Moved auth code to gateway

src/auth/jwt.rs

@@ -0,0 +1,118 @@
+use chrono::Utc;
+use diesel::PgConnection;
+use hmac::{Hmac, NewMac};
+use jwt::SignWithKey;
+use rand::{thread_rng, Rng};
+use serde::{Deserialize, Serialize};
+use sha2::Sha256;
+
+use crate::{
+    db,
+    errors::{RbError, RbResult},
+    RbJwtConf,
+};
+
+#[derive(Serialize)]
+#[serde(rename_all = "camelCase")]
+pub struct JWTResponse
+{
+    token: String,
+    refresh_token: String,
+}
+
+#[derive(Serialize, Deserialize)]
+pub struct Claims
+{
+    pub id: uuid::Uuid,
+    pub username: String,
+    pub admin: bool,
+    pub exp: i64,
+}
+
+pub fn generate_jwt_token(
+    conn: &PgConnection,
+    jwt: &RbJwtConf,
+    user: &db::User,
+) -> RbResult<JWTResponse>
+{
+    let key: Hmac<Sha256> = Hmac::new_from_slice(jwt.key.as_bytes())
+        .map_err(|_| RbError::Custom("Couldn't create Hmac key."))?;
+
+    let current_time = Utc::now();
+
+    // Create the claims
+    let claims = Claims {
+        id: user.id,
+        username: user.username.clone(),
+        admin: user.admin,
+        exp: current_time.timestamp() + jwt.refresh_token_expire,
+    };
+
+    // Sign the claims into a new token
+    let token = claims
+        .sign_with_key(&key)
+        .map_err(|_| RbError::Custom("Couldn't sign JWT."))?;
+
+    // Generate a random refresh token
+    let mut refresh_token = vec![0u8; jwt.refresh_token_size];
+    thread_rng().fill(&mut refresh_token[..]);
+
+    let refresh_expire =
+        (current_time + chrono::Duration::seconds(jwt.refresh_token_expire)).naive_utc();
+
+    // Store refresh token in database
+    db::tokens::create(
+        conn,
+        &db::NewRefreshToken {
+            token: refresh_token.to_vec(),
+            user_id: user.id,
+            expires_at: refresh_expire,
+        },
+    )?;
+
+    Ok(JWTResponse {
+        token,
+        refresh_token: base64::encode(refresh_token),
+    })
+}
+
+pub fn refresh_token(
+    conn: &PgConnection,
+    jwt: &RbJwtConf,
+    refresh_token: &str,
+) -> RbResult<JWTResponse>
+{
+    let token_bytes =
+        base64::decode(refresh_token).map_err(|_| RbError::AuthInvalidRefreshToken)?;
+
+    // First, we request the token from the database to see if it's really a valid token
+    let (token_entry, user) =
+        db::tokens::find_with_user(conn, &token_bytes).ok_or(RbError::AuthInvalidRefreshToken)?;
+
+    // If we see that the token has already been used before, we block the user.
+    if token_entry.last_used_at.is_some() {
+        // If we fail to block the user, the end user must know
+        if let Err(err) = db::users::block(conn, token_entry.user_id) {
+            return Err(err);
+        }
+
+        return Err(RbError::AuthDuplicateRefreshToken);
+    }
+
+    // Then we check if the user is blocked
+    if user.blocked {
+        return Err(RbError::AuthBlockedUser);
+    }
+
+    // Now we check if the token has already expired
+    let cur_time = Utc::now().naive_utc();
+
+    if token_entry.expires_at < cur_time {
+        return Err(RbError::AuthTokenExpired);
+    }
+
+    // We update the last_used_at value for the refresh token
+    db::tokens::update_last_used_at(conn, &token_entry.token, cur_time)?;
+
+    generate_jwt_token(conn, jwt, &user)
+}

src/auth/mod.rs

@@ -0,0 +1,68 @@
+use rocket::{serde::json::Json, State};
+use serde::Deserialize;
+
+use self::{
+    jwt::{generate_jwt_token, JWTResponse},
+    pass::verify_user,
+};
+use crate::{errors::RbResult, guards::User, RbConfig, RbDbConn};
+
+pub mod jwt;
+pub mod pass;
+
+#[derive(Deserialize)]
+pub struct Credentials
+{
+    username: String,
+    password: String,
+}
+
+#[post("/login")]
+pub async fn already_logged_in(_user: User) -> String
+{
+    String::from("You're already logged in!")
+}
+
+#[post("/login", data = "<credentials>", rank = 2)]
+pub async fn login(
+    conn: RbDbConn,
+    conf: &State<RbConfig>,
+    credentials: Json<Credentials>,
+) -> RbResult<Json<JWTResponse>>
+{
+    let credentials = credentials.into_inner();
+    let jwt = conf.jwt.clone();
+
+    // Get the user, if credentials are valid
+    let user = conn
+        .run(move |c| verify_user(c, &credentials.username, &credentials.password))
+        .await?;
+
+    Ok(Json(
+        conn.run(move |c| generate_jwt_token(c, &jwt, &user))
+            .await?,
+    ))
+}
+
+#[derive(Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct RefreshTokenRequest
+{
+    pub refresh_token: String,
+}
+
+#[post("/refresh", data = "<refresh_token_request>")]
+pub async fn refresh_token(
+    conn: RbDbConn,
+    conf: &State<RbConfig>,
+    refresh_token_request: Json<RefreshTokenRequest>,
+) -> RbResult<Json<JWTResponse>>
+{
+    let refresh_token = refresh_token_request.into_inner().refresh_token;
+    let jwt = conf.jwt.clone();
+
+    Ok(Json(
+        conn.run(move |c| crate::auth::jwt::refresh_token(c, &jwt, &refresh_token))
+            .await?,
+    ))
+}

