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在很多商业软件中,需要提供一些可以试运行的版本,这样就需要配套密钥机制来控制,纵观大部分的试用版软件,基本上采用以下几种机制来控制。
1、远程联网激活,每次启动都联网查看使用时间等,这种方法最完美,缺点是没法联网的设备就歇菜了。
2、通过获取本地的硬盘、CPU等硬件的编号,做一个运算,生成一个激活码,超过半数的软件会采用此方法,缺点是不能自由控制软件的其他参数,比如软件中添加的设备数量的控制。
3、设定一个运行到期时间+数量限制+已运行时间的密钥文件,发给用户配套软件使用,缺点是如果仅仅设置的是运行到期时间,用户可以更改电脑时间来获取更长的使用时间,在电脑不联网的情况下。
本demo实现第2种方式;
第3中方式请参考:
Qt编写密钥生成器+使用demo(开源)_Qt自定义控件大全+UI定制+输入法+视频监控+物联网-CSDN博客
1、软件A(KeyDemo)首次运行弹出输入注册码(密钥)对话框,点击“获取机器码”,把机器码(系统的UUID)发送给商家;
2、商家使用密钥生成器(Key)生成注册码(密钥),给软件A;
3、软件A输入注册码,点击“确认”,软件正常启动;
4、第二次运行软件A时,若还是同一台电脑,则直接正常运行;若不是同一台电脑则弹出输入注册码对话框;
1、win+r,打开命令提示符,输入wmic,点击确定
2、输入csproduct,回车(enter),UUID即为一会要用到的机器码
如何查看windows系统UUID_weixin_33690963的博客-CSDN博客
3、cmd运行wmic提示
‘wmic‘ 不是内部或外部命令,也不是可运行的程序或批处理文件
或出现以下提示
解决办法:
①win+r,打开命令提示符,输入sysdm.cpl,点击确定
②选择“高级”->“环境变量”
③“系统变量”->“Path”->编辑
④“新建”,输入“C:\Windows\System32\wbem”,点击“确定”,之后就可以正常运行wmic了
cmd运行wmic提示‘wmic‘ 不是内部或外部命令,也不是可运行的程序或批处理文件_东京没有下雨天-CSDN博客_wmic不是内部或外部命令
https://github.com/bricke/Qt-AES
先下载qaesencryption.cpp和qaesencryption.h,程序中会用到
1、新建Qt Widgets应用,名称为KeyDemo,基类选择QMainWindow;
2、添加新的Qt设计师界面类,名称为KeyDialog,界面样式如下
3、添加新的C++类,名称为KeyVerify
4、把下载好的qaesencryption.cpp和qaesencryption.h添加到工程中
1、KeyDialog.h
- #ifndef KEYDIALOG_H
- #define KEYDIALOG_H
-
- #include <QDialog>
-
- namespace Ui {
- class KeyDialog;
- }
-
- class KeyDialog : public QDialog
- {
- Q_OBJECT
-
- public:
- explicit KeyDialog(QWidget *parent = nullptr);
- ~KeyDialog();
-
- static QString g_key;
-
- private slots:
- void on_cancelButton_clicked();
-
- void on_okButton_clicked();
-
- void on_uuidButton_clicked();
-
- private:
- Ui::KeyDialog *ui;
- };
-
- #endif // KEYDIALOG_H
2、KeyDialog.cpp
- #include "KeyDialog.h"
- #include "ui_KeyDialog.h"
- #include <QProcess>
- #include <QMessageBox>
- #include <QFile>
- QString KeyDialog::g_key = "";
-
- KeyDialog::KeyDialog(QWidget *parent) :
- QDialog(parent),
- ui(new Ui::KeyDialog)
- {
- ui->setupUi(this);
- ui->uuidEdit->setVisible(false);
- ui->tipsLabel->setVisible(false);
- }
-
- KeyDialog::~KeyDialog()
- {
- delete ui;
- }
-
- void KeyDialog::on_cancelButton_clicked()
- {
- exit(0);
- }
-
- void KeyDialog::on_okButton_clicked()
- {
- g_key = ui->keyEdit->text();
- this->close();
- }
-
- //获取UUID
- void KeyDialog::on_uuidButton_clicked()
- {
- QString cmd = "wmic csproduct get uuid";
- QProcess p;
- p.start(cmd);
- p.waitForFinished();
-
- QString result = QString::fromLocal8Bit(p.readAllStandardOutput());
- QStringList list = cmd.split(" ");
- result = result.remove(list.last(), Qt::CaseInsensitive);
- result = result.replace("\r", "");
- result = result.replace("\n", "");
- result = result.simplified();
-
- p.kill();
- p.close();
-
- ui->tipsLabel->setVisible(true);
- ui->uuidEdit->setVisible(true);
- ui->uuidEdit->setText(result);
- }
3、KeyVerify.h
- #ifndef KEYVERIFY_H
- #define KEYVERIFY_H
- #include <QObject>
- class KeyVerify
- {
- public:
- KeyVerify();
- private slots:
- void initSystem(); //初始化
