用AES来加密和解密文件

来源：互联网发布：tomcat启动端口号编辑：程序博客网时间：2024/06/06 20:04

因工作需要，需要给文件加密，在网上找寻多时，找到有人写的aes的类，可以供QT使用

转载了人家的测试代码，

int main(int argc, char *argv[]){    QCoreApplication a(argc, argv);    TAesClass *aes = new TAesClass;    char mingwen[1024] = "helloworld";    DWORD size = strlen(mingwen);    char miwen[1024];    char jiemi[1024];    UCHAR key[1024] = "aabbcc";    UCHAR *p = key;    aes->InitializePrivateKey(16, p); //进行初始化    aes->OnAesEncrypt((LPVOID)mingwen, size, (LPVOID)miwen); //进行加密    aes->OnAesUncrypt((LPVOID)miwen, (DWORD)sizeof(miwen),(LPVOID)jiemi); //进行解密    //打印信息    qDebug() << "mingwen:" << mingwen;    qDebug() << "miwen:" << miwen;    qDebug() << "jiemi:" <<jiemi;    free(aes);    aes = 0;    return a.exec();}

这儿首先需要设置key，然后在初始化后只要使用

    aes->OnAesEncrypt((LPVOID)mingwen, size, (LPVOID)miwen); //进行加密    aes->OnAesUncrypt((LPVOID)miwen, (DWORD)sizeof(miwen),(LPVOID)jiemi); //进行解密

就可以进行加解密字符串

char mingwen[1024] = "helloworld";

就是需要加密的字符串

在此基础上，做了些改变，让他可以加密文件

void Widget::encrypt(){    QString filename;    filename=QFileDialog::getOpenFileName(this,                                          tr("选择文件"),                                          "",                                          tr("Files (*.*)"));    QFile file(filename);                 //判断文件名    static QByteArray dat;    char *m_pUChar;    intm_iAllByte;    //传输文件    file.open(QIODevice::ReadWrite);    dat = file.readAll();    m_pUChar = dat.data();    m_iAllByte = dat.size();    //获得文件大小    qDebug() << m_iAllByte;    file.close();    TAesClass *aes = new TAesClass;    char miwen[m_iAllByte * 4];    UCHAR key[1024] = "aabbcc";    UCHAR *p = key;    aes->InitializePrivateKey(32, p); //进行初始化   int  len = aes->OnAesEncrypt((LPVOID)m_pUChar, m_iAllByte, (LPVOID)miwen); //进行加密    QFile file2("1.data");

    file2.open(QIODevice::WriteOnly);    file2.write(miwen ,len);    file2.close();    free(aes);    aes = 0;}

void Widget::decrypt(){    QString filename;    filename=QFileDialog::getOpenFileName(this,                                          tr("选择文件"),                                          "",                                          tr("Files (*.*)"));    QFile file(filename);                 //判断文件名    static QByteArray dat;    char *m_pUChar;    intm_iAllByte;    //传输文件    file.open(QIODevice::ReadWrite);    dat = file.readAll();    m_pUChar = dat.data();    m_iAllByte = dat.size();    //获得文件大小    //m_iAllByte = file->size();    //获得文件大小    qDebug() << m_iAllByte;    file.close();    TAesClass *aes = new TAesClass;    char jiemi[m_iAllByte * 3];    UCHAR key[1024] = "aabbcc";    UCHAR *p = key;    aes->InitializePrivateKey(32, p); //进行初始化    int len = aes->OnAesUncrypt((LPVOID)m_pUChar, m_iAllByte,(LPVOID)jiemi); //进行解密    qDebug() << "len = "<< len;    QFile file2("jiemi.png");    file2.open(QIODevice::WriteOnly);    file2.write(jiemi ,len);    file2.close();}

void Widget::encrypt()用来加密文件

void Widget::decrypt()用来解密文件

AES的类也已经上传了，有需要的人去下载，地址是：

AES加密的类

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