Weird stuff in encryption method.

[martinrotter]

Why do you check was_open so many times in CryptoFactory::decryptData function implementation?

If file.open(QIODevice::OpenModeFlag::ReadOnly) succeeds, you need to set was_open to true. I am not very familiar with Qt, so take my word with a grain of salt.

[martinrotter]

Will refactor these methods with openssl.