Mercurial > prosody-modules
view mod_auth_http/README.markdown @ 5193:2bb29ece216b
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
| author | Kim Alvefur <zash@zash.se> |
|---|---|
| date | Fri, 03 Mar 2023 21:14:19 +0100 |
| parents | 1da63fe35ef3 |
| children |
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--- labels: - Stage-Alpha summary: "Authenticate users against an external HTTP API" ... # Overview This authentication module allows Prosody to authenticate users against an external HTTP service. # Configuration ``` lua VirtualHost "example.com" authentication = "http" http_auth_url = "http://example.com/auth" ``` If the API requires Prosody to authenticate, you can provide static credentials using HTTP Basic authentication, like so: ``` http_auth_credentials = "prosody:secret-password" ``` # Developers This section contains information for developers who wish to implement a HTTP service that Prosody can use for authentication. ## Protocol Prosody will make a HTTP request to the configured API URL with an appended `/METHOD` where `METHOD` is one of the methods described below. GET methods must expect a series of URL-encoded query parameters, while POST requests will receive an URL-encoded form (i.e. `application/x-www-form-urlencoded`). ## Parameters user : The username, e.g. `stephanie` for the JID `stephanie@example.com`. server : The host part of the user's JID, e.g. `example.com` for the JID `stephanie@example.com`. pass : For methods that verify or set a user's password, the password will be supplied in this parameter, otherwise it is not set. ## Methods The only mandatory methods that the service must implement are `check_password` and `user_exists`. Unsupported methods should return a HTTP status code of `501 Not Implemented`, but other error codes will also be handled by Prosody. Method HTTP method Success codes Error codes Response -------- ---- --- ----------------- ----------------------------------------------------------------- register POST 201 409 (user exists) check\_password GET 200 A text string of `true` if the user exists, or `false` otherwise. user\_exists GET 200 A text string of `true` if the user exists, or `false` otherwise. set\_password POST 200, 201 or 204 remove\_user POST 200, 201 or 204 ## Examples With the following configuration: ``` authentication = "http" http_auth_url = "https://auth.example.net/api" If a user connects and tries to log in to Prosody as "romeo@example.net" with the password "iheartjuliet", Prosody would make the following HTTP request: ``` https://auth.example.net/api/check_password?user=romeo&server=example.net&pass=iheartjuliet ``` # Compatibility Requires Prosody 0.11.0 or later.