qt base64加解密

这里提供两种加解密的方法。
第一种方法：使用QByteArray的toBase64和fromBase64来实现。
第二种方法：使用base64.cpp文件中的base64_encode和base64_decode来实现。下载地址

代码示例如下：

#ifndef WIDGET_H
#define WIDGET_H

#include <QtWidgets>

QT_BEGIN_NAMESPACE
namespace Ui { class Widget; }
QT_END_NAMESPACE

class Widget : public QWidget
{
    Q_OBJECT

public:
    Widget(QWidget *parent = nullptr);
    ~Widget();

private:
    Ui::Widget *ui;

    QPushButton* m_encryptbtn;
    QPushButton* m_decryptbtn;
    QLineEdit* m_encryptedit;
    QLineEdit* m_decryptedit;
};
#endif // WIDGET_H

.cpp

#include "widget.h"
#include "ui_widget.h"
#include "mycrypto.h"

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

    m_encryptbtn = new QPushButton("encrypt",this);
    m_decryptbtn = new QPushButton("decrypt",this);

    m_decryptedit = new QLineEdit(this);
    m_encryptedit = new QLineEdit(this);

    QGridLayout* lay = new QGridLayout(this);
    lay->addWidget(m_encryptedit,0,0,1,1);
    lay->addWidget(m_decryptedit,0,1,1,1);
    lay->addWidget(m_encryptbtn,1,0,1,1);
    lay->addWidget(m_decryptbtn,1,1,1,1);
    this->setLayout(lay);

    connect(m_encryptbtn,&QPushButton::clicked,this,[=](){
#if 0 //方法一
        m_decryptedit->setText(m_encryptedit->text().toLocal8Bit().toBase64());
#else //方法二
        m_decryptedit->setText(MyCrypto::encrypt(m_encryptedit->text().toStdString()).data());
#endif
    });
    connect(m_decryptbtn,&QPushButton::clicked,this,[=](){
#if 0
        m_encryptedit->setText(QByteArray::fromBase64(m_decryptedit->text().toLocal8Bit()));
#else
        m_encryptedit->setText(MyCrypto::decrypt(m_decryptedit->text().toStdString()).data());
#endif
    });
}

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

.h

#ifndef MYCRYPTO_H
#define MYCRYPTO_H

#include <QString>
#include <iostream>
#include <windows.h>
#include <tchar.h>
#include <QDataStream>

class MyCrypto
{
public:
    static const std::string encrypt(const std::string & orignal);
    static const std::string decrypt(const std::string & orignal);
};

#endif // MYCRYPTO_H

.cpp

#include "mycrypto.h"
#include <QString>
#include <QDebug>
#include <iostream>
#include <bitset>
#include <cstdlib>
#include <cmath>
#include <algorithm>
#include <cctype>
#include <string>
#include <base64.h>
using namespace std;

/**
 * @brief MyCrypto::encrypt  加密
 * @param orignal
 * @return
 */
const std::string MyCrypto::encrypt(const std::string &orignal)
{
    std::string encoded = base64_encode(reinterpret_cast<const unsigned char*>(orignal.c_str()), orignal.length());
    return encoded;
}


/**
 * @brief MyCrypto::decrypt 解密
 * @param orignal
 * @return
 */
const std::string MyCrypto::decrypt(const std::string &orignal)
{
    std::string decoded = base64_decode(orignal);
    return decoded;
}