unit1.cpp

DES的加密解密在c++ builder中的使用

//---------------------------------------------------------------------------

#include <vcl.h>
#pragma hdrstop

#include "Unit1.h"
#include "_DES.h"
#include "IniFiles.hpp"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm1 *Form1;
//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
        : TForm(Owner)
{
}
//---------------------------------------------------------------------------
void __fastcall TForm1::Button2Click(TObject *Sender)
{
        char Epw[25];   //加密后的字符
        AnsiString appName = Application->ExeName.SubString(0,Application->ExeName.LastDelimiter(".")) + "ini";//Application->ExeName;
        
        TMemoryStream* pms = new TMemoryStream();//定义流对象.
        TMemIniFile * memIni =  new TMemIniFile(appName);

        memIni->ReadBinaryStream("Database","pw",pms);
        pms->ReadBuffer(Epw,25) ;
        delete pms;

        //解密sqlserver的用户名和密码
        DES des;
        char key[24];       //密钥
        char dentry[25];   //要解密的内容
        des.MakeKey24("密钥" ,key);  //生成密钥
        des.DESKey24(key,1);

        des.D3_24Des(Epw, dentry);
        AnsiString pw = StrPas(dentry);

        ShowMessage(pw);   //这里自己用

        delete memIni ;
}
//---------------------------------------------------------------------------
void __fastcall TForm1::Button1Click(TObject *Sender)
{
        DES des;
        char key[24];
        char entryt[25];
        des.MakeKey24("密钥" ,key);
        des.DESKey24(key,0);

        AnsiString Str = "密码";
        des.D3_24Des(Str.c_str(), entryt);

        TMemoryStream* pms = new TMemoryStream();
        pms->Write(entryt,sizeof(entryt));
        pms->Seek(0,0);

        TIniFile *ini;
        ini = new TIniFile( ChangeFileExt( Application->ExeName, ".INI" ) );
        ini->WriteBinaryStream("Database","pw",pms)  ;

        delete ini;
}
//---------------------------------------------------------------------------