backend: gate existing endpoints behind auth and app permissions

Move /api/pair, /api/apps, and /api/stream/start under the session
auth middleware so they require a valid session token. Add app-level
permission filtering: non-admin users only see and can stream apps
they have been explicitly granted access to. Admins bypass all
permission checks.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Cargo.lock

@@ -93,6 +93,18 @@ version = "1.0.98"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e16d2d3311acee920a9eb8d33b8cbc1787ce4a264e85f964c2404b969bdcd487"
 
+[[package]]
+name = "argon2"
+version = "0.5.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3c3610892ee6e0cbce8ae2700349fcf8f98adb0dbfbee85aec3c9179d29cc072"
+dependencies = [
+ "base64ct",
+ "blake2",
+ "cpufeatures",
+ "password-hash",
+]
+
 [[package]]
 name = "arrayvec"
 version = "0.7.6"
@@ -143,6 +155,12 @@ version = "0.22.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "72b3254f16251a8381aa12e40e3c4d2f0199f8c6508fbecb9d91f575e0fbb8c6"
 
+[[package]]
+name = "base64ct"
+version = "1.8.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2af50177e190e07a26ab74f8b1efbfe2ef87da2116221318cb1c2e82baf7de06"
+
 [[package]]
 name = "bindgen"
 version = "0.72.0"
@@ -181,6 +199,15 @@ dependencies = [
  "wyz",
 ]
 
+[[package]]
+name = "blake2"
+version = "0.10.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "46502ad458c9a52b69d4d4d32775c788b7a1b85e8bc9d482d92250fc0e3f8efe"
+dependencies = [
+ "digest",
+]
+
 [[package]]
 name = "block-buffer"
 version = "0.10.4"
@@ -531,6 +558,18 @@ dependencies = [
  "xxhash-rust",
 ]
 
+[[package]]
+name = "fallible-iterator"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2acce4a10f12dc2fb14a218589d4f1f62ef011b2d0cc4b3cb1bba8e94da14649"
+
+[[package]]
+name = "fallible-streaming-iterator"
+version = "0.1.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7360491ce676a36bf9bb3c56c1aa791658183a54d2744120f27285738d90465a"
+
 [[package]]
 name = "fastrand"
 version = "2.3.0"
@@ -553,6 +592,12 @@ version = "1.0.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3f9eec918d3f24069decb9af1554cad7c880e2da24a9afd88aca000531ab82c1"
 
+[[package]]
+name = "foldhash"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d9c4f5dac5e15c24eb999c26181a6ca40b39fe946cbe4c263c7209467bc83af2"
+
 [[package]]
 name = "foreign-types"
 version = "0.3.2"
@@ -677,6 +722,7 @@ name = "gamestream-webtransport-proxy"
 version = "0.1.0"
 dependencies = [
  "anyhow",
+ "argon2",
  "directories",
  "flatbuffers",
  "getrandom 0.3.3",
@@ -690,6 +736,7 @@ dependencies = [
  "openssl",
  "rand 0.9.1",
  "reqwest",
+ "rusqlite",
  "salvo",
  "serde",
  "serde-xml-rs",
@@ -834,6 +881,18 @@ name = "hashbrown"
 version = "0.15.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5971ac85611da7067dbfcabef3c70ebb5606018acd9e2a3903a0da507521e0d5"
+dependencies = [
+ "foldhash",
+]
+
+[[package]]
+name = "hashlink"
+version = "0.10.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7382cf6263419f2d8df38c55d7da83da5c18aef87fc7a7fc1fb1e344edfe14c1"
+dependencies = [
+ "hashbrown 0.15.4",
+]
 
 [[package]]
 name = "headers"
@@ -1256,6 +1315,17 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "libsqlite3-sys"
+version = "0.32.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fbb8270bb4060bd76c6e96f20c52d80620f1d82a3470885694e41e0f81ef6fe7"
+dependencies = [
+ "cc",
+ "pkg-config",
+ "vcpkg",
+]
+
 [[package]]
 name = "linux-raw-sys"
 version = "0.9.4"
@@ -1549,6 +1619,17 @@ dependencies = [
  "windows-targets 0.52.6",
 ]
 
+[[package]]
+name = "password-hash"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "346f04948ba92c43e8469c1ee6736c7563d71012b17d40745260fe106aac2166"
+dependencies = [
+ "base64ct",
+ "rand_core 0.6.4",
+ "subtle",
+]
+
 [[package]]
 name = "path-slash"
 version = "0.2.1"
@@ -1989,6 +2070,20 @@ dependencies = [
  "syn 1.0.109",
 ]
 
+[[package]]
+name = "rusqlite"
+version = "0.34.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "37e34486da88d8e051c7c0e23c3f15fd806ea8546260aa2fec247e97242ec143"
+dependencies = [
+ "bitflags",
+ "fallible-iterator",
+ "fallible-streaming-iterator",
+ "hashlink",
+ "libsqlite3-sys",
+ "smallvec",
+]
+
 [[package]]
 name = "rust-embed"
 version = "8.6.0"

gamestream-webtransport-proxy/Cargo.toml

@@ -5,6 +5,7 @@ edition = "2024"
 
