ddlcpad in rust

ddlcpad.rs

use std::fs::File;
use std::io::prelude::*;

fn main() {
    let mut f = File::open("foo.cy").unwrap();
    let mut buffer = Vec::new();

    // read the whole file
    f.read_to_end(&mut buffer).unwrap();

    // xor the buffer with a key
    for i in 0..buffer.len() {
        buffer[i] ^= 40;
    }

    // write the xor-ed buffer to a new file
    let mut f = File::create("bar.cy.out").unwrap();
    f.write_all(&buffer).unwrap();
}