The Grant Negotiation and Authorization Protocol
draft-hardt-xauth-protocol-14

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Network Working Group                                      D. Hardt, Ed.
Internet-Draft                                                SignIn.Org
Intended status: Standards Track                          15 August 2020
Expires: 16 February 2021

            The Grant Negotiation and Authorization Protocol
                     draft-hardt-xauth-protocol-14

Abstract

   Client software often desires resources or identity claims that are
   independent of the client.  This protocol allows a user and/or
   resource owner to delegate resource authorization and/or release of
   identity claims to a server.  Client software can then request access
   to resources and/or identity claims by calling the server.  The
   server acquires consent and authorization from the user and/or
   resource owner if required, and then returns to the client software
   the authorization and identity claims that were approved.  This
   protocol may be extended on many dimensions.

Status of This Memo

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   This Internet-Draft will expire on 16 February 2021.

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   Copyright (c) 2020 IETF Trust and the persons identified as the
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Hardt                   Expires 16 February 2021                [Page 1]
Internet-DrafThe Grant Negotiation and Authorization Protoco August 2020

   extracted from this document must include Simplified BSD License text
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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  The Grant . . . . . . . . . . . . . . . . . . . . . . . .   4
     1.2.  Protocol Roles  . . . . . . . . . . . . . . . . . . . . .   4
     1.3.  Human Interactions  . . . . . . . . . . . . . . . . . . .   5
     1.4.  Trust Model . . . . . . . . . . . . . . . . . . . . . . .   7
     1.5.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   8
     1.6.  Notational Conventions  . . . . . . . . . . . . . . . . .  10
   2.  Exemplar Sequences  . . . . . . . . . . . . . . . . . . . . .  11
     2.1.  "redirect" Interaction  . . . . . . . . . . . . . . . . .  11
     2.2.  "user_code" Interaction . . . . . . . . . . . . . . . . .  13
     2.3.  Independent RO Authorization  . . . . . . . . . . . . . .  14
     2.4.  Resource Server Access  . . . . . . . . . . . . . . . . .  15
   3.  GS APIs . . . . . . . . . . . . . . . . . . . . . . . . . . .  15
     3.1.  GS API Table  . . . . . . . . . . . . . . . . . . . . . .  16
     3.2.  Create Grant  . . . . . . . . . . . . . . . . . . . . . .  16
     3.3.  Verify Grant  . . . . . . . . . . . . . . . . . . . . . .  19
     3.4.  Read Grant  . . . . . . . . . . . . . . . . . . . . . . .  20
     3.5.  Request JSON  . . . . . . . . . . . . . . . . . . . . . .  20
       3.5.1.  "client" Object . . . . . . . . . . . . . . . . . . .  20
       3.5.2.  "interaction" Object  . . . . . . . . . . . . . . . .  21
       3.5.3.  "user" Object . . . . . . . . . . . . . . . . . . . .  21
       3.5.4.  "access" Object . . . . . . . . . . . . . . . . . . .  22
       3.5.5.  "claims" Object . . . . . . . . . . . . . . . . . . .  22
     3.6.  Read Access . . . . . . . . . . . . . . . . . . . . . . .  22
     3.7.  GS Options  . . . . . . . . . . . . . . . . . . . . . . .  23
   4.  GS Responses  . . . . . . . . . . . . . . . . . . . . . . . .  23
     4.1.  Grant Response  . . . . . . . . . . . . . . . . . . . . .  23
     4.2.  Interaction Response  . . . . . . . . . . . . . . . . . .  25
     4.3.  Wait Response . . . . . . . . . . . . . . . . . . . . . .  26
     4.4.  Response JSON . . . . . . . . . . . . . . . . . . . . . .  26
       4.4.1.  "client" Object . . . . . . . . . . . . . . . . . . .  27
       4.4.2.  "interaction" Object  . . . . . . . . . . . . . . . .  27
       4.4.3.  "access" Object . . . . . . . . . . . . . . . . . . .  27
       4.4.4.  Access Response Object  . . . . . . . . . . . . . . .  27