 [dependencies]
 anyhow = "1.0.98"
+argon2 = "0.5"
 directories = "6.0.0"
 flatbuffers = "25.2.10"
 getrandom = { version = "0.3.3", features = ["std"] }
@@ -17,6 +18,7 @@ libc = "0.2.174"
 moonlight-common-c-sys = { path = "../moonlight-common-c-sys" }
 openssl = "0.10.73"
 rand = "0.9.1"
+rusqlite = { version = "0.34", features = ["bundled"] }
 reqwest = { version = "0.12.20", features = [
   "rustls-tls",
   "native-tls",

gamestream-webtransport-proxy/src/apps.rs

@@ -5,6 +5,7 @@ use serde::{Deserialize, Serialize};
 use tracing::{debug, error};
 
 use crate::{
+    auth,
     common,
     common::{AppError, AppResult},
     responses,
@@ -45,7 +46,17 @@ struct GetAppsResponse {
 #[craft]
 impl crate::backend::Backend {
     #[craft(endpoint(status_codes(StatusCode::OK, StatusCode::INTERNAL_SERVER_ERROR)))]
-    pub async fn get_apps(self: ::std::sync::Arc<Self>) -> AppResult<Json<GetAppsResponse>> {
+    pub async fn get_apps(self: ::std::sync::Arc<Self>, depot: &mut Depot) -> AppResult<Json<GetAppsResponse>> {
+        let user = match auth::get_user_from_depot(depot) {
+            Some(u) => u.clone(),
+            None => {
+                error!("get_apps reached without authenticated user in depot");
+                return Err(AppError {
+                    status_code: StatusCode::UNAUTHORIZED,
+                    description: "Not authenticated".to_string(),
+                });
+            }
+        };
         let standard_error = Err(AppError {
             status_code: StatusCode::INTERNAL_SERVER_ERROR,
             description: "failed to get available apps".to_string(),
@@ -143,6 +154,19 @@ impl crate::backend::Backend {
             get_apps_resp.apps.insert(server.name, resp_vec);
         }
 
+        // Filter apps by user permissions (admins see everything)
+        if !user.is_admin {
+            let permissions = self.db.get_permissions(&user.id).unwrap_or_default();
+            for (server_name, apps) in get_apps_resp.apps.iter_mut() {
+                apps.retain(|app| {
+                    permissions.iter().any(|p| {
+                        p.server == *server_name && p.app_id == app.id as i64
+                    })
+                });
+            }
+            get_apps_resp.apps.retain(|_, apps| !apps.is_empty());
+        }
+
         Ok(Json(get_apps_resp))
     }
 }

