From 3b89dc69da0f88cf8e2290523fa50656ac2ebb5d Mon Sep 17 00:00:00 2001
From: Yves Fischer <yvesf-git@xapek.org>
Date: Mon, 26 Nov 2018 01:35:11 +0100
Subject: Proof of concept with totp

---
 src/auth_handler/mod.rs | 170 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 170 insertions(+)
 create mode 100644 src/auth_handler/mod.rs

(limited to 'src/auth_handler/mod.rs')

diff --git a/src/auth_handler/mod.rs b/src/auth_handler/mod.rs
new file mode 100644
index 0000000..b4e02d1
--- /dev/null
+++ b/src/auth_handler/mod.rs
@@ -0,0 +1,170 @@
+#![allow(warnings)]
+
+use std::cell::Cell;
+use std::collections::HashMap;
+use std::io;
+use std::marker::Sync;
+use std::str;
+use std::str::FromStr;
+use std::sync::{Arc, RwLock, Mutex, MutexGuard};
+use std::cell::RefCell;
+
+use time::{Tm, Duration};
+use http::{Request, Response, StatusCode, Method};
+use tokio::prelude::*;
+use horrorshow;
+use cookie::{Cookie,CookieBuilder};
+use bytes::Bytes;
+
+use router;
+use cookie_store::CookieStore;
+use cookie_store::to_cookie;
+use http_server::HttpHandler;
+
+mod urls;
+mod handler_login;
+mod handler_info;
+
+pub(in auth_handler) struct HeaderExtract<'a> {
+    totp_secrets: Vec<&'a str>,
+    cookies: Vec<Cookie<'a>>,
+}
+
+pub struct HeaderMissing {
+    name: &'static str,
+}
+
+static HTTP_HEADER_AUTHORIZATION: &'static str = r"Authorization";
+static HTTP_HEADER_X_ORIGINAL_URL: &'static str = r"X-Original-Url";
+static HTTP_HEADER_WWW_AUTHENTICATE: &'static str = r"WWW-Authenticate";
+static HTTP_HEADER_X_TOTP_SECRET: &'static str = r"X-Totp-Secret";
+static COOKIE_NAME: &'static str = r"totp_cookie";
+
+#[derive(Clone)]
+pub struct AuthHandler {
+    routing_table: router::RoutingTable<urls::Route>,
+}
+
+pub(in auth_handler) fn make_response(code: StatusCode, body: String) -> Response<String> {
+    Response::builder().status(code).body(body).unwrap()
+}
+
+pub(in auth_handler) fn error_handler_internal(body: String) -> Response<String> {
+    Response::builder().status(StatusCode::INTERNAL_SERVER_ERROR).body(body).unwrap()
+}
+
+impl HttpHandler<super::ApplicationState> for AuthHandler {
+    fn respond(&self, state: &super::ApplicationState, req: Request<Bytes>) -> Response<String> {
+        match self.routing_table.match_path(req.uri().path()) {
+            Ok((urls::Route::Info, rest)) => handler_info::respond(self, state, &req, rest),
+            Ok((urls::Route::Login, rest)) => self.login(state, &req, rest),
+            Ok((urls::Route::Logout, rest)) => self.logout(state, &req, rest),
+            Ok((urls::Route::Check, rest)) => self.check(state, &req, rest),
+            Err(error) => match error {
+                router::NoMatchingRoute =>
+                    make_response(StatusCode::NOT_FOUND, "Resource not found".to_string()),
+            }
+        }
+    }
+}
+
+pub fn is_logged_in(cookies: &Vec<Cookie>, cookie_store: &CookieStore) -> bool {
+    for cookie in cookies {
+        if cookie.name() == COOKIE_NAME {
+            let cookie_value = to_cookie(cookie.value());
+            if cookie_value.is_some() && cookie_store.is_cookie_authenticated(&cookie_value.unwrap()) {
+                return true;
+            }
+        }
+    }
+    false
+}
+
+
+impl AuthHandler {
+    pub fn make() -> AuthHandler {
+        AuthHandler { routing_table: urls::create_routing_table() }
+    }
+
+    fn login<'a>(&self, state: &super::ApplicationState, req: &Request<Bytes>, path_rest: &'a str,
+    ) -> Response<String> {
+        let header_infos = match Self::parse_header_infos(req) {
+            Ok(infos) => infos,
+            Err(message) => return error_handler_internal(message),
+        };
+        match *req.method() {
+            Method::GET => handler_login::GET(&header_infos, state, path_rest),
+            Method::POST => handler_login::POST(&header_infos, state, req),
+            _ => error_handler_internal("Wrong method".to_string()),
+        }
+    }
+
+    fn logout<'a>(&self, state: &super::ApplicationState, req: &Request<Bytes>, path_rest: &'a str,
+    ) -> Response<String> {
+        let header_infos = match Self::parse_header_infos(req) {
+            Ok(infos) => infos,
+            Err(message) => return error_handler_internal(message),
+        };
+
+        let body = format!("Rest: {}", path_rest);
+        Response::builder().body(body.to_string()).unwrap()
+    }
+
+
+    fn check<'a>(&self, state: &super::ApplicationState, req: &Request<Bytes>, path_rest: &'a str) -> Response<String> {
+        let header_infos = match Self::parse_header_infos(req) {
+            Ok(infos) => infos,
+            Err(message) => return error_handler_internal(message),
+        };
+        if is_logged_in(&header_infos.cookies, &state.cookie_store) {
+            make_response(StatusCode::OK, "".to_string())
+        } else {
+            make_response(StatusCode::UNAUTHORIZED, "Cookie expired".to_string())
+        }
+    }
+
+
+    fn parse_header_infos(req: &Request<Bytes>) -> Result<HeaderExtract, String> {
+        let mut totp_secrets = Vec::new();
+        for header_value in req.headers().get_all(HTTP_HEADER_X_TOTP_SECRET) {
+            let value = header_value.to_str().or(Err("Failed to read totp-secret header value"))?;
+            totp_secrets.push(value);
+        }
+
+        let mut cookies = Vec::new();
+        for header_value in req.headers().get_all(::http::header::COOKIE) {
+            let value = header_value.to_str().or(Err("Failed to read cookie value"))?;
+            let cookie = Cookie::parse(value).or(Err("Failed to parse cookie value"))?;
+            cookies.push(cookie);
+        }
+
+        Ok(HeaderExtract { totp_secrets, cookies })
+    }
+}
+
+#[cfg(test)]
+mod test1 {
+    //    use super::*;
+    use test::Bencher;
+    //    use horrorshow::prelude::*;
+    use horrorshow::helper::doctype;
+
+    #[bench]
+    fn bench_1(_: &mut Bencher) {
+        let _ = format!("{}", html! {
+: doctype::HTML;
+html {
+head {
+title: "Hello world!";
+}
+body {
+// attributes
+h1(id = "heading") {
+// Insert escaped text
+: "Hello! This is <html />"
+}
+}
+}
+});
+    }
+}
-- 
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