dat 1.1.3

DAT - Data Access Token
Documentation 
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use dat::crypto_algorithm::CryptoAlgorithm;
use dat::crypto_algorithm::CryptoAlgorithm::{AES128GCMN, AES256GCMN};
use dat::crypto_key::CryptoKey;
use dat::error::DatError;
use dat::util::{decode_base64_url_no_pad, encode_base64_url_no_pad};
use rand::RngExt;

fn rand_string() -> String {
    let mut rng = rand::rng();
    (0..100).map(|_| { rng.sample(rand::distr::Alphanumeric) as char }).collect()
}
fn encrypt_and_decrypt(alg: CryptoAlgorithm, rand_string: String) -> Result<(), DatError> {
    let tag = format!("crypto.{}", alg);
    println!("{tag} ready");
    let key = CryptoKey::generate(alg);
    let byte_key = key.to_bytes();
    let b64_key = encode_base64_url_no_pad(&byte_key);
    println!("{tag} key {}", &b64_key);
    let parse_key = CryptoKey::from_bytes(alg, &*decode_base64_url_no_pad(b64_key)?)?;
    let rand_bytes = rand_string.as_bytes();
    println!("{tag} rand_string {}", rand_string);
    let encrypt = encode_base64_url_no_pad(key.encrypt(rand_bytes)?);
    let decrypt = parse_key.decrypt(&*decode_base64_url_no_pad(encrypt.clone())?)?;
    let pass_decrypt = rand_bytes == decrypt;
    assert!(pass_decrypt);
    let fail_decrypt = CryptoKey::generate(alg).decrypt(&*decode_base64_url_no_pad(encrypt)?).is_ok();
    assert!(!fail_decrypt || rand_string.is_empty());
    println!("{tag} pass {} / fail {}", pass_decrypt, fail_decrypt);
    Ok(())
}

#[test]
fn test() {
    let alg_arr = [AES128GCMN, AES256GCMN];
    alg_arr.iter().for_each(|alg| {
        // random
        (1..20).for_each(|_| {
            assert!(encrypt_and_decrypt(*alg, rand_string()).is_ok())
        });
        // empty
        assert!(encrypt_and_decrypt(*alg, "".to_string()).is_ok())
    })
}