JSON Web Signature (JWS) Unencoded Payload Option (RFC7797)
Original Publication Date: 2016-Feb-01
Included in the Prior Art Database: 2016-Feb-26
Internet Society Requests For Comment (RFCs)
The "JSON Web Signature (JWS)" [JWS] specification defines the JWS Signing Input as the input to the digital signature or Message Authentication Code (MAC) computation, with the value ASCII(BASE64URL(UTF8(JWS Protected Header)) || '.' || BASE64URL(JWS Payload)). While this works well in practice for many use cases, including those accommodating arbitrary payload values, other use cases have been described in which base64url-encoding the payload is unnecessary and/or an impediment to adoption, particularly when the payload is large and/or detached.
Internet Engineering Task Force (IETF) M. Jones Request for Comments: 7797 Microsoft Updates: 7519 February 2016 Category: Standards Track ISSN: 2070-1721
JSON Web Signature (JWS) Unencoded Payload Option
JSON Web Signature (JWS) represents the payload of a JWS as a base64url-encoded value and uses this value in the JWS Signature computation. While this enables arbitrary payloads to be integrity protected, some have described use cases in which the base64url encoding is unnecessary and/or an impediment to adoption, especially when the payload is large and/or detached. This specification defines a means of accommodating these use cases by defining an option to change the JWS Signing Input computation to not base64url- encode the payload. This option is intended to broaden the set of use cases for which the use of JWS is a good fit.
This specification updates RFC 7519 by stating that JSON Web Tokens (JWTs) MUST NOT use the unencoded payload option defined by this specification.
Status of This Memo
This is an Internet Standards Track document.
This document is a product of the Internet Engineering Task Force (IETF). It represents the consensus of the IETF community. It has received public review and has been approved for publication by the Internet Engineering Steering Group (IESG). Further information on Internet Standards is available in Section 2 of RFC 5741.
Information about the current status of this document, any errata, and how to provide feedback on it may be obtained at http://www.rfc-editor.org/info/rfc7797.
Jones Standards Track [Page 1]
RFC 7797 JWS Unencoded Payload Option February 2016
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1. Notational Conventi...