main.rs

use hmac::{Hmac, Mac};
use jwt::{Header, Token, VerifyWithKey};
use sha2::Sha256;
use std::collections::BTreeMap;

const DATA: &str = "420";
const SECRET_KEY: &str = "verysecretkey";

fn main() {
    let secret_key = Hmac::<Sha256>::new_from_slice(SECRET_KEY.as_bytes()).unwrap();

    let token = "eyJ0eXAiOiJKV1QiLCJraWQiOm51bGwsImFsZyI6IkhTMjU2In0.eyJpc3MiOm51bGwsInN1YiI6IjQyMCIsImF1ZCI6bnVsbCwiZXhwIjpudWxsLCJuYmYiOm51bGwsImlhdCI6bnVsbCwianRpIjpudWxsfQ._sN8Ur-b-38g4X2yQsIuhs4Z1dWjPW-7SHSFgmYa4xM";

    println!("{}", token);

    match VerifyWithKey::<Token<Header, BTreeMap<String, Option<String>>, _>>::verify_with_key(
        token,
        &secret_key,
    ) {
        Ok(token) => {
            assert_eq!(Some(DATA.to_string()), token.claims()["sub"]);
        }
        Err(e) => {
            panic!("Token is not valid: {}", e)
        }
    }
}