gamestream-webtransport-proxy/src/auth.rs

@@ -0,0 +1,326 @@
+use std::sync::Arc;
+
+use salvo::prelude::*;
+use serde::{Deserialize, Serialize};
+use tracing::error;
+
+use crate::common::{AppError, AppResult};
+use crate::db::{AppPermission, Db, User};
+
+const SESSION_MAX_AGE_SECONDS: i64 = 7 * 24 * 3600; // 7 days
+
+// Key used to store the authenticated user in the Salvo Depot
+const USER_DEPOT_KEY: &str = "authenticated_user";
+
+pub fn get_user_from_depot(depot: &Depot) -> Option<&User> {
+    depot.get::<User>(USER_DEPOT_KEY).ok()
+}
+
+// -- Middleware --
+
+pub struct SessionAuthMiddleware {
+    pub db: Arc<Db>,
+}
+
+#[handler]
+impl SessionAuthMiddleware {
+    async fn handle(&self, req: &mut Request, depot: &mut Depot, res: &mut Response, ctrl: &mut FlowCtrl) {
+        let token = req
+            .headers()
+            .get("authorization")
+            .and_then(|v| v.to_str().ok())
+            .and_then(|v| v.strip_prefix("Bearer "));
+
+        let token = match token {
+            Some(t) => t,
+            None => {
+                res.status_code(StatusCode::UNAUTHORIZED);
+                Json(serde_json::json!({"description": "Missing or invalid Authorization header"})).render(res);
+                ctrl.skip_rest();
+                return;
+            }
+        };
+
+        match self.db.validate_session(token) {
+            Ok(Some(user)) => {
+                depot.insert(USER_DEPOT_KEY, user);
+            }
+            Ok(None) => {
+                res.status_code(StatusCode::UNAUTHORIZED);
+                Json(serde_json::json!({"description": "Invalid or expired session"})).render(res);
+                ctrl.skip_rest();
+                return;
+            }
+            Err(e) => {
+                error!("Session validation error: {e}");
+                res.status_code(StatusCode::INTERNAL_SERVER_ERROR);
+                Json(serde_json::json!({"description": "Internal server error"})).render(res);
+                ctrl.skip_rest();
+                return;
+            }
+        }
+    }
+}
+
+pub struct AdminCheckMiddleware;
+
+#[handler]
+impl AdminCheckMiddleware {
+    async fn handle(&self, _req: &mut Request, depot: &mut Depot, res: &mut Response, ctrl: &mut FlowCtrl) {
+        let user = match get_user_from_depot(depot) {
+            Some(u) => u,
+            None => {
+                res.status_code(StatusCode::UNAUTHORIZED);
+                Json(serde_json::json!({"description": "Not authenticated"})).render(res);
+                ctrl.skip_rest();
+                return;
+            }
+        };
+
+        if !user.is_admin {
+            res.status_code(StatusCode::FORBIDDEN);
+            Json(serde_json::json!({"description": "Admin access required"})).render(res);
+            ctrl.skip_rest();
+            return;
+        }
+    }
+}
+
+// -- Request/Response types --
+
+#[derive(Deserialize, ToSchema)]
+pub struct LoginRequest {
+    pub username: String,
+    pub password: String,
+}
+
+#[derive(Serialize, ToSchema)]
+pub struct LoginResponse {
+    pub token: String,
+}
+
+#[derive(Serialize, ToSchema)]
+pub struct MeResponse {
+    pub username: String,
+    pub is_admin: bool,
+    pub permissions: Vec<AppPermission>,
+}
+
+#[derive(Deserialize, ToSchema)]
+pub struct CreateUserRequest {
+    pub username: String,
+    pub password: String,
+    pub is_admin: bool,
+}
+
+#[derive(Deserialize, ToSchema)]
+pub struct UpdateUserRequest {
+    pub password: Option<String>,
+    pub is_admin: Option<bool>,
+}
+
+#[derive(Deserialize, ToSchema)]
+pub struct SetPermissionsRequest {
+    pub permissions: Vec<AppPermission>,
+}
+
+// -- Auth endpoint handlers --
+
+#[craft]
+impl crate::backend::Backend {
+    #[craft(handler)]
+    pub async fn login(
+        self: Arc<Self>,
+        body: salvo::oapi::extract::JsonBody<LoginRequest>,
+    ) -> AppResult<Json<LoginResponse>> {
+        let user = match self.db.verify_password(&body.username, &body.password) {
+            Ok(Some(u)) => u,
+            Ok(None) => {
+                return Err(AppError {
+                    status_code: StatusCode::UNAUTHORIZED,
+                    description: "Invalid username or password".to_string(),
+                });
+            }
+            Err(e) => {
+                error!("Login error: {e}");
+                return Err(AppError {
+                    status_code: StatusCode::INTERNAL_SERVER_ERROR,
+                    description: "Internal server error".to_string(),
+                });
+            }
+        };
+
+        let token = match self.db.create_session(&user.id, SESSION_MAX_AGE_SECONDS) {
+            Ok(t) => t,
+            Err(e) => {
+                error!("Session creation error: {e}");
+                return Err(AppError {
+                    status_code: StatusCode::INTERNAL_SERVER_ERROR,
+                    description: "Internal server error".to_string(),
+                });
+            }
+        };
+
+        Ok(Json(LoginResponse { token }))
+    }
+
+    #[craft(handler)]
+    pub async fn logout(self: Arc<Self>, req: &mut Request) -> AppResult<Json<serde_json::Value>> {
+        let token = req
+            .headers()
+            .get("authorization")
+            .and_then(|v| v.to_str().ok())
+            .and_then(|v| v.strip_prefix("Bearer "))
+            .unwrap_or("");
+
+        let _ = self.db.delete_session(token);
+
+        Ok(Json(serde_json::json!({"status": "ok"})))
+    }
+
+    #[craft(handler)]
+    pub async fn me(self: Arc<Self>, depot: &mut Depot) -> AppResult<Json<MeResponse>> {
+        let user = match get_user_from_depot(depot) {
+            Some(u) => u.clone(),
+            None => {
+                return Err(AppError {
+                    status_code: StatusCode::UNAUTHORIZED,
+                    description: "Not authenticated".to_string(),
+                });
+            }
+        };
+
+        let permissions = self.db.get_permissions(&user.id).unwrap_or_default();
+
+        Ok(Json(MeResponse {
+            username: user.username,
+            is_admin: user.is_admin,
+            permissions,
+        }))
+    }
+
+    // -- Admin endpoint handlers --
+
+    #[craft(handler)]
+    pub async fn admin_list_users(self: Arc<Self>) -> AppResult<Json<Vec<User>>> {
+        match self.db.list_users() {
+            Ok(users) => Ok(Json(users)),
+            Err(e) => {
+                error!("List users error: {e}");
+                Err(AppError {
+                    status_code: StatusCode::INTERNAL_SERVER_ERROR,
+                    description: "Failed to list users".to_string(),
+                })
+            }
+        }
+    }
+
+    #[craft(handler)]
+    pub async fn admin_create_user(
+        self: Arc<Self>,
+        body: salvo::oapi::extract::JsonBody<CreateUserRequest>,
+    ) -> AppResult<Json<User>> {
+        match self
+            .db
+            .create_user(&body.username, &body.password, body.is_admin)
+        {
+            Ok(user) => Ok(Json(user)),
+            Err(e) => {
+                error!("Create user error: {e}");
+                Err(AppError {
+                    status_code: StatusCode::BAD_REQUEST,
+                    description: format!("Failed to create user: {e}"),
+                })
+            }
+        }
+    }
+
+    #[craft(handler)]
+    pub async fn admin_update_user(
+        self: Arc<Self>,
+        req: &mut Request,
+        body: salvo::oapi::extract::JsonBody<UpdateUserRequest>,
+    ) -> AppResult<Json<serde_json::Value>> {
+        let user_id = req.param::<String>("id").unwrap_or_default();
+
+        match self
+            .db
+            .update_user(&user_id, body.password.as_deref(), body.is_admin)
+        {
+            Ok(true) => Ok(Json(serde_json::json!({"status": "ok"}))),
+            Ok(false) => Err(AppError {
+                status_code: StatusCode::NOT_FOUND,
+                description: "User not found".to_string(),
+            }),
+            Err(e) => {
+                error!("Update user error: {e}");
+                Err(AppError {
+                    status_code: StatusCode::INTERNAL_SERVER_ERROR,
+                    description: "Failed to update user".to_string(),
+                })
+            }
+        }
+    }
+
+    #[craft(handler)]
+    pub async fn admin_delete_user(
+        self: Arc<Self>,
+        req: &mut Request,
+    ) -> AppResult<Json<serde_json::Value>> {
+        let user_id = req.param::<String>("id").unwrap_or_default();
+
+        match self.db.delete_user(&user_id) {
+            Ok(true) => Ok(Json(serde_json::json!({"status": "ok"}))),
+            Ok(false) => Err(AppError {
+                status_code: StatusCode::NOT_FOUND,
+                description: "User not found".to_string(),
+            }),
+            Err(e) => {
+                error!("Delete user error: {e}");
+                Err(AppError {
+                    status_code: StatusCode::INTERNAL_SERVER_ERROR,
+                    description: "Failed to delete user".to_string(),
+                })
+            }
+        }
+    }
+
+    #[craft(handler)]
+    pub async fn admin_get_permissions(
+        self: Arc<Self>,
+        req: &mut Request,
+    ) -> AppResult<Json<Vec<AppPermission>>> {
+        let user_id = req.param::<String>("id").unwrap_or_default();
+
+        match self.db.get_permissions(&user_id) {
+            Ok(perms) => Ok(Json(perms)),
+            Err(e) => {
+                error!("Get permissions error: {e}");
+                Err(AppError {
+                    status_code: StatusCode::INTERNAL_SERVER_ERROR,
+                    description: "Failed to get permissions".to_string(),
+                })
+            }
+        }
+    }
+
+    #[craft(handler)]
+    pub async fn admin_set_permissions(
+        self: Arc<Self>,
+        req: &mut Request,
+        body: salvo::oapi::extract::JsonBody<SetPermissionsRequest>,
+    ) -> AppResult<Json<serde_json::Value>> {
+        let user_id = req.param::<String>("id").unwrap_or_default();
+
+        match self.db.set_permissions(&user_id, &body.permissions) {
+            Ok(()) => Ok(Json(serde_json::json!({"status": "ok"}))),
+            Err(e) => {
+                error!("Set permissions error: {e}");
+                Err(AppError {
+                    status_code: StatusCode::INTERNAL_SERVER_ERROR,
+                    description: "Failed to set permissions".to_string(),
+                })
+            }
+        }
+    }
+}

