File

mod_auth_http_cookie/README.markdown @ 5447:aa4828f040c5

mod_http_oauth2: Enforce client scope restrictions in authorization When registering a client, a scope field can be included as a promise to only ever use those. Here we enforce that promise, if given, ensuring a client can't request or be granted a scope it didn't provide in its registration. While currently there is no restrictions at registration time, this could be changed in the future in various ways.
author Kim Alvefur <zash@zash.se>
date Thu, 11 May 2023 19:33:44 +0200
parent 3037:bae7b0a002ef
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---
labels:
- Stage-Alpha
...

Introduction
============

This is an experimental authentication module that does an asynchronous
HTTP call to verify username and password.

This is a (possibly temporary) fork of mod_http_auth_async that adds
support for authentication using a cookie and SASL EXTERNAL.

Details
=======

When a user attempts to authenticate to Prosody, this module takes the
username and password and does a HTTP GET request with [Basic
authentication][rfc7617] to the configured `http_auth_url`.

Configuration
=============

``` lua
VirtualHost "example.com"
  authentication = "http_auth_cookie"
  http_auth_url = "http://example.com/auth"
  http_cookie_auth_url = "https://example.com/testcookie.php?user=$user"
```

Cookie Authentication
=====================

It is possible to link authentication to an existing web application. This
has the benefit that the user logging into the web application in their
browser will automatically log them into their XMPP account.

There are some prerequisites for this to work:

  - The BOSH or Websocket requests must include the application's cookie in
  the headers sent to Prosody. This typically means the web chat code needs
  to be served from the same domain as the web application.
  
  - The web application must have a URL that returns 200 OK when called with
  a valid cookie, and returns a different status code if the cookie is invalid
  or not currently logged in.
  
  - The XMPP username for the user must be passed to Prosody by the client, or
  returned in the 200 response from the web application.

Set `http_cookie_auth_url` to the web application URL that is used to check the
cookie. You may use the variables `$host` for the XMPP host and `$user` for the
XMPP username.

If the `$user` variable is included in the URL, the client must provide the username
via the "authzid" in the SASL EXTERNAL authentication mechanism.

If the `$user` variable is *not* included in the URL, Prosody expects the web application's response to be the username instead, as UTF-8 text/plain.

Compatibility
=============

Requires Prosody trunk