diig_run_05.go

type IReader interface {
    Read() ([]byte, error)
}

type IWriter interface {
    Write(dat []byte) error
}

func (e *Encryptor) Run(r IReader, w IWriter) error {
    // read file
    dat, err := r.Read()
    if err != nil {
        return nil
    }

    // encrypt
    result := e.encrypt(dat)

    // output encrypted content
    return w.Write(result)
}