Nested JSON Web Token (JWT)
draft-yusef-oauth-nested-jwt-01

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OAuth Working Group                                       R. Shekh-Yusef
Internet-Draft                                                     Avaya
Intended status: Standards Track                            July 8, 2019
Expires: January 9, 2020

                      Nested JSON Web Token (JWT)
                    draft-yusef-oauth-nested-jwt-01

Abstract

   This specification extends the scope of the Nested JSON Web Token
   (JWT) to allow the enclosing JWT to contain its own Claims Set in
   addition to the enclosed JWT.

Status of This Memo

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   This Internet-Draft will expire on January 9, 2020.

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Overview  . . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Use Case  . . . . . . . . . . . . . . . . . . . . . . . . . .   3
   4.  JWT Content Type Header Parameter . . . . . . . . . . . . . .   3
   5.  JWT Content . . . . . . . . . . . . . . . . . . . . . . . . .   4
   6.  Example . . . . . . . . . . . . . . . . . . . . . . . . . . .   4
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .   4
   8.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   4
   9.  Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .   4
   10. Normative References  . . . . . . . . . . . . . . . . . . . .   5
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .   5

1.  Introduction

   JSON Web Token (JWT) is a mechanism that is used to transfer claims
   between two parties across security domains.  Nested JWT is a JWT in
   which the payload is another JWT.  The current specification does not
   define a means by which the enclosing JWT could have its own Claims
   Set, only the enclosed JWT would have claims.

   This specification extends the scope of the Nested JWT to allow the
   enclosing JWT to contain its own Claims Set in addition to the
   enclosed JWT.

1.1.  Terminology

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

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2.  Overview

   RFC7519 defines Nested JWT as a JWT in which nested signing and/or
   encryption are employed.  In Nested JWTs, a JWT is used as the
   payload or plaintext value of an enclosing JWS or JWE structure,
   respectively.

   To indicate that the payload of an enclosing JWT is yet another JWT,
   the value of the Content Type Parameter of the JOSE header, i.e.
   "cty", must be set to "JWT", which means that the enclosing JWT