store the challenge in a QByteArray to be sure it isn't deallocated
store the challenge in a QByteArray to be sure it isn't deallocated

eworm-de/yubikey-personalization-gui,Yubico/yubikey-personalization-gui,Yubico/yubikey-personalization-gui,eworm-de/yubikey-personalization-gui,Yubico/yubikey-personalization-gui,eworm-de/yubikey-personalization-gui