OAuth 2.0 Client Intermediary Metadata
draft-parecki-oauth-client-intermediary-metadata-03

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Open Authentication Protocol                                  A. Parecki
Internet-Draft                                                      Okta
Intended status: Standards Track                       February 22, 2021
Expires: August 26, 2021

                 OAuth 2.0 Client Intermediary Metadata
          draft-parecki-oauth-client-intermediary-metadata-03

Abstract

   This specification defines a mechanism for including information
   about additional parties involved in an OAuth transaction by adding a
   new section to the OAuth 2.0 Dynamic Client Registration request, as
   well as requires that authorization servers surface this information
   to users during an OAuth transaction.

Status of This Memo

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   This Internet-Draft will expire on August 26, 2021.

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1.  Introduction

   In some applications of OAuth, there may be multiple legal entities
   which have access to or process data retrieved by an OAuth client.
   In the traditional OAuth model, a "client_id" represents only a
   single application, and so the OAuth consent screen lists just one
   third party: the OAuth client.

   In this situation, in order to comply with various local laws and
   regulations, the user needs to be informed by the authorization
   server of the list of entities that will have access to their data
   after authorizing the client.

   The existing Dynamic Client Registration ([RFC7591]) specification
   lacks a mechanism for communicating a list of additional parties that
   may have access to the user's data.

   This specification extends [RFC7591] and [RFC7592] to define a
   mechanism for including information about the additional parties
   involved in an OAuth transaction by including information about the
   additional intermediaries into the Dynamic Client Registration
   request.  This specification also defines requirements of the OAuth
   authorization server to present this information about the additional
   parties in the OAuth consent screen during an OAuth transaction.

2.  Notational Conventions

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
   "OPTIONAL" in this document are to be interpreted as described in
   [RFC2119].

   Unless otherwise noted, all the protocol parameter names and values
   are case sensitive.

3.  Terminology

   In addition to the terms defined in referenced specifications, this
   document uses the following terms:

   "OAuth":  In this document, "OAuth" refers to OAuth 2.0, [RFC6749].

   "Client":  "Client" has the same definition as in OAuth 2.0, but is
      worth pointing out that the client in this context may be operated
      by a different legal entity than is described by the client name.

   "Intermediary":  One or more entities that the user's data will pass
      through or be shared with by using the OAuth client.  This

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      information is voluntarily provided by the OAuth client, and is
      typically enforced by a business relationship between the
      organization providing the Client and the organization providing
      the Resource Server.

4.  Client Intermediary Metadata

   Registered client intermediaries have a set of metadata values
   associated with the client identifier of the client that represents
   them in the OAuth transaction, such as a user-visible name, logo, and