# hextest.cpp

The code below shows some simple operations on a QCA::Hex object, converting between QCA::SecureArray and QString.

    /*
     Copyright (C) 2005 Brad Hards <bradh@frogmouth.net>

     Permission is hereby granted, free of charge, to any person obtaining a copy
     of this software and associated documentation files (the "Software"), to deal
     in the Software without restriction, including without limitation the rights
     to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
     copies of the Software, and to permit persons to whom the Software is
     furnished to do so, subject to the following conditions:

     The above copyright notice and this permission notice shall be included in
     all copies or substantial portions of the Software.

     THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
     AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
     AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
     CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
    */

    // QtCrypto has the declarations for all of QCA
    #include <QtCrypto>

    #include <QCoreApplication>

    #include <iostream>

    int main(int argc, char **argv)
    {
            // the Initializer object sets things up, and
            // also does cleanup when it goes out of scope
            QCA::Initializer init;

            QCoreApplication app(argc, argv);

            // we use the first argument as the data to encode / decode
            // if an argument is provided. Use "hello" if no argument
            QByteArray arg; // empty array
            arg.append((argc >= 2) ? argv[1] : "hello");

            // create our object, which does encoding by default
            // QCA::Hex encoder(QCA::Encode); is equivalent
            QCA::Hex encoder;

            // You might prefer to use encoder.encode(); and have
            // it return a QCA::SecureArray, depending on your needs
            QString encoded = encoder.arrayToString(arg);

            std::cout << arg.data() << " in hex encoding is ";
            std::cout << encoded.toLatin1().data() << std::endl;

            // This time, we'll create an object to decode hexadecimal.
            // We could also have reused the existing object, calling
            // clear(); and setup(QCA::Decode); on it.
            QCA::Hex decoder(QCA::Decode);

            // This time, we convert a QString into a QString
            QString decoded = decoder.decodeString(encoded);

            std::cout << encoded.toLatin1().data() << " decoded from hex is ";
            std::cout << decoded.toLatin1().data() << std::endl;

            return 0;
    }