embedded-trainings-2020/boards/dongle/puzzlegen.rs

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2020-12-09 17:20:02 +00:00
// add this to Cargo.toml
// ``` toml
// [dependencies]
// rand = "0.7.3"
// ```
use std::{collections::HashMap, ops::Range, str};
use rand::prelude::SliceRandom as _;
fn main() {
const PRINTABLE_ASCII: Range<u8> = 32..127;
// TODO change this
let plaintext = b"example text";
let mut rng = rand::thread_rng();
let mut from = PRINTABLE_ASCII.collect::<Vec<_>>();
from.shuffle(&mut rng);
let mut to = PRINTABLE_ASCII.collect::<Vec<_>>();
to.shuffle(&mut rng);
let mut dict = HashMap::new();
for (&from, &to) in from.iter().zip(to.iter()) {
dict.insert(from, to);
}
let secret = plaintext.iter().map(|byte| dict[byte]).collect::<Vec<_>>();
println!("from: {:?}", from);
println!("to: {:?}", to);
println!("plaintext: {}", str::from_utf8(plaintext).expect("was not ASCII"));
println!(
"secret: {:?}",
str::from_utf8(&secret).expect("was not ASCII")
);
}