gamestream-webtransport-proxy/src/backend.rs

@@ -5,6 +5,7 @@ use salvo::oapi::ToSchema;
 use serde::{Deserialize, Serialize};
 use tokio::sync::RwLock;
 
+use crate::db::Db;
 use crate::state::StateFile;
 
 #[derive(Debug, Clone, Deserialize, Serialize)]
@@ -89,14 +90,25 @@ pub struct Backend {
     pub state: StateFile,
     pub streams: RwLock<HashMap<uuid::Uuid, Stream>>,
     pub port: u16,
+    pub db: Db,
 }
 
 impl Backend {
     pub fn new(port: u16) -> Result<Self> {
+        let project_dirs =
+            directories::ProjectDirs::from("xyz", "ohea", "gamestream-webtransport-proxy")
+                .ok_or(anyhow::anyhow!("Could not get project dirs"))?;
+        let data_dir = project_dirs.data_dir();
+        std::fs::create_dir_all(data_dir)?;
+        let db_path = data_dir.join("auth.db");
+
+        let db = Db::open(&db_path)?;
+
         Ok(Backend {
             state: StateFile::new()?,
             streams: RwLock::new(HashMap::new()),
             port,
+            db,
         })
     }
 }

gamestream-webtransport-proxy/src/db.rs

@@ -0,0 +1,659 @@
+use std::path::Path;
+use std::sync::Mutex;
+
+use anyhow::{Context, Result};
+use argon2::{
+    Argon2,
+    password_hash::{PasswordHash, PasswordHasher, PasswordVerifier, SaltString, rand_core::OsRng},
+};
+use salvo::oapi::ToSchema;
+use serde::{Deserialize, Serialize};
+
+#[derive(Debug, Clone, Serialize, Deserialize, ToSchema)]
+pub struct User {
+    pub id: String,
+    pub username: String,
+    pub is_admin: bool,
+    pub created_at: String,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize, ToSchema)]
+pub struct AppPermission {
+    pub server: String,
+    pub app_id: i64,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct Session {
+    pub token: String,
+    pub user_id: String,
+    pub created_at: String,
+    pub expires_at: String,
+}
+
+pub struct Db {
+    conn: Mutex<rusqlite::Connection>,
+}
+
+impl Db {
+    pub fn open(path: &Path) -> Result<Self> {
+        let conn = rusqlite::Connection::open(path)?;
+        let db = Db {
+            conn: Mutex::new(conn),
+        };
+        db.init()?;
+        Ok(db)
+    }
+
+    fn init(&self) -> Result<()> {
+        let conn = self.conn.lock().unwrap();
+        conn.execute_batch("PRAGMA foreign_keys = ON;")?;
+        conn.execute_batch(
+            "CREATE TABLE IF NOT EXISTS users (
+                id         TEXT PRIMARY KEY,
+                username   TEXT UNIQUE NOT NULL,
+                password   TEXT NOT NULL,
+                is_admin   INTEGER NOT NULL DEFAULT 0,
+                created_at TEXT NOT NULL
+            );
+
+            CREATE TABLE IF NOT EXISTS user_app_permissions (
+                user_id    TEXT NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+                server     TEXT NOT NULL,
+                app_id     INTEGER NOT NULL,
+                PRIMARY KEY (user_id, server, app_id)
+            );
+
+            CREATE TABLE IF NOT EXISTS sessions (
+                token      TEXT PRIMARY KEY,
+                user_id    TEXT NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+                created_at TEXT NOT NULL,
+                expires_at TEXT NOT NULL
+            );",
+        )?;
+        Ok(())
+    }
+
+    pub fn seed_admin_if_needed(&self) -> Result<Option<(String, String)>> {
+        let conn = self.conn.lock().unwrap();
+        let count: i64 = conn.query_row("SELECT COUNT(*) FROM users", [], |row| row.get(0))?;
+        if count > 0 {
+            return Ok(None);
+        }
+        drop(conn);
+
+        let password = generate_random_password();
+        let user = self.create_user("admin", &password, true)?;
+        Ok(Some((user.username, password)))
+    }
+
+    pub fn create_user(&self, username: &str, password: &str, is_admin: bool) -> Result<User> {
+        let id = uuid::Uuid::new_v4().to_string();
+        let password_hash = hash_password(password)?;
+        let created_at = now_iso8601();
+
+        let conn = self.conn.lock().unwrap();
+        conn.execute(
+            "INSERT INTO users (id, username, password, is_admin, created_at) VALUES (?1, ?2, ?3, ?4, ?5)",
+            rusqlite::params![id, username, password_hash, is_admin as i32, created_at],
+        ).context("Failed to create user (username may already exist)")?;
+
+        Ok(User {
+            id,
+            username: username.to_string(),
+            is_admin,
+            created_at,
+        })
+    }
+
+    pub fn verify_password(&self, username: &str, password: &str) -> Result<Option<User>> {
+        let conn = self.conn.lock().unwrap();
+        let mut stmt = conn.prepare(
+            "SELECT id, username, password, is_admin, created_at FROM users WHERE username = ?1",
+        )?;
+
+        let mut rows = stmt.query(rusqlite::params![username])?;
+        let row = match rows.next()? {
+            Some(r) => r,
+            None => return Ok(None),
+        };
+
+        let id: String = row.get(0)?;
+        let uname: String = row.get(1)?;
+        let stored_hash: String = row.get(2)?;
+        let is_admin: bool = row.get::<_, i32>(3)? != 0;
+        let created_at: String = row.get(4)?;
+
+        let parsed_hash =
+            PasswordHash::new(&stored_hash).map_err(|e| anyhow::anyhow!("Invalid hash: {e}"))?;
+        if Argon2::default()
+            .verify_password(password.as_bytes(), &parsed_hash)
+            .is_err()
+        {
+            return Ok(None);
+        }
