QT设置软件的使用期限

前言

当我们发布商业软件时，为了获取更多的盈利，我们会设置用户使用软件的期限。比如我们给到用户的软件试用期是3个月，过期之后就无法使用了，需要向销售方支付费用，开发者给与授权之后才能继续使用。

对于软件开发者，就博主个人而言，我是非常乐意做这种事情的。博主整理了自己项目中使用的方法，在这里分享一下，也方便自己后期回顾。

功能预览

 

操作流程

1. 获取设备信息（网卡地址、硬盘***、主板***、处理器ID、BIOS***、CPUID等）
2. 选择使用期限
3. 根据设备信息、使用期限、当前日期生成唯一的 key
4. 把key和所需信息写入注册表
5. 运行程序读取注册表检测是否过期，并更新日期

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封装的类 BMACHINECONTROL

#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 

class BMachineControl
{
public:
    BMachineControl();

    QString getWMIHWInfo(int type);

    QString getCPUID1();

    QString getCPUID2();

    QString getHDLogicalID();

    QString getMac();

    QString getCPUManID();

    QString getInfo();

    // 根据设备信息、日期、可使用月份生成key
    QString getKey(QString machineinfo, QString ddMMyyyy, int months);

    // 注册key
    bool activeKey(QString key);

    // 拷贝至文件
    void copyToFile(QSettings* reg, bool magic = false);

    // 无注册表信息则初始化并返回true, 否则直接返回false
    bool initializeReg();

    // 比较是否与文件一致
    bool judgeFile();

    // 判断日期是否被故意修改
    bool judgeDate();

    // 判断key，返回剩余天数，过期则为负
    int judgeKey();

    // 刷新 DT1
    void refreshDT1();

private:
    const QString kReg = "HKEY_CURRENT_USER\\Software\\Lenovo\\App";
    const QString kKey = "K";
    const QString kDateTime0 = "DT0";
    const QString kDateTime1 = "DT1";
    const QString kDateTime2 = "DT2";
    const QString kMonths = "M";

    const int kForever = 1000000;
    const QList kValidity = {1, 3, 6, 12, kForever};

    const QString kFile = "C:/ProgramData/Lenovo/app.dat";
};

获取设备信息

这里用到了 QAxObject 和 QNetworkInterface，记得在pro中导入Qt模块
QT += network axcontainer

QString BMachineControl::getWMIHWInfo(int type)
{
    /*
     * 注意：qt调用wmi时，对查询语句要求很严格，所以like之类的句子务必精确才能有结果出来
     *
     * 1. 当前原生网卡地址
     *    SELECT MACAddress ...
     *
     * 2. 硬盘***
     *    SELECT PNPDeviceID ...
     *
     * 3. 获取主板***
     *    SELECT SerialNumber ...
     *
     * 4. 处理器ID
     *    SELECT ProcessorId ...
     *
     * 5. BIOS***
     *    SELECT SerialNumber ...
     *
     * 6. 主板型号
     *    SELECT Product ...
     */

    QString hwInfo;
    QStringList sqlCmd;
    sqlCmd.clear();
    sqlCmd << "SELECT MACAddress FROM Win32_NetworkAdapter WHERE (MACAddress IS NOT NULL) AND (NOT (PNPDeviceID LIKE 'ROOT%'))";
    sqlCmd << "SELECT PNPDeviceID FROM Win32_DiskDrive WHERE( PNPDeviceID IS NOT NULL) AND (MediaType LIKE 'Fixed%')";
    sqlCmd << "SELECT SerialNumber FROM Win32_BaseBoard WHERE (SerialNumber IS NOT NULL)";
    sqlCmd << "SELECT ProcessorId FROM Win32_Processor WHERE (ProcessorId IS NOT NULL)";
    sqlCmd << "SELECT SerialNumber FROM Win32_BIOS WHERE (SerialNumber IS NOT NULL)";
    sqlCmd << "SELECT Product FROM Win32_BaseBoard WHERE (Product IS NOT NULL)";