- QString getUUID(); //获取唯一标识
- bool enterKey(); //输入密钥
- QString encodedText(QString, QString key = "zxcvbnm"); //加密
- QString decodedText(QString, QString key = "zxcvbnm"); //解密
- };
- #endif // KEYVERIFY_H
4、KeyVerify.cpp
- #include "KeyVerify.h"
- #include <QCryptographicHash>
- #include <QDebug>
- #include <QFile>
- #include <QProcess>
- #include <QMessageBox>
- #include <QMutex>
- #include <QApplication>
- #include "qaesencryption.h"
- #include "KeyDialog.h"
-
- KeyVerify::KeyVerify()
- {
- initSystem();
- }
-
- void KeyVerify::initSystem()
- {
- QString keyName = qApp->applicationDirPath() + "/key.db";
- QFile keyFile(keyName);
-
- //密钥文件不存在
- if (!keyFile.exists() || keyFile.size() == 0)
- {
- //弹出输入密钥界面
- if(!enterKey()) //密钥不对
- {
- exit(0);
- }
- }
- else
- {
- //读取密钥文件
- keyFile.open(QFile::ReadOnly);
- QByteArray keyData = keyFile.readAll();
- keyFile.close();
-
- QString decodedStr = decodedText(QString::fromLatin1(keyData));
-
- QString uuid = getUUID();
-
- if(uuid != decodedStr) //密钥不对
- {
- int ret = QMessageBox::critical(nullptr, "错误", "密钥文件不对,请联系供应商!", QMessageBox::Ok, QMessageBox::Cancel);
- if( ret == QMessageBox::Ok)
- {
- if(!enterKey()) //密钥不对
- {
- keyFile.close();
- exit(0);
- }
- }
- else
- {
- keyFile.close();
- exit(0);
- }
- }
- keyFile.close();
- }
- }
-
- //获取电脑UUID
- QString KeyVerify::getUUID()
- {
- QString cmd = "wmic csproduct get uuid";
- QProcess p;
- p.start(cmd);
- p.waitForFinished();
-
- QString result = QString::fromLocal8Bit(p.readAllStandardOutput());
- QStringList list = cmd.split(" ");
- result = result.remove(list.last(), Qt::CaseInsensitive);
- result = result.replace("\r", "");
- result = result.replace("\n", "");
- result = result.simplified();
-
- p.kill();
- p.close();
-
- return result;
- }
-
- //输入密钥
- bool KeyVerify::enterKey()
- {
- //弹出输入密钥界面
- KeyDialog keyDialog;
- keyDialog.exec();
-
- if(KeyDialog::g_key != "")
- {
- //解密
- QString decodedStr = decodedText(KeyDialog::g_key);
- //获取本地uuid
- QString uuid = getUUID();
- //对比
- if(uuid != decodedStr)
- {
- QMessageBox::critical(nullptr, "错误", "密钥文件不对,请联系供应商!");
- return false;
- }
- else
- {
- QFile keyFile(qApp->applicationDirPath() + "/key.db");
- //存储
- keyFile.open(QFile::WriteOnly);
- keyFile.write(KeyDialog::g_key.toLatin1());
- keyFile.close();
- }
- }
- else
- {
- QMessageBox::critical(nullptr, "错误", "密钥不能为空");
- return false;
- }
- return true;
- }
-
- //加密
- QString KeyVerify::encodedText(QString data, QString key)
- {
- QAESEncryption encryption(QAESEncryption::AES_128, QAESEncryption::ECB, QAESEncryption::ZERO);
- QByteArray hashKey = QCryptographicHash::hash(key.toUtf8(), QCryptographicHash::Md5);
- QByteArray encodedText = encryption.encode(data.toUtf8(), hashKey);
- QString encodeTextStr = QString::fromLatin1(encodedText.toBase64());
- //qDebug()<< "encodedText:"<< encodeTextStr;
-
- return encodeTextStr;
- }
-
- //解密
- QString KeyVerify::decodedText(QString data, QString key)
- {
