QT下的base的加密

Qt之QCustomPlot（图形库）
//加密,保存password
QString password = ui->pswLineEdit->text().trimmed();
QByteArray passArray = password.toAscii();
QSqlQuery query;
query.prepare(QString(“insert into User(username, password, cardno, usertype) values (:username, :password, :cardno, :usertype)”));
query.addBindValue(userName);
query.addBindValue(passArray.toBase64());
query.addBindValue(cardNo);
query.addBindValue(0);
if(query.exec())
{
//succeed
}

//解密,验证登陆  QString password = ui->pswLineEdit->text().trimmed();  QSqlQuery query;  query.exec(QString("select password from User where username = '%1'").arg(username));  if(!query.isActive())  {      //查询数据库错误  }  if(!query.next())  {      //用户名不存在  }  else  {      QString dataPassword = query.value(0).toString();      //decrypt      QByteArray tempArray = QByteArray::fromBase64(dataPassword.toAscii());      if(password != QString(tempArray))      //...  }