+
+        Ok(Some(User {
+            id,
+            username: uname,
+            is_admin,
+            created_at,
+        }))
+    }
+
+    pub fn get_user(&self, user_id: &str) -> Result<Option<User>> {
+        let conn = self.conn.lock().unwrap();
+        let mut stmt = conn.prepare(
+            "SELECT id, username, is_admin, created_at FROM users WHERE id = ?1",
+        )?;
+
+        let mut rows = stmt.query(rusqlite::params![user_id])?;
+        match rows.next()? {
+            Some(row) => Ok(Some(User {
+                id: row.get(0)?,
+                username: row.get(1)?,
+                is_admin: row.get::<_, i32>(2)? != 0,
+                created_at: row.get(3)?,
+            })),
+            None => Ok(None),
+        }
+    }
+
+    pub fn list_users(&self) -> Result<Vec<User>> {
+        let conn = self.conn.lock().unwrap();
+        let mut stmt =
+            conn.prepare("SELECT id, username, is_admin, created_at FROM users ORDER BY username")?;
+        let users = stmt
+            .query_map([], |row| {
+                Ok(User {
+                    id: row.get(0)?,
+                    username: row.get(1)?,
+                    is_admin: row.get::<_, i32>(2)? != 0,
+                    created_at: row.get(3)?,
+                })
+            })?
+            .collect::<std::result::Result<Vec<_>, _>>()?;
+        Ok(users)
+    }
+
+    pub fn update_user(
+        &self,
+        user_id: &str,
+        new_password: Option<&str>,
+        new_is_admin: Option<bool>,
+    ) -> Result<bool> {
+        let conn = self.conn.lock().unwrap();
+
+        if let Some(password) = new_password {
+            let hash = hash_password(password)?;
+            conn.execute(
+                "UPDATE users SET password = ?1 WHERE id = ?2",
+                rusqlite::params![hash, user_id],
+            )?;
+        }
+
+        if let Some(is_admin) = new_is_admin {
+            conn.execute(
+                "UPDATE users SET is_admin = ?1 WHERE id = ?2",
+                rusqlite::params![is_admin as i32, user_id],
+            )?;
+        }
+
+        let changed = conn.changes() > 0;
+        Ok(changed)
+    }
+
+    pub fn delete_user(&self, user_id: &str) -> Result<bool> {
+        let conn = self.conn.lock().unwrap();
+        conn.execute("PRAGMA foreign_keys = ON;", [])?;
+        let rows = conn.execute("DELETE FROM users WHERE id = ?1", rusqlite::params![user_id])?;
+        Ok(rows > 0)
+    }
+
+    // Session management
+
+    pub fn create_session(&self, user_id: &str, max_age_seconds: i64) -> Result<String> {
+        let token = generate_session_token();
+        let created_at = now_iso8601();
+        let expires_at = future_iso8601(max_age_seconds);
+
+        let conn = self.conn.lock().unwrap();
+        conn.execute(
+            "INSERT INTO sessions (token, user_id, created_at, expires_at) VALUES (?1, ?2, ?3, ?4)",
+            rusqlite::params![token, user_id, created_at, expires_at],
+        )?;
+
+        Ok(token)
+    }
+
+    pub fn validate_session(&self, token: &str) -> Result<Option<User>> {
+        let conn = self.conn.lock().unwrap();
+        let now = now_iso8601();
+
+        let mut stmt = conn.prepare(
+            "SELECT u.id, u.username, u.is_admin, u.created_at
+             FROM sessions s
+             JOIN users u ON s.user_id = u.id
+             WHERE s.token = ?1 AND s.expires_at > ?2",
+        )?;
+
+        let mut rows = stmt.query(rusqlite::params![token, now])?;
+        match rows.next()? {
+            Some(row) => Ok(Some(User {
+                id: row.get(0)?,
+                username: row.get(1)?,
+                is_admin: row.get::<_, i32>(2)? != 0,
+                created_at: row.get(3)?,
+            })),
+            None => Ok(None),
+        }
+    }
+
+    pub fn delete_session(&self, token: &str) -> Result<bool> {
+        let conn = self.conn.lock().unwrap();
+        let rows = conn.execute(
+            "DELETE FROM sessions WHERE token = ?1",
+            rusqlite::params![token],
+        )?;
+        Ok(rows > 0)
+    }
+
+    pub fn cleanup_expired_sessions(&self) -> Result<usize> {
+        let conn = self.conn.lock().unwrap();
+        let now = now_iso8601();
+        let rows = conn.execute(
+            "DELETE FROM sessions WHERE expires_at <= ?1",
+            rusqlite::params![now],
+        )?;
+        Ok(rows)
+    }
+
+    // Permission management
+
+    pub fn set_permissions(&self, user_id: &str, permissions: &[AppPermission]) -> Result<()> {
+        let conn = self.conn.lock().unwrap();
+        conn.execute(
+            "DELETE FROM user_app_permissions WHERE user_id = ?1",
+            rusqlite::params![user_id],
+        )?;
+
+        let mut stmt = conn.prepare(
+            "INSERT INTO user_app_permissions (user_id, server, app_id) VALUES (?1, ?2, ?3)",
+        )?;
+        for perm in permissions {
+            stmt.execute(rusqlite::params![user_id, perm.server, perm.app_id])?;
+        }
+
+        Ok(())
+    }
+
+    pub fn get_permissions(&self, user_id: &str) -> Result<Vec<AppPermission>> {
+        let conn = self.conn.lock().unwrap();
+        let mut stmt = conn.prepare(
+            "SELECT server, app_id FROM user_app_permissions WHERE user_id = ?1",
+        )?;
+        let perms = stmt
+            .query_map(rusqlite::params![user_id], |row| {
+                Ok(AppPermission {
+                    server: row.get(0)?,
