#include <QtCrypto>
#include <stdio.h>
#include <QCoreApplication>

int main(int argc, char **argv)
{
    QCoreApplication app(argc, argv);
    QCA::Initializer init;

    QByteArray arg = "hello";
    QCA::SecureArray key("secret");

    QStringList f = QCA::supportedFeatures();
    for (QStringList::iterator i = f.begin(); i != f.end(); i++)
        printf("feature: %s\n", (*i).toLocal8Bit().constData());

    if (!QCA::isSupported("hmac(sha1)")) {
        printf("HMAC(SHA1) not supported!\n");
    } else {
        QCA::MessageAuthenticationCode hmacObject("hmac(sha1)", QCA::SecureArray());
        QCA::SymmetricKey keyObject(key);
        hmacObject.setup(key);
        // ...
    }

    return 0;
}