Qt exe简单 加密

1,主程序 main 函数
#include <QMessageBox>

#include <Windows.h>

int main(int argc, char *argv[])

{

QApplication a(argc, argv);

//注册

QString fileName = QApplication::applicationFilePath();

QFile file;

file.setFileName(fileName);

if(!file.open(QIODevice::ReadOnly))

return 1;

int fileSize = file.size();

file.seek(fileSize-15);

char lp[15];

int number = file.read(lp,15);//读解密匙

file.close();

DWORD num=atol(lp);

num^=0x1999aa98;

num^=0x12345678;//解密演算,还原为c盘序列号

QString lpRootPathName = "C:\\";

DWORD VolumeSerialNumber;

GetVolumeInformation((LPTSTR)lpRootPathName.utf16(),NULL,12,&VolumeSerialNumber,NULL,NULL,NULL,15);

if(num!=VolumeSerialNumber)

{

QMessageBox::information(NULL,QStringLiteral("注册"),QStringLiteral("软件未注册，请先注册！"));

return 1;

}

Widget w;

w.show();

return a.exec();

}

2,客户端，获取 磁盘序列号 经过运算后，提供给 服务端
#include "widget.h"

#include "ui_widget.h"

#include <Windows.h>

#include <QMessageBox>

#include <QFile>

Widget::Widget(QWidget *parent) :

QWidget(parent),

ui(new Ui::Widget)

{

ui->setupUi(this);

this->setWindowTitle(QStringLiteral("注册Client"));

//读取序列号

QString lpRootPathName = "C:\\";

DWORD VolumeSerialNumber;

GetVolumeInformation((LPTSTR)lpRootPathName.utf16(),NULL,12,&VolumeSerialNumber,NULL,NULL,NULL,15);

VolumeSerialNumber^=0x12345678;

ui->serialNumber->setText(QString::number(VolumeSerialNumber));

ui->registrationCode->setFocus();

}

Widget::~Widget()

{

delete ui;

}

void Widget::on_registerBtn_clicked()

{

long num = ui->registrationCode->text().toLong();//序列号

num^=0x1999aa98;

if(num==ui->serialNumber->text().toLong())

{

QMessageBox::information(this,QStringLiteral("注册"),QStringLiteral("注册成功"));

//写入 exe

QString fileName = QApplication::applicationDirPath()+"/PVAssist.exe";

    QFile file;

    file.setFileName(fileName);

if(!file.open(QIODevice::Append))

return;

    int fileSize = file.size();

file.seek(fileSize);

    char lp[15];

memcpy(lp,ui->registrationCode->text().toStdString().c_str(),15);

file.write(lp,15);

    file.close();

}

else

QMessageBox::information(this,QStringLiteral("注册"),QStringLiteral("注册失败"));

}

3,服务端 ，根据 客户端的序列号 生成 注册码，授权给客户端。
void Widget::on_genrateRegistrationCode_clicked()

{

long num = ui->serialNumber->text().toLong();

num^=0x1999aa98;

ui->registerCode->setText(QString::number(num));

}