+                    app_id: row.get(1)?,
+                })
+            })?
+            .collect::<std::result::Result<Vec<_>, _>>()?;
+        Ok(perms)
+    }
+
+    pub fn check_app_permission(
+        &self,
+        user_id: &str,
+        server: &str,
+        app_id: i64,
+    ) -> Result<bool> {
+        // Check if user is admin first
+        let conn = self.conn.lock().unwrap();
+        let is_admin: i32 = conn.query_row(
+            "SELECT is_admin FROM users WHERE id = ?1",
+            rusqlite::params![user_id],
+            |row| row.get(0),
+        )?;
+        if is_admin != 0 {
+            return Ok(true);
+        }
+
+        let count: i64 = conn.query_row(
+            "SELECT COUNT(*) FROM user_app_permissions WHERE user_id = ?1 AND server = ?2 AND app_id = ?3",
+            rusqlite::params![user_id, server, app_id],
+            |row| row.get(0),
+        )?;
+        Ok(count > 0)
+    }
+}
+
+fn hash_password(password: &str) -> Result<String> {
+    let salt = SaltString::generate(&mut OsRng);
+    let hash = Argon2::default()
+        .hash_password(password.as_bytes(), &salt)
+        .map_err(|e| anyhow::anyhow!("Failed to hash password: {e}"))?;
+    Ok(hash.to_string())
+}
+
+fn generate_session_token() -> String {
+    let mut bytes = [0u8; 32];
+    openssl::rand::rand_bytes(&mut bytes).expect("Failed to generate random bytes");
+    hex::encode(bytes)
+}
+
+fn generate_random_password() -> String {
+    let mut bytes = [0u8; 16];
+    openssl::rand::rand_bytes(&mut bytes).expect("Failed to generate random bytes");
+    hex::encode(bytes)
+}
+
+fn now_iso8601() -> String {
+    std::time::SystemTime::now()
+        .duration_since(std::time::UNIX_EPOCH)
+        .unwrap()
+        .as_secs()
+        .to_string()
+}
+
+fn future_iso8601(seconds_from_now: i64) -> String {
+    let now = std::time::SystemTime::now()
+        .duration_since(std::time::UNIX_EPOCH)
+        .unwrap()
+        .as_secs();
+    (now as i64 + seconds_from_now).to_string()
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    fn test_db() -> Db {
+        let conn = rusqlite::Connection::open_in_memory().unwrap();
+        let db = Db {
+            conn: Mutex::new(conn),
+        };
+        db.init().unwrap();
+        db
+    }
+
+    #[test]
+    fn test_create_and_get_user() {
+        let db = test_db();
+        let user = db.create_user("alice", "password123", false).unwrap();
+        assert_eq!(user.username, "alice");
+        assert!(!user.is_admin);
+
+        let fetched = db.get_user(&user.id).unwrap().unwrap();
+        assert_eq!(fetched.username, "alice");
+        assert_eq!(fetched.id, user.id);
+    }
+
+    #[test]
+    fn test_verify_correct_password() {
+        let db = test_db();
+        db.create_user("bob", "secret", false).unwrap();
+
+        let result = db.verify_password("bob", "secret").unwrap();
+        assert!(result.is_some());
+        assert_eq!(result.unwrap().username, "bob");
+    }
+
+    #[test]
+    fn test_verify_wrong_password() {
+        let db = test_db();
+        db.create_user("bob", "secret", false).unwrap();
+
+        let result = db.verify_password("bob", "wrong").unwrap();
+        assert!(result.is_none());
+    }
+
+    #[test]
+    fn test_verify_nonexistent_user() {
+        let db = test_db();
+        let result = db.verify_password("nobody", "pass").unwrap();
+        assert!(result.is_none());
+    }
+
+    #[test]
+    fn test_duplicate_username_rejected() {
+        let db = test_db();
+        db.create_user("alice", "pass1", false).unwrap();
+        let result = db.create_user("alice", "pass2", false);
+        assert!(result.is_err());
+    }
+
+    #[test]
+    fn test_list_users() {
+        let db = test_db();
+        db.create_user("charlie", "pass", false).unwrap();
+        db.create_user("alice", "pass", true).unwrap();
+
+        let users = db.list_users().unwrap();
+        assert_eq!(users.len(), 2);
+        assert_eq!(users[0].username, "alice"); // sorted
+        assert_eq!(users[1].username, "charlie");
+    }
+
+    #[test]
+    fn test_update_user_password() {
+        let db = test_db();
+        let user = db.create_user("dave", "oldpass", false).unwrap();
+
+        db.update_user(&user.id, Some("newpass"), None).unwrap();
+
+        assert!(db.verify_password("dave", "oldpass").unwrap().is_none());
+        assert!(db.verify_password("dave", "newpass").unwrap().is_some());
+    }
+
+    #[test]
+    fn test_update_user_admin_status() {
+        let db = test_db();
+        let user = db.create_user("eve", "pass", false).unwrap();
+        assert!(!user.is_admin);
+
+        db.update_user(&user.id, None, Some(true)).unwrap();
+        let updated = db.get_user(&user.id).unwrap().unwrap();
+        assert!(updated.is_admin);
+    }
+
+    #[test]
+    fn test_delete_user() {
+        let db = test_db();
+        let user = db.create_user("frank", "pass", false).unwrap();
+        assert!(db.delete_user(&user.id).unwrap());
+        assert!(db.get_user(&user.id).unwrap().is_none());
+    }
+
+    #[test]
+    fn test_delete_nonexistent_user() {
+        let db = test_db();
+        assert!(!db.delete_user("nonexistent-id").unwrap());
+    }
+
+    #[test]
+    fn test_create_and_validate_session() {
+        let db = test_db();
+        let user = db.create_user("grace", "pass", false).unwrap();
+
+        let token = db.create_session(&user.id, 3600).unwrap();
+        let validated = db.validate_session(&token).unwrap();