- QAESEncryption encryption(QAESEncryption::AES_128, QAESEncryption::ECB, QAESEncryption::ZERO);
- QByteArray hashKey = QCryptographicHash::hash(key.toUtf8(), QCryptographicHash::Md5);
- QByteArray decodedText = encryption.decode(QByteArray::fromBase64(data.toLatin1()), hashKey);
- QString decodedTextStr = QString::fromLatin1(decodedText);
- //qDebug()<<"decodedText:"<< decodedTextStr;
-
- return decodedTextStr;
- }
5、main.cpp
- #include "MainWindow.h"
- #include <QApplication>
- #include "KeyVerify.h"
-
- int main(int argc, char *argv[])
- {
- QApplication a(argc, argv);
-
- //密钥验证
- KeyVerify k;
-
- MainWindow w;
- w.show();
-
- return a.exec();
- }
1、新建Qt Widgets应用,名称为Key,基类选择QMainWindow,界面设计如下
2、把下载好的qaesencryption.cpp和qaesencryption.h添加到工程中
1、MainWindow.h
- #ifndef MAINWINDOW_H
- #define MAINWINDOW_H
-
- #include <QMainWindow>
-
- namespace Ui {
- class MainWindow;
- }
-
- class MainWindow : public QMainWindow
- {
- Q_OBJECT
-
- public:
- explicit MainWindow(QWidget *parent = nullptr);
- ~MainWindow();
-
- private slots:
- void on_keyButton_clicked();
-
- QString encodedText(QString data, QString key);
-
- private:
- Ui::MainWindow *ui;
- };
-
- #endif // MAINWINDOW_H
2、MainWindow.cpp
- #include "MainWindow.h"
- #include "ui_MainWindow.h"
- #include <QMessageBox>
- #include <QCryptographicHash>
- #include <QDebug>
- #include "qaesencryption.h"
-
- MainWindow::MainWindow(QWidget *parent) :
- QMainWindow(parent),
- ui(new Ui::MainWindow)
- {
- ui->setupUi(this);
- }
-
- MainWindow::~MainWindow()
- {
- delete ui;
- }
-
- void MainWindow::on_keyButton_clicked()
- {
- if(ui->uuidEdit->text().isEmpty())
- {
- QMessageBox::critical(this, tr("提示"), tr("机器码不能为空"));
- return;
- }
-
- if(ui->passwordEdit->text().isEmpty())
- {
- QMessageBox::critical(this, tr("提示"), tr("密码不能为空"));
- return;
- }
-
- //加密
- QString key = encodedText(ui->uuidEdit->text(), ui->passwordEdit->text());
- ui->keyEdit->setText(key);
- ui->keyEdit->setFocus();
- }
-
- //加密
- QString MainWindow::encodedText(QString data, QString key)
- {
- //使用QCryptographicHash(只能加密不能解密)类对密码进行加密
- QByteArray hashKey = QCryptographicHash::hash(key.toUtf8(), QCryptographicHash::Md5);
-
- //使用AES加密
- QAESEncryption encryption(QAESEncryption::AES_128, QAESEncryption::ECB, QAESEncryption::ZERO);
-
- QByteArray encodedText = encryption.encode(data.toUtf8(), hashKey);
- QString encodeTextStr = QString::fromLatin1(encodedText.toBase64());
- //qDebug()<< "encodedText:"<< encodeTextStr << encodedText;
-
- return encodeTextStr;
- }
1、先运行KeyDemo,弹出输入密钥对话框
2、点击“获取机器码”,把机器码给商家(软件Key)
3、运行软件Key,输入机器码和密码,点击生成密钥,Ctrl+a、Ctrl+v复制密钥,把密钥发送给KeyDemo软件;
注:密码需要和KeyDemo工程中KeyVerify.h的“zxcvbnm”一样
QString encodedText(QString, QString key = "zxcvbnm"); //加密
QString decodedText(QString, QString key = "zxcvbnm"); //解密
4、KeyDemo软件输入密钥后,点击“确定”,软件正常运行,弹出主界面
5、KeyDemo软件若还在刚才的电脑上第二次运行,会直接弹出主界面;若不是在同一台电脑上则弹出输入密钥对话框;
6、KeyDemo程序可执行文件exe的同级目录下用key.db文件,里面保存着输入的密钥
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