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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 |
parent | 4687:41ddb782320c |
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<!DOCTYPE html> <html> <head> <style> /* MIT License Copyright (c) 2020 Simple.css (Kev Quirk) Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: */ :root { --sans-font: -apple-system, BlinkMacSystemFont, "Avenir Next", Avenir, "Nimbus Sans L", Roboto, Noto, "Segoe UI", Arial, Helvetica, "Helvetica Neue", sans-serif; --mono-font: Consolas, Menlo, Monaco, "Andale Mono", "Ubuntu Mono", monospace; --base-fontsize: 1.15rem; --header-scale: 1.25; --line-height: 1.618; /* Default (light) theme */ --bg: #FFF; --accent-bg: #F5F7FF; --text: #212121; --text-light: #585858; --border: #D8DAE1; --accent: #0D47A1; --accent-light: #90CAF9; --code: #D81B60; --preformatted: #444; --marked: #FFDD33; --disabled: #EFEFEF; } /* Dark theme */ @media (prefers-color-scheme: dark) { :root { --bg: #212121; --accent-bg: #2B2B2B; --text: #DCDCDC; --text-light: #ABABAB; --border: #666; --accent: #FFB300; --accent-light: #FFECB3; --code: #F06292; --preformatted: #CCC; --disabled: #111; } img, video { opacity: .6; } } html { /* Set the font globally */ font-family: var(--sans-font); } /* Make the body a nice central block */ body { color: var(--text); background: var(--bg); font-size: var(--base-fontsize); line-height: var(--line-height); display: flex; min-height: 100vh; flex-direction: column; flex: 1; margin: 0 auto; max-width: 45rem; padding: 0 .5rem; overflow-x: hidden; word-break: break-word; overflow-wrap: break-word; } /* Fix line height when title wraps */ h1, h2, h3 { line-height: 1.1; } /* Format headers */ h1 { font-size: calc(var(--base-fontsize) * var(--header-scale) * var(--header-scale) * var(--header-scale) * var(--header-scale)); margin-top: calc(var(--line-height) * 1.5rem); } h2 { font-size: calc(var(--base-fontsize) * var(--header-scale) * var(--header-scale) * var(--header-scale)); margin-top: calc(var(--line-height) * 1.5rem); } h3 { font-size: calc(var(--base-fontsize) * var(--header-scale) * var(--header-scale)); margin-top: calc(var(--line-height) * 1.5rem); } h4 { font-size: calc(var(--base-fontsize) * var(--header-scale)); margin-top: calc(var(--line-height) * 1.5rem); } h5 { font-size: var(--base-fontsize); margin-top: calc(var(--line-height) * 1.5rem); } h6 { font-size: calc(var(--base-fontsize) / var(--header-scale)); margin-top: calc(var(--line-height) * 1.5rem); } /* Format links & buttons */ a, a:visited { color: var(--accent); } a:hover { text-decoration: none; } /* Format tables */ table { border-collapse: collapse; width: 100%; margin: 1.5rem 0; } td, th { border: 1px solid var(--border); text-align: left; padding: .5rem; } th { background: var(--accent-bg); font-weight: bold; } tr:nth-child(even) { background: var(--accent-bg); } /* Lists */ ol, ul { padding-left: 3rem; } </style> </head> <body> <div class="container"> <h1>OMEMO encryption information</h1> <p>OMEMO is an end-to-end encryption technology that protects communication between users on the XMPP network. Find out more information <a href="https://conversations.im/omemo/">about OMEMO</a> and <a href="https://omemo.top/">a list of OMEMO-capable software</a>. </p> <p>If you are on this page, it may mean that you received an encrypted message that your client could not decrypt. Some possible causes of this problem are:</p> <ul> <li>Your XMPP client does not support OMEMO, or does not have it enabled.</li> <li>Your server software is too old (Prosody 0.11.x is recommended) or misconfigured.</li> <li>The sender's client, or your client, has a bug in its OMEMO support.</li> </ul> <h2>Advanced information</h2> <p>Here you can find some advanced information that may be useful when debugging why an OMEMO message could not be decrypted. You may share this page privately with XMPP developers to help them diagnose your problem. </p> <h3>Message status</h3> <p>This was an {message.encryption} {message.direction} {message.type} message. The sending device id was <tt>{omemo.sender_id}</tt>.</p> <h4>Recipient devices</h4> {message.has_any_keys& <table class="table"> <tr> <th>Device ID</th> <th>Status</th> <th>Comment</th> </tr> {rids%<tr> <td>{idx}</td> <td>{item.status?Unknown device} {item.prekey&<span class="badge badge-warning">Used pre-key</span>}</td> <td>{item.comment?}</td> </tr>} </table>} {message.has_no_keys&<p><strong>This message did not contain any OMEMO keys.</strong></p>} <h3>Account status</h3> <p>{user}'s account has {omemo.status} with OMEMO.</p> <h4>Registered OMEMO devices</h4> <table class="table"> <tr> <th>Device ID</th> <th>Status</th> <th>Bundle</th> <th>Access</th> </tr> {omemo.devices%<tr> <td>{idx?<i>N/A</i>}</td> <td>{item.status?<i>N/A</i>}</td> <td>{item.bundle?<i>N/A</i>}</td> <td>{item.access_model?<i>N/A</i>}</td> </tr>} </table> </div> </body> </html>