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use argon2::Argon2;
use password_hash::{PasswordHash, PasswordHasher, PasswordVerifier, SaltString};
use rand_core::OsRng;
use sqlx::sqlite::SqlitePool;
use super::repo::{
logins::{Login, Provider as _},
tokens::Provider as _,
};
use crate::error::BoxedError;
type DateTime = chrono::DateTime<chrono::Utc>;
pub struct Logins<'a> {
db: &'a SqlitePool,
}
impl<'a> Logins<'a> {
pub fn new(db: &'a SqlitePool) -> Self {
Self { db }
}
pub async fn login(
&self,
name: &str,
password: &str,
login_at: DateTime,
) -> Result<Option<String>, BoxedError> {
let mut tx = self.db.begin().await?;
let login = if let Some((login, stored_hash)) = tx.logins().for_login(name).await? {
if stored_hash.verify(password)? {
// Password verified; use the login.
Some(login)
} else {
// Password NOT verified.
None
}
} else {
let password_hash = StoredHash::new(password)?;
Some(tx.logins().create(name, &password_hash).await?)
};
// If `login` is Some, then we have an identity and can issue a token.
// If `login` is None, then neither creating a new login nor
// authenticating an existing one succeeded, and we must reject the
// login attempt.
let token = if let Some(login) = login {
Some(tx.tokens().issue(&login.id, login_at).await?)
} else {
None
};
tx.commit().await?;
Ok(token)
}
pub async fn validate(
&self,
secret: &str,
used_at: DateTime,
) -> Result<Option<Login>, BoxedError> {
let mut tx = self.db.begin().await?;
tx.tokens().expire(used_at).await?;
let login = tx.tokens().validate(secret, used_at).await?;
tx.commit().await?;
Ok(login)
}
pub async fn logout(&self, secret: &str) -> Result<(), BoxedError> {
let mut tx = self.db.begin().await?;
tx.tokens().revoke(secret).await?;
tx.commit().await?;
Ok(())
}
}
#[derive(Debug, sqlx::Type)]
#[sqlx(transparent)]
pub struct StoredHash(String);
impl StoredHash {
fn new(password: &str) -> Result<Self, password_hash::Error> {
let salt = SaltString::generate(&mut OsRng);
let argon2 = Argon2::default();
let hash = argon2
.hash_password(password.as_bytes(), &salt)?
.to_string();
Ok(Self(hash))
}
fn verify(&self, password: &str) -> Result<bool, password_hash::Error> {
let hash = PasswordHash::new(&self.0)?;
match Argon2::default().verify_password(password.as_bytes(), &hash) {
// Successful authentication, not an error
Ok(()) => Ok(true),
// Unsuccessful authentication, also not an error
Err(password_hash::errors::Error::Password) => Ok(false),
// Password validation failed for some other reason, treat as an error
Err(err) => Err(err),
}
}
}
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