I added a part in the main.cpp file that asks for a password before the window opens. It gets what it needs from the help.h and cnstnt.h files. Then I created a dialog named settings and tried to change the password here. It was working fine in my previous test project, but when I used the same things in this project, I encountered a first defined here error. I checked, I did run qmake and rebuild but nothing changed. How can I fix this problem? I'm new to C++ and QT.
here is my codes
main.cpp
#include "mainwindow.h"
#include <QApplication>
#include <QMessageBox>
#include "cnstnt.h"
#include "help.h"
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
a.setStyle("fusion");
a.setQuitOnLastWindowClosed(false);
MainWindow w;
QString login = QInputDialog::getText(NULL, "Login","username",QLineEdit::Normal);
if (login == cnstnt::username)
{
QString getPassword = QInputDialog::getText(NULL, "Login","password",QLineEdit::Password);
QString hashpassword = hlpr::hashPassword(getPassword.toUtf8());
if(hashpassword == hlpr::getTxtPassword()){
w.show();
}else{
QMessageBox::warning(nullptr, "error!", "wrong password!");
}
}
else
{
QMessageBox::warning(nullptr, "error!", "wrong username!");
}
return a.exec();
}
cnstnt.h
#ifndef CNSTNT_H
#define CNSTNT_H
#include <QtWidgets>
namespace cnstnt {
QString TEXT_DIR = QStandardPaths::writableLocation(QStandardPaths::DocumentsLocation) + "/test/password.txt";
QString username = "admin";
}
#endif // CNSTNT_H
help.h
#ifndef HELP_H
#define HELP_H
#include <QCryptographicHash>
#include "cnstnt.h"
namespace hlpr {
// login actions
QString hashPassword(QByteArray str){
QByteArray step1 = QCryptographicHash::hash((str),QCryptographicHash::Md5).toHex();
QString lastHash = QString(QCryptographicHash::hash((step1),QCryptographicHash::Sha512).toHex());
return lastHash;
}
QString getTxtPassword(){
QString currentPassword;
QFile file(cnstnt::TEXT_DIR);
if (file.open(QIODevice::ReadOnly | QIODevice::Text)){
QTextStream in(&file);
currentPassword = in.readLine();
file.close();
}
return currentPassword;
}
bool setTxtPassword(QString newPass){
QFile file(cnstnt::TEXT_DIR);
if(file.open(QIODevice::WriteOnly | QIODevice::Truncate)){
QTextStream stream(&file);
QByteArray newPassType = newPass.toUtf8();
stream << hashPassword(newPassType);
file.close();
return true;
}
return false;
}
}
#endif // HELP_H
settingdialog.h
#ifndef SETTINGDIALOG_H
#define SETTINGDIALOG_H
#include <QDialog>
#include <QMessageBox>
#include "help.h"
namespace Ui {
class settingDialog;
}
class settingDialog : public QDialog
{
Q_OBJECT
public:
explicit settingDialog(QWidget *parent = nullptr);
~settingDialog();
private slots:
void on_pushButton_8_clicked();
private:
Ui::settingDialog *ui;
};
#endif // SETTINGDIALOG_H
settingdialog.cpp
#include "settingdialog.h"
#include "ui_settingdialog.h"
settingDialog::settingDialog(QWidget *parent) :
QDialog(parent),
ui(new Ui::settingDialog)
{
ui->setupUi(this);
}
settingDialog::~settingDialog()
{
delete ui;
}
void settingDialog::on_pushButton_8_clicked()
{
QString TEXT_DIR = QStandardPaths::writableLocation(QStandardPaths::DocumentsLocation) + "/test/password.txt";
QString savedPassword = hlpr::getTxtPassword();
QString curPassword = ui->oldPassBox->text();
QString newPass = ui->newPassBox->text();
QString confirmPass = ui->confirmPass->text();
QByteArray curHash = curPassword.toUtf8();
if(newPass != confirmPass) {
QMessageBox::information(this, "Bilgi", "Yeni şifreniz ile tekrarı eşleşmiyor!");
}else if(newPass == curPassword){
QMessageBox::information(this, "Bilgi", "Mevcut şifreniz ile yeni şifreniz ile aynı olamaz!");
}else if(savedPassword != hlpr::hashPassword(curHash)) {
QMessageBox::information(this, "Bilgi", "Mevcut şifreniz hatalı!");
}else{
bool status = hlpr::setTxtPassword(newPass);
if(status){
ui->oldPassBox->clear();
ui->newPassBox->clear();
ui->confirmPass->clear();
QMessageBox::information(this, "Başarılı", "Şifreniz başarıyla güncellendi.");
}else{
QMessageBox::warning(this, "Hata!", "Şifreniz güncellenirken hata oluştu!");
}
}
}
errors
- X:\DataLoggerQT\QtSerialMonitor-master\src\help.h:11: error:
multiple definition of
hlpr::passwordHash(QByteArray)' debug/mainwindow.o: In functionZSt19__iterator_categoryIPK7QStringENSt15iterator_traitsIT_E17iterator_categoryERKS4_': X:\DataLoggerQT\QtSerialMonitor-master\build-QtSerialMonitor-Desktop_Qt_5_15_2_MinGW_32_bit-Debug/../src/help.h:11: multiple definition of `hlpr::passwordHash(QByteArray)' - X:\DataLoggerQT\QtSerialMonitor-master\src\help.h:11: first defined here
- X:\DataLoggerQT\QtSerialMonitor-master\src\help.h:28: error: multiple definition of
hlpr::setTxtPassword(QString)' debug/moc_mainwindow.o: In functionZN4hlpr14setTxtPasswordE7QString': X:\DataLoggerQT\QtSerialMonitor-master\build-QtSerialMonitor-Desktop_Qt_5_15_2_MinGW_32_bit-Debug/debug/../../src/help.h:28: multiple definition of `hlpr::setTxtPassword(QString)'
