Added security headers to web-vault (fixes #44)

src/api/web.rs

@@ -1,8 +1,9 @@
 use std::io;
 use std::path::{Path, PathBuf};
 
+use rocket::request::Request;
+use rocket::response::{self, NamedFile, Responder};
 use rocket::Route;
-use rocket::response::NamedFile;
 use rocket_contrib::Json;
 
 use CONFIG;
@@ -17,27 +18,33 @@ pub fn routes() -> Vec<Route> {
 
 // TODO: Might want to use in memory cache: https://github.com/hgzimmerman/rocket-file-cache
 #[get("/")]
-fn web_index() -> io::Result<NamedFile> {
-    NamedFile::open(
-        Path::new(&CONFIG.web_vault_folder)
-            .join("index.html"))
+fn web_index() -> WebHeaders<io::Result<NamedFile>> {
+    web_files("index.html".into())
 }
 
 #[get("/<p..>", rank = 1)] // Only match this if the other routes don't match
-fn web_files(p: PathBuf) -> io::Result<NamedFile> {
-    NamedFile::open(
-        Path::new(&CONFIG.web_vault_folder)
-            .join(p))
+fn web_files(p: PathBuf) -> WebHeaders<io::Result<NamedFile>> {
+    WebHeaders(NamedFile::open(Path::new(&CONFIG.web_vault_folder).join(p)))
 }
 
+struct WebHeaders<R>(R);
+
+impl<'r, R: Responder<'r>> Responder<'r> for WebHeaders<R> {
+    fn respond_to(self, req: &Request) -> response::Result<'r> {
+        let mut res = self.0.respond_to(req)?;
+
+        res.set_raw_header("Referrer-Policy", "same-origin");
+        res.set_raw_header("X-Frame-Options", "SAMEORIGIN");
+        res.set_raw_header("X-Content-Type-Options", "nosniff");
+        res.set_raw_header("X-XSS-Protection", "1; mode=block");
+
+        Ok(res)
+    }
+}
 
 #[get("/attachments/<uuid>/<file..>")]
 fn attachments(uuid: String, file: PathBuf) -> io::Result<NamedFile> {
-    NamedFile::open(
-        Path::new(&CONFIG.attachments_folder)
-            .join(uuid)
-            .join(file)
-    )
+    NamedFile::open(Path::new(&CONFIG.attachments_folder).join(uuid).join(file))
 }