JSON Web Encryption (JWE)
draft-ietf-jose-json-web-encryption-38

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JOSE Working Group                                              M. Jones
Internet-Draft                                                 Microsoft
Intended status: Standards Track                           J. Hildebrand
Expires: June 12, 2015                                             Cisco
                                                        December 9, 2014

                       JSON Web Encryption (JWE)
                 draft-ietf-jose-json-web-encryption-38

Abstract

   JSON Web Encryption (JWE) represents encrypted content using
   JavaScript Object Notation (JSON) based data structures.
   Cryptographic algorithms and identifiers for use with this
   specification are described in the separate JSON Web Algorithms (JWA)
   specification and IANA registries defined by that specification.
   Related digital signature and MAC capabilities are described in the
   separate JSON Web Signature (JWS) specification.

Status of this Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
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   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on June 12, 2015.

Copyright Notice

   Copyright (c) 2014 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
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Jones & Hildebrand        Expires June 12, 2015                 [Page 1]
Internet-Draft          JSON Web Encryption (JWE)          December 2014

   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  5
     1.1.  Notational Conventions . . . . . . . . . . . . . . . . . .  5
   2.  Terminology  . . . . . . . . . . . . . . . . . . . . . . . . .  5
   3.  JSON Web Encryption (JWE) Overview . . . . . . . . . . . . . .  8
     3.1.  JWE Compact Serialization Overview . . . . . . . . . . . .  9
     3.2.  JWE JSON Serialization Overview  . . . . . . . . . . . . .  9
     3.3.  Example JWE  . . . . . . . . . . . . . . . . . . . . . . . 10
   4.  JOSE Header  . . . . . . . . . . . . . . . . . . . . . . . . . 11
     4.1.  Registered Header Parameter Names  . . . . . . . . . . . . 11
       4.1.1.  "alg" (Algorithm) Header Parameter . . . . . . . . . . 12
       4.1.2.  "enc" (Encryption Algorithm) Header Parameter  . . . . 12
       4.1.3.  "zip" (Compression Algorithm) Header Parameter . . . . 12
       4.1.4.  "jku" (JWK Set URL) Header Parameter . . . . . . . . . 13
       4.1.5.  "jwk" (JSON Web Key) Header Parameter  . . . . . . . . 13
       4.1.6.  "kid" (Key ID) Header Parameter  . . . . . . . . . . . 13
       4.1.7.  "x5u" (X.509 URL) Header Parameter . . . . . . . . . . 13
       4.1.8.  "x5c" (X.509 Certificate Chain) Header Parameter . . . 13
       4.1.9.  "x5t" (X.509 Certificate SHA-1 Thumbprint) Header
               Parameter  . . . . . . . . . . . . . . . . . . . . . . 14
       4.1.10. "x5t#S256" (X.509 Certificate SHA-256 Thumbprint)
               Header Parameter . . . . . . . . . . . . . . . . . . . 14
       4.1.11. "typ" (Type) Header Parameter  . . . . . . . . . . . . 14
       4.1.12. "cty" (Content Type) Header Parameter  . . . . . . . . 14
       4.1.13. "crit" (Critical) Header Parameter . . . . . . . . . . 14
     4.2.  Public Header Parameter Names  . . . . . . . . . . . . . . 14
     4.3.  Private Header Parameter Names . . . . . . . . . . . . . . 15
   5.  Producing and Consuming JWEs . . . . . . . . . . . . . . . . . 15
     5.1.  Message Encryption . . . . . . . . . . . . . . . . . . . . 15
     5.2.  Message Decryption . . . . . . . . . . . . . . . . . . . . 17
     5.3.  String Comparison Rules  . . . . . . . . . . . . . . . . . 20
   6.  Key Identification . . . . . . . . . . . . . . . . . . . . . . 20
   7.  Serializations . . . . . . . . . . . . . . . . . . . . . . . . 20
     7.1.  JWE Compact Serialization  . . . . . . . . . . . . . . . . 20
     7.2.  JWE JSON Serialization . . . . . . . . . . . . . . . . . . 21
       7.2.1.  General JWE JSON Serialization Syntax  . . . . . . . . 21