mod_http_oauth2: Implement stateless dynamic client registration Replaces previous explicit registration that required either the additional module mod_adhoc_oauth2_client or manually editing the database. That method was enough to have something to test with, but would not probably not scale easily. Dynamic client registration allows creating clients on the fly, which may be even easier in theory. In order to not allow basically unauthenticated writes to the database, we implement a stateless model here. per_host_key := HMAC(config -> oauth2_registration_key, hostname) client_id := JWT { client metadata } signed with per_host_key client_secret := HMAC(per_host_key, client_id) This should ensure everything we need to know is part of the client_id, allowing redirects etc to be validated, and the client_secret can be validated with only the client_id and the per_host_key. A nonce injected into the client_id JWT should ensure nobody can submit the same client metadata and retrieve the same client_secret

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labels:
- 'Type-Auth'
summary: OAuth authentication
...

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

This is an authentication module for the SASL OAUTHBEARER mechanism, as provided by `mod_sasl_oauthbearer`.

You can use this to log in via OAuth, for example if you want your user's to log in with Github, Twitter, Reddit etc.

The XMPP client needs get an OAuth token from the provider (e.g. Github) and send that to Prosody.
This module will then verify that token by calling the `oauth_url` you've configured.

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

Per VirtualHost, you'll need to supply your OAuth client Id, secret and the URL which
Prosody must call in order to verify the OAuth token it receives from the XMPP client.

For example, for Github:

	oauth_client_id = "13f8e9cc8928b3409822"
	oauth_client_secret = "983161fd3ah608ea7ef35382668aad1927463978"
	oauth_url = "https://api.github.com/applications/{{oauth_client_id}}/tokens/{{password}}";

	authentication = "oauthbearer"