    QStringList columnName;
    columnName.clear();
    columnName << "MACAddress";
    columnName << "PNPDeviceID";
    columnName << "SerialNumber";
    columnName << "ProcessorId";
    columnName << "SerialNumber";
    columnName << "Product";

    QAxObject *objIWbemLocator = new QAxObject("WbemScripting.SWbemLocator");
    QAxObject *objWMIService = objIWbemLocator->querySubObject("ConnectServer(QString&,QString&)",QString("."), QString("root\\cimv2"));
    QString query;
    if ( type < sqlCmd.size() ) {
        query = sqlCmd.at(type);
    }

    QAxObject *objInterList = objWMIService->querySubObject("ExecQuery(QString&))", query);
    QAxObject *enum1 = objInterList->querySubObject("_NewEnum");

    IEnumVARIANT *enumInterface = 0;
    enum1->queryInterface(IID_IEnumVARIANT, (void**)&enumInterface);
    enumInterface->Reset();

    for ( int i = 0; i < objInterList->dynamicCall("Count").toInt(); ++i )
    {
        VARIANT *theItem = (VARIANT*)malloc(sizeof(VARIANT));
        if ( enumInterface->Next(1, theItem, NULL) != S_FALSE )
        {
            QAxObject *item = new QAxObject((IUnknown *)theItem->punkVal);
            if (item) {
                if ( typedynamicCall(tempConstChar).toString();
                }
            }
        }
    }

    return hwInfo;
}

生成KEY

QString BMachineControl::getKey(QString machineinfo, QString ddMMyyyy, int months)
{
    QString originalStr120;
    if ( machineinfo.isEmpty() ) {
        originalStr120 = QString("machineinfo") + ddMMyyyy + QString::number(months);
    } else {
        originalStr120 = machineinfo + ddMMyyyy + QString::number(months);
    }
    QCryptographicHash sha1(QCryptographicHash::Sha1);

    QByteArray datagram(originalStr120.toLatin1());

    for ( int i = 0; i != datagram.size(); ++i )
    {
        datagram[i] = datagram[i] ^ 'q' ^ 'y';
    }

    const char* tempConstChar = datagram.data();
    sha1.addData(tempConstChar);

    QString activeCode = sha1.result().toHex();

    return activeCode;
}

在软件启动时检测是否过期

#include "mainwindow.h"
#include 
#include 
#include "bmachinecontrol.h"

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);

    // 读取注册表中设置的软件使用期限
    BMachineControl m_machine;

    if ( m_machine.initializeReg() ) {
        QMessageBox::information(nullptr, "Error", "No key !  ", QMessageBox::Ok);
        return 0;
    }

    if ( !m_machine.judgeFile() ) {
        QMessageBox::information(nullptr, "Error", "File Corruption !  ", QMessageBox::Ok);
        return 0;
    }

    if ( !m_machine.judgeDate() ) {
        QMessageBox::information(nullptr, "Error", "Invalid Key ! 0  ", QMessageBox::Ok);
        return 0;
    }

    int days = m_machine.judgeKey();
    if ( days == -1 ) {
        QMessageBox::information(nullptr, "Error", "Invalid Key ! -1  ", QMessageBox::Ok);
        return 0;
    } else if ( days == -2 ) {
        QMessageBox::information(nullptr, "Error", "Invalid Key ! -2  ", QMessageBox::Ok);
        return 0;
    } else {
        if (days <= 7) {
            QMessageBox::information(nullptr, "Info", "Days Remaining: " + QString::number(days) + " !  ", QMessageBox::Ok);
        }
    }

    m_machine.refreshDT1();

    MainWindow w;
    w.show();
    return a.exec();
}

清空注册表

 本文福利，莬费领取Qt开发学习资料包、技术视频，内容包括（C++语言基础，Qt编程入门，QT信号与槽机制，QT界面开发-图像绘制，QT网络，QT数据库编程，QT项目实战，QSS，OpenCV，Quick模块，面试题等等）↓↓↓↓↓↓见下面↓↓文章底部点击莬费领取↓↓