Transport Layer Security (TLS) Authorization Using Digital Transmission Content Protection (DTCP) Certificates
RFC 7562

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Independent Submission                                        D. Thakore
Request for Comments: 7562                                     CableLabs
Category: Informational                                        July 2015
ISSN: 2070-1721

           Transport Layer Security (TLS) Authorization Using
      Digital Transmission Content Protection (DTCP) Certificates

Abstract

   This document specifies the use of Digital Transmission Content
   Protection (DTCP) certificates as an authorization data type in the
   authorization extension for the Transport Layer Security (TLS)
   protocol.  This is in accordance with the guidelines for
   authorization extensions as specified in RFC 5878.  As with other TLS
   extensions, this authorization data can be included in the client and
   server hello messages to confirm that both parties support the
   desired authorization data types.  If supported by both the client
   and the server, DTCP certificates are exchanged in the supplemental
   data TLS handshake message as specified in RFC 4680.  This
   authorization data type extension is in support of devices containing
   DTCP certificates issued by the Digital Transmission Licensing
   Administrator (DTLA).

Status of This Memo

   This document is not an Internet Standards Track specification; it is
   published for informational purposes.

   This is a contribution to the RFC Series, independently of any other
   RFC stream.  The RFC Editor has chosen to publish this document at
   its discretion and makes no statement about its value for
   implementation or deployment.  Documents approved for publication by
   the RFC Editor are not a candidate for any level of Internet
   Standard; see 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/rfc7562.

Thakore                       Informational                     [Page 1]
RFC 7562                   TLS Auth Using DTCP                 July 2015

Copyright Notice

   Copyright (c) 2015 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
   to this document.

Table of Contents

   1. Introduction ....................................................3
      1.1. Applicability Statement ....................................3
      1.2. Conventions ................................................4
   2. Overview ........................................................4
      2.1. Overview of DTCP Certificates ..............................4
      2.2. Overview of SupplementalData Handshake .....................5
      2.3. Overview of Authorization Extensions .......................5
      2.4. Overview of SupplementalData Usage for Authorization .......6
   3. DTCP Authorization Data Format ..................................6
      3.1. DTCP Authorization Type ....................................6
      3.2. DTCP Authorization Data ....................................6
      3.3. Usage Rules for Clients to Exchange DTCP
           Authorization Data .........................................7
      3.4. Usage Rules for Servers to Exchange DTCP
           Authorization Data .........................................8
      3.5. TLS Message Exchange with dtcp_authz_data ..................8
      3.6. Alert Messages .............................................9
   4. IANA Considerations ............................................10
   5. Security Considerations ........................................10
   6. References .....................................................11
      6.1. Normative References ......................................11
      6.2. Informative References ....................................12
   Appendix A. Alternate Double Handshake Example ....................13
   Acknowledgements ..................................................15
   Author's Address ..................................................15

Thakore                       Informational                     [Page 2]
RFC 7562                   TLS Auth Using DTCP                 July 2015

1.  Introduction

   The Transport Layer Security (TLS) protocol (see TLS 1.0 [RFC2246],
   TLS 1.1 [RFC4346], and TLS1 .2 [RFC5246]) is being used in an ever
   increasing variety of operational environments, the most common among
   which is its use in securing HTTP traffic [RFC2818].  [RFC5878]
   introduces extensions that enable TLS to operate in environments
   where authorization information needs to be exchanged between the
   client and the server before any protected data is exchanged.  The