use argon2::{
    password_hash::{rand_core::OsRng, PasswordHash, PasswordHasher, PasswordVerifier, SaltString},
    Argon2,
};
use std::time::SystemTime;

fn main() {
    let password = b"hunter42"; // Bad password; don't actually use!
    let start = SystemTime::now();
    let salt: SaltString = SaltString::generate(&mut OsRng);
    println!("salt: {}", salt);
    // Argon2 with default params (Argon2id v19)
    let argon2 = Argon2::default();

    // Hash password to PHC string ($argon2id$v=19$...)
    let password_hash = argon2.hash_password(password, &salt).unwrap().to_string();
    println!("password_hash: {}", password_hash);
    println!("Elapsed time: {:?}", start.elapsed());
    // Verify password against PHC string.
    //
    // NOTE: hash params from `parsed_hash` are used instead of what is configured in the
    // `Argon2` instance.
    let parsed_hash = PasswordHash::new(&password_hash).unwrap();
    assert!(Argon2::default()
        .verify_password(password, &parsed_hash)
        .is_ok());
    println!("Elapsed time: {:?}", start.elapsed());
}