dat 4.7.0

DAT - Distributed Access Token
Documentation 
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use dat::certificate::DatCertificate;
use dat::crypto::DatCryptoAlgorithm;
use dat::crypto::DatCryptoAlgorithm::IvAes128Gcm;
use dat::error::DatError;
use dat::manager::DatManager;
use dat::signature::DatSignatureAlgorithm;
use dat::signature::DatSignatureAlgorithm::EcdsaP256;
use dat::util::now_unix_timestamp;
use rand::RngExt;

fn rand_string() -> String {
    let mut rng = rand::rng();
    (0..100)
        .map(|_| rng.sample(rand::distr::Alphanumeric) as char)
        .collect()
}

fn unit(
    fail_certificate: &DatCertificate,
    cid: u64,
    signature_algorithm: DatSignatureAlgorithm,
    crypto_algorithm: DatCryptoAlgorithm,
    plain: String,
    secure: String,
) -> Result<(), DatError> {
    let tag = format!("dat.{}.{}.{:x}", signature_algorithm, crypto_algorithm, cid);

    let new_certificate = DatCertificate::generate(
        cid,
        now_unix_timestamp() - 10,
        200,
        100,
        signature_algorithm,
        crypto_algorithm,
    )?;
    let new_certificate_str = new_certificate.export(false)?;

    let read_certificate: DatCertificate = new_certificate_str.parse()?;

    let dat = DatManager::_issue(&new_certificate, &plain, &secure)?;
    println!("{tag}: {}", dat);

    let payload = DatManager::_parse(&read_certificate, dat.clone().try_into()?)?;
    assert_eq!(plain, payload.plain_text()?);
    assert_eq!(secure, payload.secure_text()?);
    assert!(DatManager::_parse(&fail_certificate, dat.try_into()?).is_err());
    Ok(())
}

#[test]
fn test() {
    let signature_alg_arr = DatSignatureAlgorithm::list();
    let crypto_alg_arr = DatCryptoAlgorithm::list();

    let fail_certificate = &DatCertificate::generate(
        192874,
        now_unix_timestamp() - 10,
        200,
        100,
        EcdsaP256,
        IvAes128Gcm,
    )
    .unwrap();

    signature_alg_arr.iter().for_each(|sign_alg| {
        crypto_alg_arr.iter().for_each(|crypto_alg| {
            (1..20).for_each(|i| {
                let plain = rand_string();
                let secure = rand_string();
                assert!(
                    unit(fail_certificate, i, *sign_alg, *crypto_alg, plain, secure)
                        .map_err(|e| {
                            println!("@{:?}", e);
                            e
                        })
                        .is_ok()
                )
            });
            assert!(
                unit(
                    fail_certificate,
                    0,
                    *sign_alg,
                    *crypto_alg,
                    "".to_string(),
                    "".to_string()
                )
                .is_ok()
            )
        });
    });
}