Qt 使用异或进行加密解密

#include <QtCore/QCoreApplication>
#include <QTextCodec>
#include <QString>
#include <QDebug>

QString getXorEncryptDecrypt(const QString &, const char &);
QString byteToQString(const QByteArray &byte);
QByteArray qstringToByte(const QString &strInfo);

int main(int argc, char *argv[])
{
QCoreApplication a(argc, argv);
QString str = QString("http://www.baidu.com?id=1");
QString jiami = getXorEncryptDecrypt(str, 11);
qDebug() << "str:" << str;
qDebug() << "miwen:" << jiami;
QString jiemi = getXorEncryptDecrypt(jiami, 11);
qDebug() << "jimi:" << jiemi;
return a.exec();
}

QString getXorEncryptDecrypt(const QString &str, const char &key)
{
QString result;
QByteArray bs = qstringToByte(str);

for(int i=0; i<bs.size(); i++){
bs[i] = bs[i] ^ key;
}

result = byteToQString(bs);
return result;
}

QString byteToQString(const QByteArray &byte)
{
QString result;
if(byte.size() > 0){
QTextCodec *codec = QTextCodec::codecForName("utf-8");
result = codec->toUnicode(byte);
}

return result;
}

QByteArray qstringToByte(const QString &strInfo)
{
QByteArray result;
if(strInfo.length() > 0){
QTextCodec *codec = QTextCodec::codecForName("utf-8");
result = codec->fromUnicode(strInfo);
}

return result;
}

void QLogin::encryption()
{
if( m_flagserver == 0)
{
m_server = getXorEncryptDecrypt(m_server, 11);
m_flagserver = 1;
}

if( m_flagjid == 0 )
{
m_jid = getXorEncryptDecrypt(m_jid, 11);
m_flagjid = 1;
}

if( m_flagpassword == 0)
{
m_password = getXorEncryptDecrypt(m_password, 11);
m_flagpassword = 1;
}
}
void QLogin::decryption()
{
m_server = getXorEncryptDecrypt(m_server, 11);
m_jid = getXorEncryptDecrypt(m_jid, 11);
m_password = getXorEncryptDecrypt(m_password, 11);
}