Now decryption is also supported. Plaintext and Key values are hardcoded, so you'll get a ciphertext for "HELLO WORLD" with the key "KEY" (both without quotation marks) and then the decryption function will decrypt the resulting ciphertext. To change them, clone this repo and change the corresponding values in main.rs.
Binary provided here is for amd64 Linux systems. To create an .exe executable, clone this repo and compile one for yourself.