+        assert!(validated.is_some());
+        assert_eq!(validated.unwrap().username, "grace");
+    }
+
+    #[test]
+    fn test_expired_session_rejected() {
+        let db = test_db();
+        let user = db.create_user("heidi", "pass", false).unwrap();
+
+        // Create session that expired 10 seconds ago
+        let token = db.create_session(&user.id, -10).unwrap();
+        let validated = db.validate_session(&token).unwrap();
+        assert!(validated.is_none());
+    }
+
+    #[test]
+    fn test_invalid_token_rejected() {
+        let db = test_db();
+        let validated = db.validate_session("bogus-token").unwrap();
+        assert!(validated.is_none());
+    }
+
+    #[test]
+    fn test_delete_session() {
+        let db = test_db();
+        let user = db.create_user("ivan", "pass", false).unwrap();
+        let token = db.create_session(&user.id, 3600).unwrap();
+
+        assert!(db.delete_session(&token).unwrap());
+        assert!(db.validate_session(&token).unwrap().is_none());
+    }
+
+    #[test]
+    fn test_delete_user_cascades_sessions() {
+        let db = test_db();
+        let user = db.create_user("judy", "pass", false).unwrap();
+        let token = db.create_session(&user.id, 3600).unwrap();
+
+        db.delete_user(&user.id).unwrap();
+        assert!(db.validate_session(&token).unwrap().is_none());
+    }
+
+    #[test]
+    fn test_delete_user_cascades_permissions() {
+        let db = test_db();
+        let user = db.create_user("karl", "pass", false).unwrap();
+        db.set_permissions(
+            &user.id,
+            &[AppPermission {
+                server: "srv".to_string(),
+                app_id: 1,
+            }],
+        )
+        .unwrap();
+
+        db.delete_user(&user.id).unwrap();
+        // Permissions table should be empty for this user
+        let perms = db.get_permissions(&user.id).unwrap();
+        assert!(perms.is_empty());
+    }
+
+    #[test]
+    fn test_set_and_get_permissions() {
+        let db = test_db();
+        let user = db.create_user("laura", "pass", false).unwrap();
+
+        let perms = vec![
+            AppPermission {
+                server: "server1".to_string(),
+                app_id: 10,
+            },
+            AppPermission {
+                server: "server1".to_string(),
+                app_id: 20,
+            },
+        ];
+        db.set_permissions(&user.id, &perms).unwrap();
+
+        let fetched = db.get_permissions(&user.id).unwrap();
+        assert_eq!(fetched.len(), 2);
+    }
+
+    #[test]
+    fn test_set_permissions_replaces_existing() {
+        let db = test_db();
+        let user = db.create_user("mike", "pass", false).unwrap();
+
+        db.set_permissions(
+            &user.id,
+            &[AppPermission {
+                server: "s1".to_string(),
+                app_id: 1,
+            }],
+        )
+        .unwrap();
+
+        db.set_permissions(
+            &user.id,
+            &[AppPermission {
+                server: "s2".to_string(),
+                app_id: 2,
+            }],
+        )
+        .unwrap();
+
+        let perms = db.get_permissions(&user.id).unwrap();
+        assert_eq!(perms.len(), 1);
+        assert_eq!(perms[0].server, "s2");
+        assert_eq!(perms[0].app_id, 2);
+    }
+
+    #[test]
+    fn test_check_app_permission_allowed() {
+        let db = test_db();
+        let user = db.create_user("nancy", "pass", false).unwrap();
+        db.set_permissions(
+            &user.id,
+            &[AppPermission {
+                server: "srv".to_string(),
+                app_id: 42,
+            }],
+        )
+        .unwrap();
+
+        assert!(db.check_app_permission(&user.id, "srv", 42).unwrap());
+    }
+
+    #[test]
+    fn test_check_app_permission_denied() {
+        let db = test_db();
+        let user = db.create_user("oscar", "pass", false).unwrap();
+
+        assert!(!db.check_app_permission(&user.id, "srv", 42).unwrap());
+    }
+
+    #[test]
+    fn test_check_app_permission_admin_bypass() {
+        let db = test_db();
+        let user = db.create_user("pat", "pass", true).unwrap();
+        // Admin has no explicit permissions but should pass
+        assert!(db.check_app_permission(&user.id, "srv", 42).unwrap());
+    }
+
+    #[test]
+    fn test_cleanup_expired_sessions() {
+        let db = test_db();
+        let user = db.create_user("quinn", "pass", false).unwrap();
+
+        let _expired = db.create_session(&user.id, -10).unwrap();
+        let valid = db.create_session(&user.id, 3600).unwrap();
+
+        let cleaned = db.cleanup_expired_sessions().unwrap();
+        assert_eq!(cleaned, 1);
+
+        // Valid session should still work
+        assert!(db.validate_session(&valid).unwrap().is_some());
+    }
+
+    #[test]
+    fn test_seed_admin_if_needed() {
+        let db = test_db();
+
+        // First call should create admin
+        let result = db.seed_admin_if_needed().unwrap();
+        assert!(result.is_some());
+        let (username, password) = result.unwrap();
+        assert_eq!(username, "admin");
+        assert!(!password.is_empty());
+
+        // Verify can login with generated password
+        let user = db.verify_password("admin", &password).unwrap().unwrap();
+        assert!(user.is_admin);
+
+        // Second call should be a no-op
+        let result = db.seed_admin_if_needed().unwrap();
+        assert!(result.is_none());
+    }
+}

