#include "gost89.h"
QByteArray gostEncodeCfb(const QByteArray &msg)
{
    static const unsigned char iv[16] {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
    QByteArray data64(msg); 
    while (data64.size() % 8) data64.append((char)0); 
    QByteArray data64Enc(data64.size(), 0);
    gost_enc_cfb(&ctx, iv, (const unsigned char*)data64.constData(), (unsigned char*)data64Enc.data(), data64.size() / 8);
    return data64Enc;
}