Qt编写密钥生成器+使用demo

#include "appkey.h" #include "qmutex.h" #include "qfile.h" #include "qtimer.h" #include "qdatetime.h" #include "qapplication.h" #include "qmessagebox.h" AppKey *AppKey::self = NULL; AppKey *AppKey::Instance() { if (!self) { QMutex mutex; QMutexLocker locker(&mutex); if (!self) { self = new AppKey; } } return self; } AppKey::AppKey(QObject *parent) : QObject(parent) { keyData = ""; keyUseDate = false; keyDate = "2017-01-01"; keyUseRun = false; keyRun = 1; keyUseCount = false; keyCount = 10; timer = new QTimer(this); timer->setInterval(1000); connect(timer, SIGNAL(timeout()), this, SLOT(checkTime())); startTime = QDateTime::currentDateTime(); } void AppKey::start() { //判断密钥文件是否存在,不存在则从资源文件复制出来,同时需要设置文件写权限 QString keyName = qApp->applicationDirPath() + "/key.db"; QFile keyFile(keyName); if (!keyFile.exists() || keyFile.size() == 0) { QMessageBox::critical(0, "错误", "密钥文件丢失,请联系供应商!"); exit(0); } //读取密钥文件 keyFile.open(QFile::ReadOnly); keyData = keyFile.readLine(); keyFile.close(); //将从注册码文件中的密文解密,与当前时间比较是否到期 keyData = getXorEncryptDecrypt(keyData, 110); QStringList data = keyData.split("|"); if (data.count() != 6) { QMessageBox::critical(0, "错误", "注册码文件已损坏,程序将自动关闭!"); exit(0); } keyUseDate = (data.at(0) == "1" ? true : false); keyDate = data.at(1); keyUseRun = (data.at(2) == "1" ? true : false); keyRun = data.at(3).toInt(); keyUseCount = (data.at(4) == "1" ? true : false); keyCount = data.at(5).toInt(); //如果启用了时间限制 if (keyUseDate) { QString nowDate = QDate::currentDate().toString("yyyy-MM-dd"); if (nowDate > keyDate) { QMessageBox::critical(0, "错误", "软件已到期,请联系供应商更新注册码!"); exit(0); } } //如果启用了运行时间显示 if (keyUseRun) { timer->start(); } } void AppKey::stop() { timer->stop(); } void AppKey::checkTime() { //找出当前时间与首次启动时间比较 QDateTime now = QDateTime::currentDateTime(); if (startTime.secsTo(now) >= (keyRun * 60)) { QMessageBox::critical(0, "错误", "试运行时间已到,请联系供应商更新注册码!"); exit(0); } } QString AppKey::getXorEncryptDecrypt(const QString &data, char key) { //采用异或加密,也可以自行更改算法 QByteArray buffer = data.toLatin1(); int size = buffer.size(); for (int i = 0; i < size; i++) { buffer[i] = buffer.at(i) ^ key; } return QLatin1String(buffer); } bool AppKey::checkCount(int count) { if (keyUseCount) { if (count >= keyCount) { QMessageBox::critical(0, "错误", "设备数量超过限制,请联系供应商更新注册码!"); return false; } } return true; }