gamestream-webtransport-proxy/src/main.rs

@@ -3,9 +3,11 @@ use salvo::logging::Logger;
 use salvo::prelude::*;
 
 mod apps;
+mod auth;
 mod backend;
 mod certs;
 mod common;
+mod db;
 mod gamestream;
 mod pair;
 mod proxy;
@@ -40,12 +42,70 @@ fn create_static_handler() -> impl Handler {
 
 async fn run_backend(port: u16) -> Result<()> {
     let backend = backend::Backend::new(port)?;
+
+    // Seed default admin user if no users exist
+    if let Some((username, password)) = backend.db.seed_admin_if_needed()? {
+        tracing::info!("Created default admin user: {username}");
+        println!("===========================================");
+        println!("  Default admin credentials:");
+        println!("  Username: {username}");
+        println!("  Password: {password}");
+        println!("===========================================");
+    }
+
+    // Clean up expired sessions on startup
+    if let Ok(cleaned) = backend.db.cleanup_expired_sessions() {
+        if cleaned > 0 {
+            tracing::info!("Cleaned up {cleaned} expired sessions");
+        }
+    }
+
     let backend_arc = std::sync::Arc::new(backend);
 
+    let auth_middleware = auth::SessionAuthMiddleware {
+        db: std::sync::Arc::new(
+            db::Db::open(
+                &directories::ProjectDirs::from("xyz", "ohea", "gamestream-webtransport-proxy")
+                    .ok_or(anyhow!("Could not get project dirs"))?
+                    .data_dir()
+                    .join("auth.db"),
+            )?,
+        ),
+    };
+
     let router = Router::new()
-        .push(Router::with_path("api/pair").post(backend_arc.post_pair()))
+        // Public auth routes
-        .push(Router::with_path("api/apps").get(backend_arc.get_apps()))
+        .push(Router::with_path("api/auth/login").post(backend_arc.login()))
-        .push(Router::with_path("api/stream/start").post(backend_arc.post_stream_start()))
+        // Authenticated routes
+        .push(
+            Router::with_path("api")
+                .hoop(auth_middleware)
+                .push(Router::with_path("auth/logout").post(backend_arc.logout()))
+                .push(Router::with_path("auth/me").get(backend_arc.me()))
+                .push(Router::with_path("pair").post(backend_arc.post_pair()))
+                .push(Router::with_path("apps").get(backend_arc.get_apps()))
+                .push(Router::with_path("stream/start").post(backend_arc.post_stream_start()))
+                // Admin-only routes
+                .push(
+                    Router::with_path("admin")
+                        .hoop(auth::AdminCheckMiddleware)
+                        .push(
+                            Router::with_path("users")
+                                .get(backend_arc.admin_list_users())
+                                .post(backend_arc.admin_create_user()),
+                        )
+                        .push(
+                            Router::with_path("users/<id>")
+                                .put(backend_arc.admin_update_user())
+                                .delete(backend_arc.admin_delete_user()),
+                        )
+                        .push(
+                            Router::with_path("users/<id>/permissions")
+                                .get(backend_arc.admin_get_permissions())
+                                .put(backend_arc.admin_set_permissions()),
+                        ),
+                ),
+        )
         .push(Router::with_path("{*path}").get(create_static_handler()));
     let doc = OpenApi::new("test api", "0.0.1").merge_router(&router);
     let router = router
@@ -66,8 +126,6 @@ async fn run_backend(port: u16) -> Result<()> {
 
 async fn run_proxy(port: u16, stream_id: uuid::Uuid) -> Result<()> {
     let (config, cert_hash) = certs::get_webtransport_stream_config(stream_id)?;
-    //let config = certs::get_http_stream_config()?;
-    //let cert_hash = [0; 32];
     let proxy = proxy::Proxy::new(cert_hash);
     let proxy_arc = std::sync::Arc::new(proxy);
 

gamestream-webtransport-proxy/src/stream.rs

@@ -7,6 +7,7 @@ use serde::{Deserialize, Serialize};
 use tracing::{debug, error, info};
 
 use crate::{
+    auth,
     common::{AppError, AppResult, get_url},
     proxy, responses,
     state::{GamestreamServer, StateReadAccess, StateReader},
@@ -81,12 +82,40 @@ impl crate::backend::Backend {
         self: ::std::sync::Arc<Self>,
         body: salvo::oapi::extract::JsonBody<PostStreamStartParams>,
         req: &mut Request,
+        depot: &mut Depot,
     ) -> AppResult<Json<PostStreamStartResponse>> {
         let standard_error = Err(crate::common::AppError {
             status_code: StatusCode::INTERNAL_SERVER_ERROR,
             description: "Could not start stream".to_string(),
         });
 
+        // Check app permission
+        let user = match auth::get_user_from_depot(depot) {
+            Some(u) => u.clone(),
+            None => {
+                error!("post_stream_start reached without authenticated user in depot");
+                return Err(AppError {
+                    status_code: StatusCode::UNAUTHORIZED,
+                    description: "Not authenticated".to_string(),
+                });
+            }
+        };
+        if !user.is_admin {
+            match self.db.check_app_permission(&user.id, &body.server, body.id as i64) {
+                Ok(true) => {}
+                Ok(false) => {
+                    return Err(AppError {
+                        status_code: StatusCode::FORBIDDEN,
+                        description: "You do not have permission to access this application".to_string(),
+                    });
+                }
+                Err(e) => {
+                    error!("Permission check error: {e}");
+                    return standard_error;
+                }
+            }
+        }
+
         let reader = self.state.read().await;
 
         let server = match get_server(&reader, &body.server) {