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|
use tokio;
use tokio::sync::Mutex;
use std::{
sync::Arc,
ops::DerefMut,
time::SystemTime,
fs,
process,
};
use sqlx::{
ConnectOptions,
SqliteConnection,
Row,
};
use sqlx::sqlite::{
SqliteConnectOptions,
SqliteJournalMode,
};
use rand::RngCore;
use argon2::password_hash::rand_core::OsRng;
use crate::constants::*;
use crate::util::base64_encode;
async fn initialise_schema(conn: &mut SqliteConnection) {
match sqlx::query(&fs::read_to_string("schema.sql").unwrap()).execute(conn).await {
Ok(_) => {},
Err(err) => {
eprintln!("Error: Could not initialise database schema: {err}");
process::exit(1);
},
}
}
pub async fn open() -> SqliteConnection {
let opts = SqliteConnectOptions::new()
.filename(DB_FILE_NAME)
.create_if_missing(true)
.journal_mode(SqliteJournalMode::Wal)
.pragma("foreign_keys", "on");
let mut conn = match opts.connect().await {
Ok(conn) => conn,
Err(err) => {
eprintln!("Error: Could not open database file '{DB_FILE_NAME}': {err}");
process::exit(1);
}
};
match sqlx::query("select version from meta").fetch_one(&mut conn).await {
Ok(row) => {
let ver: i64 = row.get(0);
if ver == DB_SCHEMA_VERSION {
conn
} else {
eprintln!("Error: Database schema version {ver} but application schema version {DB_SCHEMA_VERSION}");
process::exit(1);
}
},
Err(err) => {
eprintln!("Error: Failed querying database meta version: {err}");
eprintln!("Initialising schema.");
initialise_schema(&mut conn).await;
conn
},
}
}
pub type DB = Arc<Mutex<SqliteConnection>>;
pub async fn register_account(db: DB, username: &str, passhash: &str) -> Result<(), String> {
let mut conn = db.lock().await;
match sqlx::query("insert into Users (username, passhash) values ($1, $2)")
.bind(username)
.bind(passhash)
.execute(conn.deref_mut())
.await {
Ok(_) => Ok(()),
Err(_) => Err("User already exists".to_string()),
}
}
pub async fn get_passhash(db: DB, username: &str) -> Result<String, ()> {
let mut conn = db.lock().await;
match sqlx::query("select passhash from Users where username = $1")
.bind(username)
.fetch_optional(conn.deref_mut())
.await {
Ok(Some(row)) => Ok(row.get(0)),
Ok(None) => Err(()),
Err(err) => {
eprintln!("db_get_passhash: sqlx error: {err}");
Err(())
}
}
}
fn generate_login_token() -> String {
let mut bytes = [0u8; 30];
OsRng.fill_bytes(&mut bytes);
base64_encode(&bytes)
}
fn current_time() -> i64 {
SystemTime::now().duration_since(SystemTime::UNIX_EPOCH).unwrap().as_secs() as i64
}
pub async fn create_login_token(db: DB, username: &str) -> Result<String, ()> {
let mut conn = db.lock().await;
let now = current_time();
let token = generate_login_token();
match sqlx::query("insert into Logins (user, token, expire) values ($1, $2, $3)")
.bind(username)
.bind(&token)
.bind(now + LOGIN_TOKEN_EXPIRE_SECS)
.execute(conn.deref_mut()).await {
Ok(_) => Ok(token),
Err(_) => Err(()),
}
}
pub async fn drop_token(db: DB, token: &str) {
let mut conn = db.lock().await;
// ignore errors
let _ = sqlx::query("delete from Logins where token = $1")
.bind(token)
.execute(conn.deref_mut()).await;
}
async fn set_token_expire(conn: &mut SqliteConnection, token: &str, expire: i64) -> Result<(), String> {
match sqlx::query("update Logins set expire = $1 where token = $2")
.bind(expire)
.bind(token)
.execute(conn).await {
Ok(_) => Ok(()),
Err(err) => {
eprintln!("set_token_expire: err = {err}");
Err("Server error".to_string())
}
}
}
pub async fn maybe_refresh_token(db: DB, token: &str) -> Result<(), String> {
let mut conn = db.lock().await;
let now = current_time();
match sqlx::query("select expire from Logins where token = $1")
.bind(token)
.fetch_optional(conn.deref_mut()).await {
Ok(Some(row)) => {
if now >= row.get::<i64, _>(0) - LOGIN_TOKEN_REFRESH_MARGIN {
set_token_expire(conn.deref_mut(), token, now + LOGIN_TOKEN_EXPIRE_SECS).await
} else {
Ok(())
}
},
Ok(None) => {
Err("Not logged in".to_string())
},
Err(err) => {
eprintln!("maybe_refresh_token: err = {err}");
Err("Server error".to_string())
}
}
}
|