src/auth/pass.rs

@@ -0,0 +1,36 @@
+use argon2::verify_encoded;
+use diesel::PgConnection;
+use rand::{thread_rng, Rng};
+
+use crate::{
+    db,
+    errors::{RbError, RbResult},
+};
+
+pub fn verify_user(conn: &PgConnection, username: &str, password: &str) -> RbResult<db::User>
+{
+    // TODO handle non-"NotFound" Diesel errors accordingely
+    let user = db::users::find_by_username(conn, username).map_err(|_| RbError::AuthUnknownUser)?;
+
+    // Check if a user is blocked
+    if user.blocked {
+        return Err(RbError::AuthBlockedUser);
+    }
+
+    match verify_encoded(user.password.as_str(), password.as_bytes()) {
+        Ok(true) => Ok(user),
+        _ => Err(RbError::AuthInvalidPassword),
+    }
+}
+
+pub fn hash_password(password: &str) -> RbResult<String>
+{
+    // Generate a random salt
+    let mut salt = [0u8; 64];
+    thread_rng().fill(&mut salt[..]);
+
+    // Encode the actual password
+    let config = argon2::Config::default();
+    argon2::hash_encoded(password.as_bytes(), &salt, &config)
+        .map_err(|_| RbError::Custom("Couldn't hash password."))
+}

src/main.rs

@@ -0,0 +1,101 @@
+#[macro_use]
+extern crate rocket;
+#[macro_use]
+extern crate diesel_migrations;
+#[macro_use]
+extern crate diesel;
+
+use figment::{
+    providers::{Env, Format, Yaml},
+    Figment,
+};
+use rocket::{
+    fairing::AdHoc,
+    http::Status,
+    serde::json::{json, Value},
+    Build, Orbit, Request, Rocket,
+};
+use rocket_sync_db_pools::database;
+use serde::{Deserialize, Serialize};
+
+pub mod auth;
+// pub mod db;
+// pub mod errors;
+// pub mod guards;
+pub(crate) mod schema;
+
+#[database("postgres_rb")]
+pub struct RbDbConn(diesel::PgConnection);
+
+#[catch(default)]
+fn default_catcher(status: Status, _: &Request) -> Value
+{
+    json!({"status": status.code, "message": ""})
+}
+
+embed_migrations!();
+
+async fn run_db_migrations(rocket: Rocket<Build>) -> Result<Rocket<Build>, Rocket<Build>>
+{
+    let conn = RbDbConn::get_one(&rocket)
+        .await
+        .expect("database connection");
+    conn.run(|c| match embedded_migrations::run(c) {
+        Ok(()) => Ok(rocket),
+        Err(_) => Err(rocket),
+    })
+    .await
+}
+
+async fn create_admin_user<'a>(rocket: &'a Rocket<Orbit>)
+{
+    let config = rocket.state::<RbConfig>().expect("RbConfig instance");
+    let admin_user = config.admin_user.clone();
+    let admin_pass = config.admin_pass.clone();
+
+    let conn = RbDbConn::get_one(&rocket)
+        .await
+        .expect("database connection");
+    conn.run(move |c| {
+        admin::create_admin_user(c, &admin_user, &admin_pass).expect("failed to create admin user")
+    })
+    .await;
+}
+
+#[derive(Debug, Deserialize, Serialize, Clone)]
+pub struct RbJwtConf
+{
+    key: String,
+    refresh_token_size: usize,
+    refresh_token_expire: i64,
+}
+
+#[derive(Debug, Deserialize, Serialize)]
+pub struct RbConfig
+{
+    admin_user: String,
+    admin_pass: String,
+    jwt: RbJwtConf,
+}
+
+#[launch]
+fn rocket() -> _
+{
+    let figment = Figment::from(rocket::config::Config::default())
+        .merge(Yaml::file("Rb.yaml").nested())
+        .merge(Env::prefixed("RB_").global());
+
+    rocket::custom(figment)
+        .attach(RbDbConn::fairing())
+        .attach(AdHoc::try_on_ignite(
+            "Run database migrations",
+            run_db_migrations,
+        ))
+        // .attach(AdHoc::try_on_ignite("Create admin user", create_admin_user))
+        .attach(AdHoc::config::<RbConfig>())
+        .register("/", catchers![default_catcher])
+        .mount(
+            "/api/auth",
+            routes![auth::already_logged_in, auth::login, auth::refresh_token,],
+        )
+}

src/schema.rs

@@ -0,0 +1,49 @@
+table! {
+    posts (id) {
+        id -> Uuid,
+        section_id -> Uuid,
+        title -> Nullable<Varchar>,
+        publish_date -> Date,
+        content -> Text,
+    }
+}
+
+table! {
+    refresh_tokens (token) {
+        token -> Bytea,
+        user_id -> Uuid,
+        expires_at -> Timestamp,
+        last_used_at -> Nullable<Timestamp>,
+    }
+}
+
+table! {
+    sections (id) {
+        id -> Uuid,
+        title -> Varchar,
+        shortname -> Varchar,
+        description -> Nullable<Text>,
+        is_default -> Bool,
+        has_titles -> Bool,
+    }
+}
+
+table! {
+    users (id) {
+        id -> Uuid,
+        username -> Varchar,
+        password -> Text,
+        blocked -> Bool,
+        admin -> Bool,
+    }
+}
+
+joinable!(posts -> sections (section_id));
+joinable!(refresh_tokens -> users (user_id));
+
+allow_tables_to_appear_in_same_query!(
+    posts,
+    refresh_tokens,
+    sections,
+    users,
+);