cryptor.cpp

#include "cryptor.h"
#include <iostream>

using namespace std;

Cryptor::Cryptor()
{
    data.clear();
}
Cryptor::Cryptor(QString crypt_file_name)
{
    data.clear();
    setCryptFileName(crypt_file_name);
}
Cryptor::~Cryptor()
{}
Cryptor::CryptorException::CryptorException(QString _what)
{
    what = _what;
}
void Cryptor::CryptorException::errmsg()
{
    cerr << "\n#error [CRYPTOR] : " << what.toStdString();
}

void Cryptor::setCryptFileName(QString crypt_file_name)
{
    file.setFileName(crypt_file_name);
}
void Cryptor::encryptFile()
{
    if(!file.exists())
        throw CryptorException("file \"" + file.fileName() + "\" does not exist...");

    if(!file.isOpen())
        file.open(QIODevice::Unbuffered | QIODevice::ReadWrite);

    QByteArray buff;
    buff = file.readAll();

    data.clear();

    QByteArray::iterator buff_iter = buff.end();
    while(buff_iter >= buff.begin())
    {
        if(*buff_iter != '\0')
            data += *buff_iter--;
        else
            buff_iter--;
    }

    buff = data.toBase64();
    data.clear();

    buff_iter = buff.end();
    while(buff_iter >= buff.begin())
    {
        if(*buff_iter != '\0')
            data += *buff_iter--;
        else
            buff_iter--;
    }

    buff = data;

    file.close();
    file.open(QIODevice::ReadWrite | QIODevice::Unbuffered | QIODevice::Truncate);

    file.write(buff);
    file.close();
}
void Cryptor::decryptFile()
{
    if(!file.exists())
        throw CryptorException("file \"" + file.fileName() + "\" does not exist...");

    if(!file.isOpen())
        file.open(QIODevice::Unbuffered | QIODevice::ReadWrite);

    QByteArray buff;
    buff = file.readAll();

    data.clear();

    QByteArray::iterator buff_iter = buff.end();
    while(buff_iter >= buff.begin())
    {
        if(*buff_iter != '\0')
            data += *buff_iter--;
        else
            buff_iter--;
    }

    buff = QByteArray::fromBase64(data);
    data.clear();

    buff_iter = buff.end();
    while(buff_iter >= buff.begin())
    {
        if(*buff_iter != '\0')
            data += *buff_iter--;
        else
            buff_iter--;
    }

    buff = data;

    file.close();
    file.open(QIODevice::ReadWrite | QIODevice::Unbuffered | QIODevice::Truncate);

    file.write(buff);
    file.close();
}