Qt实现数据进行加密、解密的步骤

#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_pushButton_clicked();

private:
    Ui::MainWindow *ui;
};

#endif // MAINWINDOW_H

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QCryptographicHash>
#include <QDebug>

MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
    ui->setupUi(this);
}

MainWindow::~MainWindow()
{
    delete ui;
}

void MainWindow::on_pushButton_clicked()
{
    QByteArray array;
    array.append(ui->lineEdit->text());
    QCryptographicHash hash(QCryptographicHash::Md5); //Md5加密
    hash.addData(array); //添加数据
    QByteArray retArray = hash.result(); //加密后的数据
    qDebug() << retArray.toHex(); //转化成16进制
}

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>
#include <QCryptographicHash>
#include <QDebug>
#include "qaesencryption.h"

namespace Ui {
class MainWindow;
}

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    explicit MainWindow(QWidget *parent = nullptr);
    ~MainWindow();

private slots:
    QString encodedText(QString data, QString key); //加密
    QString decodedText(QString data, QString key); //解密

private:
    Ui::MainWindow *ui;
};

#endif // MAINWINDOW_H

#include "MainWindow.h"
#include "ui_MainWindow.h"

MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
    ui->setupUi(this);

    QString data = "qwer123456"; //要加密的数据
    QString key = "9876543"; //密钥
    QString encoded = encodedText(data, key); //加密
    QString decoded = decodedText(encoded, key); //解密·
    qDebug() << "源数据：" << data;
    qDebug() << "加密：" << encoded;
    qDebug() << "解密：" << decoded;
}

MainWindow::~MainWindow()
{
    delete ui;
}

//使用AES对数据进行加    密
QString MainWindow::encodedText(QString data, QString key)
{
    //密钥长度AES_128,加密方式ECB,填充方式ZERO
    QAESEncryption encryption(QAESEncryption::AES_128, QAESEncryption::ECB,                 QAESEncryption::ZERO);

    //使用QCryptographicHash对密钥进行加密
    QByteArray hashKey = QCryptographicHash::hash(key.toUtf8(), QCryptographicHash::Sha1);

    //对源数据加密
    QByteArray encodedText = encryption.encode(data.toUtf8(), hashKey);

    //QByteArray转QString (toBase64()不能去掉)
    QString encodeTextStr = QString::fromLatin1(encodedText.toBase64());
    //qDebug()<< "encodedText:"<< encodeTextStr;

    return encodeTextStr;
}

//使用AES对数据进行解密
QString MainWindow::decodedText(QString data, QString key)
{
    //密钥长度AES_128,加密方式ECB,填充方式ZERO
    QAESEncryption encryption(QAESEncryption::AES_128, QAESEncryption::ECB,     QAESEncryption::ZERO);

    //使用QCryptographicHash对密钥进行加密
    QByteArray hashKey = QCryptographicHash::hash(key.toUtf8(), QCryptographicHash::Sha1);

    //解密
    QByteArray decodedText = encryption.decode(QByteArray::fromBase64(data.toLatin1()), hashKey);

    //QByteArray转QString
    QString decodedTextStr = QString::fromLatin1(decodedText);
    //qDebug()<<"decodedText:"<< decodedTextStr;

    return decodedTextStr;
}