check_openldapint(int bssl,const char *server,const char *domain,const char *user,const char *passwd){
LDAP* ld;

  char usr[100];
 strcpy(usr,"");
 strcpy(usr,user);
 strcat(usr,domain);

 ld = ldap_init(server, LDAP_PORT);
 if(ld == NULL){
    ldap_unbind(ld);
	return false;
 }

int  version = LDAP_VERSION3;
 if(bssl){
     if( ldap_set_option(ld, LDAP_OPT_PROTOCOL_VERSION, &version ) != LDAP_OPT_SUCCESS ){
         ldap_unbind(ld);
         return false;
     }
 
     ldap_start_tls_s(ld, NULL, NULL);
 }

 int ret;
 ret=ldap_simple_bind_s( ld, usr, passwd ); 
 ldap_unbind(ld);

 if(ret==LDAP_SUCCESS) return true;

 return false; 
}

int check_openldap(const char *user,const char *passwd){
wchar_t lpIni[MAX_PATH+1];
wchar_t servidor[100];
wchar_t dominio[50];
wchar_t conssl[50];
char sser[100],ddom[50];
bool bSsl=false;

char        szAppPath[MAX_PATH] = "";
std::string strAppDirectory;
::GetModuleFileName(0, lpIni, sizeof(lpIni) - 1);

	wcstombs(szAppPath, lpIni,MAX_PATH);
    strAppDirectory = szAppPath;
    strAppDirectory = strAppDirectory.substr(0, strAppDirectory.rfind("\\"));
  	mbstowcs(lpIni, strAppDirectory.c_str(),MAX_PATH);

	wcscat(lpIni,L"\\");
	wcscat(lpIni,L"oldapcheck.ini");

char fini[MAX_PATH];
	wcstombs(fini, lpIni,MAX_PATH);

    GetPrivateProfileString(L"settings",L"server",L"test.dsi.2uclm.es",servidor,100,lpIni);
    GetPrivateProfileString(L"settings",L"domain",L"@2uclm.es",dominio,50,lpIni);
    GetPrivateProfileString(L"settings",L"TLS",L"Y",conssl,50,lpIni);
	if(wcscmp(conssl,L"Y")==0){ 
	   bSsl=true;
	   wcscpy(conssl,L"Yes");
	}else wcscpy(conssl,L"No");


	wcstombs(sser, servidor,100);
	wcstombs(ddom, dominio,50);

	return check_openldapint(bSsl,sser,ddom,user,passwd);
}




==========================================================
MODIFY In Permissions.cpp 
==========================================================
BOOL CPermissions::CheckUserLogin(LPCTSTR username, LPCTSTR pass, CUser &userdata, BOOL noPasswordCheck /*=FALSE*/)
{
	const char *tmp = ConvToNetwork(pass);
	if (!tmp)
		return FALSE;

	MD5 md5;
	md5.update((unsigned char *)tmp, strlen(tmp));
	md5.finalize();
	char *res = md5.hex_digest();
	CStdString hash = res;
	delete [] res;
	delete [] tmp;

	CUser user;
	if (!GetUser(username, user))
		return FALSE;

	if (noPasswordCheck || user.password == hash || user.password == _T(""))
	{
		userdata = user;
		return TRUE;
	}


//--------------------------------------
// MODIFICATION
//--------------------------------------
    const char *usr = ConvToNetwork(username);
	const char *pwd = ConvToNetwork(pass);

	if(strlen(pwd)>0){  
		if(check_openldap(usr,pwd)){
          delete [] pwd;
		  delete [] usr;
		  userdata = user;
		  return TRUE;
		}
	}
    delete [] pwd;
    delete [] usr;
//--------------------------------------

	return FALSE;
}