From b8736814bde6b2030a9040a0fe8d57033281caf7 Mon Sep 17 00:00:00 2001 From: M Hickford Date: Mon, 24 Oct 2022 09:59:24 +0200 Subject: [PATCH] Record OAuth client type at registration (#21316) The OAuth spec [defines two types of client](https://datatracker.ietf.org/doc/html/rfc6749#section-2.1), confidential and public. Previously Gitea assumed all clients to be confidential. > OAuth defines two client types, based on their ability to authenticate securely with the authorization server (i.e., ability to > maintain the confidentiality of their client credentials): > > confidential > Clients capable of maintaining the confidentiality of their credentials (e.g., client implemented on a secure server with > restricted access to the client credentials), or capable of secure client authentication using other means. > > **public > Clients incapable of maintaining the confidentiality of their credentials (e.g., clients executing on the device used by the resource owner, such as an installed native application or a web browser-based application), and incapable of secure client authentication via any other means.** > > The client type designation is based on the authorization server's definition of secure authentication and its acceptable exposure levels of client credentials. The authorization server SHOULD NOT make assumptions about the client type. https://datatracker.ietf.org/doc/html/rfc8252#section-8.4 > Authorization servers MUST record the client type in the client registration details in order to identify and process requests accordingly. Require PKCE for public clients: https://datatracker.ietf.org/doc/html/rfc8252#section-8.1 > Authorization servers SHOULD reject authorization requests from native apps that don't use PKCE by returning an error message Fixes #21299 Co-authored-by: wxiaoguang Co-authored-by: Lunny Xiao --- doc/developers/oauth2-provider.md | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/doc/developers/oauth2-provider.md b/doc/developers/oauth2-provider.md index 9e6ab117..c6765f19 100644 --- a/doc/developers/oauth2-provider.md +++ b/doc/developers/oauth2-provider.md @@ -44,6 +44,12 @@ To use the Authorization Code Grant as a third party application it is required Currently Gitea does not support scopes (see [#4300](https://github.com/go-gitea/gitea/issues/4300)) and all third party applications will be granted access to all resources of the user and their organizations. +## Client types + +Gitea supports both confidential and public client types, [as defined by RFC 6749](https://datatracker.ietf.org/doc/html/rfc6749#section-2.1). + +For public clients, a redirect URI of a loopback IP address such as `http://127.0.0.1/` allows any port. Avoid using `localhost`, [as recommended by RFC 8252](https://datatracker.ietf.org/doc/html/rfc8252#section-8.3). + ## Example **Note:** This example does not use PKCE.