feat: oidc issuer

demo-server/src/main.rs

@@ -1,8 +1,5 @@
-use axum::{
-    routing::{get, post},
-    Router,
-};
-use jwt_authorizer::{AuthError, JwtAuthorizer, JwtClaims, Refresh, RefreshStrategy};
+use axum::{routing::get, Router};
+use jwt_authorizer::{error::InitError, AuthError, JwtAuthorizer, JwtClaims, Refresh, RefreshStrategy};
 use serde::Deserialize;
 use std::{fmt::Display, net::SocketAddr};
 use tower_http::trace::TraceLayer;
@@ -12,7 +9,7 @@ use tracing_subscriber::{layer::SubscriberExt, util::SubscriberInitExt};
 mod oidc_provider;
 
 #[tokio::main]
-async fn main() {
+async fn main() -> Result<(), InitError> {
     tracing_subscriber::registry()
         .with(tracing_subscriber::EnvFilter::new(
             std::env::var("RUST_LOG").unwrap_or_else(|_| "info,axum_poc=debug,tower_http=debug".into()),
@@ -26,9 +23,13 @@ async fn main() {
         u.sub.contains('@') // must be an email
     }
 
+    // starting oidc provider (discovery is needed by from_oidc())
+    oidc_provider::run_server();
+
     // First let's create an authorizer builder from a JWKS Endpoint
     // User is a struct deserializable from JWT claims representing the authorized user
-    let jwt_auth: JwtAuthorizer<User> = JwtAuthorizer::from_jwks_url("http://localhost:3000/oidc/jwks")
+    // let jwt_auth: JwtAuthorizer<User> = JwtAuthorizer::from_oidc("https://accounts.google.com/")
+    let jwt_auth: JwtAuthorizer<User> = JwtAuthorizer::from_oidc("http://localhost:3001")
         // .no_refresh()
         .refresh(Refresh {
             strategy: RefreshStrategy::Interval,
@@ -36,18 +37,15 @@ async fn main() {
         })
         .check(claim_checker);
 
-    let oidc = Router::new()
-        .route("/authorize", post(oidc_provider::authorize))
-        .route("/jwks", get(oidc_provider::jwks))
-        .route("/tokens", get(oidc_provider::tokens));
-
+    // actual router demo
     let api = Router::new()
         .route("/protected", get(protected))
-        .layer(jwt_auth.layer().unwrap());
+        // adding the authorizer layer
+        .layer(jwt_auth.layer().await?);
     // .layer(jwt_auth.check_claims(|_: User| true));
 
     let app = Router::new()
-        .nest("/oidc/", oidc)
+        // actual protected apis
         .nest("/api", api)
         .layer(TraceLayer::new_for_http());
 
@@ -55,6 +53,8 @@ async fn main() {
     tracing::info!("listening on {}", addr);
 
     axum::Server::bind(&addr).serve(app.into_make_service()).await.unwrap();
+
+    Ok(())
 }
 
 async fn protected(JwtClaims(user): JwtClaims<User>) -> Result<String, AuthError> {

demo-server/src/oidc_provider/mod.rs

@@ -4,7 +4,8 @@ use axum::{
     headers::{authorization::Bearer, Authorization},
     http::{request::Parts, StatusCode},
     response::{IntoResponse, Response},
-    Json,
+    routing::{get, post},
+    Json, Router,
 };
 use josekit::jwk::{
     alg::{ec::EcCurve, ec::EcKeyPair, ed::EdKeyPair, rsa::RsaKeyPair},
@@ -14,7 +15,7 @@ use jsonwebtoken::{decode, encode, Algorithm, DecodingKey, EncodingKey, Header,
 use once_cell::sync::Lazy;
 use serde::{Deserialize, Serialize};
 use serde_json::{json, Value};
-use std::fmt::Display;
+use std::{fmt::Display, net::SocketAddr, thread, time::Duration};
 
 pub static KEYS: Lazy<Keys> = Lazy::new(|| {
     //let secret = std::env::var("JWT_SECRET").expect("JWT_SECRET must be set");
@@ -22,6 +23,8 @@ pub static KEYS: Lazy<Keys> = Lazy::new(|| {
     Keys::load_rsa()
 });
 
+const ISSUER_URI: &str = "http://localhost:3001";
+
 pub struct Keys {
     pub alg: Algorithm,
     pub encoding: EncodingKey,
@@ -38,6 +41,23 @@ impl Keys {
     }
 }
 
+/// OpenId Connect discovery (simplified for test purposes)
+#[derive(Serialize, Clone)]
+pub struct OidcDiscovery {
+    issuer: String,
+    jwks_uri: String,
+    authorization_endpoint: String,
+}
+
+pub async fn discovery() -> Json<Value> {
+    let d = OidcDiscovery {
+        issuer: ISSUER_URI.to_owned(),
+        jwks_uri: format!("{}/jwks", ISSUER_URI),
+        authorization_endpoint: format!("{}/authorize", ISSUER_URI),
+    };
+    Json(json!(d))
+}
+
 #[derive(Debug, Eq, PartialEq, Clone, Deserialize, Serialize)]
 struct JwkSet {
     keys: Vec<Jwk>,
@@ -108,6 +128,7 @@ fn build_header(alg: Algorithm, kid: &str) -> Header {
     }
 }
 
+/// issues test tokens (this is not a standard endpoint)
 pub async fn tokens() -> Json<Value> {
     let claims = Claims {
         sub: "b@b.com".to_owned(),
@@ -150,6 +171,24 @@ pub async fn authorize(Json(payload): Json<AuthPayload>) -> Result<Json<AuthBody
     Ok(Json(AuthBody::new(token)))
 }
 
+/// exposes oidc "like" endpoints (this is for test purposes)
+pub fn run_server() {
+    // oidc "like" endpoints for test purposes
+    let app = Router::new()
+        .route("/.well-known/openid-configuration", get(discovery))
+        .route("/authorize", post(authorize))
+        .route("/jwks", get(jwks))
+        .route("/tokens", get(tokens));
+
+    tokio::spawn(async move {
+        let addr = SocketAddr::from(([127, 0, 0, 1], 3001));
+        tracing::info!("oidc provider starting on: {}", addr);
+        axum::Server::bind(&addr).serve(app.into_make_service()).await.unwrap();
+    });
+
+    thread::sleep(Duration::from_millis(200)); // waiting oidc to start
+}
+
 #[derive(Debug, Serialize, Deserialize)]
 struct Claims {
     sub: String,